HIGH-STRENGTH STEEL SHEET AND METHOD FOR PRODUCING SAME

WIPO Patent Application WO/2021/054290

A1

The present invention provides: a high-strength steel sheet which can be used in various applications including automotive members and has excellent impact safety and moldability; and a method for producing the high-strength steel sheet.　A high-strength steel sheet according to one aspect of the present invention satisfies a specified chemical component composition and has a metal structure having an area fraction of ferrite of 0 to 10%, an area fraction of MA of 0 to 30% and an area fraction of a hard phase other than ferrite and MA of 70 to 100% and also having a volume fraction of retained austenite of 5 to 30%, wherein, when crystal grains each having a bcc structure or a bct structure are deemed as an aggregate in a region having an area of 0.05 μm2 and the skewness of IQ as analyzed by EBSD method is expressed in a specific relational equation, the skewness becomes -1.2 to -0.3.

JP4724406	Method for manufacturing hot-pressed high-strength steel members with low residual stress
JP2002332551	COMPOSITION FOR SILICON STEEL SHEET, SILICON STEEL SHEET, IRON CORE, ROTARY MACHINE AND METHOD FOR PRODUCING SILICON STEEL SHEET
WO/2012/077628	STEEL SHEET FOR BOTTOM COVERS OF AEROSOL CANS AND METHOD FOR PRODUCING SAME

MURATA TADAO
IKEDA MUNEAKI
MURAKAMI TOSHIO

PCT/JP2020/034736

March 25, 2021

September 14, 2020

Click for automatic bibliography generation  

KOBE STEEL LTD (JP)

C21D9/46; C22C38/00; C22C38/06; C22C38/58

WO2017208759A1	2017-12-07
WO2018221307A1	2018-12-06
WO2017169837A1	2017-10-05
WO2017138504A1	2017-08-17
WO2017179372A1	2017-10-19

JP2015517029A	2015-06-18
JP2019505694A	2019-02-28
JP5610102B2	2014-10-22
JP5589893B2	2014-09-17
JP2019168392A	2019-10-03

See also references of EP 4012056A4

KOTANI, Masataka et al. (JP)

View/Download PDF      PDF Help

Previous Patent: GLASS SHEET HAVING LOW RADIATION LAMINATED FILM, AND GLASS PRODUCT

Next Patent: ELECTROCHEMICAL CELL