奥氏体化温度对C-Si-Mn钢淬火-配分后显微组织与拉伸性能的影响
Effect of Austenitizing Temperature on Microstructure and Tensile Properties of C-Si-Mn Steel after Quenching and Partitioning Treatment
摘 要
将初始组织为马氏体的0.2C-1.6Si-1.8Mn钢在不同温度（840，870，910℃）奥氏体化后进行淬火-配分（Q&P）处理，研究了奥氏体化温度对该钢显微组织与拉伸性能的影响。结果表明：当奥氏体化温度在两相区时，Q&P处理后试验钢中的铁素体主要呈带状，残余奥氏体呈块状和薄带状；随着奥氏体化温度升高，铁素体和残余奥氏体含量减少，马氏体含量增加，对应的屈服强度和抗拉强度增大，断后伸长率和强塑积下降；840℃奥氏体化+Q&P处理后试验钢更高的断后伸长率与其更高含量的残余奥氏体且残余奥氏体呈块状和薄带状2种形态有关，这能有效扩展相变诱导塑性效应区间。
奥氏体化温度
残余奥氏体形态
力学性能
quenching & partitioning steel
austenitizing temperature
retained austenite morphology
mechanical property
Abstract
0.2C-1.6Si-1.8Mn steel with initial martensite microstructures was subjected to austenitizing at different temperatures (840, 870, 910℃) and quenching-partitioning (Q&P) treatment. The effect of austenitizing temperature on the microstructure and tensile properties of the steel was studied. The results show that when the austenitizing temperature was in the two-phase region, the ferrite in the Q&P treated experimental steel was mainly banded, and the retained austenite was blocky and flaky. With the increase of austenitizing temperature, the content of ferrite and retained austenite decreased, and the content of martensite increased; accordingly, the yield strength and the tensile strength increased while the percentage elongation after fracture and the product of strength and elongation decreased. The higher percentage elongation after fracture of the Q&P treated experimental steel at austenitizing temperature of 840℃ was related to the higher content of the retained austenite with two forms of block and flake, which could effectively expand the transformation induced plasticity effect range.
中图分类号 TG156.1 DOI 10.11973/jxgccl202302007
所属栏目 试验研究
基金项目 广西科技重大专项项目（桂科AA22067079）
收稿日期 2022/5/6
修改稿日期 2022/12/20
网络出版日期
作者单位点击查看
备注阎骏(1970-),男,广西玉林人,高级工程师,学士
引用该论文: YAN Jun,ZHOU Bowen,FAN Lei. Effect of Austenitizing Temperature on Microstructure and Tensile Properties of C-Si-Mn Steel after Quenching and Partitioning Treatment[J]. Materials for mechancial engineering, 2023, 47(2): 39～43
阎骏,周博文,樊雷. 奥氏体化温度对C-Si-Mn钢淬火-配分后显微组织与拉伸性能的影响[J]. 机械工程材料, 2023, 47(2): 39～43
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参考文献
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【4】张君, 丁桦, 唐正友, 等.Nb及二次淬火对Q&P钢组织性能的影响[J].东北大学学报(自然科学版), 2013, 34(1):66-70. ZHANG J, DING H, TANG Z Y, et al.Effects of Nb and final quenching on microstructure and mechanical property of Q & P steels[J].Journal of Northeastern University (Natural Science), 2013, 34(1):66-70.
【5】LIU G, ZHANG S G, LI J, et al.Fast-heating for intercritical annealing of cold-rolled quenching and partitioning steel[J].Materials Science and Engineering:A, 2016, 669:387-395.
【6】MANDAL G, GHOSH S K, BERA S, et al.Effect of partial and full austenitisation on microstructure and mechanical properties of quenching and partitioning steel[J].Materials Science and Engineering:A, 2016, 676:56-64.
【7】ZHANG J, DING H, ZHAO J W.Effect of pre-quenching process on microstructure and mechanical properties in a Nb-microalloyed low carbon Q-P steel[J].Materials Science Forum, 2015, 816:729-735.
【8】ZHANG J, DING H, MISRA R D K, et al.Enhanced stability of retained austenite and consequent work hardening rate through pre-quenching prior to quenching and partitioning in a Q-P microalloyed steel[J].Materials Science and Engineering:A, 2014, 611:252-256.
【9】任勇强, 谢振家, 张宏伟, 等.前躯体组织对C-Mn-Si钢组织特征及力学行为的影响[J].金属学报, 2013, 49(12):1558-1566. REN Y Q, XIE Z J, ZHANG H W, et al.Effect of precursor micro structure on morphology feature and mechanical property of C-Mn-Si steel[J].Acta Metallurgica Sinica, 2013, 49(12):1558-1566.
【10】SUN S H, ZHAO A M.Effect of microstructure morphology on mechanical properties of quenching and partitioning steel[J].Materials Science and Technology, 2018, 34(3):347-354.
【11】KANG T, ZHAO Z Z, LIANG J H, et al.Effect of the austenitizing temperature on the microstructure evolution and mechanical properties of Q&P steel[J].Materials Science and Engineering:A, 2020, 771:138584.
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【13】SU Y Y, CHIU L H, CHUANG T L, et al.Retained austenite amount determination comparison in JIS SKD11 steel using quantitative metallography and X-ray diffraction methods[J].Advanced Materials Research, 2012, 482/483/484:1165-1168.
【14】SANTOFIMIA M J, ZHAO L, SIETSMA J.Microstructural evolution of a low-carbon steel during application of quenching and partitioning heat treatments after partial austenitization[J].Metallurgical and Materials Transactions A, 2009, 40(1):46-57.
【15】HAJYAKBARY F, SIETSMA J, PETROV R H, et al.A quantitative investigation of the effect of Mn segregation on microstructural properties of quenching and partitioning steels[J].Scripta Materialia, 2017, 137:27-30.
【16】WANG C Y, ZHANG Y J, CAO W Q, et al.Austenite/martensite structure and corresponding ultrahigh strength and high ductility of steels processed by Q&P techniques[J].Science China Technological Sciences, 2012, 55(7):1844-1851.
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【21】YI H L, CHEN P, BHADESHIA H K D H.Optimizing the morphology and stability of retained austenite in a δ-TRIP steel[J].Metallurgical and Materials Transactions A, 2014, 45(8):3512-3518.
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