| 摘要 |
PROBLEM TO BE SOLVED: To reduce finish machining man hours by limiting nitriding depth of a vane. SOLUTION: Necessary depth of nitriding is formed and expansion and deformation of dimension is limited by performing finish machining before nitriding a vane 21, performing heat treatment of sintered material in vacuum atmosphere, or nitriding after steam treatment. COPYRIGHT: (C)2006,JPO&NCIPI
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