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:
Oct. 02, 2018
Filed:
May. 07, 2012
Naoyuki Sano, Takarazuka, JP;
Tatsuya Hasegawa, Kitakyushu, JP;
Naoyuki Sano, Takarazuka, JP;
Tatsuya Hasegawa, Kitakyushu, JP;
NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;
Abstract
Non-post-heat treated steel contains: in mass %, C: 0.27 to 0.40%, Si: 0.15 to 0.70%, Mn: 0.55 to 1.50%, P: 0.010 to 0.070%, S: 0.05 to 0.15%, Cr: 0.10 to 0.60%, V: 0.030% or more and less than 0.150%, Ti: more than 0.10%, not more than 0.200%, Al: 0.002 to 0.050%, and N: 0.002 to 0.020%, and optionally one or more of Cu≤0.40% and Ni≤0.30%; the balance being Fe and impurities, wherein [Ti]−3.4[N]−1.5[S]<0, and 0.60<[C]+([Si]/10)+([Mn]/5)+(5[Cr]/22)+(33[V]/20) −(5[S]/7)<0.80. The steel can be used to make a high fatigue strength connecting rod for automobile engines which is fracture-split from a hot forged shape. The non-post-heat treated steel member can have vEof 1.0 to 7.0 J/cm, and σw≥450 MPa.