Title:
COLD-ROLLED STEEL SHEET AND COLD-ROLLED STEEL SHEET MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2022/210761
Kind Code:
A1
Abstract:
Provided is a cold-rolled steel sheet having excellent punching properties. This cold-rolled steel sheet has a predetermined component composition and a steel structure in which the average grain diameter of ferrite is 10 μm or less, the average grain diameter of cementite existing in a ferrite grain boundary is 5 μm or less, the average grain diameter of NaCl-type carbides including at least one of Nb, Ti, and V and existing in ferrite grains is 0.5 μm or less, and the average interval between the NaCl-type carbides is 710 nm or less.
Inventors:
OJIMA MAYUMI (JP)
SAKURAI YASUHIRO (JP)
FUNAKAWA YOSHIMASA (JP)
KIDO AKIMASA (JP)
SAKURAI YASUHIRO (JP)
FUNAKAWA YOSHIMASA (JP)
KIDO AKIMASA (JP)
Application Number:
PCT/JP2022/015630
Publication Date:
October 06, 2022
Filing Date:
March 29, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21D9/46; C22C38/00; C22C38/38; C22C38/60
Domestic Patent References:
| WO2019163828A1 | 2019-08-29 |
Foreign References:
| JP2008133514A | 2008-06-12 | |||
| JP2006097109A | 2006-04-13 | |||
| JP2015105384A | 2015-06-08 | |||
| JP2017193752A | 2017-10-26 | |||
| JP6690792B1 | 2020-04-28 | |||
| JP2017075349A | 2017-04-20 | |||
| JP2019039056A | 2019-03-14 | |||
| JPH05171288B1 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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