【発明の詳細な説明】[Detailed description of the invention]
（産業上の利用分野）
本発明は電子、電気機器用ケース類の外、建築
用外装材、車輌用装飾材のようなアンモニア雰囲
気に対する耐食性が要求される材料や海水に対す
る耐食性が要求される海洋機器の外装材等に適し
た鉄鋼母材と銅合金材の合せ材に関するものであ
る。
（従来技術）
鉄鋼母材と通常の銅合金材の合せ材は他の金属
のクラツド材と同様爆発圧着或いは熱間圧着、冷
間圧着などによつて接合して提供できるが、この
合せ材は圧延によつて展伸させようとすると、鉄
鋼母材と銅合金材の変形抵抗の差異によつて各材
料が不均一に変形し、剥離を来すものであつて、
従つて、展伸加工した薄い合せ材は幾多の用途が
考えられるも拘らずその工業的な提供を困難とさ
れているのが現状である。
（発明の目的）
本発明は前記のような従来困難視されたところ
を解決するためになされたものである。
（発明の構成）
本発明はベリリウム0.01〜2.0重量％、すず1.0
〜9.0重量％、ニツケル1.0〜30.0重量％、残部銅
よりなる銅合金材を鉄鋼母材に接合、展伸加工し
てなるものである。
本発明において鉄鋼母材に接合する銅合金材は
その組成を特にベリリウム0.01〜2.0重量％、す
ず1.0〜9.0重量％、ニツケル1.0〜30.0重量％、残
部銅としたものであつて、このような銅合金材は
鉄鋼母材に爆発圧着或いは熱間圧着、冷間圧着な
どによつて容易に接合されるものであるが、この
接合したものは圧延によつて展伸加工されても各
材料の剥離を来すことなく薄い合せ材となるもの
であつて、これは前記のような組成よりなる銅合
金材の展伸加工時における変形抵抗が鉄鋼部材の
それと近似なことによつて伸び率が合うとともに
各材料相互間の接合力の低下が特に起らない結果
によるものと推察される。しかし、前記銅合金材
の組成において、ベリリウム0.01重量％未満であ
つたりすずが1.0重量％未満であつたり或いはニ
ツケルが1.0重量％未満であれば、鉄鋼母材との
接合性が低下して圧延による展伸加工の際に剥離
を来し、また、ベリリウムが2.0重量％を超えた
りすずが9.0重量％を超えたり或いはニツケルが
30.0重量％を超えると、硬さが過大となつて圧延
による展伸加工の際に鉄鋼母材の伸び率と合わな
いこととなつて剥離を来すものである。即ち、本
発明における前記銅合金材の組成は幾多の研究、
実験の結果に基いたものであつて、該組成以外で
は所期の鉄鋼母材と銅合金材の合せ材とはならな
いものである。
次に、通常の銅合金材を鉄鋼母材に接合した合
せ材と、本発明に係る合せ材との熱間圧延時およ
び冷間圧延時の剥離性の試験結果を次表に示す。
(Industrial Application Field) The present invention is applicable to materials that require corrosion resistance against ammonia atmosphere, such as cases for electronic and electrical equipment, architectural exterior materials, and vehicle decoration materials, and marine materials that require corrosion resistance against seawater. This invention relates to a composite material of steel base material and copper alloy material suitable for exterior materials of equipment, etc. (Prior art) A laminate of a steel base material and a normal copper alloy material can be bonded and provided by explosive crimping, hot crimping, cold crimping, etc. in the same way as other metal cladding materials, but this cladding material When attempting to expand by rolling, each material deforms unevenly due to the difference in deformation resistance between the steel base material and the copper alloy material, resulting in peeling.
Therefore, although thin stretched laminates have many potential uses, it is currently difficult to provide them industrially. (Object of the Invention) The present invention has been made in order to solve the above-mentioned problems that have been considered difficult in the past. (Structure of the Invention) The present invention consists of 0.01 to 2.0% by weight of beryllium and 1.0% by weight of tin.
