Title:
浸炭鋼部材の製造方法
Document Type and Number:
Japanese Patent JP5842895
Kind Code:
B2
Abstract:
A carburized steel member is manufactured by specific carburizing, cooling, and quenching steps. The steel member contains: C: 0.1% to 0.4%, Si: 0.35% to 3.0%, Mn: 0.1% to 3.0%, P: 0.03% or less, S: 0.15% or less, Al: 0.05% or less, and N: 0.03% or less, and a content of Cr is less than 0.2%, a content of Mo is 0.1 % or less, and remainder is constituted of Fe and unavoidable impurities. A surface layer thereof includes: a first layer having a carbon concentration of 0.60 mass% to 0.85 mass% and including a martensitic structure in which no grain boundary oxide layer caused by Si exists; a second layer having a carbon concentration of 0.1 mass% to 0.4 mass% and including a martensitic structure; and a third layer having a carbon concentration of 0.1 mass% to 0.4 mass% and including no martensitic structure.
Inventors:
Takuji Obayashi
Keita Taguchi
Susumu Kato
Shuji Ozawa
Manabu Kubota
Yuji Adachi
Hirokazu Sato
Keita Taguchi
Susumu Kato
Shuji Ozawa
Manabu Kubota
Yuji Adachi
Hirokazu Sato
Application Number:
JP2013223518A
Publication Date:
January 13, 2016
Filing Date:
October 28, 2013
Export Citation:
Assignee:
Aisin AW Co., Ltd.
International Classes:
C21D9/32; C21D1/06; C21D1/10; C22C38/00; C22C38/60; C23C8/22
Foreign References:
| WO2006118243A1 |
Attorney, Agent or Firm:
Patent Business Corporation Aichi International Patent Office