201026492 六、發明說明： 【發明所屬之技術領域】 本發明係有關一種在由鎂合金所形成的基材上具備被 覆層之鎂合金構件。特別是有關一種金屬質感高的鎂合金 構件。 【先前技術】 在鎂中含有各種添加元素之鎂合金，可利用於手機或 個人電腦之攜帶電氣機器類之框體或汽車零件等的構件材 Φ 料。鎂合金由於爲活性金屬，在上述構件之表面上實施有 以防腐蝕爲目的之表面處理（例如參照專利文獻1，2)。 另外，鎂合金由於具有六方晶體之結晶構造（hep構 造）’缺乏在常溫下之塑性加工性，故上述框體等之鎂合金 構件以藉由塑模鑄造法或觸熔模塑（thixomolding)法之鑄 造材料爲主流。最近，進行檢討在ASTM規格中由AZ3 1 合金所形成的板材上實施壓製加工處理，形成前述框體。 而且，於專利文獻3中提案由AS TM規格中相當於AZ91 ® 合金之合金所形成，壓製加工性優異的板材。 【專利文獻1】 日本特開2002-285361號公報 【專利文獻2】 日本特開2004-149911號公報 【專利文獻3】 日本特開2007-98470號公報 【發明内容】 目前，對上述框體之鎂合金構件而言，要求提高金靨 質感、增加高級感等。然而，於專利文獻1，2中雖提案有 不會損害金屬光澤之表面處理劑，惟沒有進行檢討有關提 201026492 髙金屬質感。而且，於專利文獻3中亦沒有提及 金屬質感。 因此，本發明之目的係爲提高金屬質感高的 件。 本發明藉由在至少部分由鎂合金所形成的基 具有實施有提高金屬質感之加工處理的表面加工 上述目的。具體而言，本發明之鎂合金構件，具 金所形成的基材、與在該基材上所形成的被覆層 〇 材係在至少部分其表面上具有可得金屬質感、實 凹凸加工處理之表面加工部。另外，上述被覆層 本發明之鎂合金構件，藉由具有上述表面加 有效地提高金屬質感。而且，本發明之構件，藉 覆層，可具有充分的防腐蝕性。特別是藉由該被 明，可使來自外部之光透過被覆層，容易在上述 部亂反射（diffused reflection)，自任何方向観察 容易感受到金屬質感。因此，本發明之構件具有 © 腐蝕性，且金屬質感高，創意性優異。於下述中 詳細地說明本發明。 <基材> . <<組成>> 構成本發明構件之基材的鎂合金，係可利用 中含有添加元素之各種組成者（殘餘部分：Mg及: 沒有特別的限制。例如，Mg-A1系、Mg-Zn系、 土類元素）系、添加Y之合金等。特別是含有A1 系合金，耐腐独性高，故較佳。Mg-Al系合金例 有關提筒 鎂合金構 材表面上 部，達成 備由鎂合 ，上述基 施有微細 爲透明。 工部，可 由具備被 覆層爲透 表面加工 時，皆可 企求的防 ，可更爲 在鎂（Mg) 不純物）， Mg-RE(稀 之 Mg-Al 如 A S T Μ .201026492 規格中AZ系合金（Mg-Al-Zn系合金、Zn:0.2〜1.5質量％)、 AM系合金（Mg-Al-Mn系合金、Mn:0.15〜0.5質量％)、AS 系合金（Mg-Al-Si 系合金、Si:0.6 〜1.4 質量 ％)、Mg-Al-RE (稀 土類元素）系合金、在此等之Mg-A1系合金中另外添加有1 種以上選自由Bi、Sn、Pb、Ca及Be所成群的元素之合金 等》A1之含有量以1.0質量％以上、11質量％以下較佳， A1量增多時，耐腐蝕性或強度之機械特性雖優異，惟過多 時’由於塑性加工性容易降低，考慮耐腐蝕性、機械特性 φ 及成形性時，以8質量％以上、1 1質量％以下更佳。特別是 可適當地利用含有8〜11質量％之A1、0.2〜1.5質量％之 Zn的Mg-Al系合金（典型例如AZ80、AZ91)。此等之合金， 即使於實施有微細的凹凸加工處理後，基材表面仍不易變 色’容易得到金屬光澤等之金屬質感，故較佳。 <<形態>> 基材之典型例，如使鑄造材料進行壓延處理之壓延材 料、對該壓延材料另外施加有熱處理或均化加工處理、硏 ❹ 磨加工處理等之加工材料、對此等壓延材料或加工材料另 外施加有壓製加工或彎曲加工、锻燒鑄造加工處理之塑性 加工處理之塑性加工材料。實施有壓延或壓製加工等之塑 性加工處理的基材，不僅結晶粒徑微細、較鑄造材料之強 度的機械特性更爲優異，且孔洞或空隙（孔隙）之內部缺陷 或表面缺陷變少、具有良好的表面性質。而且，使壓延材 料與鑄造材料相比時，由於表面缺陷情形少，於被覆層形 成前、可減低缺陷粒子之埋入（修正缺陷）處理、或沒有進 行處理、或可減低因修正缺陷處理不充分所導致的不良品 201026492 產生情形，故可提高製品之處理性。於下述中，說明鑄造 條件及壓延條件。 <<製造方法>> [鑄造條件] 鑄造材料以藉由雙輥法之連續鑄造法、特別是 WO/2 0 06/003 8 99中記載的鑄造方法予以製造較佳。由於連 續鑄造法可能會有急冷凝固情形，可減低氧化物或離析 等’可製得壓延處理之塑性加工性優異的鑄造材料。另外， 〇 藉由對該鑄造材料實施壓延處理，會有對繼後之壓製加工 處理等之塑性加工處理產生不良影響的缺陷，例如消除粒 徑爲ΙΟμιη以上之粗大的結晶物。特別是AZ系合金，A1 量愈多時、會有愈容易生成結晶物的傾向，惟藉由對上述 連續鑄造材料實施壓延處理，不論合金組成，可得上述缺 陷情形少的壓延材料。亦可對所得的鑄造材料實施爲使組 成均質化時之熱處理（溶體化處理、加熱溫度：3 8 0〜42(TC、 加熱時間：60〜6 00分鐘）或時效處理等。特別是爲AZ系合 ® 金時，A1之含有量高者以進行長時間溶體化較佳。鑄造材 料之大小，沒有特別的限制，惟由於厚度過厚時容易產生 離析情形，以1 〇mm以下較佳。 [壓延條件] 壓延處理係以在加工對象之加熱溫度爲200〜400°C、 壓延輥之加熱溫度爲150〜250 °C、每1次之壓下率爲10〜 5 0%之條件下數次進行較佳。另外，可得企求厚度之壓延 材料下，以適當組合上述各條件較佳。藉由適當組合上述 各溫度、及每1次之壓下率、次數之條件，例如可在壓延 .201026492 前之板厚爲3〜8mm之加工對象爲1 mm以下，具體而言可 壓延至0.2 mm之厚度爲止。習知的條件例如亦可利用專利 文獻3所揭示的控制壓延處理等。 於壓延加工途中進行中間熱處理（加熱溫度：250〜 350 °C、加熱時間：20〜60分鐘）’藉由直至該熱處理之加工 處理以除去、減輕導入加工對象之變形或殘留應力、集合 組織等，可防止繼後之壓延處理時產生不需的割裂或傾 倒、變形，更爲順利地進行壓延處理較佳。另外，以於最 φ 終的壓延處理後實施最終的熱處理，製得強度優異的壓延 材料較佳。最終熱處理前之壓延材料，具有充分囤積加工 變形的結晶組織，藉由最終熱處理以形成微細的再結晶組 織，可提高強度。此外，該具有再結晶組織之最終熱處理 後的壓延材料，藉由壓製加工時之加熱處理，不易使結晶 粒粗大化。最終熱處理之加熱溫度，例如爲AZ系合金時， A1量愈高時，可更爲提高溫度，故較佳，A1量爲8〜11質 量％時爲300〜340 °C、加熱時間：1〇〜30分鐘爲較佳。於此 ® 等之熱處理中，溫度過高、且時間過長時，導致結晶粒過 於粗大化、且會降低壓製加工處理等之塑性加工性。 被實施上述壓延處理之壓延材料，結晶粒徑之不均勻 性變小，鑄造時之離析（例如Mg17Al122金屬間化合物）或 內部缺陷、表面缺陷等情形變少，故具有高的塑性加工性、 且可有效地減低加工中產生的龜裂或破裂情形，具有優異 的表面性質。 [壓延後塑性加工前之預備加工] 於所得的壓延材料中，以實施爲矯正壓延材料之扭轉 201026492 或結晶粒之配向等時之均化加工處理或爲使壓延材料之表 面平滑化時之硏磨加工處理較佳。均化加工處理，例如將 壓延材料通過滾筒均化器來進行，硏磨加工處理之典型例 爲濕式帶式硏磨處理。砥粒係以#240以上爲較佳，以#320 以上爲更佳’以#600爲最佳。實施有上述之預備加工處理 的壓延材料、或對該壓延材料實施有壓製加工之塑性加工 處理的塑性加工材料，容易均勻地實施下述之凹凸加工處 理。 φ [塑性加工] 壓製加工、深拉伸加工 '煅燒鑄造加工、吹塑加工、 彎曲加工之塑性加工處理，以壓延材料之組織予以再結晶 化，在壓延材料之機械特性沒有很大變化的溫度範圍、具 體而言爲2 5 0°C以下之溫度、特別是200〜250°C之溫度範圍 內來進行爲較佳。對該溫度之壓延材料進行塑性加工處理 時，由於在沒有塑性變形之處結晶粒的尺寸大小幾乎完全 沒有變化，所以該處之強度在塑性加工前後不易產生變 Φ 化，可維持高強度，可得高強度之塑性加工材料。 上述塑性加工處理，亦可在下述凹凸加工之加工前、 同凹凸加工之加工後、下述之被覆層形成前、同形成後之 任意階段中進行。 可於塑性加工後實施熱處理，除去藉由塑性加工處理 所導入的變形或殘留應力，以提高機械特性。熱處理條件 例如加熱溫度：100〜450°c、加熱時間：5分鐘〜40小時之程 度。 <<表面加工部>> .201026492 本發明之構件，其特徵之一爲在至少部分上述之基材 表面上具備實施有微細的凹凸加工處理之表面加工部。該 凹凸加工處理，係爲賦予提高金屬質感之加工處理，具體 而言例如切削加工、硏磨加工、噴塗加工及使用酸之腐蝕 加工處理中之任何一種。更具體而言，例如精細直線紋理 加工、菱形切割加工、旋轉切割加工、噴砂拋光加工、及 蝕刻加工處理中之任何一種。本發明之構件，可以實施此 等之加工處理中的任何一種，亦可組合數種之凹凸加工處 參 理。 微細的凹凸處理，具體而言例如表面粗度以Rmax(最 大高度：由最低位置至最高位置之距離）表示爲Ιμηι以上、 200 μιη以下者。具有滿足上述範圍之凹凸時，來自朝向本 發明構件之外部的光，藉由在本發明構件之表面上亂反 射’即使自任何方向觀察本發明之構件時，可充分感受到 金屬質感。未達Ιμηι之較爲平滑狀態，實質上雖可得與經 鏡面加工處理時相同的優異金靥光澤，惟不易提高金屬質 ® 感；大於200μιη之粗糙狀態，不易得到金屬質感。表面粗 度以Rmax表示時，以Ιμιη以上、50μπι以下更佳。而且， 爲提高基材與被覆層之密接性時，使基材予以粗面化，惟 該粗面化係在不會損害金屬光澤之範圍內予以進行，沒有 提高金屬質感。 上述之表面加工部，可僅爲基材表面之一部分，爲本 發明構件之表裏時，可僅在表側（一側之全面），亦可遍及 於全體（表裏全面）。惟於凹凸加工後進行上述之塑性加工 處理時，由於塑性加工處理會使凹凸倒塌，恐會降低金屬 -10 - 201026492 質感時，以於上述塑性加工後進行凹凸加工處理較佳。特 別是在一面或表裏全面遍及表面加工部時，由於會提高藉 由塑性加工處理使凹凸倒塌之可能性，故以於上述塑性加 工處理後進行凹凸加工處理較佳。另外，於上述塑性加工 處理時使用潤滑劑，且在沒有表面加工部之凹凸倒塌下進 行塑性加工處理時，亦可在凹凸加工後進行塑性加工處 理。例如，使實施有凹凸加工處理之原料夾於鐵弗龍（註冊 商標）之氟系樹脂製薄片中，進行壓製加工處理等。進行該 〇 塑性加工時，於塑性加工後所得的構件之表面形狀，幾乎 可維持塑性加工前之原料的表面形狀。因此，例如可藉由 使用其全面上實施有凹凸加工處理者作爲原料，可容易製 造基材全面爲表面加工部之構件》 <被覆層> 本發明之構件，其特徵之一爲在其表面上具備透明的 被覆層。藉由在基材上具備透明的被覆層，可容易以目視 確認在基材表面上所設置的表面加工部，容易感受到金靥 ® 質感。被覆層係可爲有色透明，爲無色透明時，則可感受 基材本身之色調或質感，可更爲感受到金屬質感。而且， 透明係指以目視可確認基材的程度。 被覆層以至少具有防腐蝕性爲較佳，以具備裝飾性與 提高商品價値爲更佳。例如，被覆層例如爲具備具防腐蝕 性之防腐蝕層、與保護或裝飾等功能之塗設層的多層構 造。防腐蝕層配置於基材側，塗設層配置於防腐蝕層上。 上述之防腐蝕層，只要是具有企求的防腐蝕性者即 可，沒有特別的限制。典型例如藉由防腐蝕處理（化成處理 -11- 201026492 或陽極氧化處理）所形成者。進行上述之防腐蝕 材表面之鎂被氧化、且生成鎂之氧化物，由該 成的層形成作爲防腐蝕層之功能。該防腐蝕層 工之塑性加工處理前形成，亦可在塑性加工處 於塑性加工處理前具備防腐蝕層時，於塑性加 層具有作爲潤滑劑之功能的傾向。