发明名称 |
Manufacture of a composite tubular product |
摘要 |
For the purpose of introducing an additive into a molten metal bath, a reactive powder is enclosed in a tubular sleeve composed of a metal compatible with the bath. The cross-section of the sleeve is reduced after filling to compact the powder while leaving it porous. The filled sleeve can be formed by profiling a metal strip to a cup-shaped cross-section, metering the powder into the cup-shaped profile, closing the edges of the strip together to enclose the powder, forming the edges to hook together and crimping the hooked edges.
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申请公布号 |
US4486227(A) |
申请公布日期 |
1984.12.04 |
申请号 |
US19820429725 |
申请日期 |
1982.09.30 |
申请人 |
VALLOUREC |
发明人 |
DOUCHY, MICHEL;TRANCHANT, JEAN-LOUIS;JEHAN, MICHEL |
分类号 |
C21C7/04;B22F3/14;B22F3/18;B22F5/12;B22F7/00;B23K35/02;B65B9/06;C21C7/00;C22B9/10;(IPC1-7):C21C7/02 |
主分类号 |
C21C7/04 |
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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