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:
Jul. 12, 2011
Filed:
Jun. 03, 2010
Masanao Fujiwara, Aichi, JP;
Hiroaki Yoshida, Aichi, JP;
Masaki Shinkawa, Wako, JP;
Yoshikazu Umeno, Wako, JP;
Toshiaki Otsuka, Wako, JP;
Masanao Fujiwara, Aichi, JP;
Hiroaki Yoshida, Aichi, JP;
Masaki Shinkawa, Wako, JP;
Yoshikazu Umeno, Wako, JP;
Toshiaki Otsuka, Wako, JP;
Daido Steel Co., Ltd., Nagoya, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
Disclosed are a weldable steel of high strength and high toughness and a method of producing members of machine parts. The steel consists essentially of, by weight %, C: 0.10-0.16%, Si: 0.05-0.50%, Mn: 1.3-2.3%, Cu: up to 0.5%, Ni: up to 0.5%, Cr: up to 0.5%, Mo: up to 0.3% and Ti: 0.025-0.035%, and the balance of Fe and inevitable impurities, and satisfying the condition that the weld-cracking susceptibility, Pcm, defined by the formula 1A below is less than 0.35, and the condition that the manganese equivalent, Mneq, defined by the formula 2A below is larger than 2.0.Pcm=C(%)+Si(%)/30+Mn(%)/20+Ni(%)/60+Cr(%)/20+Mo(%)/15+Cu(%)/20  1AMneq=Mn(%)+Cu(%)+Ni(%)/2+Cr(%)+Mo(%)  2A