工程科学学报，第40卷，第8期：945-953,2018年8月 Chinese Journal of Engineering,Vol.40,No.8:945-953,August 2018 DOI:10.13374/j.issn2095-9389.2018.08.008;http://journals.ustb.edu.cn 协变相变组织原始奥氏体取向重构及其在奥氏体李晶 中的应用 王智权123)，宋婷婷34)，由 洋35)，王学林3)，尚成嘉)区，刘 锟12) 陈斌12) 1)首钢技术研究院薄板研究所，北京1000432)北京市能源用钢工程技术研究中心，北京100043 3)北京科技大学钢铁共性技术协同创新中心，北京1000834)上海海洋大学深渊科学技术研究中心，上海201206 5)壹胜百模具（北京）有限公司.，北京214429 ☒通信作者，E-mail:cishang(@usth.edu.cn 摘要基于电子背散射衍射(EBSD)技术，利用极射赤面投影图，提出了一种不依赖于残余奥氏体，对协变相变产物的原奥 取向进行重构的简易方法.计算结果表明，利用铁素体的{110}。极图中三个贝恩组的交点可以成功重构出原始奥氏体取向， 并且精度可达2°：同时，该方法还可以对局部微区或者变体选择很严重的原奥取向进行重构，误差仍可控制在2°之内，具有其 他重构方法无可比拟的优点.位向关系具体种类并不影响对原奥取向的重构，采用该方法进行原奥取向重构时不需要预先知 道具体的位向关系，并且适用于位向关系处在K-S与N-W关系之间的所有协变相变过程.通过运用该方法重构原奥取向， 本文研究了高温奥氏体化过程中的奥氏体行为.研究发现当采用较高的温度奥氏体化时会出现奥氏体李晶，奥氏体李晶的出 现与奥氏体化温度有关. 关键词原始奥氏体：协变相变：取向重构：极图：变体：奥氏体李品 分类号TG142.3 Prior austenite orientation reconstruction of coherently transformed products and its application on austenite twinning WANG Zhi-quan'2),SONG Ting-ting),YOU Yang3),WANG Xue-lin),SHANG Cheng-jia,LIU Kun'),CHEN Bin'2) 1)Sheet Metal Research Institute,Shougang Research Institute of Technology,Beijing 100043,China 2)Beijing Engineering Research Center of Energy Steel,Beijing 100043,China 3)Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China 4)Hadal Science and Technology Research Center,Shanghai Ocean University,Shanghai 201206,China 5)ASSAB Tooling Beijing Co..Lid.,Beijing 214429.China Correspondent author,E-mail:cjshang@ustb.edu.en, ABSTRACT High-angle grain boundaries and martensite/austenite (M/A)constituents are two critical factors that contribute to low impact toughness in metals.The generation mechanism of the high-angle grain boundaries is closely related to the crystallography of the transformed products,which are transformed by prior austenite.Austenite undergoes phase transformation when cooled to ambient tem- perature and cannot be retained.During coherent phase transformation,variant pairs,from which the high-angle grain boundaries origi- nate,are transformed.Variant selection is a common phenomenon in coherent phase transformation.The properties of the prior austen- ite grain,such as its shape,size,orientation,texture,and particularity of formation,will affect the subsequent phase transformation dramatically,and the variant pairs are accordingly introduced.However,it is impossible to evaluate this effect when the prior austenite 收稿日期：2017-07-25工程科学学报,第 40 卷,第 8 期:945鄄鄄953,2018 年 8 月 Chinese Journal of Engineering, Vol. 40, No. 8: 945鄄鄄953, August 2018 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2018. 08. 008; http: / / journals. ustb. edu. cn 协变相变组织原始奥氏体取向重构及其在奥氏体孪晶 中的应用 王智 权1,2,3) , 宋 婷 婷3,4) , 由 洋3,5) , 王 学 林3) , 尚 成 嘉3) 苣 , 刘 锟1,2) , 陈 斌1,2) 1) 首钢技术研究院薄板研究所, 北京 100043 2) 北京市能源用钢工程技术研究中心, 北京 100043 3) 北京科技大学钢铁共性技术协同创新中心, 北京 100083 4) 上海海洋大学深渊科学技术研究中心, 上海 201206 5) 壹胜百模具(北京)有限公司, 北京 214429 苣 通信作者, E鄄mail: cjshang@ ustb. edu. cn 摘 要 基于电子背散射衍射(EBSD)技术,利用极射赤面投影图,提出了一种不依赖于残余奥氏体,对协变相变产物的原奥 取向进行重构的简易方法. 计算结果表明,利用铁素体的{110} 琢极图中三个贝恩组的交点可以成功重构出原始奥氏体取向, 并且精度可达 2毅;同时,该方法还可以对局部微区或者变体选择很严重的原奥取向进行重构,误差仍可控制在 2毅之内,具有其 他重构方法无可比拟的优点. 位向关系具体种类并不影响对原奥取向的重构,采用该方法进行原奥取向重构时不需要预先知 道具体的位向关系,并且适用于位向关系处在 K鄄鄄 S 与 N鄄鄄W 关系之间的所有协变相变过程. 通过运用该方法重构原奥取向, 本文研究了高温奥氏体化过程中的奥氏体行为. 研究发现当采用较高的温度奥氏体化时会出现奥氏体孪晶,奥氏体孪晶的出 现与奥氏体化温度有关. 关键词 原始奥氏体; 协变相变; 取向重构; 极图; 变体; 奥氏体孪晶 分类号 TG142郾 3 收稿日期: 2017鄄鄄07鄄鄄25 Prior austenite orientation reconstruction of coherently transformed products and its application on austenite twinning WANG Zhi鄄quan 1,2,3) , SONG Ting鄄ting 3,4) , YOU Yang 3,5) , WANG Xue鄄lin 3) , SHANG Cheng鄄jia 3) 苣 , LIU Kun 1,2) , CHEN Bin 1,2) 1) Sheet Metal Research Institute, Shougang Research Institute of Technology, Beijing 100043, China 2) Beijing Engineering Research Center of Energy Steel, Beijing 100043, China 3) Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China 4) Hadal Science and Technology Research Center, Shanghai Ocean University, Shanghai 201206, China 5) ASSAB Tooling Beijing Co. , Ltd. , