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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 9254626 B1

PDFFull Text
Date of Patent:
Feb. 09, 2016

Filed:

Sep. 16, 2013

Bonded object of tungsten carbide-based superhard alloy and process for producing same

Applicant:

Ngk Insulators, Ltd., Nagoya, JP;

Inventors:

Hironori Takahashi, Nagoya, JP;

Hiroyuki Tanaka, Nagoya, JP;

Assignee:

NGK Insulators, Ltd., Nagoya, JP;

Attorney:

Burr & Brown, PLLC

Primary Examiner:

Humera Sheikh

Assistant Examiner:

Seth Dumbris

Int. Cl.
CPC ...
B32B 15/04 (2006.01); B23K 1/00 (2006.01); B23K 20/00 (2006.01); B23P 15/24 (2006.01); B28B 3/26 (2006.01); B32B 15/18 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/18 (2006.01); B23K 35/30 (2006.01); B23K 35/02 (2006.01); C21D 1/74 (2006.01); C21D 1/18 (2006.01); C23C 8/20 (2006.01); C23C 8/80 (2006.01); C22C 29/08 (2006.01);
U.S. Cl.
CPC ...
B32B 15/043 (2013.01); B23K 1/0008 (2013.01); B23K 20/00 (2013.01); B23K 35/0233 (2013.01); B23K 35/302 (2013.01); B23P 15/243 (2013.01); B28B 3/269 (2013.01); B32B 15/04 (2013.01); B32B 15/18 (2013.01); C21D 1/18 (2013.01); C21D 1/74 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/18 (2013.01); C23C 8/20 (2013.01); C23C 8/80 (2013.01); B22F 2998/00 (2013.01); B23K 2201/02 (2013.01); B23K 2201/20 (2013.01); B23K 2203/04 (2013.01); B23K 2203/16 (2013.01); B23K 2203/18 (2013.01); B32B 2307/536 (2013.01); C21D 2211/008 (2013.01); C22C 29/08 (2013.01); C22C 2204/00 (2013.01); Y10T 428/1234 (2015.01); Y10T 428/1284 (2015.01);
Abstract

The present invention provides a bonded tungsten carbide-based super hard alloy assembly equipped with a first metal member comprised of a steel material having a martensite structure, and defining a first bonding surface and a second metal member comprised of a tungsten carbide-based super hard alloy and defining a second bonding surface directly bonded to the first bonding surface of the first metal member. The martensite structure-containing steel material constituting the first metal member is a stainless steel having an average carbon concentration of 0.10 to 0.40 mass %. The first metal member has a high carbon concentration region at a depth ranging from 0.70 to 3.00 mm from the first bonding surface. The high carbon concentration region has a maximum carbon concentration of 0.3 to 1.2 mass %.

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