此外，該防 會產生微細的破裂（割裂）狀態，故藉由在破裂 層之構成材料，可提高與塗設層之密接性，故 φ 上述之防腐蝕層，表面電阻率小時，：! 0.2Ω·(：ιη以下，本發明之構件爲電子機器框體 接地，故較佳。使表面電阻率小時，例如使被 予以薄化。防腐蝕層之厚度爲2μιη以下時，容 阻層。而且，上述之防腐蝕層，使厚度爲2μιη 是0.5 μιη以下之薄度化時，容易得到透明感。 述框體等時，接地之面（大多爲框體之內面）， 沒有被要求裝飾性，可沒有設置塗設層而僅 φ 層。在僅形成防腐飩層之處（例如企求表面電Ρ 可適當地進行光罩處理等，僅在企求之處形成 另外，防腐蝕層可使用專利文獻1中記載 面處理劑予以形成。 上述塗設層，爲透明、且與防腐蝕層之密 具有某種程度的耐腐蝕性或表面硬度優異者即 別的限制。例如，可利用使用透明的丙烯酸樹 之習知透明塗設或透明的氟系樹脂。利用上述 形成塗設層時，可利用濕式法（浸漬法、噴霧塗 處理時，基 氧化物所形 可在壓製加 理後形成。 工處理時該 腐蝕層由於 中加入塗設 較佳。 基體而言爲 時，可予以 覆層之厚度 易形成低電 以下、特別 而且，於上 由於大多數 形成防腐蝕 Β低之處）， 塗設層。 的透明的表 接性優異、 可，沒有特 脂等之樹脂 之樹脂等以 :設、電熔塗 -12- 201026492 設等）、乾式法（PVD法、CVD法）中之任何一種。本發 構件，藉由具備上述之透明的塗設層，可提高金屬質 且可提高商品價値》塗設層恐會因塑性加工處理導致 情形時，以於塑性加工處理後形成較佳。而且，塗設 考慮表面加工部之金屬質感的良好表現性或製造之容 等時，以厚度爲30 μιη以下較佳。塗設層之厚度變厚 恐會有來自外部之光的反射光干涉，表面加工部之清 不明顯，金屬質感變薄。 Φ 發明效果 本發明之鎂合金構件，金屬質感高、商品價値高 爲實施發明之最佳形態 於下述中，說明本發明之實施形態。 【實施方式】 [試驗例1] 製作具備由鎂合金所形成的基材、被覆該表面之 層的壓製成形體，進行有關外觀之平板試驗。 ® 基材係如下述予以製作。使用藉由具有Mg-201026492 VI. Description of the Invention: [Technical Field] The present invention relates to a magnesium alloy member having a coating layer on a substrate formed of a magnesium alloy. In particular, it relates to a magnesium alloy member having a high metallic texture. [Prior Art] A magnesium alloy containing various additive elements in magnesium can be used for a component such as a frame or an automobile part of a mobile phone or a personal computer. Since the magnesium alloy is an active metal, surface treatment for the purpose of preventing corrosion is applied to the surface of the above member (see, for example, Patent Documents 1, 2). In addition, since the magnesium alloy has a crystal structure (hep structure) of a hexagonal crystal, which lacks plastic workability at normal temperature, the magnesium alloy member of the above-mentioned frame or the like is molded by a die casting method or a thixomolding method. The casting materials are the mainstream. Recently, it has been reviewed to perform press processing on a sheet material formed of an AZ3 1 alloy in the ASTM specification to form the above-mentioned frame. Further, Patent Document 3 proposes a sheet material which is formed of an alloy corresponding to an AZ91 ® alloy in the ASTM specification and which is excellent in press workability. [Patent Document 1] Japanese Laid-Open Patent Publication No. 2004-149911 (Patent Document 3) Japanese Laid-Open Patent Publication No. Hei. No. 2007-98470. In the case of a magnesium alloy member, it is required to improve the texture of the metal enamel and to increase the sense of high quality. However, in Patent Documents 1, 2, a surface treatment agent which does not impair the metallic luster is proposed, but no review has been made regarding the texture of the base metal of 201026492. Further, Patent Document 3 does not mention metal texture. Therefore, the object of the present invention is to improve a member having a high metallic texture. The present invention is achieved by a surface having at least a portion of a magnesium alloy having a processing which is subjected to a processing for improving the metallic texture. Specifically, in the magnesium alloy member of the present invention, the base material formed of gold and the coated layer of the base material formed on the base material have a metal texture and a real unevenness treatment on at least part of the surface thereof. Surface processing department. Further, the above-mentioned coating layer of the magnesium alloy member of the present invention has an effect of improving the metallic texture by having the above surface. Moreover, the member of the present invention, with a coating layer, can have sufficient corrosion resistance. In particular, according to the above description, light from the outside can be transmitted through the coating layer, and it is easy to diffuse reflection in the above portion, and it is easy to feel the metallic texture from any direction. Therefore, the member of the present invention is corrosive, has a high metallic texture, and is excellent in creativity. The present invention will be described in detail below. <Substrate>. <<Composition>> The magnesium alloy constituting the substrate of the member of the present invention can be used in various compositions containing an additive element (residue: Mg and: not particularly limited. For example, a Mg-A1 system, a Mg-Zn system, a earth element), an alloy in which Y is added, or the like. In particular, it is preferable to contain an A1 alloy and have high corrosion resistance. For the Mg-Al alloy, the upper part of the surface of the magnesium alloy structure is made of magnesium, and the above-mentioned base is fine and transparent. The construction department can be prevented by the coating layer as the surface-transparent processing, and can be more resistant to magnesium (Mg) impurities, Mg-RE (thin Mg-Al such as AST Μ .201026492 specification AZ alloy ( Mg-Al-Zn alloy, Zn: 0.2 to 1.5% by mass), AM-based alloy (Mg-Al-Mn alloy, Mn: 0.15 to 0.5% by mass), AS-based alloy (Mg-Al-Si alloy, Si: 0.6 to 1.4% by mass), a Mg-Al-RE (rare earth element)-based alloy, and