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:
Sep. 25, 2012
Filed:
Jan. 20, 2009
Koichi Sakamoto, Kobe, JP;
Motohiro Horiguchi, Kobe, JP;
Shogo Murakami, Kobe, JP;
Hiroshi Yaguchi, Kobe, JP;
Shinsuke Masuda, Kobe, JP;
Koichi Akazawa, Kobe, JP;
Koichi Sakamoto, Kobe, JP;
Motohiro Horiguchi, Kobe, JP;
Shogo Murakami, Kobe, JP;
Hiroshi Yaguchi, Kobe, JP;
Shinsuke Masuda, Kobe, JP;
Koichi Akazawa, Kobe, JP;
Kobe Steel, Ltd., Kobe-shi, JP;
Abstract
The present invention provides a steel for machine and structural use which sustains mechanical properties such as strength by reducing S content, and exerts excellent machinability (in particular, tool life) in both of intermittent cutting with HSS tools and continuous cutting with carbide tools. The invention relates to a steel for machine and structural use which contains an oxide inclusion containing, wherein a total mass of an average composition of the oxide inclusions is 100%: CaO: 10 to 55 mass %; SiO: 20 to 70 mass %; AlO: more than 0 and 35 mass % or less; MgO: more than 0 and 20 mass % or less; MnO: more than 0 and 5 mass % or less; and one or more members selected from the group consisting of LiO, NaO, KO, BaO, SrO and TiO: 0.5 to 20 mass % in total.