A copper alloy material consisting of ~9.0% by weight, 1.0~30.0% by weight of nickel, and the balance copper is bonded to a steel base material and stretched. In the present invention, the copper alloy material to be joined to the steel base material has a composition of 0.01 to 2.0% by weight of beryllium, 1.0 to 9.0% by weight of tin, 1.0 to 30.0% by weight of nickel, and the balance is copper. Copper alloy materials are easily joined to steel base materials by explosive crimping, hot crimping, cold crimping, etc., but even if the bonded material is stretched by rolling, the characteristics of each material It forms a thin laminate without peeling, and this is because the deformation resistance of the copper alloy material with the composition described above during stretching is similar to that of steel members, so the elongation rate is low. This is presumed to be due to the fact that there is no particular decrease in bonding strength between the materials as they fit together. However, if the composition of the copper alloy material is less than 0.01% by weight of beryllium, less than 1.0% by weight of tin, or less than 1.0% by weight of nickel, the bondability with the steel base material will decrease and rolling Peeling occurs during the stretching process, and beryllium exceeds 2.0% by weight, tin exceeds 9.0% by weight, or nickel exceeds 2.0% by weight.
If it exceeds 30.0% by weight, the hardness becomes excessively high and the elongation rate does not match that of the steel base material during stretching by rolling, resulting in peeling. That is, the composition of the copper alloy material in the present invention has been determined by numerous studies,
This is based on the results of experiments, and any composition other than the above will not result in the intended combination of steel base material and copper alloy material. Next, the following table shows the test results of peelability during hot rolling and cold rolling of a laminated material made of a common copper alloy material joined to a steel base material and a laminated material according to the present invention.
【表】【table】
【表】
なお、銅合金材は1.5mm厚さの圧延板を700℃で
30分焼鈍したものを使用し、鉄鋼母材（軟鋼板
SB―42）は20mm厚さのものを使用した。
このような本発明の係る鉄鋼母材と銅合金材の
合せ材は、時効硬化性であつて合せ材とした後に
300〜500℃で時効処理を施すことにより、
HRC25〜40の高硬度となり、機械的強度に優れ
たものとなるうえにアンモニア雰囲気に対して耐
食性が優れたものであり、また、ベリリウム、す
ずという強い酸化膜生成元素を有しているので強
固で緻密な表面被膜が形成されて一般のCu―Ni
合金に比べて耐食性および耐摩耗性に優れてい
る。しかも、ベリリウムが加えられていることに
よつて一般のCu―Ni合金に比べて製造工程が容
易化されるうえに加工性もよく、また、すずとニ
ツケルが使用されているのではんだ付け性もよく
て他材料の接合性もよいものであり、その色沢は
ステンレス鋼のような白色で美観を備えている。
従つて、薄板或いは管、棒、線などの何れに展伸
加工されたものであつても被覆層を形成している
銅合金材の耐食性を利用して各種産業分野におけ
る構造材として或いは加工品として被覆層の剥離
おそれなく広く有効に使用できるものであつて、
例えば電子、電気機器用ケースのようなはんだ付
け加工を要する耐久性容器やサイジング材、屋根
瓦、雨樋、ドア、表札などの大気中のアンモニア
により腐食され易い建築用材、車体関係、屋外機
器用ケース類の外、船体、海底ケーブルその他海
水中で使用する各種構造材などに広く有効に使用
することができる。また、銅合金材よりなる被覆
層および鉄鋼母材の表面にそれぞれの材質に適応
した加工をすることによつてより広く利用もでき
る。さらに、本発明に係る鉄鋼母材と銅合金材の
合せ材は横に並べて当接できる厚さであれば、当
接させた個所において鉄と銅合金とのいりまじり
がなく溶接ができるものであつて、従つて、通常
の銅合金材と鉄鋼母材の合せ材を同様に溶接する
場合に鉄鋼と銅合金とが当接個所でいりまじつて
耐食性が劣化するという現象はなく、溶接を加味
した用途面にも有効に使用できるものである。
実施例
ベリリウム0.54重量％、すず6.3重量％、ニツ
ケル20.5重量％、残部銅よりなる縦20cm、横10
cm、厚さ0.16cmの板状の銅合金材を炭素0.2重量
％、シリコン0.20重量％、マンガン0.5重量％、
残部鉄よりなる縦20cm、横10cm、厚さ２cmの板状
の鉄鋼母材に爆発圧着により接合したうえ圧延に
より展伸加工して鉄鋼母材の厚さ450μ、銅合金
材の厚さ50μの合せ材とした。
（発明の効果）
本発明は前記説明から明らかなように、耐食
性、耐摩耗性に優れているうえ美観を備えてお
り、しかも、銅合金が鉄鋼母材より剥離すること
のないもので、製造、加工も容易で安価に提供で
きる利点と相まち業界の発展に寄与するところ極
めて大なものである。[Table] Copper alloy materials are rolled plates with a thickness of 1.5 mm at 700℃.
