基于田口方法的大型Cr5钢支承辊喷雾淬火工艺优化  

Optimization of spray quenching process for large Cr5 steel backup rolls based on Taguchi method

作　　者：王葛[1] 刘洋[1] 陈威宇[1] 韩大阔 李磊[1] 李强 

机构地区：[1]燕山大学国家冷轧板带装备及工艺工程技术研究中心,河北秦皇岛066004

出　　处：《材料热处理学报》2016年第12期196-202,共7页Transactions of Materials and Heat Treatment

基　　金：河北省自然科学基金面上项目(E2016203119);燕山大学重型机械协同创新计划课题(ZX01-20140100-03)

摘　　要：为了提高大型Cr5锻钢支承辊的综合力学性能,论文基于数值模拟技术,并采用田口方法,以某大型Cr5锻钢支承辊喷雾淬火后辊身表面与中心温差、淬硬层深度以及轴向残余拉应力为性能指标,以淬火温度、淬火方式、冷却时间和介质温度为控制因子,以工件的转移时间、环境温度和淬火温度测量误差为噪声因子,对该大型Cr5锻钢支承辊的喷雾淬火工艺进行了优化。通过方差分析得到了影响各性能指标的显著因素,并经综合分析给出了其最佳喷雾淬火工艺。结果表明,优化后的喷雾淬火工艺能有效降低支承辊辊身中截面的温度梯度,提高支承辊的淬硬层深度,并显著降低支承辊的淬火残余拉应力。Quenching process of the Cr5 steel backup rolls was optimized by using Taguchi method to improve the mechanical properties of large backup roll based on numerical simulation technology. The depth of hardening layer,the temperature difference between surface and center and the axial residual stress after quenching were selected as performance index. The quenching temperature,cooling method,cooling time and temperature of quenchant were chosen as control factors and the transfer time,environment temperature and deviation of quenching temperature measurement were chosen as noise factors. The significant influence factors was selected and the best process combination of influence factors were given through the analysis of variance The best optimum processing parameters during quenching were provided. The results show that the optimization process can effectively improve the hardened layer depth of the backup roll and reduce the residual stress and temperature gradient.

关 键 词：田口方法 Cr5钢 支承辊 淬火 数值模拟 

分 类 号：TG156.3[金属学及工艺—热处理]