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为了得到较深的淬硬层,利用田口稳健设计方法,并通过Deform软件的热处理模块对支承辊的淬火过程进行数值模拟分析,以马氏体体积分数50%处的深度为目标值,选取淬火方式、淬火温度、冷却时间和淬火介质温度为控制因素,淬火温度的测量误差、工件转移时间和车间温度为噪声因素,对大型支承辊的淬火工艺参数进行设计优化,找到了影响目标值的显著因素,得到最优的淬火工艺为920℃喷雾淬火,冷却时间为7 h,淬火介质温度为60℃。对初始和最优淬火工艺方案分别进行了模拟计算,结果表明,马氏体层由原来的119.4 mm加深到196.8 mm。
In order to obtain the deeper hardened layer, the Taguchi robust design method was adopted and the quenching process of the support roller was numerically simulated by the Deform software heat treatment module. The target depth was taken as 50% of the volume fraction of the martensite, Method, quenching temperature, cooling time and quenching medium temperature as control factors, measurement error of quenching temperature, workpiece transfer time and workshop temperature as noise factors, design and optimization of quenching process parameters of large support roller, found significant impact on the target value Factor, get the best quenching process for 920 ℃ spray quenching, cooling time is 7 h, quenching medium temperature is 60 ℃. The initial and optimal quenching process were simulated respectively, the results show that the martensite layer deepens from 119.4 mm to 196.8 mm.