Title:
STEEL SHEET FOR CARBURIZING, AND PRODUCTION METHOD FOR STEEL SHEET FOR CARBURIZING
Document Type and Number:
WIPO Patent Application WO/2019/044971
Kind Code:
A1
Abstract:
Provided are a steel sheet for carburizing having excellent ductility, and a production method therefor. This steel sheet contains, by mass%, 0.02% to less than 0.30% C, 0.005% to less than 0.5% Si, 0.01% to less than 3.0% Mn, not more than 0.1% P, not more than 0.1% S, 0.0002% to 3.0% sol. Al, not more than 0.2% N, and 0.010% to 0.150% Ti, with the remainder comprising Fe and impurities. The number of carbides per 1,000 μm2 is not more than 100. The percentage of carbides having an aspect ratio of 2.0 or less is 10% or more relative to all carbides. The average circle equivalent diameter of the carbides is not more than 5.0 μm, and the average crystal grain size of ferrite is not more than 10.0 μm.
Inventors:
HASHIMOTO MOTONORI (JP)
HIKIDA KAZUO (JP)
TODA YURI (JP)
HIKIDA KAZUO (JP)
TODA YURI (JP)
Application Number:
PCT/JP2018/032112
Publication Date:
March 07, 2019
Filing Date:
August 30, 2018
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
C22C38/00; C21D1/06; C21D9/46; C22C38/14; C22C38/58; C22C38/60
Domestic Patent References:
| WO2016148037A1 | 2016-09-22 | |||
| WO2016190370A1 | 2016-12-01 |
Foreign References:
| JP2013018999A | 2013-01-31 |
Other References:
See also references of EP 3517648A4
Attorney, Agent or Firm:
KAMEYA, Yoshiaki et al. (JP)
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