发明名称 |
Tubular profile manufacturing method for passenger vehicle rear axle uses cold-forming of central part of round cross-section steel tube before localised heating and hardening in water |
摘要 |
The manufacturing method uses a round cross-section high-quality steel tube (1), which is subjected to a U-shaped cold-forming process at its central section (c), with localised heating of partial sections of the steel tube to a temperature of between 920 and 960 degrees C, before hardening in water at a temperature above the AC3 point , followed by a temperature of between 240 and 320 degrees C maintained for a duration of at least 20 minutes and subsequent surface hardening.
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申请公布号 |
DE19941993(C1) |
申请公布日期 |
2000.12.14 |
申请号 |
DE19991041993 |
申请日期 |
1999.09.02 |
申请人 |
BENTELER AG |
发明人 |
STREUBEL, WOLFGANG;CHRISTOPHLIEMKE, WIGBERT |
分类号 |
B60G9/04;B21D53/88;B60B35/00;B60G21/05;B60G21/055;C21D1/25;C21D8/10;C21D9/08;C21D9/28;C23C8/10;(IPC1-7):B21D53/90 |
主分类号 |
B60G9/04 |
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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