发明授权
US4799976A Process for the heat treatment of Al alloys containing Li with a view to
preserving their surface health
失效
为了保持其表面健康，含有Li的Al合金的热处理方法
- 专利标题： Process for the heat treatment of Al alloys containing Li with a view to preserving their surface health
- 专利标题（中）： 为了保持其表面健康，含有Li的Al合金的热处理方法
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申请号： US165008申请日： 1988-03-07
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公开(公告)号： US4799976A公开(公告)日： 1989-01-24
- 发明人: Philippe Meyer
- 申请人： Philippe Meyer
- 申请人地址： FRX Paris
- 专利权人： Cegedur Societe de Transformation de l'Aluminum Pechiney
- 当前专利权人： Cegedur Societe de Transformation de l'Aluminum Pechiney
- 当前专利权人地址： FRX Paris
- 优先权： FRX8703581 19870309
- 主分类号： C22F1/04
- IPC分类号： C22F1/04 ; C22F1/00 ; C22F1/02 ; C21D1/74
摘要：
The invention relates to a process for improving the surface condition of Li-containing Al alloy products. According to the process, heating at a temperature exceeding 300.degree. C. takes place in an atmosphere containing, in volume percent, 5 to 98% CO.sub.2, 2.ltoreq.dry air.ltoreq.95% and the remainder water. The process prevents the appearance of surface pitting and reduces the depth of the Li-depleted surface zone.
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