亚温淬火对22SiMnCrNi2MoA钢组织和性能的影响
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摘要
探讨了亚温淬火+回火热处理对22SiMnCrNi2MoA钢的组织形貌、组成相和力学性能的影响.结果表明:亚温淬火后组织为回火马氏体和少量铁素体;随着亚温淬火温度的升高,块状铁素体的量逐渐减少,使材料的强度和低温韧性逐渐增加, 840℃亚温淬火时材料具有较好的强韧性.
The microstructure morphology, impact fracture surface and composition of the phase of 22SiMnCrNi2MoA steel treated by subcritical quenching and tempering processes are analyzed by means of optical microscope(OM), scanning electron microscopy(SEM), X-ray diffraction(XRD) technique and mechanical properties test. The results show that after subcritical quenching, the microstructure is composed of tempered martensite and a small amount of ferrite. With the increase of subcritical temperature, the amount of massive ferrite decreases gradually, the strength and low temperature toughness increase gradually, the strength and toughness have a better match when quenched at 840 ℃.
The microstructure morphology, impact fracture surface and composition of the phase of 22SiMnCrNi2MoA steel treated by subcritical quenching and tempering processes are analyzed by means of optical microscope(OM), scanning electron microscopy(SEM), X-ray diffraction(XRD) technique and mechanical properties test. The results show that after subcritical quenching, the microstructure is composed of tempered martensite and a small amount of ferrite. With the increase of subcritical temperature, the amount of massive ferrite decreases gradually, the strength and low temperature toughness increase gradually, the strength and toughness have a better match when quenched at 840 ℃.
引文
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[3] JIANG Jinxing,WU Huibin,LIANG Jinming,et al.Microstructural characterization and impact toughness of a jackup rig rack steel treated by intercritical heat treatment [J].Mater Sci Eng A,2013,587:359-364.
[4] TAO Pan,YU Hao,FAN Yongfei,et al.Effects of cooling method after intercritical heat treatment on microstructural characteristics and mechanical properties of as-cast high-strength low-alloy steel [J].Mater Design,2014,54:914-923.
[5] XIE Baosheng,CAI Qingwu,YUN Yang,et al.Development of high strength ultra-heavy plate processed with gradient temperature rolling,intercritical quenching and tempering [J].Mater Sci Eng A,2017,680:454-468.
[6] XIE Z J,YUAN S F,ZHOU W H,et al.Stabilization of retained austenite by the two-step intercritical heat treatment and its effect on the toughness of a low alloyed steel [J].Mater Design,2014,59:193-198.
[7] YAN Shu,LIU Xianghua,LIU W J,et al.Comparative study on microstructure and mechanical properties of a C-Mn-Si steel treated by quenching and partitioning (Q&P) processes after a full and intercritical austenitization [J].Mater Sci Eng A,2017,684:261-269.
[8] SU Guanqiao,GAO Xiuhua,ZHANG Dazheng,et al.Impact of reversed austenite on the impact toughness of the high-strength steel of low carbon medium manganese [J].JOM-J Min Met Mat Soc,2018,70(5):672-679.
[9] FARIVAR H,DEEPU M J,HANS M,et al.Influence of post-carburizing heat treatment on the core microstructural evolution and the resulting mechanical properties in case-hardened steel components [J].Mater Sci Eng A,2019,744:778-789.
[10] LI Anming.Modifying the microstructure and property of 30CrMnSi steel by subcritical austenite reverse transformation quenching [J].Eng Rev,2015,35(2):97-102.