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采用不同的热处理工艺对数控机床主轴9Mn2V进行处理,并进行了耐磨性、抗冲击性和抗热疲劳性测试和分析。结果表明,与常规球化退火相比较,采用分级球化退火试样的磨损体积减少了22.13%、剪切断面率增加了6%、冲击吸收功增加了7.3 J、热疲劳主裂纹从6级变为5级,主轴的耐磨性、抗冲击性和抗热疲劳性得到提高;与常规冷却相比较,在调质淬火冷却过程中采用等温处理试样的磨损体积减少了12.5%、剪切断面率增加了5%、冲击吸收功增加了3.3 J、热疲劳主裂纹从5级变为1级,有利于提高主轴的耐磨性、抗冲击性和抗热疲劳性。
Using different heat treatment process of CNC machine tool spindle 9Mn2V for processing, and the wear resistance, impact resistance and thermal fatigue test and analysis. The results show that compared with the conventional spheroidizing annealing, the wear volume of the spheroidized spheroidized annealed sample decreases by 22.13%, the shear section rate increases by 6% and the impact absorbed energy increases by 7.3 J, the thermal fatigue crack increases from 6th grade Becomes 5, the wear resistance, impact resistance and thermal fatigue resistance of the main shaft are improved. Compared with the conventional cooling, the wear volume of the isothermal treated sample during the quenching and tempering process is reduced by 12.5% The cross-section rate increased by 5%, the impact absorption work increased by 3.3 J, and the thermal fatigue main crack changed from 5 levels to 1 level, which is beneficial to improve the wear resistance, impact resistance and thermal fatigue resistance of the main shaft.