H13热作模具钢失效分析及工艺改进  

Failure analysis and process improvement of H13 hot-working die steel

作　　者：王汉 李亨[1] 徐凡凡 朱晓勇 王东明 WANG Han;LI Heng;XU Fan-fan;ZHU Xiao-yong;WANG Dong-ming(Anhui Provincial Key Laboratory of Aeronautical Structural Parts Forming,Manufacturing and Equipment,Hefei University of Technology,Hefei,Anhui 230009,China;Institute of In-telligent Manufacturing Technology,Hefei University of Technology,Hefei,Anhui 230009,China;Chizhou Jiuhua Mingkun Aluminum Company,Chizhou,Anhui 247100,China)

机构地区：[1]合肥工业大学航空结构件成形制造与装备安徽省重点实验室,安徽合肥230009 [2]合肥工业大学智能制造技术研究院,安徽合肥230009 [3]池州市九华明坤铝业有限公司,安徽池州247100

出　　处：《模具工业》2021年第6期59-62,共4页Die & Mould Industry

基　　金：国家重点研发计划重点专项项目(2017YFB0701803);安徽省科技重大专项项目(JZ2019AKKZ0268)。

摘　　要：结合实际生产针对H13热作模具钢分流桥根部过早出现开裂的现象进行研究,利用DeForm-3D有限元模拟软件对分流组合模的挤出过程进行数值模拟,研究了模具不同工作带长度对模具的应力场、金属流动均匀性的影响规律。研究发现,当工作带长度为6 mm、焊合室深度为12 mm时,分流桥根部等效应力最小且应力分布较均匀,坯料在下模工作带出口处的流速也较均匀。研究成果为铝型材热挤出成型用H13钢的模具合理设计提供了有效的理论参数。The study was carried out to investigate the phenomenon of premature cracking at the root of the porthole bridge of H13 hot-working die steel by using DeForm-3D finite element simula⁃tion software to numerically simulate the extrusion process of the porthole combined die.It fo⁃cused on the influence law of different working belt lengths of the die on the stress field and metal flow uniformity of the die.It was found that when the length of the working strip was 6 mm and the depth of the welding chamber was 12 mm,the equivalent force at the root of the manifold bridge was the smallest and the stress distribution was more uniform,and the flow rate of the bil⁃let at the exit of the working strip in the lower die was more uniform.The research results could provide effective theoretical parameters for the reasonable design of H13 steel dies for hot extru⁃sion forming of aluminum profiles.

关 键 词：数值模拟 分流组合模 挤出成型 模具参数 H13热作模具钢 

分 类 号：TG157[金属学及工艺—热处理]