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. 19, 2015
Filed:
Apr. 06, 2012
Koji Obayashi, Toyoake, JP;
Daisuke Kasai, Kata, JP;
Keita Taguchi, Agi, JP;
Takaaki Ogiso, Anjo, JP;
Tsutomu Sato, Anjo, JP;
Koji Obayashi, Toyoake, JP;
Daisuke Kasai, Kata, JP;
Keita Taguchi, Agi, JP;
Takaaki Ogiso, Anjo, JP;
Tsutomu Sato, Anjo, JP;
AISIN AW CO., LTD., Anjo, JP;
Abstract
A manufacturing method for a composite steel part including manufacturing a first steel part by preparing an intermediate product in which an extra portion is added, and heating the intermediate product to an austenitizing temperature in a carburizing atmosphere to form a carburized layer, cooling the intermediate product at a rate less than a cooling rate at which martensitic transformation is caused and in which the intermediate product is cooled to a temperature equal to or less than a temperature at which structure transformation due to the cooling is completed, heating the intermediate product to an austenitizing range by high-density energy and thereafter cooled at a rate equal to or more than the cooling rate at which martensitic transformation is caused to form a carburized quenched portion, cutting the extra portion of the intermediate product, and welding the first steel part and the second steel part to each other.