高周波焼入れ用非調質鋼 - Nippon Steel & Sumitomo Metal Corporation

Title:

高周波焼入れ用非調質鋼

Document Type and Number:

Japanese Patent JP5304507

Kind Code:

B2

Abstract:

To provide a non-heat treated steel for induction hardening in which melting cracks caused in the case heating temperature for performing induction hardening is made high can be suppressed, and further, which can impart high fatigue strength to a machine structural component such as a crank shaft.

The non-heat treated steel for induction hardening has a composition containing 0.35 to 0.45% C, >0.30 to 0.70% Si, 1.00 to 1.50% Mn, ≤0.030% P, 0.010 to 0.035% S, 0.10 to 0.30% Cr, 0.005 to 0.050% Al, 0.100 to 0.200% V and 0.0040 to 0.0200% N, wherein the value expressed by expression: [80C2+55C+13Si+4.8Mn+30P+30S+1.5Cr] lies in the range of ≤50, and the value expressed by expression: [C+(Si/10)+(Mn/5)-(5S/7)+(5Cr/22)+1.65V] lies in the range of 0.80 to 1.00, and the balance Fe with impurities.

Inventors:

Matsunaga Kazunori
Hitoshi Matsumoto

Application Number:

JP2009171731A

Publication Date:

October 02, 2013

Filing Date:

July 23, 2009

Export Citation:

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Assignee:

Nippon Steel & Sumitomo Metal Corporation

International Classes:

C22C38/00; C22C38/24; C22C38/28; F16C3/08

Domestic Patent References:

JP9227983A
JP2007144445A
JP6340946A
JP2010265506A
JP1176031A

Attorney, Agent or Firm:

Mikiji Sugioka
Terutada Hogami
Chihara

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