发明名称 |
STEEL MEMBER HAVING NITROGEN COMPOUND LAYER AND PROCESS FOR PRODUCING SAME |
摘要 |
[Problems] To provide a process for production wherein a compound layer formed on a surface of an iron and steel material by nitriding treatment is prevented from being oxidized by induction quenching, so that unevenness in film thickness between different portions of an oxidization-inhibiting film may not easily occur, with the result that a nitrogen-containing compound layer obtained after high-frequency heating may uniformly remain. [Means for solving] A process for duplex heat treatment of combined nitriding treatment and induction quenching treatment on an iron and steel material, further comprising a chemical conversion treatment step for forming a chemical conversion film on a nitrogen compound layer formed on the iron and steel material by the nitriding treatment, after the nitriding treatment and before the induction quenching treatment. |
申请公布号 |
EP2460906(A1) |
申请公布日期 |
2012.06.06 |
申请号 |
EP20100804113 |
申请日期 |
2010.07.28 |
申请人 |
NIHON PARKERIZING CO., LTD. |
发明人 |
KONISHI, TOMOYOSHI;IKEDA, YOSHIHIRO |
分类号 |
C23C8/50;C21D1/06;C21D1/10;C21D1/26;C21D1/78;C23C8/26;C23C8/32;C23C8/38;C23C8/56;C23C8/80;C23C22/12;C23C22/18;C23C22/34;C23C22/73 |
主分类号 |
C23C8/50 |
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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