718塑料模具钢组织及硬度研究

Study on Structure and Hardness of 718 Plastic Die Steel

通过过对研发的预硬型718塑料模具钢大模块的组织性能进行研究,设计出合理的热处理工艺。①718H:淬火温度:875℃,保温时间:60min,水冷;回火温度:560℃,保温时间:65min,空冷;②718S淬火温度:875℃,保温时间:60min,油冷;回火温度:590℃,保温时间:65min,空冷。最终实现了模具钢截面硬度值波动控制在1.5HRC范围.

Based on the research and development of module structure performance of the pre-hardened 718 plastic mold steel, reasonable heat treatment processes are designed for 718H and 718S. For 718H steel, quenched at 875 ℃, soaked for 60 min, water cooled, then tempered at 560℃, soaked for 65 min, air cooled. For 718S steel,quenched at 875℃, soaked for 60 min,oil cooled,and then tempered at 590℃, soaked for 65 min, air cooled. With these processes the hardness of the section of the die steel is controlled within 1.5 HRC.