张鹏,李兵,徐飞越,王敏

• 1:湖北汽车工业学院材料科学与工程学院
• 2:湖北隆中实验室

摘要(Abstract)：

分析了Q&P钢在不同预变形(0%、3%、6%和9%)条件下的烘烤硬化行为。采用扫描电镜、X射线衍射仪(XRD)和电子背散射衍射(EBSD)等表征了试验钢在预变形和烘烤过程中的微观组织演变。结果表明：随着预变形量的增加，试验Q&P钢的烘烤硬化(BH)值先增加后减小，预变形量为6%时，BH值最大，为144 MPa。此外，在预变形较小时，晶粒尺寸是影响残留奥氏体稳定性的主要因素，马氏体转变优先发生在尺寸较大的残留奥氏体当中；随着预变形量的增加，大尺寸残留奥氏体消耗殆尽，在剩余残留奥氏体尺寸相差不大的情况下，其所在位置及其周围组织分布决定了残留奥氏体的稳定性。最后，烘烤过程中，会造成残留奥氏体数量的少量减少，这也会影响后续变形过程中相变诱导塑性效应的发生，不利于材料的整体塑性。

关键词(KeyWords)： Q&P钢;预变形;残留奥氏体稳定性;烘烤硬化;微观组织演变

Abstract:

Keywords:

基金项目(Foundation): 湖北隆中实验室自主创新项目资助(2022ZZ-30);; 湖北省重点研发项目(2021BAB019);; 大学生创新创业训练计划项目(S202310525032)