one or more of the other Mg-A1 alloys selected from the group consisting of Bi, Sn, Pb, Ca, and Be The content of A1 in the alloy of the group of elements is preferably 1.0% by mass or more and 11% by mass or less. When the amount of A1 is increased, the mechanical properties of corrosion resistance or strength are excellent, but when it is too large, it is easy to be plasticized. When the corrosion resistance, the mechanical properties φ, and the moldability are considered, it is preferably 8 mass% or more and 11 mass% or less. In particular, it is possible to suitably use A1 and 0.2 to 1.5 mass% of 8 to 11 mass%. Zn-based Mg-Al alloys (typically, for example, AZ80, AZ91). These alloys are processed even after fine uneven processing. It is preferable that the surface of the substrate is not easily discolored, and it is easy to obtain a metallic texture such as metallic luster. <<Forms>> A typical example of the substrate, such as a rolled material obtained by subjecting a cast material to a rolling treatment, to the rolled material Further, a processing material to which a heat treatment or a homogenization processing, a honing processing, or the like is applied, a plastic working material to which a press working or a bending process, a sinter casting process, and a plastic working process are additionally applied to the calendered material or the processed material is applied thereto. A substrate which is subjected to a plastic working treatment such as calendering or press processing has a finer crystal grain size, is more excellent in mechanical properties than the strength of the cast material, and has less internal defects or surface defects of pores or voids (pore). It has good surface properties. Moreover, when the calendered material is compared with the cast material, the surface defects are less, and before the formation of the coating layer, the embedding (correction of defects) of the defective particles can be reduced, or the treatment is not performed, or Reduce the occurrence of defective products 201026492 caused by insufficient correction of defective defects, so that the product can be improved Processability. Casting conditions and rolling conditions are described below. <<Manufacturing Method>> [Casting Condition] The cast material is a continuous casting method by a twin roll method, particularly WO/2 0 06/ The casting method described in 003 8 99 is preferably produced. Since the continuous casting method may have a rapid solidification state, it is possible to reduce casting materials such as oxides or segregation, which are excellent in plastic workability in which calendering treatment can be obtained. When the casting material is subjected to a rolling treatment, there is a defect that adversely affects the plastic working treatment such as the subsequent press working treatment, for example, the coarse crystal material having a particle diameter of ΙΟμηη or more is eliminated. In particular, in the case of the AZ-based alloy, the more the amount of A1 is, the more likely it is to form crystals. However, by subjecting the above-mentioned continuous casting material to a rolling treatment, it is possible to obtain a rolled material having a small number of defects regardless of the alloy composition. The obtained cast material may be subjected to heat treatment (solution treatment, heating temperature: 380 to 42 (TC, heating time: 60 to 600 minutes), aging treatment, etc.), in particular, for the homogenization of the composition. In the case of AZ-based® gold, the high content of A1 is preferred for long-term solution. The size of the cast material is not particularly limited, but it is easy to cause segregation when the thickness is too thick, and is less than 1 〇mm. [Pre-calendering condition] The calendering treatment is carried out under the conditions that the heating temperature of the object to be processed is 200 to 400 ° C, the heating temperature of the calender roll is 150 to 250 ° C, and the reduction ratio per one time is 10 to 50%. It is preferable to carry out the following several times, and it is preferable to appropriately combine the above conditions under the calendering material of a desired thickness. By appropriately combining the above-mentioned respective temperatures and the conditions of the reduction ratio and the number of times per one time, for example, The object to be processed having a thickness of 3 to 8 mm before the rolling of .201026492 is 1 mm or less, and specifically, it can be rolled to a thickness of 0.2 mm. Conventional conditions can be, for example, controlled rolling treatment disclosed in Patent Document 3. On the way to the calendering process Inter-heat treatment (heating temperature: 250 to 350 ° C, heating time: 20 to 60 minutes) can be prevented by the processing until the heat treatment to remove and reduce deformation or residual stress introduced into the processing object, aggregate structure, and the like In the rolling treatment, unnecessary rolling, pouring, and deformation are caused, and the rolling treatment is more smoothly