Title:
PRODUCTION OF DUAL-PHASE STAINLESS STEEL SPRING
Document Type and Number:
Japanese Patent JP3172561
Kind Code:
B2
Abstract:
PURPOSE: To produce a spring consisting of dual-phase stainless steel of ferrite and martensite and having superior spring characteristics.
CONSTITUTION: A cold rolled strip of a stainless steel having a composition which contains, by weight, 0.01-0.15% C and 10.0-20.0% Cr and where one or ≥2 kinds among 0.10-4.0% Ni, 0.10-4.0% Mn, and 0.10-4.0% Cu are further incorporated into Fe is prepared by means of ordinary hot rolling stage and cold rolling stage. This cold rolled steel strip is subjected to heat treatment consisting of heating up to a two-phase region temp. of ferrite and austenite and rapid cooling, by which a dual-phase steel strip of ferrite and martensite is formed. The dual-phase stainless steel spring can be product by using this steel strip as a stock and working it into the desired spring shape and then applying ageing treatment to the resulting worked part.
Inventors:
Katsuhisa Miyakusu
Yoshihiro Uematsu
Takashi Ikawa
Hiroshi Fujimoto
Yoshihiro Uematsu
Takashi Ikawa
Hiroshi Fujimoto
Application Number:
JP35489491A
Publication Date:
June 04, 2001
Filing Date:
December 21, 1991
Export Citation:
Assignee:
Nisshin Steel Co., Ltd.
International Classes:
C21D6/00; C21D8/02; C21D9/02; C21D9/46; C22C38/00; C22C38/58; (IPC1-7): C21D9/02
Domestic Patent References:
| JP356621A |
Attorney, Agent or Firm:
Kenji Wada