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. 19, 2005
Filed:
Aug. 16, 2002
Masafumi Zeze, Kitakyushu, JP;
Takashi Morohoshi, Kitakyushu, JP;
Ryusuke Miura, Kitakyushu, JP;
Shintaro Kusunoki, Kitakyushu, JP;
Yasuhiro Kinari, Kitakyushu, JP;
Masayuki Abe, Kitakyushu, JP;
Hiroshi Sugano, Kitakyushu, JP;
Kenichiro Miyamoto, Kitakyushu, JP;
Masaharu Oka, Kitakyushu, JP;
Yuji Koyama, Kitakyushu, JP;
Masafumi Zeze, Kitakyushu, JP;
Takashi Morohoshi, Kitakyushu, JP;
Ryusuke Miura, Kitakyushu, JP;
Shintaro Kusunoki, Kitakyushu, JP;
Yasuhiro Kinari, Kitakyushu, JP;
Masayuki Abe, Kitakyushu, JP;
Hiroshi Sugano, Kitakyushu, JP;
Kenichiro Miyamoto, Kitakyushu, JP;
Masaharu Oka, Kitakyushu, JP;
Yuji Koyama, Kitakyushu, JP;
Nippon Steel Corporation, Tokyo, JP;
Abstract
A cast steel with excellent workability, characterized in that not less than 60% of the total cross section thereof is occupied by equiaxed crystals, the diameters (mm) of which satisfy the following formula:<1.2+0.75,wherein D designates each diameter (mm) of equiaxed crystals in terms of internal structure in which the crystal orientations are identical, and X the distance (mm) from the surface of the cast steel. The cast steel and the steel material obtained by processing the cast steel have very few surface flaws and internal defects.