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:
Feb. 25, 2020
Filed:
Oct. 17, 2014
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Motoki Takasuga, Kitakyushu, JP;
Yusuke Miyakoshi, Kitakyushu, JP;
Tatsuya Hasegawa, Tokyo, JP;
Hideki Matsuda, Wako, JP;
Masashi Kawakami, Wako, JP;
Isamu Saito, Wako, JP;
NIPPON STEEL CORPORATION, Tokyo, JP;
HONDA MOTOR CO., LTD., Tokyo, JP;
Abstract
A rolled steel material for fracture splitting connecting rods consists of, C: 0.30 to 0.40%, Si: 0.60 to 1.00%, Mn: 0.50 to 1.00%, P: 0.04 to 0.07%, S: 0.04 to 0.13%, Cr: 0.10 to 0.30%, V: 0.05 to 0.14%, Ti: more than 0.15% to 0.20% or less, N: 0.002 to 0.020%, and optionally may contain Cu, Ni, Mo, Pb, Te, Ca, and Bi, with the balance being Fe and impurities. fn1, defined by Formula (1), ranges from 0.65 to 0.80. Relative to the V content in the steel material, a V content in coarse precipitates having a particle size of 200 nm or more is 70% or less, and relative to the Ti content in the steel material, a Ti content in the coarse precipitates is 50% or more.1=C+Si/10+Mn/5+5Cr/22+(Cu+Ni)/20+Mo/2+33V/20−5S/7  (1)