发明名称 |
Steel material for colored spring, method for producing colored spring, and colored spring. |
摘要 |
<p>A steel material for colored spring is formed with a metallic deposit on the surface. The metallic deposit contains copper, zinc, and chrome. In an annealing process, copper and zinc diffuse in the deposit to exhibit a gold color tone while chrome is oxidized to exhibit dark gray color tone. The combination of these color tones exhibits a beautiful black color tone which is distinguishable from normal spring. The deposit improves the formability in the spring shaping process. <IMAGE></p> |
申请公布号 |
EP0620292(A2) |
申请公布日期 |
1994.10.19 |
申请号 |
EP19940105799 |
申请日期 |
1994.04.14 |
申请人 |
SHINKO KOSEN KOGYO KABUSHIKI KAISHA |
发明人 |
YAMADA, MASAO;HATTORI, KEIJI;UEKI, HIROFUMI;KUBO, TAKASHI |
分类号 |
B21F35/00;C23C26/00;F16F1/02;(IPC1-7):C23C26/00;F16F1/00;C23C28/00 |
主分类号 |
B21F35/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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