发明名称 |
Process for forming a superficial layer having a high hardness by plasma-free thermochemical treatment |
摘要 |
A hard surface layer is formed on a piece of alloy which is reactive with nitrogen, oxygen or carbon, such as titanium or zirconium, by heating the piece to over 650 degrees C in an enclosure where the pressure is no more than 0.1 mbar, then injecting a suitable reactive gas but still maintaining a pressure below atmospheric for a period between a few tens of minutes and 24 hours or more, depending on the layer thickness required. |
申请公布号 |
EP0885980(A3) |
申请公布日期 |
2000.10.11 |
申请号 |
EP19980401235 |
申请日期 |
1998.05.22 |
申请人 |
INNOVATIQUE S.A. |
发明人 |
JACQUOT, PATRICK;FOISSEY, SYLVAIN;VEYSSIERE, GERARD |
分类号 |
C23C8/06;C23C8/20;C23C8/24 |
主分类号 |
C23C8/06 |
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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