作者：朱繁康，张伟文，冼酷元（广州华工光机电科技有限公司，广东广州510640）
摘要：分析了Cr12MoV钢制电池模具早期开裂失效的原因为圆模大块碳化物超标和热处理回火不充分；研究了不同热处理工艺的试样硬度、显微组织、抗拉强度、冲击韧性和耐磨性。结果表明，经预先热处理+最终热处理+深冷处理的试样各项性能指标最优，满足使用要求。
关键词：Cr12MoV钢；电池圆模；失效分析；热处理工艺
中图分类号：TG162.4 文献标识码：B 文章编号：1001-2168（2020）10-0066-06
DOI：10.16787/j.cnki.1001-2168.dmi.2020.10.015
Research on failure analysis and heat treatment process of die for Cr12MoV steel battery
ZHU Fan-kang, ZHANG Wei-wen, XIAN Ku-yuan (Guangzhou Huagong Optical Mechanical & Electrical Technology Co., Ltd., Guangzhou Guangdong 510640, China)
Abstract: The causes for the early cracking and failure of die for Cr12MoV steel battery were analyzed, which existed large carbides in die part and insufficient tempering. The hardness, microstructure, tensile strength, impact toughness, and wear resistance of the specimens with different heat treatment processes were studied. The results showed that the specimens with pre-heat treatment, final heat treatment and cryogenic treatment had the best performance indexes and met the use requirements.
Key words: Cr12MoV steel; die for battery; failure analysis; heat treatment process