performed. Further, it is preferable to carry out the final heat treatment after the final rolling treatment of the most φ to obtain a rolled material excellent in strength. The calendered material before the final heat treatment has a crystal structure which is sufficiently entangled and processed, and the final heat treatment is performed to form a fine recrystallized structure, thereby improving the strength. Further, the calendered material after the final heat treatment having the recrystallized structure is pressed. In the heat treatment during processing, it is difficult to coarsen the crystal grains. When the heating temperature of the final heat treatment is, for example, an AZ alloy, the higher the A1 amount, the higher the temperature can be, so that the amount of A1 is preferably 8 to 11% by mass. The temperature is 300 to 340 ° C, and the heating time is preferably 1 〇 to 30 minutes. In the heat treatment of this®, etc., the temperature is too high and the time is too long. In this case, the crystal grains are excessively coarsened, and the plastic workability such as press working treatment is lowered. The rolled material subjected to the above-described calendering treatment has a small unevenness in crystal grain size, and segregation at the time of casting (for example, Mg17Al122 intermetallic compound) ) or internal defects, surface defects, etc., have high plastic workability, and can effectively reduce cracking or cracking during processing, and have excellent surface properties. [Preparation processing before plastic processing after rolling Among the obtained rolled materials, it is preferable to perform the homogenization processing for correcting the twist of the rolled material 201026492 or the orientation of the crystal grains, or the honing processing for smoothing the surface of the rolled material. The homogenization processing is carried out, for example, by rolling the calender material through a roll homogenizer, and a typical example of the honing processing is a wet belt honing treatment. The granules are preferably #240 or more, and more preferably #320 or more. #600 is the best. The calendering material having the above-described preliminary processing, or the plastic working material subjected to the press working treatment of the rolled material, can easily perform the following uneven processing. φ [Plastic processing] Press processing, deep drawing processing, plastic processing of calcination casting, blow molding, and bending, recrystallization by the structure of the rolled material, and temperature at which the mechanical properties of the rolled material are not greatly changed. The range, specifically, the temperature of 250 ° C or less, particularly 200 to 250 ° C, is preferably carried out. When the calendered material of this temperature is subjected to plastic working, since the size of the crystal grain does not change at all in the absence of plastic deformation, the strength of the portion is less likely to be changed to Φ before and after plastic working, and high strength can be maintained. High-strength plastic processing materials. The plastic working treatment may be carried out before the processing of the following concavo-convex processing, after the processing of the concavo-convex processing, before the formation of the coating layer described below, and at any stage after the formation. The heat treatment may be performed after the plastic working to remove the deformation or residual stress introduced by the plastic working treatment to improve the mechanical properties. The heat treatment conditions are, for example, heating temperature: 100 to 450 ° C, and heating time: 5 minutes to 40 hours. <<Surface-finished part>>. 201026492 One of the features of the member of the present invention is that a surface-treated portion having a fine unevenness processing is provided on at least a part of the surface of the substrate. The uneven processing is a processing for imparting a metallic feeling, and specifically, for example, cutting, honing, spraying, and etching using acid. More specifically, for example, any of fine linear texture processing, diamond cutting processing, rotary cutting processing, sand blast polishing processing, and etching processing. The member of the present invention can be subjected to any of these processing operations, and a plurality of types of uneven processing portions can be combined. Specifically, for example, the surface roughness is expressed by Rmax (maximum height: distance from the lowest position to the highest position) of Ιμηι or more and 200 μmη or less. When the irregularities satisfying the above range are present, the light from the outside of the member of the present invention is reflected by the surface of the member of the present invention. When the member of the present invention is viewed from any direction, the metallic texture can be sufficiently felt. The smoother state of the Ιμηι is not the same as that of the mirror surface treatment, but it is not easy to improve the metallic sensation; the