作者：朱繁康，張偉文，冼酷元（廣州華工光機電科技有限公司，廣東廣州510640）
摘要：分析了Cr12MoV鋼制電池模具早期開裂失效的原因為圓模大塊碳化物超標和熱處理回火不充分；研究了不同熱處理工藝的試樣硬度、顯微組織、抗拉強度、沖擊韌性和耐磨性。結果表明，經預先熱處理+最終熱處理+深冷處理的試樣各項性能指標最優，滿足使用要求。
關鍵詞：Cr12MoV鋼；電池圓模；失效分析；熱處理工藝
中圖分類號：TG162.4 文獻標識碼：B 文章編號：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