Title:
窒化高周波焼入れ用鋼及び窒化高周波焼入れ部品
Document Type and Number:
Japanese Patent JP5477111
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a nitrided, induction-hardened component that has good dimensional accuracy and high surface fatigue strength and is excellent in wear resistance, and a steel for nitriding and induction hardening, which serves as a material thereof.SOLUTION: The steel for nitriding and induction hardening comprises, by mass, >0.30% but ≤0.60% C, 0.02-1.90% Si, 0.30-2.00% Mn, >0.50% but ≤1.00% Al, 0.001-0.021% S, 0.001-0.010% N and the balance being Fe and unavoidable impurities, wherein Mn/S is from 70 to 1,500 and Al+Si is ≤2.50%. Preferably, the steel further comprises, by mass, ≤1.60% Cr, and satisfies the relation: 1.9Al+Cr≤2.60%. The steel may comprise one or more elements chosen from Ti, Nb, V, Mo, B, Ni, Cu and Ca. The nitrided, induction-hardened component comprises a base metal having a composition within the range and has a nitrogen concentration of ≥0.4% at a depth of 0.2 mm from its surface.
Inventors:
Senda Senda
Taku Yoshida
Masayuki Hashimura
Taku Yoshida
Masayuki Hashimura
Application Number:
JP2010078619A
Publication Date:
April 23, 2014
Filing Date:
March 30, 2010
Export Citation:
Assignee:
Nippon Steel & Sumitomo Metal Corporation
International Classes:
C22C38/00; C21D1/06; C21D1/10; C21D1/18; C22C38/06; C22C38/58; C23C8/26; C21D9/32; C21D9/40
Domestic Patent References:
| JP7090364A | ||||
| JP2006009145A | ||||
| JP2010270348A |
Foreign References:
| WO2010082454A1 | ||||
| WO2011049006A1 |
Attorney, Agent or Firm:
Shunta Naito
Hisataka Tanaka
Hisataka Tanaka