热处理工艺对汽车用模具钢3Cr2Mo性能的影响

Effects of Heat Temperature Process on Microstructure and Properties of Die Steel 3Cr2Mo Used for Automobile

通过采用不同温度对新型模具钢进行淬火处理,分析了淬火温度对模具钢组织、显微硬度、冲击韧度和磨损量的影响。结果表明,淬火温度较低时,模具钢组织主要为碳化物;随淬火温度升高,组织均匀,出现马氏体组织;淬火温度1200℃,马氏体组织粗大。随淬火温度升高,模具钢硬度和冲击韧度先增加后减小,1050℃淬火时达到最大值。模具钢磨损量随硬度变大而变小,磨损时间越长,磨损速率越低。

The new type of steel was quenched by adopting different temperatures. The effects of quenching temperature on microstructure, microhardness, impact toughness and wear mass toss of the die steel were analyzed. The results show that when the quenching temperature is lower, the microstructure of die steel is mainly composed of carbide; with the increase of quenching temperature, there is uniform organization; at the quenching temperature of 1200℃, martensite structure becomes bulky. With the increase of quenching temperature, the hardness and impact toughness of the steel increase firstly and then decrease; it obtains the maximum values at 1050℃. With the increase of hardness, the wear mass loss of the die steel decreases. As wear time is longer, the wear rate is lower.