| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that a surface treatment process for imparting oxidation resistance and abrasion resistance to a steel member such as a shaped member and a cutting tool requires a high material cost, because the substrate material for the steel member needs to have high hardness, and consequently needs to employ a high alloy steel such as SKH-51 which is a tool steel, or a hard metal. SOLUTION: The method for manufacturing the steel member which employs an inexpensive low alloy for the substrate material and is provided with the abrasion resistance and the oxidation resistance comprises the steps of: using the low alloy like carbon steel or malleable cast iron, as the substrate material; forming a film containing a Ti-Al-N, Al-Cr-N or Al-Cr-Si-N film in the outermost layer, which has the oxidation resistance and the heat resistance at a quenching temperature for the substrate material or at a higher temperature, by an arc-type ion plating technique; and quenching a necessary portion to be given the abrasion resistance by local heat treatment such as flame hardening. The surface treatment method for imparting heat resistance and oxidation resistance to the low alloy includes forming a film durable to hardening heat treatment to be performed on the substrate material having the film already formed on the surface. COPYRIGHT: (C)2007,JPO&INPIT
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