摘要
采用OM、冲击试验、硬度测试等,研究了淬火、回火工艺对高碳Cr12MoNiV4模具钢显微组织与力学性能的影响。结果表明:淬火态高碳Cr12MoNiV4模具钢组织主要为马氏体、残余奥氏体以及剩余碳化物。随着淬火温度的升高,试验钢组织中碳化物逐渐溶解,硬度先升高后降低,1130℃淬火试验钢硬度达到最大值64.1 HRC。在400~600℃回火温度区间,试验钢回火后出现了二次硬化现象。1130℃淬火试验钢,经500℃回火,硬度达到最大值,经600℃回火,冲击功达到最大值。
The effects of quenching and tempering on the microstructure and mechanical properties of high carbon Cr12MoNiV4 die steel were studied by OM,impact test and hardness test.The results show that the microstructure of quenched high carbon Cr12MoNiV4 die steel are mainly martensite,retained austenite and residual carbide.With the increase of quenching temperature,carbides gradually dissolve in the microstructure of the test steel,and the hardness of the test steel first increases and then decreases.The hardness of the test steel quenched at 1130℃reaches the maximum of 64.1 HRC.In the tempering temperature range of 400-600℃,the test steel generates secondary hardening after tempering.The hardness of the quenched test steel at 1130℃reaches its maximum after tempering at 500℃,and the impact work reaches its maximum after tempering at 600℃.
作者
樊甜甜
FAN Tiantian(College of Technology&Engineering,Yangtze University,Jingzhou 434000,China)
出处
《热加工工艺》
北大核心
2022年第8期113-115,共3页
Hot Working Technology
基金
湖北省自然科学基金项目(2016CFC740)
湖北省教育厅科学技术研究项目(B2016445)。
