模具技术2016.No.6
文章编号：1001-4934(2016)06-0001-04
模具材料热导率对B柱热冲压模具温度场的影响
黄宗斌，罗爱辉2.3，万永红'，徐伟力2.3
（1.上汽通用五菱汽车股份有限公司，广西柳州545007；
2.宝山钢铁股份有限公司，上海201900；
3.汽车用钢开发与应用技术国家重点实验室，上海201900）
1
摘要：BSWCM是宝钢和上汽通用五菱共同开发的一种具有良好导热性能的热冲压专用模具材料，H13是一种传统热作模具钢，将2种材料进行对比分析模具材料热导率对B柱热冲压模具温度场的影响。首先，分别采用LFA447型激光导热仪和 DSC8000差示扫描量热仪测量2种材料的热扩散系数和比热容，然后基于2种材料的实验参数并结合实际生产工艺完成B柱大端模型的热冲压仿真。研究表明， BSWCM导热性能优于H13；模具材料采用BSWCM，凸模的最高温度为254.4C，凹模最高温度为240.5℃。相比于模具材料采用H13，凸、凹模的最高温度下降了约40
℃，模具上的温度分布也相对均匀，有利于延长模具的使用寿命。关键词：热冲压；热导率；数值模拟；B柱
中图分类号：TG306
文献标识码：A
The influence of thermal conductivity of die material on the thermal field of B
pillarhotstampingdie
HUANG Zong-bin,LUO Ai-hui,WAN Yong-hong,XU Wei-li
Abstract; BSwCM is a ncw material with good thermal conductivity developed by Baosteel and SGMW. This material is specially usced for hot stamping die. It is compared to H13, which is a traditional hot work dic steel,to analyze the influcnce of thermal conductivity of die material on the thermal field of B pillar hot stamping die. Firstly, the laser flash ther-mal analyzer FA447 and DSC8000 were used to measure the thermal diffusivity and specific heat capacity of the two materials. Then, these parameters are used to build simulation model based on the B pillar production process. It is found that the thermal conductivity of BSWCM is better than that of H13. When using BSWCM, the highest temperature of the punch is 254.4 C and that of the die is 240.5C, which are 40℃ lower than using H13. The die temperature distribution is also more uniform, which contributes to longer life of hot stamping die.
Keywords:hot stamping; thermal conductivity;numerical simulation;B pillar 收稿日期：2016-09-02
作者简介：黄宗斌（1969一），男，高级工程师。万方数据