Title:
STAINLESS STEEL WIRE FOR SPRING EXCELLENT IN COILING PROPERTY AND ITS MANUFACTURE
Document Type and Number:
Japanese Patent JP3533015
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve the drawing lubricity by achieving the nitriding by the molten salt method without using nickel.
SOLUTION: In a manufacturing method of stainless steel wire for spring, islands 3 of a nitrided layer are generated by the crack on the surface of an austenitic stainless steel wire 2, the nitriding of 0.1-10μm in film thickness, and 300-1200Hv in hardness is performed by the molten salt method on the surface of the stainless steel wire for spring and the austenitic stainless steel wire for spring in which the major diameter of the islands 3 is 5-50μm and the amount of the adhered lubricant on the nitrided layer part is 0.05-1.00g/m2, and then, the drawing is performed.
Inventors:
Fujita, Kozo
Yamashita, Shigeki
Kimura, Toshiyuki
Masutani, Hiroshi
Yamashita, Shigeki
Kimura, Toshiyuki
Masutani, Hiroshi
Application Number:
JP24325495A
Publication Date:
May 31, 2004
Filing Date:
September 21, 1995
Export Citation:
Assignee:
SHINKO KOSEN KOGYO KK
International Classes:
B21F35/00; B21C1/00; B21C9/00; C22C38/00; C23C8/50; (IPC1-7): B21C9/00; B21C1/00; C22C38/00; C23C8/50
Attorney, Agent or Firm:
小谷 悦司 （外３名）
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