The steel base material (mild steel plate) was annealed for 30 minutes.
SB-42) was used with a thickness of 20 mm. Such a laminated material of steel base material and copper alloy material according to the present invention is age hardenable and after being made into a laminated material,
By aging at 300-500℃,
It has a high hardness of HRC25-40, has excellent mechanical strength, and has excellent corrosion resistance in an ammonia atmosphere.It is also strong because it contains strong oxide film-forming elements such as beryllium and tin. A dense surface film is formed on ordinary Cu-Ni.
Superior corrosion and wear resistance compared to alloys. Moreover, the addition of beryllium makes the manufacturing process easier and easier to work with than ordinary Cu-Ni alloys, and the use of tin and nickel also improves solderability. At best, it has good bonding properties with other materials, and its color is white and beautiful, like stainless steel.
Therefore, whether it is a thin plate, a tube, a rod, a wire, etc. that has been expanded, the corrosion resistance of the copper alloy material that forms the coating layer can be used as a structural material in various industrial fields or as a processed product. It can be used widely and effectively without fear of peeling of the coating layer,
For example, durable containers and sizing materials that require soldering such as cases for electronic and electrical equipment, construction materials that are easily corroded by ammonia in the atmosphere such as roof tiles, rain gutters, doors, nameplates, car bodies, and outdoor equipment. It can be effectively used in a wide range of applications, including cases, ship hulls, submarine cables, and other structural materials used underwater. Further, by processing the coating layer made of a copper alloy material and the surface of the steel base material to suit each material, it can be used more widely. Furthermore, as long as the combined material of the steel base material and the copper alloy material according to the present invention has a thickness that allows them to be brought into contact with each other side by side, welding can be performed without mixing the iron and the copper alloy material at the places where they are brought into contact. Therefore, when a normal copper alloy material and a steel base material are welded in the same way, there is no phenomenon where the steel and copper alloy come into contact at the contact point and the corrosion resistance deteriorates. It can also be effectively used in various applications. Example 0.54% by weight of beryllium, 6.3% by weight of tin, 20.5% by weight of nickel, balance copper, length 20 cm, width 10
cm, 0.16 cm thick plate-shaped copper alloy material with carbon 0.2% by weight, silicon 0.20% by weight, manganese 0.5% by weight,
It was joined by explosive crimping to a plate-shaped steel base material of 20 cm length, 10 cm width, and 2 cm thickness, which was made of residual iron, and was then stretched by rolling to form a steel base material with a thickness of 450 μm and a copper alloy material with a thickness of 50 μm. It was used as a laminating material. (Effects of the Invention) As is clear from the above description, the present invention has excellent corrosion resistance and abrasion resistance, and is aesthetically pleasing.Moreover, the copper alloy does not peel off from the steel base material. It has the advantage of being easy to process and can be provided at low cost, making it an extremely important contribution to the development of the industry.