JPH0579609B2 - - Google Patents
Info
- Publication number
- JPH0579609B2 JPH0579609B2 JP31940588A JP31940588A JPH0579609B2 JP H0579609 B2 JPH0579609 B2 JP H0579609B2 JP 31940588 A JP31940588 A JP 31940588A JP 31940588 A JP31940588 A JP 31940588A JP H0579609 B2 JPH0579609 B2 JP H0579609B2
- Authority
- JP
- Japan
- Prior art keywords
- glass
- mold
- zirconium
- glass molding
- metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000011521 glass Substances 0.000 claims description 22
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 14
- 229910052726 zirconium Inorganic materials 0.000 claims description 14
- 238000000465 moulding Methods 0.000 claims description 11
- 238000001513 hot isostatic pressing Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 239000010410 layer Substances 0.000 claims description 5
- 239000002344 surface layer Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000009257 reactivity Effects 0.000 description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 238000005271 boronizing Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000007496 glass forming Methods 0.000 description 1
- 239000005355 lead glass Substances 0.000 description 1
- HTUMBQDCCIXGCV-UHFFFAOYSA-N lead oxide Chemical compound [O-2].[Pb+2] HTUMBQDCCIXGCV-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000011775 sodium fluoride Substances 0.000 description 1
- 235000013024 sodium fluoride Nutrition 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- WUUHFRRPHJEEKV-UHFFFAOYSA-N tripotassium borate Chemical compound [K+].[K+].[K+].[O-]B([O-])[O-] WUUHFRRPHJEEKV-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/06—Construction of plunger or mould
- C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
- C03B11/084—Construction of plunger or mould for making solid articles, e.g. lenses material composition or material properties of press dies therefor
- C03B11/086—Construction of plunger or mould for making solid articles, e.g. lenses material composition or material properties of press dies therefor of coated dies
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/06—Construction of plunger or mould
- C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
- C03B11/084—Construction of plunger or mould for making solid articles, e.g. lenses material composition or material properties of press dies therefor
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/02—Press-mould materials
- C03B2215/05—Press-mould die materials
- C03B2215/06—Metals or alloys
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/02—Press-mould materials
- C03B2215/08—Coated press-mould dies
- C03B2215/14—Die top coat materials, e.g. materials for the glass-contacting layers
- C03B2215/22—Non-oxide ceramics
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Ceramic Products (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ガラス成形用型、詳しくは、光学レ
ンズをプレス成形した後磨き工程を必要としない
ガラス成形用型に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a glass molding mold, and more particularly to a glass molding mold that does not require a polishing step after press-molding an optical lens.
ガラス成形工程では供給された軟らかいガラス
はブローやプレスなどの成形を受けながら冷却さ
れる。この工程で重要なことは、軟化したガラス
と反応せず、転写性に優れかつガラス成形面が損
傷を受けない型を使用することである。
In the glass forming process, the supplied soft glass is cooled while being formed by blowing, pressing, etc. What is important in this step is to use a mold that does not react with the softened glass, has excellent transferability, and does not damage the glass molding surface.
従来、このような条件を満たすべくセラミツク
スが、検討されている。例えば、SiC，Si3N4の
焼結体であるが、これはガラスと反応しやすい焼
結助剤の使用や硬度が非常に高いため加工性が悪
いといつた問題点がある。そこで、特開昭63−
185834号公報に記載されているように、モリブデ
ン、タングステンまたはタンタルからなる母材の
表面を硼化処理することが提案されているが、充
分な耐食性等の効果は発揮されない。 Conventionally, ceramics have been considered to meet these conditions. For example, sintered bodies of SiC and Si 3 N 4 have problems such as the use of sintering aids that easily react with glass and poor workability due to their extremely high hardness. Therefore, JP-A-63-
As described in Japanese Patent No. 185834, it has been proposed to boronize the surface of a base material made of molybdenum, tungsten, or tantalum, but this method does not provide sufficient effects such as corrosion resistance.
〔発明が解決しようとする課題〕
本発明者は、さらに改善すべく種々検討した結
果、ガラスとの反応性、転写性、繰り返し使用に
よる損傷、加工性、表面粗度等の点から、金属ジ
ルコニウムを母材として熱間静水圧プレス
（HIP）成形した後にその表面を硼化処理するこ
とが最適であることを見い出し、本発明を完成し
たものである。[Problems to be Solved by the Invention] As a result of various studies aimed at further improvement, the present inventor found that metal zirconium The present invention was completed based on the discovery that it is optimal to use hot isostatic pressing (HIP) to form the base material and then subject the surface to boron treatment.
すなわち、本発明は、熱間静水圧プレス成形さ
れた金属ジルコニウムを主成分とする基材からな
り、その少なくともガラス成形面表層には硼化物
層を形成させてなることを特徴とするガラス成型
用型である。
That is, the present invention provides a glass molding material comprising a base material mainly composed of metallic zirconium formed by hot isostatic pressing, and having a boride layer formed on at least the surface layer of the glass molding surface thereof. It is a type.
