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:
Jun. 05, 2012
Filed:
Jun. 23, 2008
Tomokazu Masuda, Kobe, JP;
Takehiro Tsuchida, Kobe, JP;
Masaki Shimamoto, Kobe, JP;
Motohiro Horiguchi, Kobe, JP;
Shinsuke Masuda, Kobe, JP;
Koichi Akazawa, Kobe, JP;
Shogo Murakami, Kobe, JP;
Mutsuhisa Nagahama, Kobe, JP;
Hiroshi Yaguchi, Kobe, JP;
Koichi Sakamoto, Kobe, JP;
Tomokazu Masuda, Kobe, JP;
Takehiro Tsuchida, Kobe, JP;
Masaki Shimamoto, Kobe, JP;
Motohiro Horiguchi, Kobe, JP;
Shinsuke Masuda, Kobe, JP;
Koichi Akazawa, Kobe, JP;
Shogo Murakami, Kobe, JP;
Mutsuhisa Nagahama, Kobe, JP;
Hiroshi Yaguchi, Kobe, JP;
Koichi Sakamoto, Kobe, JP;
Kobe Steel, Ltd., Kobe-shi, JP;
Abstract
The present invention provides a steel for machine and structural use which is capable of maintaining mechanical characteristics such as strength by reducing a S content as well as of exhibiting excellent machinability (particularly tool life) in intermittent cutting (such as hobbing) with the high speed tool, and a method useful for producing the steel for machine and structural use. The steel for machine and structural use according to the invention secures 0.002% or more of solute N in the steel and has a chemical composition which is appropriately adjusted and satisfies a relationship of the following expression (1): (0.1×[Cr]+[Al])/[O]≧150 . . . (1), in which [Cr], [Al], and [0] represent a Cr content (mass %), an Al content (mass %), and an O content (mass %), respectively.