发明名称 |
Vacuum carburizing method |
摘要 |
An improved vacuum carburizing method is provided which is easy to handle or to maintenance and low equipment costs without using hydrogen gas or acetylenic gas. The improved vacuum carburizing method comprises a carburizing treatment of workpieces made from steel material heated to about 900-1100° C. performed by introducing an ethylenee gas as a carburizing gas at a vacuum of 1-10 kPa in a carburizing furnace chamber.
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申请公布号 |
US6187111(B1) |
申请公布日期 |
2001.02.13 |
申请号 |
US19990261168 |
申请日期 |
1999.03.03 |
申请人 |
NACHI-FUJIKOSHI CORP. |
发明人 |
WAKA MASAOMI;KADONO TORU;HARAI SATOSHI;OKADA TETSUYA;IMAI NAOAKI |
分类号 |
C21D1/773;C23C8/22;(IPC1-7):C23C8/22 |
主分类号 |
C21D1/773 |
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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