STEEL MATERIAL AND PRODUCTION METHOD THEREFOR

Title:

STEEL MATERIAL AND PRODUCTION METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2020/054553

Kind Code:

A1

Abstract:

Provided are a steel material and a production method for the steel material. This steel material has a component composition containing, in mass%, 0.10-2.50% of C, 8.0-45.0% of Mn, 0.300% or less of P, 0.1000% or less of S, 0.10-5.00% of Ti, 0.001-5.000% of Al, 0.5000% or less of N, 0.1000% or less of O, and C, Ti, and Mn in amounts that satisfy 25([C] - 12.01[Ti]/47.87) + [Mn] ≥ 25 (where [C], [Ti], and [Mn] represent the contained amounts (mass%) of the respective elements), the balance being Fe and incidental impurities, and has a structure containing, in area percent, 90% or more of an austenitic phase, and 0.2% or more of Ti carbide. Such a structure is obtained by heating the steel material having the component composition at a temperature of 950°C or higher, and cooling the steel material to a temperature range of 900-500°C at a cooling rate of more than 1°C/s. As a result, the steel material acquires excellent abrasion resistance. Note that by adjusting the hardness of the austenitic phase to 200 HV or more, impact abrasion resistance is significantly improved.

Inventors:

TERAZAWA YUSUKE (JP)

Application Number:

PCT/JP2019/034830

Publication Date:

March 19, 2020

Filing Date:

September 04, 2019

Export Citation:

Click for automatic bibliography generation Help

Assignee:

JFE STEEL CORP (JP)

International Classes:

C22C38/00; C21D8/02; C21D9/46; C22C30/02; C22C37/00; C22C37/08; C22C38/60

Domestic Patent References:

WO2017169811A1

2017-10-05

Foreign References:

JP2007154295A	2007-06-21
JPS6227557A	1987-02-05
CN105483539A	2016-04-13
JP5879448B2	2016-03-08
JPS6014682B2	1985-04-15

Other References: