摘要
针对热冲压模具存在的成本高、寿命低问题,提出采用“45钢+Fe基合金”和“5CrNiMo钢+Co基合金”的堆焊结构分别制造变强度热冲压模具的冷区和热区部分,通过显微组织分析和数值模拟方法验证两种热冲压模具堆焊结构的可行性。实验和模拟结果表明:45钢+Fe基合金、5CrNiMo钢+Co基合金均能形成较好的冶金结合;“45钢+Fe基合金”堆焊的热冲压模具在第4次热冲压循环后达到了动态的热平衡状态,模具的最高温度约为146℃、最大应力为134 MPa;“5CrNiMo钢+Co基合金”堆焊的热冲压模具的最高瞬时温度可达567℃、最大应力为146 MPa。研究结果表明,两种堆焊结构均满足热冲压成形过程中的强度要求,适合于热冲压模具的制造或修复。
Aiming at the issues of high cost and short service life of hot stamping dies,two surfaced structures,namely"45 steel+Febased alloy"and"5CrNiMo steel+Co-based alloy",were proposed for the fabrication of the cold and hot zones of a graded-strength hot stamping die,respectively.The feasibility of the two surfaced structures was evaluated through microstructural analysis and numerical simulation.The results indicate that the better metallurgical bonding is achieved at the interfaces of both 45 steel+Fe-based alloy and 5CrNiMo steel+Co-based alloy.For the hot stamping die surfaced with the"45 steel+Fe-based alloy",a dynamic thermal equilibrium is reached after the fourth stamping cycle,with the peak temperature of about 146 C and the maximum stress of 134 MPa.The hot stamping die surface with the"5CrNiMo steel+Co-based alloy"exhibites a maximum instantaneous temperature of 567 C and the maximum stress of 146 MPa.Therefore,both surfaced structures meet the strength requirements during hot stamping and are suitable for the manufacture or repair of hot stamping dies.
作者
彭世鑫
Peng Shixin(College of Intelligent Manufacturing,Chongqing City Vocational College,Chongqing 402160,China)
出处
《锻压技术》
北大核心
2026年第2期206-214,共9页
Forging & Stamping Technology
基金
重庆市教委科学技术研究项目(KJQN202403909)。
关键词
热冲压模具
电弧堆焊
显微组织
温度场
应力场
hot stamping die
arc surfacing
microstructure
temperature field
stress field
