锻压技术

基于Dynaform的B柱加强件热冲压全流程仿真及优化

英文标题：Simulation and optimization on B-pillar reinforcing parts during hot stamping process based on Dynaform

作者：刘雪飞黄馨阅向相王梦寒

关键词：热冲压 B柱马氏体正交试验 Dynaform

分类号：TG306

出版年,卷(期):页码：2019,44(6):46-52

摘要：

为研究不同工艺参数对超高强钢热冲压零件成形质量的影响规律，以B柱加强件为研究对象，基于Dynaform进行热成形及保压淬火全流程数值模拟。通过正交试验分析了坯料初始温度、模具初始温度、压边力和保压时间对热冲压产品的厚度均匀度、马氏体平均转化率和马氏体分布均匀性的影响规律，并且确定了最优工艺参数组合：坯料初始温度为750 ℃、模具初始温度为30 ℃、压边力为5000 N、保压时间为15 s。通过仿真验证，结果表明：建立的质量评价标准可以有效保证产品的性能。最优工艺参数组合下零件的质量评价标准分别为：厚度均匀度为0.0491、马氏体平均转化率为99.92%、马氏体分布均匀性为0.0024。

In order to study the influences of different process parameters on the forming quality of hot stamping parts for ultra-high strength steel, for B-pillar reinforcing parts, the numerical simulation during the whole process of hot forming, pressure holding and quenching was conducted by Dynaform. Then, the influences of initial blank temperature, initial die temperature, blank holder force and holding time on thickness uniformity, martensite average transformation rate and martensite distribution uniformity of hot stamping parts were analyzed by the orthogonal experiment, and the optimal combination of process parameter was determined with the initial blank temperature of 750 ℃, the initial die temperature of 30 ℃, the blank holder force of 5000 N and the holding time of 15 s. Through simulation verification, the results show that the established quality evaluation standard can effectively guarantee the performance of the product with the optimal combination of process parameters of the thickness uniformity of 0.0491, martensite average transformation rate of 99.92% and the martensite distribution uniformity of 0.0024.

基金项目：

工信部强基工程项目（TC160A310-20）

刘雪飞(1986-)，男，硕士，高级工程师 E-mail：lxffesto@163.com 通讯作者：王梦寒(1975-)，女，博士，副教授 E-mail：wmh9792@163.com

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