双淬火+深冷处理工艺对Cr12Mo1V1模具钢组织和性能的影响
Effect of Double-Quenching and Cryogenic Treatment on Microstructure and Properties of Cr12Mo1V1 Die Steel
摘 要
对退火态Cr12Mo1V1模具钢分别进行一次淬火+回火、双淬火+回火、一次淬火+深冷+回火、双淬火+深冷+回火等工艺处理,其中一次淬火工艺为1 030℃×0.5 h油淬,双淬火工艺为1 050℃×0.5 h油淬+1 030℃×0.5 h油淬,深冷处理工艺为-60℃×1 h+-120℃×1 h,对比研究了双淬火+深冷处理对试验钢显微组织和力学性能的影响。结果表明:与一次淬火+回火工艺相比,双淬火+回火工艺可以改善共晶碳化物分布均匀性,使碳化物形态趋于球状;增加深冷处理对改善共晶碳化物形态和均匀度的效果不明显,但可降低残余奥氏体含量。双淬火+回火工艺处理后试验钢的硬度与一次淬火+回火处理后相近,但冲击吸收能量和抗弯强度分别提升22%和12%;增加深冷处理对试验钢硬度、冲击韧性和抗弯强度影响不大。
深冷处理
模具钢
共晶碳化物
力学性能
double-quenching
cryogenic treatment
die steel
eutectic carbide
mechanical property
Abstract
Annealed Cr12Mo1V1 die steel was treated by single quenching+tempering, double-quenching+tempering, single quenching+cryogenic treatment+tempering and double-quenching+cryogenic treatment+tempering processes, respectively. The single quenching process was 1 030 ℃×0.5 h oil quenching. The double-quenching process was 1 050 ℃×0.5 h oil quenching+1 030 ℃×0.5 h oil quenching. The cryogenic treatment was -60 ℃×1 h+-120 ℃×1 h. The effects of double-quenching+cryogenic treatment on the microstructure and mechanical properties of the test steel were studied contrastively. The results show that comparing with the single quenching+tempering process, the double-quenching+tempering process could improve the distribution uniformity of eutectic carbides, and make the carbides be spherical. The addition of cryogenic treatment had little effect on the improvement of the morphology and uniformity of eutectic carbides, but reduced the residual austenite content. The hardness of the test steel after the double-quenching+tempering treatment was similar to that after the single quenching+tempering treatment, while the impact absorption energy and bending strength increased by 22% and 12%, respectively. The addition of cryogenic treatment had little effect on the hardness, impact toughness and flexural strength of the test steel.
中图分类号 TG142.1 DOI 10.11973/jxgccl202209008
所属栏目 材料性能及应用
基金项目 国家重点研发计划项目(2020YFB0311000)
收稿日期 2022/6/28
修改稿日期 2022/7/26
网络出版日期
作者单位点击查看
备注邹春雷(1979-),男,辽宁大连人,正高级工程师,学士
引用该论文: ZOU Chunlei,YU Hang,REN Huiyuan,GU Jinbo,ZHOU Jian,CHI Hongxiao. Effect of Double-Quenching and Cryogenic Treatment on Microstructure and Properties of Cr12Mo1V1 Die Steel[J]. Materials for mechancial engineering, 2022, 46(9): 46～51
邹春雷,于航,任慧远,谷金波,周健,迟宏宵. 双淬火+深冷处理工艺对Cr12Mo1V1模具钢组织和性能的影响[J]. 机械工程材料, 2022, 46(9): 46～51
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【19】宁辉,吴红庆,邓志鹏,等.析出相对新型冷作模具钢强韧性的影响[J].机械工程材料,2020,44(增刊2):71-75. NING H,WU H Q,DENG Z P,et al.Effect of precipitation on strength and toughness of a new cold work Die steel[J].Materials for Mechanical Engineering,2020,44(S2):71-75.
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