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:
Feb. 17, 2015
Filed:
Apr. 06, 2012
Koji Obayashi, Toyoake, JP;
Mamoru Takeuchi, Kariya, JP;
Ryuta Sugiyama, Anjo, JP;
Ken Shimizu, Toyota, JP;
Koichi Kato, Anjo, JP;
Koji Obayashi, Toyoake, JP;
Mamoru Takeuchi, Kariya, JP;
Ryuta Sugiyama, Anjo, JP;
Ken Shimizu, Toyota, JP;
Koichi Kato, Anjo, JP;
Aisin AW Co., Ltd., Anjo, JP;
Abstract
A manufacturing method for a composite steel part including preparing an intermediate product in which an extra portion, which has a thickness equal to or more than that of a carburized layer to be formed in a subsequent carburizing step, has been added to a welding expected portion, carburizing the intermediate product by heating to an austenitizing temperature or more in a carburizing atmosphere, then cooling the intermediate product at a cooling rate less than a rate at which martensitic transformation occurs and without completing structural transformation due to the cooling, quenching a portion of the intermediate product after heating to an austenitizing range by high-density energy and thereafter cooling to cause martensitic transformation to form a carburized quenched portion, removing an extra portion of the intermediate product; and then welding a second steel part to the welding expected portion.