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:
May. 03, 2005
Filed:
Sep. 25, 2003
Yoshihisa Kiyotoki, Hitachinaka, JP;
Mitsuo Chigasaki, Hitachi, JP;
Shizuo Matsushita, Hitachi, JP;
Jiro Kuniya, Hitachi, JP;
Takahiko Kato, Hitachinaka, JP;
Yoshiteru Chiba, Hitachi, JP;
Yoshihisa Kiyotoki, Hitachinaka, JP;
Mitsuo Chigasaki, Hitachi, JP;
Shizuo Matsushita, Hitachi, JP;
Jiro Kuniya, Hitachi, JP;
Takahiko Kato, Hitachinaka, JP;
Yoshiteru Chiba, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In the joint construction of cobalt-based alloy, a cobalt-based alloy layer, in which granular or massive eutectic carbidedisperses, is joined to a metal of a base metalvia an insert metal layer. For the joint construction of cobalt-based alloy, liquid phase diffusion bonding is performed at a temperature of 1100° C. for a retention time of 1 hour with an insert metal with a thickness of about 40 μm being interposed between the base metal, which is S45C carbon steel, and a cobalt-based alloy material which has granular or massive eutectic carbide with a grain size not larger than 30 μm in a matrix of cast structure and contains 1.03 wt % C, 29.73 wt % Cr, 3.86 wt % W, 2.59 wt % Ni, 2.67 wt % Fe, 0.59 wt % Si, and 0.07 wt % Mo, the balance substantially being Co. The cobalt-based alloy layerafter bonding contains granular or massive eutectic carbide.