以下、さらに詳しく本発明を説明する。 The present invention will be explained in more detail below.
本発明のガラス成型用型は次のようにして得る
ことができる。すなわち、基材である金属ジルコ
ニウムは融点は1890℃であり、通常のガラス成型
時の温度400〜800℃と比べ充分に高く耐熱性は問
題ない。しかしながら、一般に金属材料は数μm
〜数十μmの欠陥が存在するので、そのままでは
ガラス成型用型としては適切ではない。すなわ
ち、高い表面精度を出して欠陥を少なくすること
が必要とされる。そのため、本発明では、金属ジ
ルコニウムを熱間静水圧プレス（HIP）成形して
金属ジルコニウム中の欠陥がないか又は極めて少
ない状態とする。HIP処理条件は1000〜1800℃で
１〜３時間程度行い、N2，Ar等の不活性雰囲気
で１〜10ton／cm2の高圧を印加する。 The glass molding mold of the present invention can be obtained as follows. That is, the melting point of metal zirconium, which is the base material, is 1890°C, which is sufficiently higher than the temperature of 400 to 800°C during normal glass molding, and there is no problem with heat resistance. However, metal materials are generally several μm thick.
Since there are defects of up to several tens of micrometers, it is not suitable as a mold for glass molding as it is. That is, it is necessary to achieve high surface accuracy and reduce defects. Therefore, in the present invention, metal zirconium is molded by hot isostatic pressing (HIP) so that there are no or very few defects in the metal zirconium. The HIP process is performed at 1000 to 1800° C. for about 1 to 3 hours, and a high pressure of 1 to 10 ton/cm 2 is applied in an inert atmosphere such as N 2 or Ar.
金属ジルコニウムの硬度はHv140とセラミツク
スと比べて低く加工は容易である。従つて、型の
形状に加工した後次の硼化処理を行う。 The hardness of metallic zirconium is Hv140, which is lower than that of ceramics, making it easy to process. Therefore, after processing into the shape of the mold, the next boronizing treatment is performed.
金属表面の硼化処理方法としては、例えば、青
木洋一著「セラミツクス製造プロセスVol.第８
章“高温無機物の被覆方法”」に示されているよ
うに、基材金属を硼素原子を含むガス、粉末パツ
クまたは溶融塩中で処理して、硼素を基材中に拡
散浸透させ、その表面近傍に単相または複相のジ
ルコニウム硼化物層を形成させるものである。硼
化処理により耐摩耗性や耐食性が著しく向上す
る。硼化層の深さは数μm〜300μm程度が好まし
く、型の形状としては、直径５〜100mm、厚み５
〜100mmの円柱状が一般的である。 As a method for boriding metal surfaces, for example, see Yoichi Aoki, "Ceramics Manufacturing Process Vol. 8.
As shown in the chapter “High Temperature Inorganic Coating Methods,” the base metal is treated in a gas, powder pack, or molten salt containing boron atoms to diffuse boron into the base material and to coat the surface of the base metal. A single-phase or multi-phase zirconium boride layer is formed nearby. Boring treatment significantly improves wear resistance and corrosion resistance. The depth of the boriding layer is preferably about several μm to 300 μm, and the shape of the mold is 5 to 100 mm in diameter and 5 mm in thickness.
A cylindrical shape of ~100mm is common.
以下、実施例と比較例をあげてさらに具体的に
説明する。
Hereinafter, a more specific explanation will be given with reference to Examples and Comparative Examples.
実施例
金属ジルコニウムをAr雰囲気中、1650℃、１
時間HIP成形して金属ジルコニウムを主成分とす
る焼結体を得た。それを20×20×10tmmの板状に
加工しその表面をRmax0.02μmの表面粗さにダ
イヤモンド砥粒を用いて研磨した。Example Metal zirconium was heated at 1650°C in an Ar atmosphere.
A sintered body containing metallic zirconium as a main component was obtained by time HIP forming. It was processed into a plate shape of 20 x 20 x 10 tmm, and its surface was polished to a surface roughness of Rmax 0.02 μm using diamond abrasive grains.
