锻压技术

基于正交试验和灰色关联的模块锻件热处理工艺优化

英文标题：Optimization of heat treatment process for module forgings based on orthogonal test and gray correlation

作者：童洲谈毅段海峰陈晓斌

单位：广州城市理工学院

分类号：TG162

出版年,卷(期):页码：2021,46(8):186-192

摘要：

针对大型模块锻件锻造缺陷以及材料加工性能的要求，以汽车发动机曲轴锻模为例，制定锻后热处理工艺，并在Deform-3D数值模拟软件中进行有限元分析，确定了以待料时间、预热温度、预热时间、正火温度、正火时间这5个因素为设计变量，以总加热时间和最大残余应力为目标函数，对锻后热处理的前半段工艺进行多目标正交优化设计。利用灰色关联分析法对试验结果进行处理，获得了优化设计的最佳方案和工艺参数。结果表明，优化后的热处理工艺使得加热总时间大幅缩短26%，残余应力也有所降低，在保证模块锻件加工性能的同时，提高了生产效率。

Aiming at forging defects and requirements of material processing performance for large modular forgings, for automobile engine crankshaft forging die, the heat treatment process after forging was formulated and the finite element analysis was carried out in the numerical simulation software Deform-3D. Then, taking five factors such as material preparation time, pre-heating temperature, pre-heating time, normalizing temperature and normalizing time as design variables，and the total heating time and the maximum residual stress as the objective functions, the multi-objective orthogonal optimization design for the first half of heat treatment process after forging was conducted. Furthermore, the test results were processed by gray correlation analysis method, and the optimal design method and process parameters were obtained. The results show that the optimized heat treatment process has greatly shortened the total heating time by 26%, and the residual stress has also been reduced. Thus, while ensuring the processing performance of modular forgings, the production efficiency is improved.

基金项目：

2019年广东省普通高校特色创新类项目（本科）（2019KTSCX231）

童洲（1985-），男，工程硕士，实验师 E-mail：185176335@qq.com 通信作者：谈毅（1982-），男，学士，实验师 E-mail：249911313@qq.com

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