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Title:
HOT-FORGED COMPONENT HAVING EXCELLENT FRACTURE SPLITTABILITY
Document Type and Number:
Japanese Patent JP2010270358
Kind Code:
A
Abstract:

To provide a hot-forged component which can exhibit satisfactory fracture splittability even in the case the contents of C, V and P are reduced.

The hot-forged component having excellent fracture splittability has a chemical component composition comprising, by mass, 0.27 to 0.50% C, 0.10 to 2.0% Si, 0.5 to 1.5 Mn, 0.015 to 0.07% P, 0.01 to 0.2% S, 0.10 to 1.0% Cr, 0.03 to <0.20% V, 0.015 to 0.1% Ti, ≤0.05% (excluding 0%) Al and the balance iron with inevitable impurities, and in which the total area ratio of a ferritic structure and a pearlitic structure is ≥90% to the whole structure, and further, (ferrite grain size number F)-(old austenite grain size number A)≥3 is satisfied.


Inventors:
MATSUGASAKO AKIHIRO
ANAMI GORO
KONDO TAKAAKI
YAMADA YUICHI
MURAKAMI YOICHI
Application Number:
JP2009000122225
Publication Date:
December 02, 2010
Filing Date:
May 20, 2009
Export Citation:
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Assignee:
KOBE STEEL LTD
NISSAN MOTOR
International Classes:
C22C38/00; B21J5/00; B21J5/02; B21K1/14; C22C38/34; C22C38/60; F02B77/00
Domestic Patent References:
JP4264460B12009-05-20
Attorney, Agent or Firm:
植木 久一
菅河 忠志
伊藤 浩彰
植木 久彦