roughness is greater than 200 μm, and the metal texture is not easily obtained. When the surface roughness is represented by Rmax, it is preferably Ιμηη or more and 50 μπι or less. Further, in order to improve the adhesion between the substrate and the coating layer, the substrate is roughened, but the roughening is carried out within a range that does not impair the metallic luster, and the metal texture is not improved. The surface-treated portion described above may be only a part of the surface of the substrate, and may be on the front side (all sides) or the entire surface (all in the table) when it is in the surface of the member of the present invention. However, when the above-described plastic working treatment is performed after the uneven processing, the unevenness is collapsed due to the plastic working treatment, and when the texture of the metal -10 - 201026492 is lowered, it is preferable to perform the uneven processing after the plastic working. In particular, when the surface processing portion is entirely spread over one surface or the surface, since the possibility of collapse of the unevenness by the plastic working treatment is increased, it is preferable to perform the uneven processing after the plastic working treatment. Further, when a lubricant is used in the plastic working treatment, and the plastic working treatment is performed without the unevenness of the surface-treated portion, the plastic working may be performed after the uneven processing. For example, the raw material subjected to the uneven processing is sandwiched between a fluorine-based resin sheet of Teflon (registered trademark), and subjected to press processing or the like. When the 〇 plastic working is performed, the surface shape of the member obtained after the plastic working can almost maintain the surface shape of the raw material before the plastic working. Therefore, for example, it is possible to easily manufacture a member whose entire substrate is a surface-treated portion by using a material having a roughening process as a raw material. "The coating member" is one of the features of the present invention. A transparent coating is provided on the surface. By providing a transparent coating layer on the substrate, it is possible to easily visually confirm the surface-treated portion provided on the surface of the substrate, and it is easy to feel the texture of the metal enamel. The coating layer can be colored and transparent, and when it is colorless and transparent, the color tone or texture of the substrate itself can be felt, and the metal texture can be more felt. Further, transparency means the degree to which the substrate can be visually confirmed. The coating layer is preferably at least corrosion-resistant, and is more preferable in terms of decorativeness and improvement in commercial price. For example, the coating layer is, for example, a multilayer structure having a corrosion-resistant corrosion-resistant layer and a coating layer having functions such as protection or decoration. The anti-corrosion layer is disposed on the substrate side, and the coating layer is disposed on the anti-corrosion layer. The above-mentioned anticorrosive layer is not particularly limited as long as it has an anticorrosive property as desired. Typically, it is formed by an anti-corrosion treatment (chemical treatment -11 - 201026492 or anodizing treatment). The magnesium on the surface of the above-mentioned anticorrosive material is oxidized to form an oxide of magnesium, and the resulting layer is formed to function as an anticorrosive layer. The anticorrosive layer is formed before the plastic working treatment, and may have a function as a lubricant in the plastic addition layer when the plastic working portion has an anticorrosive layer before the plastic working treatment. In addition, since the rupture (split) state occurs in the rupture layer, the adhesion to the coating layer can be improved by the constituent material of the rupture layer. Therefore, the anti-corrosion layer of φ has a small surface resistivity, and is: 0.2 Ω·(: ηη or less, the member of the present invention is preferably grounded by the electronic device housing, and the surface resistivity is small, for example, thinned. When the thickness of the anticorrosive layer is 2 μm or less, the resistive layer. In the above-mentioned anti-corrosion layer, when the thickness is 2 μm and the thickness is less than 0.5 μm, it is easy to obtain a transparent feeling. When the frame or the like is used, the grounded surface (mostly the inner surface of the frame) is not required to be decorative. In the case where only the coating layer is provided, only the φ layer is formed. In the case where only the anticorrosive layer is formed (for example, the surface electrode can be appropriately subjected to the mask processing, etc., and the etching layer can be formed only in the place where it is desired, and the anticorrosive layer can be used. The surface treatment agent is formed in 1. The coating layer is transparent and has a certain degree