Title:
鋼、浸炭鋼部品、及び浸炭鋼部品の製造方法
Document Type and Number:
Japanese Patent JP6468365
Kind Code:
B2
Abstract:
A steel according to an aspect of the present invention has a chemical composition within a predetermined range, in which a hardenability index Ceq ranges from greater than 7.5 to smaller than 44.0, a metallographic structure includes ferrite ranging from 85 to 100 area%, an average distance between sulfides, which are observed in a cross section parallel to a rolling direction of the steel and have an equivalent circle diameter ranging from 1 µm or greater to smaller than 2 µm, is shorter than 30.0 µm, and a presence density of the sulfides, which are observed in the cross section parallel to the rolling direction of the steel and have an equivalent circle diameter ranging from 1 µm or greater to smaller than 2 µm, is 300 pieces/mm 2 or more.
Inventors:
Satoshi Shiga
Manabu Kubota
Hajime Hasegawa
Hideo Mizukami
Manabu Kubota
Hajime Hasegawa
Hideo Mizukami
Application Number:
JP2017552729A
Publication Date:
February 13, 2019
Filing Date:
November 25, 2016
Export Citation:
Assignee:
Nippon Steel & Sumitomo Metal Corporation
International Classes:
C22C38/00; C21D1/06; C22C38/60; C23C8/22; C23C8/32; C23C8/80; C23C10/02
Domestic Patent References:
| JP2005232508A | ||||
| JP2013018999A | ||||
| JP2002069569A |
Foreign References:
| WO2012108460A1 | ||||
| WO2012108461A1 |
Attorney, Agent or Firm:
Sumio Tanai
Mitsuo Teramoto
Tomoo Katsumata
Hiroshi Yamaguchi
Mitsuo Teramoto
Tomoo Katsumata
Hiroshi Yamaguchi