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Nitrocarburized microalloyed steel member

A non-quenched and tempered steel, soft nitriding technology, applied in the field of non-quenched and tempered steel parts, can solve the problems of increased cost and prolonged operation time

Inactive Publication Date: 2007-08-01
HONDA MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the past, in order to ensure good bending correction, normalizing treatment (so-called normalization treatment) was performed after hot forging to sizing the steel structure and removing deformation, but due to the addition of normalizing treatment, the operation time was prolonged, resulting in cost. increase

Method used

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Embodiment

[0113] Hereinafter, the results of experiments conducted to confirm the effects of the present invention will be described.

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Abstract

A nitrocarburized microalloyed steel member consists of a microalloyed steel that includes a nitrocarburized layer on a surface, a cross-sectional structure of which steel except for the nitrocarburized layer includes a ferrite and pearlite structure. The microalloyed steel mainly consists of Fe and has a composition: C; Si; Mn; S; Cu; Ni; and Cr having fitting content ranges. If the contents of the Cu, the Ni, and the Cr are represented by WCu, WNi, and WCr mass %, respectively, and composition parameters F1 and F2 are 185WCr+50WCu and 8+4WNi+1.5WCu-44WCr, respectively, then the composition parameters F1 and F2 satisfy F1>20 and F2>0.

Description

technical field [0001] The present invention relates to a non-quenched and tempered steel part having a nitrocarburized layer formed on the surface. Background technique [0002] [Patent Document 1] Japanese Unexamined Patent Publication No. 09-030632 [0003] [Patent Document 2] Japanese Unexamined Patent Publication No. 06-128690 [0004] [Patent Document 3] Japanese Unexamined Patent Publication No. 05-279795 [0005] [Patent Document 4] Japanese Unexamined Patent Publication No. 05-279794 [0006] [Patent Document 5] Japanese Unexamined Patent Publication No. 09-324258 [0007] [Patent Document 6] JP-A-2002-226939 [0008] [Patent Document 7] JP-A-2005-264270 [0009] Since crankshafts for vehicles are used in an environment where large torsional loads and bending loads are repeatedly applied, excellent static strength and fatigue strength are required. On the other hand, since it is a large and complex-shaped component, it is generally manufactured from non-quench...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/42C22C38/44C21D11/00
CPCC23C8/32F16C2204/64C22C38/002C22C38/42C22C38/50C22C38/60C22C38/001C22C38/02F16C3/08C22C38/04
Inventor 浅井铁也泷谷善弘天野政树保母诚木村和良高田胜典
Owner HONDA MOTOR CO LTD
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