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研究了不同温度(950、1000、1050℃)淬火+250℃回火处理对中碳低合金耐磨钢ZG35Cr2NiMoVTi显微组织、硬度、韧性、冲击磨料磨损耐磨性能的影响。结果表明:中碳低合金耐磨钢淬火组织主要为板条状马氏体+片状马氏体+少量残余奥氏体,回火组织为回火马氏体。随着淬火温度的增加,钢的硬度逐渐下降;冲击韧性随着淬火温度的升高先增加后保持稳定。在冲击功为1J的磨损工况下,950℃水淬+250℃回火处理试样耐磨性最好;在冲击功为4.5J的磨损工况下,1000/1050℃水淬+250℃回火处理的试样耐磨性最好。
The effects of different temperatures (950, 1000 and 1050 ℃) quenching and 250 ℃ tempering on the microstructure, hardness, toughness and abrasion and wear resistance of medium carbon and low alloy wear resistant steel ZG35Cr2NiMoVTi were studied. The results show that the quenched microstructure of medium-carbon and low-alloy wear-resistant steel is mainly lath martensite + lamellar martensite + a small amount of retained austenite, and the tempered microstructure is tempered martensite. With the increase of quenching temperature, the hardness of steel gradually decreases; impact toughness increases first and then stabilizes with the increase of quenching temperature. When the impact energy is 1J, the wear resistance of the sample is the best when it is tempered at 950 ℃ and tempered at 250 ℃. When the impact energy is 4.5J, the water quenching at 1000/1050 ℃ is + 250 ℃ Tempering the best sample wear resistance.