Title:
A steel part article and a manufacturing method for the same
Document Type and Number:
Japanese Patent JP6275821
Kind Code:
B2
Abstract:
A surface of a steel material cut to a desired shape and carbonitrided is heated by excitation and thereafter repeatedly heated/cooled a predetermined number of times, such that an ultrafine crystal layer is formed immediately under the surface of the steel material and at least a predetermined number of cracks are formed under the formed ultrafine crystal layer, thereby enabling to increase toughness of the surface or immediately thereunder and enhance tenacity and inhibiting growth of cracks.
Inventors:
Kenji Matsumoto
Application Number:
JP2016507787A
Publication Date:
February 07, 2018
Filing Date:
March 11, 2015
Export Citation:
Assignee:
Honda motor industry stock company
International Classes:
C21D7/04; C21D1/06; C21D7/06; C23C8/80
Domestic Patent References:
| JP2009014167A | ||||
| JP11347944A | ||||
| JP2004339575A | ||||
| JP2007297651A |
Foreign References:
| WO2007102280A1 |
Attorney, Agent or Firm:
Yutaka Yoshida
Ryuichi Nishimura
Ryuichi Nishimura
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