WEAR-RESISTANT STEEL SHEET AND METHOD FOR PRODUCING SAME

Title:

WEAR-RESISTANT STEEL SHEET AND METHOD FOR PRODUCING SAME

Document Type and Number:

WIPO Patent Application WO/2021/054015

Kind Code:

A1

Abstract:

[Problem] To provide a wear-resistant steel sheet which exhibits high wear resistance at high temperatures from 300°C to 500°C, while having toughness at low temperatures at the same time. [Solution] A steel sheet which has a component composition that contains from 0.10% to 0.23% of C, from 0.05% to 1.00% of Si, from 0.10% to 2.00% of Mn, 0.050% or less of P, 0.050% or less of S, 0.050% or less of Al, from 0.05% to 5.00% of Cr, 0.0100% or less of N and 0.0100% or less of O, while satisfying 1.0 ≤ 0.45Cr + Mo ≤ 2.25, with the balance being made up of Fe and unavoidable impurities, and which has a structure wherein the volume fraction of martensite at the depth of 1 mm from the surface of the steel sheet is 95% or more. With respect to this steel sheet, the Vickers hardness at 400°C is 288 or more and the Brinell hardness at 25°C is from 360 to 490 HBW10/3000 at the depth of 1 mm from the surface of the steel sheet.

Inventors:

TAKAYAMA NAOKI (JP)
KITSUYA SHIGEKI (JP)
MURAKAMI YOSHIAKI (JP)

Application Number:

PCT/JP2020/031028

Publication Date:

March 25, 2021

Filing Date:

August 17, 2020

Export Citation:

Click for automatic bibliography generation Help

Assignee:

JFE STEEL CORP (JP)

International Classes:

C21D8/02; C22C38/00; C22C38/60

Domestic Patent References:

WO2019181130A1

2019-09-26

Foreign References:

JP2018123409A	2018-08-09
JP2004300474A	2004-10-28
JP2016125065A	2016-07-11
JP2018048399A	2018-03-29
JP2002115024A	2002-04-19
JP4645306B2	2011-03-09
JP4735191B2	2011-07-27
JPH10204575A	1998-08-04

Other References: