公开(公告)号：US20180155816A1

公开(公告)日：2018-06-07

申请号：US15569988

申请日：2016-04-27

Applicant: KEIO UNIVERSITY ,  NETUREN CO., LTD.

Inventor： Jun KOMOTORI ,  Shumpei OTA ,  Kengo FUKAZAWA ,  Yoshitaka MISAKA ,  Kazuhiro KAWASAKI

IPC: C23C8/24

CPC classification number: C23C8/24 ,  C21D1/06 ,  C23C8/02

Abstract: An object of the present invention is to provide, as a simple method, a surface nitriding treatment method of a titanium material, forming a hardened nitrided layer excellent in abrasion resistance on the surface of a titanium material in a shorter time. In order to achieve the object, the present invention adopts a surface nitriding treatment method of a titanium material, wherein a hardened nitrided layer is formed on the surface of the titanium material, by blowing nitrogen gas at a flow rate of 10 L/min or more to the surface of the titanium material while the titanium material is being heated to 800° C. to 1000° C. in an inert gas atmosphere.