Title:
HIGH PROOF STRESS AND HIGHLY DUCTILE CAST IRON AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JP3823347
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To produce cast iron combining high proof stress and high ductility and to provide a method for producing the same.
SOLUTION: This cast iron has a compsn. contg., by weight, 3.0 to 4.0% C, 1.0 to 3.0% Si, 0.1 to 1.2% Mn, ≤0.1% P, ≤0.02% S, 0.7 to 1.5% Cu, 0.015 to 0.06% Mg, and the balance Fe with inevitable impurities, has a structure in which graphite is crystallized out in a fine ferrite base structure obtd. by tempering quenched martensite and may contain Ni, and the cast iron stock having the above optimum compsn. and componental ranges is subjected to austenitizing treatment, is thereafter quenched and is subjected to tempering treatment at 640 to 710°C.
Inventors:
Katsuhiko Furushiro
Teshima Shigeru
Teshima Shigeru
Application Number:
JP28272495A
Publication Date:
September 20, 2006
Filing Date:
October 31, 1995
Export Citation:
Assignee:
Hitachi Metals Co., Ltd.
International Classes:
C22C37/04; C21D5/00; (IPC1-7): C22C37/04
Domestic Patent References:
| JP63058881B2 | ||||
| JP60177125A | ||||
| JP50127824A | ||||
| JP4061047B2 | ||||
| JP3104841A |
Attorney, Agent or Firm:
Aperture Muneaki