LGP20钢塑料模具预硬化处理工艺的研究与应用  

Study and application on pre-hardening process of plastic die steel LGP20

作　　者：沈敏 覃永国 罗永恒 

机构地区：[1]柳州钢铁中板厂,广西柳州545002

出　　处：《金属热处理》2013年第7期90-92,共3页Heat Treatment of Metals

摘　　要：研究了正火温度、回火温度对塑料模具钢LGP20组织和硬度的影响。结果表明:LGP20钢最佳预硬化热处理工艺参数为870℃正火,根据预硬化硬度要求,回火温度可在450～600℃范围选择,钢板组织为回火贝氏体+回火索氏体+回火屈氏体。研究结果应用于批量生产,钢板硬度均匀,满足模具加工和表面质量要求。The effect of normalizing temperature and tempering temperature on microstructure and hardness of LGP20 steel was researched. The results show that the best pre-hardening parameters should be normalizing at 870 ℃ and tempering at 450-600℃ depending on prehardened hardness requirements, and corresponding structures are tempered bainite ＋ minor tempered sorbite ＋ minor tempered troostite. The study results are applied to batch production, and the hardness of LGP20 steel is uniform and meets the requirement of workability and surface quality for various dies.

关 键 词：塑料模具钢 预硬化 硬度 热处理 

分 类 号：TG156.5[金属学及工艺—热处理]