Title:
SURFACE-MODIFIED STEEL AND PRECISION CASTING METHOD FOR CASTING HAVING MODIFIED SURFACE
Document Type and Number:
Japanese Patent JP2010105022
Kind Code:
A
Abstract:
To provide a surface-modified steel having a thick modified layer with a thickness of 1 mm which is free from defects in the surface part and in which carbon and silicon are enriched, and to provide a precise casting method which can obtain cast iron and a cast steel product having the modified layer and having excellent dimensional precision.
There is provided the surface modified steel, wherein the base part has a composition comprising, by mass, 3.9% C, 3.1% Si, 2.5% Mn, 0.8% P and 0.15% S, and the balance iron (Fe) with inevitable impurities, and the composition of the surface part is enriched in C: higher than the C% of the base part to 5.0%, and Si: higher than the Si% of the base part to 6.0%.
Inventors:
HANABUSA TATSUO
OISHI IKUMI
SAKAMURA MASARU
MIZUNARI SHIGETOSHI
ENDO EIJI
ASARI NORIKAZU
OISHI IKUMI
SAKAMURA MASARU
MIZUNARI SHIGETOSHI
ENDO EIJI
ASARI NORIKAZU
Application Number:
JP2008280424A
Publication Date:
May 13, 2010
Filing Date:
October 30, 2008
Export Citation:
Assignee:
HIROSHIMA PREFECTURE
CASTEM ENGINEERING KK
CASTEM ENGINEERING KK
International Classes:
B22C7/02; B22C3/00; B22C9/04; C22C37/00
Attorney, Agent or Firm:
Tsurugame Kuniyasu