次にそれを以下のようにして硼化処理を溶融塩
法で行なつた。すなわち、ステンレス
（SUS304）製の槽に、重量割合で、硼酸20％、
ほう酸カリウム40％、ふつ化ナトリウム15％、炭
酸カリウム15％、Mg粉末10％からなる混合塩中
に上記のHIP処理した金属ジルコニウム焼結体を
浸漬し、そのステンレス槽を箱型電気炉に入れ、
900℃で６時間加熱した。その結果、金属ジルコ
ニウム表面の硼化層の厚みは100μmで硬度は処理
前のHv140からHv1700になつた。 Next, it was borated by the molten salt method as follows. That is, in a stainless steel (SUS304) tank, boric acid 20% by weight,
The above HIP-treated zirconium sintered body was immersed in a mixed salt consisting of 40% potassium borate, 15% sodium fluoride, 15% potassium carbonate, and 10% Mg powder, and the stainless steel bath was placed in a box-shaped electric furnace. ,
Heated at 900°C for 6 hours. As a result, the thickness of the boride layer on the metal zirconium surface was 100 μm, and the hardness increased from Hv140 before treatment to Hv1700.
ガラスとの反応性と転写性を調べるため、重量
割合で、SiO264.9％、B2O32.9％、Na2O5.2％、
K2O15.2％、BaO9.6％、ZnO2.0％からなる硼珪
酸アルカリ系、及びPbO45.1％、SiO245.7％、
Na2O3.6％、K2O5.0％からなる酸化鉛系ガラス
であつて、それぞれ半径10mm、円柱状（高さ５
cm）のガラスを硼化処理した上記の金属ジルコニ
ウムの板の上に置き、N2雰囲気で700℃の温度で
加熱した。冷却後に型とガラスの表面組織を光学
顕微鏡により観察し反応性及び転写性を評価した
ところ、型のガラスとの融着及び損傷はなく、転
写性も良好であつた。 In order to examine the reactivity and transferability with glass, the weight percentages were: SiO 2 64.9%, B 2 O 3 2.9%, Na 2 O 5.2%,
Borosilicate alkaline system consisting of K 2 O 15.2%, BaO 9.6%, ZnO 2.0%, and PbO 45.1%, SiO 2 45.7%,
Lead oxide glass consisting of 3.6% Na 2 O and 5.0% K 2 O, each with a radius of 10 mm and a cylindrical shape (height 5
cm) of glass was placed on the above-mentioned borided metallic zirconium plate and heated at a temperature of 700 °C in an N 2 atmosphere. After cooling, the surface structures of the mold and the glass were observed using an optical microscope and the reactivity and transferability were evaluated. As a result, there was no fusion or damage to the mold and the glass, and the transferability was good.
さらに、型の上にガラスを置き、700℃に加熱
した時点で硼化処理した金属ジルコニウムのもう
一方の同形の板を50Kg／cm2の圧力で軟化したガラ
スをプレスする操作を100回繰り返した後型の反
応性と転写性を光学顕微鏡で評価したところ、い
ずれも問題のないことを確認した。 Furthermore, the glass was placed on the mold, and when it was heated to 700°C, another plate of the same shape made of borated metallic zirconium was pressed against the softened glass at a pressure of 50 kg/cm 2. This operation was repeated 100 times. When the reactivity and transferability of the latter mold were evaluated using an optical microscope, it was confirmed that there were no problems with either.
比較例
比較材として、Si3N4焼結体、SiC焼結体及び
金属MoをHIP処理後実施例と同様に硼化処理し
た焼結体を用い同様の試験を行つたところ、
Si3N4焼結体とSiC焼結体はガラスと反応して発
泡現象が見られ、Mo焼結体では転写性に劣るこ
とが判つた。Comparative Example As comparative materials, similar tests were conducted using Si 3 N 4 sintered bodies, SiC sintered bodies, and sintered bodies in which metal Mo was subjected to HIP treatment and then borided in the same manner as in the examples.
It was found that the Si 3 N 4 sintered body and the SiC sintered body reacted with glass and a foaming phenomenon was observed, and that the Mo sintered body had poor transferability.
本発明のガラス成形用型は従来用いられてきた
材質のものに比べてガラスとの反応性と転写性及
びくり返し使用回数による耐久性にすぐれてい
る。
The glass molding mold of the present invention has excellent reactivity with glass, transferability, and durability against repeated use compared to those made of conventionally used materials.
Claims (1)
ムを主成分とする基材からなり、その少なくとも
ガラス成形面表層には硼化物層を形成させてなる
ことを特徴とするガラス成形用型。1. A glass molding mold comprising a base material mainly composed of metallic zirconium formed by hot isostatic pressing, and having a boride layer formed on at least the surface layer of the glass molding surface thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31940588A JPH02164728A (en) | 1988-12-20 | 1988-12-20 | Mold for molding glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31940588A JPH02164728A (en) | 1988-12-20 | 1988-12-20 | Mold for molding glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02164728A JPH02164728A (en) | 1990-06-25 |
| JPH0579609B2 true JPH0579609B2 (en) | 1993-11-04 |
Family
ID=18109821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31940588A Granted JPH02164728A (en) | 1988-12-20 | 1988-12-20 | Mold for molding glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02164728A (en) |
-
1988
- 1988-12-20 JP JP31940588A patent/JPH02164728A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02164728A (en) | 1990-06-25 |
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