of corrosion resistance or surface hardness, which is excellent in adhesion to the anticorrosive layer. For example, transparent use can be utilized. A transparent coating or a transparent fluorine-based resin of the acrylic tree is used. When the coating layer is formed by the above-described method, the wet oxide method (dipping method or spray coating treatment) can be formed after the pressing treatment. In the processing, the etching layer is preferably applied by coating. In the case of the substrate, the thickness of the coating layer can be easily formed below low electricity, and particularly, because most of the corrosion-resistant defects are formed, The transparent layer has excellent transparency, and may be any resin such as a resin such as a resin, or a dry method (PVD method or CVD method). The present invention has the above-mentioned transparent coating layer, which can improve the metal quality and can increase the commercial price. When the coating layer is caused by plastic processing, it is preferably formed after the plastic working treatment. The coating is preferably 30 μm or less in consideration of the good expression of the metal texture of the surface-treated portion, or the thickness of the coating. The thickness of the coating layer is thick, and the reflected light from the external light may interfere. In the case of the magnesium alloy member of the present invention, the metal alloy having high metal texture and high commercial price is the best mode for carrying out the invention. Hereinafter, embodiments of the present invention will be described. [Experimental Example 1] [Preparation Example 1] A press-formed body comprising a base material made of a magnesium alloy and a layer covering the surface was prepared, and a flat test of the appearance was carried out. The base material was produced as follows. -
Al-1.0% Zn(全部爲質量％)之組成（相當AZ91合金之g 的雙輥連續鑄造法所得的厚度5.0mm之鑄造材料。鑄 以WO/2 00 6/003899中記載的條件進行。對該鑄造材料 壓延處理。壓延處理係在加工對象（壓延對象）之加熱 爲200〜400 °C、壓延輥之加熱溫度爲15〇〜250 °C、每 之壓下率爲1〇〜50 %之條件下進行數次’製作厚度爲0 之壓延板。對所得的壓延板依序實施均化加工處理、 加工處理，對切斷成企求大小的切斷片上實施溫間壓 明之 感、 損傷 層就 易性 時， 晰度 被覆 9.0% fi成） 造係 實施 溫度 1次 .5mm 硏磨 製加 -13- 201026492 工處理，製得箱形壓製材料。壓製加工處理係藉由在具有 正方體形狀之凹部的塑模上配置被覆該凹部之上述切斷 片，押附正方體形之穿孔予以進行。穿孔係以60x90mm之 正方體，連接於切斷片之四個角具有所定的圓形。而且， 在上述塑模及穿孔中埋入加熱器與熱電對，形成可使壓製 時之溫度調節爲企求的溫度之構成。此係在200〜3001：下 進行加熱。 另外’於壓延途中實施中間熱處理，且於壓延後實施 φ 最終熱處理，除去直至熱處理前之壓延處理導入壓延對象 之變形等情形。此外，亦可於對鑄造材料進行熔化體處理 後，實施壓延處理。 (試驗材料1-A) 於所得的箱形壓製材料中，在突出側之表面全面（約 60x90mm)上實施加工半徑：50nm、深度：〇.〇2mm(20pm)、 間距：0.05mm之菱形切割加工處理。該加工處理係以市售 的菱形切割加工機進行。藉由該步驟，製得具有突出側之 ® 表面全面藉由菱形切割加工處理之表面加工部的基材（壓 製材料（塑性加工材料））。 在上述基材上進行底層處理，形成多層之被覆層（防腐 蝕層、塗設層），製得具備具表面加工部之基材與被覆層之 鎂合金構件。底層處理係以脫脂—酸蝕刻—脫污染—表面調 整之順序進行，然後，進行化成處理—乾燥，形成防腐蝕 層（厚度：約〇.5μπι)。在由脫脂至乾燥之各步驟間進行水洗 處理。塗設層（厚度：約20μηι)之形成，以噴霧—塗覆—烘 烤之順序進行。塗設層係僅在基材之外表面側（箱子外側） -14- .201026492 形成，沒有在內表面側（箱子內側）形成。因此’於塗設層 形成前，在內表面側上進行光罩處理。於下述中，詳細說 明有關各步驟（各溶液之濃度以質量％表示）。以藉由該步驟 所得者作爲試驗材料1-A。而且，在基材表面上有缺陷時， 亦可適當地進行粒子埋入與硏磨處理。 脫脂：在1〇%KOH與非離子系界面活性劑0.2%溶液攪 拌下、60°C進行10分鐘 酸蝕刻：在5%有機磷酸溶液之攪拌下、40°C下進行1 _ 分鐘 脫污染：在1〇%KOH溶液之超音波攪拌下、60°C進行 5分鐘 表面調整：在pH値調整爲8之碳酸水溶液攪拌下、 6〇°CX 5分鐘進行 化成處理：使用以10%磷酸爲主成分之A公司製p系 處理液+1%ΚΟΗ作爲處理液，且在攪拌下、30。〇進行2分 鐘 ® 乾燥：150 °C、5分鐘 噴霧塗覆：噴霧塗覆無色透明的丙烯酸系塗料 烘烤：1 5 0 °C、1 〇分鐘 (試驗材料1 -B) 除在所得的箱形壓製材料上沒有進行上述之菱形切割 加工處理外，同樣地以形成基材及被覆層之試料作爲試驗 材料1-B 。A composition of Al-1.0% Zn (all in mass%) (a thickness of 5.0 mm obtained by a two-roll continuous casting method equivalent to g of the AZ91 alloy. The casting was carried out under the conditions described in WO/2 00 6/003899. The casting material is subjected to a rolling treatment. The rolling treatment is performed at a heating target of 200 to 400 ° C for the object to be processed (rolling target), and the heating temperature of the calendering roller is 15 〇 to 250 ° C, and the reduction ratio is 1 〇 to 50%. Under the conditions, a rolling plate having a thickness of 0 is produced several times. The obtained rolled plate is subjected to homogenization processing and processing in sequence, and the feeling of temperature and pressure is cut on the cut piece which is cut into a desired size, and the damaged layer is In the case of easiness, the degree of clarity is 9.0% fi)) The temperature of the system is set to 1 time. The 5mm honing system is added to -13-201026492 to produce a box-shaped pressed material. The press processing is performed by arranging the cut piece covering the concave portion on a mold having a concave portion having a rectangular parallelepiped shape, and attaching a punch having a square shape. The perforation is a square of 60 x 90 mm, and the four corners connected to the cut piece have a predetermined circular shape. Further, a heater and a thermoelectric pair are embedded in the above-mentioned mold and perforation, and a temperature at which the temperature at the time of pressing is adjusted to an optimum temperature is formed. This system is heated at 200 to 3001:. Further, the intermediate heat treatment is carried out in the middle of rolling, and after φ, the final heat treatment is performed, and the rolling treatment until the heat treatment is performed until the deformation of the object to be rolled is introduced. Further, the casting material may be subjected to a calender treatment after being subjected to a melt treatment. (Test material 1-A) In the obtained box-shaped pressed material, a diamond having a processing radius of 50 nm, a depth of 〇.