| 摘要 |
PURPOSE:To provide a composite stainless steel for blade which does not rust, break or bend and has good cutting quality in the stage of joining an austenitic stainless steel to a high C and high Cr martensitic stainless steel by decarburizing beforehand the joining part of the former. CONSTITUTION:A high C and high Cr martensitic stainless steel billt 1 is subjected to a heat treatment for decaburization to form decarburized layers 4, 5 on the surface layer. An austenitic stainless steel 2 is formed on the layer 4 by build-up welding and if necessary, such composite steel is subjected to plastic working, heat treatment, machining or polishing so that the steel 1 is formed to a blade edge part. The C migration to the steel 2 side by welding is thus prevented and the formation of the layer liable to rusting and the brittle layer in the joint part is prevented. |
