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研究了回火温度对ZG35Cr2NiMoVTi钢显微组织、硬度、冲击韧性及抗冲击磨料磨损性的影响。结果表明,ZG35Cr2NiMoVTi钢淬火后组织为板条状马氏体和少量残留奥氏体;提高回火温度,可依次得到回火马氏体、回火贝氏体与屈氏体、回火索氏体、回火珠光体;随回火温度提高,ZG35Cr2NiMoVTi钢硬度下降,V型缺口冲击吸收能量先增加,但在400℃时明显下降,随后又随回火温度提高而显著增加,600℃回火时,冲击吸收能量最大,为45 J;随回火温度升高,ZG35Cr2NiMoVTi钢耐磨性逐渐下降,200℃时耐磨性较好,主要磨损机制为疲劳剥落磨损和切削磨损;而600℃回火时的耐磨性最差,主要磨损机制为塑变推碾犁沟与切削磨损。
The effects of tempering temperature on microstructure, hardness, impact toughness and impact abrasion resistance of ZG35Cr2NiMoVTi steel were studied. The results show that the microstructure of ZG35Cr2NiMoVTi steel after quenching is lath martensite and a small amount of retained austenite; by increasing the tempering temperature, tempered martensite, tempered bainite and troostite can be sequentially obtained, The hardness of ZG35Cr2NiMoVTi steel decreases and the V-notch impact energy increases first, but decreases sharply at 400 ℃, and then increases with the increase of tempering temperature. The tempering temperature of 600 ℃ , The impact absorption energy is the largest, 45 J; With the tempering temperature increases, the wear resistance of ZG35Cr2NiMoVTi steel gradually decreases, and the wear resistance is better at 200 ℃. The main wear mechanism is fatigue flaking wear and wear; Wear resistance when the worst fire, the main mechanism of wear and tear for plastic deformation push roller furrows and cutting wear.