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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.:

US 8932416 B1

PDFFull Text
Expired
Date of Patent:
Jan. 13, 2015

Filed:

May. 26, 2010

High-strength and high-ductility die-quenched parts and method of manufacturing the same

Applicants:

Eizaburou Nakanishi, Kanagawa, JP;

Masayuki Miyake, Kanagawa, JP;

Kotobu Nagai, Ibaraki, JP;

Masao Hayakawa, Ibaraki, JP;

Takehito Itagaki, Ibaraki, JP;

Takahiko Kanai, Tokyo, JP;

Munehisa Hatta, Tokyo, JP;

Kazuhiro Kawasaki, Tokyo, JP;

Inventors:

Eizaburou Nakanishi, Kanagawa, JP;

Masayuki Miyake, Kanagawa, JP;

Kotobu Nagai, Ibaraki, JP;

Masao Hayakawa, Ibaraki, JP;

Takehito Itagaki, Ibaraki, JP;

Takahiko Kanai, Tokyo, JP;

Munehisa Hatta, Tokyo, JP;

Kazuhiro Kawasaki, Tokyo, JP;

Assignees:

Nissan Motor Co., Ltd., Yokohama-shi, JP;

National Institute for Materials Science, Ibaraki, JP;

Neturen Co., Ltd, Tokyo, JP;

Attorney:

Westerman, Hattori, Daniels & Adrian, LLP

Primary Examiner:

Jie Yang

Int. Cl.
CPC ...
C21D 9/00 (2006.01); B21D 22/02 (2006.01); B21D 22/20 (2006.01); B21D 37/16 (2006.01); C21D 1/42 (2006.01); C22C 38/18 (2006.01); C22C 38/22 (2006.01);
U.S. Cl.
CPC ...
B21D 22/02 (2013.01); B21D 22/20 (2013.01); B21D 37/16 (2013.01); C21D 1/42 (2013.01); C21D 9/00 (2013.01); C21D 2211/008 (2013.01); C22C 38/18 (2013.01); C22C 38/22 (2013.01);
Abstract

A high-strength die-quenched partis formed by heating a high-strength steel sheetup to an austenite region, hot stamping and cooling inside a mold, and its microstructure has the martensite wherein carbide particlesare finely dispersed over an entire region including prior-austenite grain boundaries. It is desirable that the prior-austenite grain size in the microstructure of the high-strength steel sheet, which is a base material, be 10 μm or smaller. The high-strength die-quenched part has high-strength and high-ductility thanks to its martensite.

Find Patent Forward Citations

Nakanishi, Eizaburou. (2015). High-strength and high-ductility die-quenched parts and method of manufacturing the same (U.S. Patent No. 8932416). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8932416

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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