作者(Author): 张鹏,李兵,徐飞越,王敏

DOI: 10.13289/j.issn.1009-6264.2024-0067

参考文献(References)：

• [1] 陈辛波，杭鹏，王叶枫.电动汽车轻量化技术研究现状与发展趋势[J].汽车工程师，2015(11):23-28.CHEN Xin-bo,HANG Peng,WANG Ye-feng.Current status and development trend of electric vehicle lightweight technology[J].Automotive Engineer,2015(11):23-28.
• [2] 丁明德，张鹏，刘波.纯电动汽车轻量化机舱支架总成优化与验证[J].重庆交通大学学报(自然科学版),2021,40(11):128-134.DING Ming-de,ZHANG Peng,LIU Bo.Optimization and verification of the lightweight engine room bracket of electrical vehicle[J].Journal of Chongqing Jiaotong University(Natural Sciences),2021,40(11):128-134.
• [3] 王明明，张晓妍，肖亚茹，等.汽车用高强塑积钢关键研究进展之一：Q&P钢的研究进展[J].材料热处理学报，2019,40(6):11-19.WANG Ming-ming,ZHANG Xiao-yan,XIAO Ya-ru,et al.One of the key research progress of steels with high product of strength and elongation for automobiles:Research progress of Q&P steel[J].Transactions of Materials and Heat Treatment,2019,40(6):11-19.
• [4] 赵征志，梁驹华，汪烈承，等.Q&P工艺对冷轧高强钢中残留奥氏体的影响[J].材料热处理学报，2015,36(7):81-87.ZHAO Zheng-zhi,LIANG Ju-hua,WANG Lie-cheng,et al.Influence of quenching and partitioning process on retained austenite fraction of cold-rolled high strength steel[J].Transactions of Materials and Heat Treatment,2015,36(7):81-87.
• [5] 林方敏，邢梅，唐立志，等.Fe-Mn-Al-C系低密度钢及其强韧化机制研究进展[J].材料导报，2023,37(5):162-169.LIN Fang-min,XING Mei,TANG Li-zhi,et al.Research progress of Fe-Mn-Al-C low-density steels and their strengthening mechanisms[J].Materials Reports,2023,37(5):162-169.
• [6] Bleck W,Guo X,Ma Y.The TRIP effect and its application in cold formable sheet steels[J].Steel Research International,2017,88(10):1700218.
• [7] Soleimani M,Kalhor A,Mirzadeh H.Transformation-induced plasticity (TRIP) in advanced steels:A review[J].Materials Science and Engineering A,2020,795:140023.
• [8] Olson G B,Cohen M.A mechanism for the strain-induced nucleation of martensitic transformations[J].Journal of the Less Common Metals,1972,28(1):107-118.
• [9] He B B,Wang M,Huang M X.Resetting the austenite stability in a medium Mn steel via dislocation engineering[J].Metallurgical and Materials Transactions A,2019,50:2971-2977.
• [10] Li Z C,Ding H,Misra R D K,et al.Deformation behavior in cold-rolled medium-manganese TRIP steel and effect of pre-strain on the Lüders bands[J].Materials Science and Engineering A,2017,679:230-239.
• [11] Wang J J,Hui W,Xie Z,et al.Influence of pre-strain on microstructural characteristics and tensile deformation behaviour of a cold-rolled Al-containing medium Mn steel[J].Journal of Materials Science,2020,55(12):5296-5310.
• [12] Robertson L T,Hilditch T B,Hodgson P D.The effect of prestrain and bake hardening on the low-cycle fatigue properties of TRIP steel[J].International Journal of Fatigue,2008,30(4):587-594.
• [13] Liu L,He B,Huang M.The role of Transformation-Induced Plasticity in the development of advanced high strength steels[J].Advanced Engineering Materials,2018,20(6):1701083.
• [14] Pierce D T,Coughlin D R,Clarke K D,et al.Microstructural evolution during quenching and partitioning of 0.2C-1.5Mn-1.3Si steels with Cr or Ni additions[J].Acta Materialia,2018,151:454-469.
• [15] Speer J,Matlock D K,De Cooman B C,et al.Carbon partitioning into austenite after martensite transformation[J].Acta Materialia,2003,51(9):2611-2622.
• [16] Xie Z J,Ren Y Q,Zhou W H,et al.Stability of retained austenite in multi-phase microstructure during austempering and its effect on the ductility of a low carbon steel[J].Materials Science and Engineering A,2014,603:69-75.
• [17] Zhi H,Zhang C,Antonov S,et al.Investigations of dislocation-type evolution and strain hardening during mechanical twinning in Fe-22Mn-0.6C twinning-induced plasticity steel[J].Acta Materialia,2020,195:371-382.
• [18] Kim H J,Lee M G.Analysis of hydrogen trapping behaviour in plastically deformed quenching and partitioning steel in relation to microstructure evolution by phase transformation[J].Journal of Alloys and Compounds,2022,904:164018.
• [19] Liu Q,Jensen D J,Hansen N.Effect of grain orientation on deformation structure in cold-rolled polycrystalline aluminium[J].Acta Materialia,1998,46(16):5819-5838.
• [20] Ji D,Zhang M,Zhu D,et al.Influence of microstructure and pre-straining on the bake hardening response for ferrite-martensite dual-phase steels of different grades[J].Materials Science and Engineering A,2017,708:129-141.
• [21] 陈兴品，李文佳，任平，等.C含量对Fe-Mn-Al-C低密度钢组织和性能的影响[J].金属学报，2019,55(8):951-957.CHEN Xing-pin,LI Wen-jia,REN Ping,et al.Effects of C content on microstructure and properties of Fe-Mn-Al-C low-density steels[J].Acta Metallurgica Sinica,2019,55(8):951-957.
• [22] Shu W,Wang X M,Shang C J,et al.The influence of oxide inclusion on austenite grain size and heat affected zone toughness for low carbon steels[C]//Materials Science Forum.Trans Tech Publications Ltd,2012,715:617-622.
• [23] Cao W,Wang C,Wang C,et al.Microstructures and mechanical properties of the third generation automobile steels fabricated by ART-annealing[J].Science China Technological Sciences,2012,55(7):1814-1822.
• [24] Luo H W,Huang M X,Dong H,et al.Effect of intercritical annealing on the Luders strains of medium Mn transformation-induced plasticity steels[J].Materials & Design,2015,83:42-48.
• [25] Gibbs P J,De Cooman B C,Brown D W,et al.Strain partitioning in ultra-fine grained medium-manganese transformation induced plasticity steel[J].Materials Science and Engineering A,2014,609:323-333.
• [26] Wang C,Chang Y,Yang J,et al.Work hardening behavior and stability of retained austenite for quenched and partitioned steels[J].Journal of Iron and Steel Research International,2016,23(2):130-137.
• [27] Sohrabi M J,Mirzadeh H,Sadeghpour S,et al.Grain size dependent mechanical behavior and TRIP effect in a metastable austenitic stainless steel[J].International Journal of Plasticity,2023,160:103502.

文章评论(Comment)：