〇2 mm (20 pm), and a pitch of 0.05 mm was performed on the surface of the protruding side (about 60×90 mm). Processing. This processing was carried out using a commercially available diamond cutting machine. By this step, a substrate (compressed material (plastic working material)) having a surface-finished portion whose surface is completely processed by diamond cutting is formed. The underlayer treatment is carried out on the substrate to form a plurality of coating layers (corrosion-preventing layer and coating layer), and a magnesium alloy member having a substrate having a surface-treated portion and a coating layer is obtained. The underlayer treatment is carried out in the order of degreasing-acid etching-decontamination-surface conditioning, and then subjected to chemical treatment-drying to form an anti-corrosion layer (thickness: about 55 μm). The water is washed between the steps from degreasing to drying. The formation of the coating layer (thickness: about 20 μm) was carried out in the order of spray-coating-baking. The coating layer is formed only on the outer surface side (outer side of the case) -14-.201026492, and is not formed on the inner surface side (inside of the case). Therefore, the mask treatment is performed on the inner surface side before the formation of the coating layer. In the following, the respective steps (the concentration of each solution is expressed by mass%) will be described in detail. The person obtained by this step was used as the test material 1-A. Further, when there is a defect on the surface of the substrate, the particle embedding and the honing treatment can be appropriately performed. Degreasing: Acid etching was carried out for 10 minutes at 60 ° C with stirring of 1% KOH and a nonionic surfactant 0.2% solution: decontamination at 40 ° C for 1 _ minutes with stirring of 5% organic phosphoric acid solution: Surface conditioning was carried out at 60 ° C for 5 minutes under ultrasonic agitation of a 1% KOH solution: at a pH of 値 adjusted to 8 aqueous carbonate solution, 6 〇 ° CX for 5 minutes to carry out chemical conversion treatment: using 10% phosphoric acid as the main The component p-based treatment liquid of the company A was made into a treatment liquid, and it was 30 with stirring. 〇 2 minutes® Drying: 150 ° C, 5 minutes Spray coating: Spray coating colorless transparent acrylic coating Baking: 150 ° C, 1 〇 minutes (test material 1 - B) In addition to the resulting box The test piece forming the base material and the coating layer was used as the test material 1-B in the same manner as in the above-described rhombic cutting process.
有關所得的試驗材料丨—A、與1-B，以任何1〇人作爲 試驗對象實施平板試驗時，1〇人中有9人回答試驗材料H -15- 201026492 之金屬質感高、創意性優異。由該結果可知，在基材表面 上具有實施菱形切割加工處理之表面加工部，且具備透明 被覆層之鎂合金構件，金屬質感被提高。而且，平板試驗 之對象，可視使用電腦或手機之鎂合金構件的製品之標的 層（例如喜愛電腦之20歲左右族群等）而定予以選擇。有關 下述之試驗例亦相同。 [試驗例2] 除使試驗例1之試驗材料1-A之菱形切割加工處理改 〇 成精細直線紋理加工處理外，使與試驗材料1-A相同地製 作的試料作爲試驗材料2-A，進行有關外觀之平板試驗。 該試驗係使表面粗度以Rmax(最大高度）爲ΐ〇μιη之精 細直線紋理加工處理進行。有關所得的試驗材料2-Α、與 以試驗例1所製作的試驗材料1-Β (沒有實施精細直線紋理 加工處理或菱形切割加工處理者），以任何1 〇人作爲試驗 對象’實施平板試驗時，10人中有8人回答試驗材料2-Α 之金屬質感高、創意性優異。由該結果可知，在基材表面 ® 上具有實施精細直線紋理加工處理之表面加工部，且具備 透明被覆層之鎂合金構件，金屬質感經提高。 [試驗例3] 除改變試驗例1之試驗材料1-Α之塗設層的構成材料 外’使與試驗材料1-Α相同地製作的試料作爲試驗材料 3-Α’進行有關外觀之平板試驗。 該試驗係在基材上以與上述試驗例1相同的順序進行 底層處理及防腐蝕層之形成，然後，塗覆無色透明的氟系 樹脂（史米弗龍（譯音）：住友電氣工業股份有限公司註冊商 •16- 201026492 標），並予以乾燥。藉由該步驟，可得具備厚度25μιη之透 明塗設層的試驗材料3-Α。 有關所得的試驗材料3-Α、與以試驗例1所製作的試 驗材料1-Β(沒有實施精細直線紋理加工處理或菱形切割加 工處理者），以任何10人作爲試驗對象，實施平板試驗時， 10人中有9人回答試驗材料3-Α之金屬質感高、創意性優 異。 [試驗例4 ] ® 除使試驗例1之試驗材料1-Α之菱形切割加工處理改 成蝕刻加工處理外’使與試驗材料相同地製作的試料 作爲試驗材料4-1A、4-2A’進行有關外觀之平板試驗。 藉由試驗材料4-1A之蝕刻加工處理的表面加工部，如 下述予以形成。在箱形的壓製材料表面上塗覆光阻劑後， 載負所定模樣之光罩予以曝光，且使沒有光硬化處理的部 分以溶劑剝離，使所定的模樣予以圖案化。然後，以離子 硏磨裝置、在壓製材料（原料）露出的部分實施深度1〇 μπι之 ® 乾式蝕刻處理’最後除去光阻劑，在壓製材料之突出側表 面（約60x90nm)上設置所定模樣之凹凸。 藉由試驗材料4-2A之蝕刻加工處理的表面加工部，如 下述予以形成。在箱形的壓製材料表面上以篩網印刷處理 進行印刷所定的模樣後，使沒有印刷的部分藉由酸實施深 度爲20 μιη之蝕刻處理，最後除去印刷部分，在壓製材料 之突出側表面（約60x90nm)上設置所定模樣之凹凸。 有關所得的試驗材料4-1A、4-2A、與以試驗例1所製 作的試驗材料1-B(沒有實施蝕刻加工處理等之凹凸加工處 -17- 中Regarding the obtained test materials 丨-A and 1-B, when any one person was used as the test object, 9 of the 1 person answered that the test material H -15- 201026492 had high metal texture and excellent creativity. . As a result, it was found that the surface of the base material had a surface-processed portion subjected to a rhombic cutting process, and a magnesium alloy member having a transparent coating layer was provided, and the metallic texture was improved. Moreover, the object of the flat test can be selected by using the target layer of the product of the magnesium alloy member of the computer or the mobile phone (for example, a group of around 20 years old who likes a computer). The test examples described below are also the same. [Test Example 2] A sample prepared in the same manner as the test material 1-A was used as the test material 2-A, except