锻压技术

基于有环夹板热锻模具失效原因的延寿措施

英文标题：Life extension measures based on failure causes of hot forging die for ring clamp plate

作者：张厂育1 唐恬悦2

单位：1. 中铁高铁电气装备股份有限公司 2. 北京交通大学机械与电子控制工程学院

分类号：TG315.2

出版年,卷(期):页码：2025,50(1):206-214

摘要：

某H13钢有环夹板热锻模具在使用过程中出现裂纹导致早期失效。通过模具失效原因分析，设计并开展了H13钢的热处理试验研究及NOS525钢与H13钢的冷热疲劳试验对比研究，对模具的延寿措施进行了分析与讨论。结果表明：获得更优力学性能的H13钢的最佳热处理工艺方案为1060 ℃淬火、560 ℃两次回火。H13钢在循环350次时的裂纹长度达到100 μm，而NOS525钢在循环500次时的裂纹长度才达到100 μm，且在循环过程中，NOS525钢的表面硬度始终高于H13钢，因此，NOS525钢具有更强的抑制裂纹萌生和扩展的能力，具有更优秀的抗热疲劳性能和回火稳定性，认为可使用NOS525钢代替H13钢作为有环夹板热锻模具材料。

Cracks appear during the use of a hot forging die for H13 steel ring clamp plate, which leads to early failure. Therefore, by analyzing the causes of die failure, the heat treatment test for H13 steel and the comparative study of cold and hot fatigue tests between NOS525 steel and H13 steel were designed and carried out, and the measures to extend the life of die were analyzed and discussed. The results show that the optimal heat treatment process scheme for obtaining better mechanical properties of H13 steel is quenching at 1060 ℃ and tempering twice at 560 ℃. The crack length of H13 steel reaches 100 μm after 350 cycles, while the crack length of NOS525 steel only reaches 100 μm after 500 cycles. Moreover, during the cycling process, the surface hardness of NOS525 steel is always higher than that of H13 steel. Therefore, NOS525 steel has stronger ability to suppress crack initiation and propagation, and has better resistance to thermal fatigue and tempering stability. It is believed that NOS525 steel can be used instead of H13 steel as the material for ring clamp plate hot forging die.

基金项目：

作者简介：张厂育（1974-），男，学士，高级工程师 E-mail：276304450@qq.com

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