摘要
采用OM、SEM和硬度测试等手段,研究了热处理工艺对5Cr4Ni Mo2VCo钢和H13钢热作模具钢的组织及性能的影响。结果表明:在相同的淬火温度下,5Cr4Ni Mo2VCo钢的淬火硬度高于H13钢,随淬火温度升高,碳化物溶解较多,当淬火温度高于1030℃时,晶粒粗化速率明显增加,淬火温度应不超过1030℃;5Cr4Ni Mo2VCo钢的回火硬度均高于H13钢,两钢的二次硬化峰值温度均为510℃,5Cr4Ni Mo2VCo钢的二次硬化峰值硬度高出H13钢3.7 HRC;在高温阶段,5Cr4Ni Mo2VCo钢具有更好的回火稳定性。
The influence of heat treatment on microstructure and properties of hot working die steel H13 and 5Cr4NiMo2VCo were studied by OM,SEM and hardness test. The results show that,the quenching hardness of the 5Cr4NiMo2VCo steel is higher than that of the H13 steel at the same quenching temperature; when the quenching temperature is above 1030 ℃,the grain coarsening rate is increased significantly,so that the quenching temperature should not exceed 1030 ℃. The tempering hardness of the 5Cr4NiMo2VCo steel is higher than the H13 steel,and the secondary hardening peak temperatures of the two steels are the same as 510 ℃,but the secondary hardening peak hardness of the5Cr4NiMo2VCo steel is 3. 7 HRC higher than that of the H13 steel. The 5Cr4NiMo2 VCo steel has better tempering stability at higher tempering temperature.
出处
《金属热处理》
CAS
CSCD
北大核心
2017年第10期91-96,共6页
Heat Treatment of Metals
关键词
热作模具钢
淬火
二次硬化
回火稳定性
hot working die steel
quenching
secondary hardening
tempering stability
