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研究了25MnSiMoVA钢的零保温淬火工艺,并对显微组织和力学性能进行了分析。结果表明:硬度、强度和耐磨性均随淬火温度的升高而增加,在940℃淬火时达到最大峰值,超过940℃以后,随着淬火温度的升高而降低;在940℃淬火后的显微组织为细小的板条马氏体,碳、钒元素存在浓度起伏;在150N、300 r/min、1200 s的试验条件下,940、970℃淬火后的试样磨损质量损失最少,具有最佳的抗磨损性能。
The zero-quenching process of 25MnSiMoVA steel was studied and the microstructure and mechanical properties were analyzed. The results show that the hardness, strength and wear resistance increase with the increase of quenching temperature and reach the maximum peak value at 940 ℃. When the temperature exceeds 940 ℃, the hardness decreases with the increase of quenching temperature. After quenching at 940 ℃ The microstructure was fine lath martensite, and the concentrations of carbon and vanadium were fluctuated. Under the test conditions of 150N, 300 r / min and 1200 s, the wear loss of specimen after quenching at 940 and 970 ℃ was the least, Best anti-wear performance.