The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 15, 2016
Filed:
Dec. 23, 2011
Masayuki Yamada, Yokohama, JP;
Reki Takaku, Yokohama, JP;
Haruki Ohnishi, Yokohama, JP;
Kenichi Okuno, Yokohama, JP;
Kenichi Imai, Yokohama, JP;
Shinji Tanaka, Muroran, JP;
Kazuhiro Miki, Muroran, JP;
Masayuki Yamada, Yokohama, JP;
Reki Takaku, Yokohama, JP;
Haruki Ohnishi, Yokohama, JP;
Kenichi Okuno, Yokohama, JP;
Kenichi Imai, Yokohama, JP;
Shinji Tanaka, Muroran, JP;
Kazuhiro Miki, Muroran, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
THE JAPAN STEEL WORKS, LTD., Tokyo, JP;
Abstract
A heat resistant cast steel containing, in mass %, C: 0.05-0.15, Si: 0.03-0.2, Mn: 0.1-1.5, Ni: 0.1-1, Cr: 8-10.5, Mo: 0.2-1.5, V: 0.1-0.3, Co: 0.1-5, W: 0.1-5, N: 0.005-0.03, Nb: 0.01-0.2, B: 0.002-0.015, Ti: 0.01-0.1, Fe and unavoidable impurities. A method for manufacturing a heat resistant cast steel, the method including melting raw materials to obtain a molten metal, refining and degassing the molten metal, pouring the molten metal into a predetermined mold to form a shape, performing an annealing treatment at a temperature of 1000 to 1150° C., performing a normalizing treatment at a temperature of 1000 to 1200° C., performing a first stage tempering treatment at a temperature of 500 to 700° C., and performing a second stage tempering treatment at a temperature of 700 to 780° C.