that the diamond-shaped cutting process of the test material 1-A of the test example 1 was changed to a fine linear texture process. Conduct a flat panel test on the appearance. This test was carried out by subjecting the surface roughness to a fine linear texture processing with Rmax (maximum height) of ΐ〇μηη. Regarding the obtained test material 2-Α, and the test material 1-Β prepared in Test Example 1 (who did not perform fine linear texture processing or diamond cutting processing), the plate test was carried out with any 1 person as the test object. At the time, 8 out of 10 people answered that the test material 2-Α had a high metal texture and excellent creativity. From this result, it is understood that the surface of the substrate has a surface-processed portion which is subjected to a fine linear texture treatment, and a magnesium alloy member having a transparent coating layer is provided, and the metallic texture is improved. [Test Example 3] A flat test of the appearance was carried out except that the test material of the test material of the test example 1 - the coating material of the coating layer of the test piece 1 was changed, and the sample prepared in the same manner as the test material 1-Α was used as the test material 3-Α' . The test was carried out on the substrate in the same order as in Test Example 1 above, and the formation of an anti-corrosion layer was carried out, followed by coating of a colorless transparent fluorine-based resin (Smith: Transit Limited) Company registrar • 16- 201026492 marked) and dried. By this step, a test material 3-Α having a transparent coating layer having a thickness of 25 μm was obtained. The obtained test material 3-Α, and the test material 1-Β prepared in Test Example 1 (who did not perform fine linear texture processing or diamond cutting processing), were subjected to a flat test when any 10 persons were used as test objects. 9 out of 10 people answered that the test material 3-Α has a high metal texture and excellent creativity. [Test Example 4] ® The sample prepared in the same manner as the test material was changed to the test material 4-1A, 4-2A' except that the diamond-shaped cutting process of the test material of the test example 1 was changed to the etching process. Plate test for appearance. The surface-treated portion subjected to the etching treatment of the test material 4-1A was formed as follows. After the photoresist is coated on the surface of the box-shaped pressed material, the mask carrying the predetermined pattern is exposed, and the portion which is not subjected to the photohardening treatment is peeled off by the solvent to pattern the predetermined pattern. Then, an ion honing device is used, and a portion of the pressed material (raw material) is exposed to a depth of 1 〇μπ®® dry etching treatment. Finally, the photoresist is removed, and a predetermined pattern is placed on the protruding side surface (about 60×90 nm) of the pressed material. Bump. The surface-treated portion subjected to the etching treatment of the test material 4-2A was formed as follows. After printing the predetermined pattern on the surface of the box-shaped pressed material by screen printing, the unprinted portion is subjected to an etching treatment with a depth of 20 μm by acid, and finally the printed portion is removed, on the protruding side surface of the pressed material ( The concave and convex of the predetermined pattern is set on about 60x90 nm. The obtained test materials 4-1A and 4-2A, and the test material 1-B produced in Test Example 1 (the embossing process -17- which was not subjected to etching processing, etc.)
Arrr. ❹ 201026492 理者），以任何10人作爲試驗對象實施平板 10人中有7人回答試驗材料41人之金屬質 優異。10人中有8人回答試驗材料4_2 A之 創意性優異。 而且’上述之實施形態，在沒有脫離本蔡 可適當予以變更，不受上述之構成所限制。 地變更鎂合金之組成、鑄造、壓延、及塑性 鑄造後及壓延後之板厚、凹凸加工處理之形 〇 條件、被覆層之形成材料、形成方法等。 產業上之利用可能性 本發明之鎂合金構件，由於金屬質感高 於作爲攜帶型電氣機器類之框體所企求創意 【圖式簡單說明】 【主要元件符號說明】 無 試驗。結果， 感高、創意性 金屬質感高、 :明之要旨下， 例如，可適當 加工之條件、 成方法、形成 ，可適合利用 性優異的領域 -18 -Arrr. ❹ 201026492 (Revised) The implementation of the tablet with any 10 people as a test subject Seven of the 10 people answered that the test material was excellent in metal quality. Eight of the 10 people answered that the test material 4_2 A was highly creative. Further, the above-described embodiment can be appropriately changed without departing from the present invention, and is not limited to the above configuration. The composition, casting, rolling, and the thickness of the magnesium alloy after casting and rolling, the shape of the uneven processing, the forming material of the coating layer, and the forming method are changed. Industrial Applicability The magnesium alloy member of the present invention has a metal texture higher than that of a frame as a portable electric device. [Simplified description of the drawing] [Explanation of main component symbols] No test. As a result, the feeling of highness and creativity is high, and the metal texture is high. For example, conditions, methods, and formations that can be appropriately processed can be suitable for fields with excellent use.