Title:
CARBIDE-CONTAINING HIGH-STRENGTH AND -TOUGHNESS BAINITIC WEAR-RESISTANT STEEL AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/135268
Kind Code:
A1
Abstract:
Carbide-containing high-strength and -toughness bainitic wear-resistant steel and a preparation method therefor. The chemical composition of the wear-resistant steel comprises: 0.6-1.2 wt% of C, 1.2-2.5 wt% of Si, 0.8-2.0 wt% of Mn, 5-10 wt% of Cr, less than or equal to 0.015 wt % of P, less than or equal to 0.01 wt % of S, 0.3-0.7 wt% of Mo, and 0.3-0.7 wt% of Ni, with the balance being Fe and inevitable trace impurities. The preparation method comprises: first smelting and casting designed components into an ingot; then forging or rolling the ingot into a slab, and performing spheroidizing annealing treatment; and finally, performing isothermal quenching heat treatment. The microstructure of the prepared wear-resistant steel is that: the matrix is micro/nano-scale bainitic ferrites and thin film austenites distributed alternately, spheroidal carbides having a diameter of 0.5-2 μm are dispersively distributed on the matrix, and the volume percentage of the spherical carbides is 7-12%.
Inventors:
PAN QING (CN)
LU XIANWEN (CN)
ZHENG HAO (CN)
BIAN BOQIAN (CN)
JIN XUEJUN (CN)
LIU BINGGANG (CN)
LU XIANWEN (CN)
ZHENG HAO (CN)
BIAN BOQIAN (CN)
JIN XUEJUN (CN)
LIU BINGGANG (CN)
Application Number:
PCT/CN2021/138839
Publication Date:
June 30, 2022
Filing Date:
December 16, 2021
Export Citation:
Assignee:
JIANGXI NAIPU MINING MACHINERY CO LTD (CN)
International Classes:
C21D1/20; C22C38/02; C21D1/32; C21D6/00; C22C33/04; C22C38/04; C22C38/44; C22C38/58
Foreign References:
| CN112695253A | 2021-04-23 | |||
| CN109913751A | 2019-06-21 | |||
| CN105803340A | 2016-07-27 | |||
| JP2020059919A | 2020-04-16 | |||
| CN107109507A | 2017-08-29 | |||
| CN109735770A | 2019-05-10 |
Attorney, Agent or Firm:
RUNPING & PARTNERS (CN)
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