Abstract：A high C-Cr high strength wear-resistant steel was designed. The end hardenability was tested. The influence of heat treatment on microstructure and properties was studied. The mechanical property and wear behavior was tested. The microstructure was characterized using SEM and TEM. The results indicated that the hardness was decreased with the increase of distance from the quench place, and it had a gently decrease trend at a distance of 0-2.5 cm, where the Brinell hardness was 63-65HRC. The microstructure of the experimental steel was almost martensite after quench and temper treatment, and the size of the martensite plate was different. After bainite isothermal quenching treatment, the bainite plates were parallel to each other, and the size of the bainite plate was uniform. There were thin films of retained austenite between bainite laths, and carbide precipitates with the length of 100-150 nm in the bainite plate. The precipitates and bainite laths were arranged in a 60° orientation. During the wear process, at 800 r/min, the weight loss of martensite was 168 mg, while 192 mg of bainite increased by 14.28%. The wear resistance of the martensite matrix was higher, while the mechanical properties of the bainite matrix were obviously higher than that of the martensite matrix. The yield strength was 1 955 MPa, tension strength was 2 485 MPa and the elongation was still 7%.
马胜宾, 滕敦波, 王俊翔. 热处理工艺对高C-Cr高强耐磨钢组织和性能的影响[J]. 中国冶金, 2021, 31(6): 39-44.
MA Sheng-bin, TENG Dun-bo, WANG Jun-xiang. Influence of heat treatment on microstructure and properties of high C-Cr high strength wear-resistant steel[J]. China Metallurgy, 2021, 31(6): 39-44.
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