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以模具钢为对象,分析不同的淬火和回火温度对其微观组织、硬度和耐磨性的影响。结果表明,随着淬火温度的升高,试验钢硬度先升高后降低,在1 100℃时取得最大值。随着回火温度的升高,试验钢硬度增大,当回火温度为560℃时,试验钢的硬度和耐磨性最高。试验钢最优的热处理工艺为:1 100℃油淬火后进行560℃×2 h回火。
Taking mold steel as object, the effects of different quenching and tempering temperatures on microstructure, hardness and wear resistance were analyzed. The results show that with the increase of quenching temperature, the hardness of test steel first increases and then decreases, reaching the maximum value at 1 100 ℃. With the tempering temperature increases, the test steel hardness increases, when the tempering temperature is 560 ℃, the test steel hardness and wear resistance of the highest. The optimal heat treatment process for the test steel is as follows: tempering at 560 ℃ × 2 h after oil quenching at 100 ℃.