徐德超,张博明,李学涛,李润昌,滕华湘

• 1:首钢集团有限公司技术研究院
• 2:绿色可循环钢铁流程北京市重点实验室
• 3:首钢京唐钢铁联合有限责任公司

摘要(Abstract)：

利用光学显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)、室温拉伸检测等方法研究了热处理工艺对空气硬化钢S800AH显微组织和力学性能的影响。结果表明:空气硬化钢在空冷状态下即获得了大量的马氏体和粒状贝氏体;随热处理温度的升高,空气硬化钢的奥氏体化程度增加,强度先升高后略有下降,屈服强度、抗拉强度在900℃时达到最大,分别为781 MPa和1007 MPa。空气硬化钢具有较高的抗回火性能,当回火温度在500℃以下时,屈服强度和抗拉强度分别仍高于700 MPa和800 MPa。回火过程中细小弥散的析出物抑制了回复与再结晶,同时具有析出强化作用,使得钢具有优良的综合力学性。

关键词(KeyWords)： 空气硬化钢;热处理;微观组织;力学性能

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 徐德超,张博明,李学涛,李润昌,滕华湘

DOI: 10.13289/j.issn.1009-6264.2020-0019

参考文献(References)：

• [1] Grydin O,Nuernberger F,Zou Y,et al.Formation and properties of mixed ferritic-martensitic microstructures in the air-hardening steel LH800[J].Steel Research International,2014,85(9):1340-1347.
• [2] Grydin O,Rodman D,Schaper M.Influence of cold forming and heat treatment on the microstructure and mechanical properties of an air-hardening steel[J].Steel Research International,2012,83(11):1020-1028.
• [3] Grydin O,Nuernberger F,Schaper M.Distortion analysis of air hardened deep drawn parts of the air-hardened steel LH800[C]//Proceedings from the 6th International Quencing and Control of Distortion Conference Including the 4th International Distortion Engineering Conference,Chicago,2012,829-838.
• [4] 张云燕,刘静,王世森,等.1000 MPa级在线淬火钢回火工艺对屈强比的影响[J].钢铁研究,2012,40(6):37-39.ZHANG Yun-yan,LIU Jing,WANG Shi-sen,et al.Influence of temper process on yield-tensile ratio of 1000 MPa grade plate produced by direct quenching[J].Research on Iron and Steel,2012,40(6):37-39.
• [5] 赵燕青,吴辉,王学敏.690 MPa级低碳贝氏体钢回火后的组织与性能[J].金属热处理,2015,35(10):40-43.ZHAO Yan-qing,WU Hui,WANG Xue-min.Microstructure and properties of 690 MPa grade low carbon bainitic steel after tempering[J].Heat Treatment of Metals,2015,35(10):40-43.
• [6] 刘庆冬,褚于良,彭剑超,等.回火马氏体中合金碳化物的3D原子探针表征 Ⅲ·粗化[J].金属学报,2009,45(9):1297-1302.LIU Qing-dong,CHU Yu-liang,PENG Jian-chao,et al.3D atom probe characterazation of alloy carbides in martenite III.Coarseningn[J].Acta Metallurgica Sinica,2009,45 (9):1297-1302.
• [7] 惠卫军,董瀚,翁宇庆,等.回火温度对Cr-Mo-V系高强度钢力学性能的影响[J].金属学报,2004,38(10):1009-1014.HUI Wei-jun,DONG Han,WENG Yu-qing,et al.Effect of heat treatment parameters on mechanical properties of high strength Cr-Mo-V steel[J].Acta Metallurgica Sinica,2004,38(10):1009-1014.
• [8] 雍岐龙.钢铁材料中的第二相[M].北京:冶金工业出版社,2006.
• [9] Ju B,Wu H B,Tang D,et al.Characterization of (Nb,Ti,Mo)C precipitates in an ultrahigh strength martensitic steel[J].Journal of Iron and Steel Research,International,2016,23(5):495-500.
• [10] 张可,孙新军,雍岐龙,等.回火温度对高Ti微合金直接淬火高强钢组织及性能的影响[J].金属学报,2014,50(8):553-560.ZHANG Ke,SUN Xin-jun,YONG Qi-long,et al.Effect of tempering time on the microstructure and mechanical properties of high Ti microalloyed muenched martensitic steel[J].Acta Metallurgica Sinica,2014,50(8):553-560.
• [11] Hufenbach J,Giebeler L,Hoffmann M,et al.Effect of short-term tempering on microstructure and mechanical properties of high-strength FeCrMoVC[J].Acta Materialia,2012,60(11):4468-4476.

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