Ultrafine crystal layer forming method, machine parts with an ultrafine crystal layer which is generated by the ultrafine crystal layer forming method, and the mechanical component manufacturing method for manufacturing the mechanical parts, as well as the nanocrystal layer forming method, the Machine component comprising a nanocrystal layer produced by the nanocrystal layer forming method, and the mechanical component manufacturing method for manufacturing the machine parts

摘要

Providing an ultrafine crystal layer forming method of can and at low cost ultrafine crystal layer, etc., is generated stably on the surface of metal products. In comparison with the workpiece W, to perform the drilling of the hole 1 by the drill D, to produce ultrafine crystal layer C1 and giving Daiibitsu the inner peripheral surface of the hole 1. In this case, and give the plastic working of the true strain at least one or more inner peripheral surface of the hole 1, is maintained at a temperature range below the melting point and Ac1 transformation point or higher material temperature of the machined surface of the one hole. Or, to be maintained at a temperature that does not exceed the Ac1 transformation point. Thus, it is possible and at low cost ultrafine crystal layer C1, it can be generated stably on the inner peripheral surface of the hole 1.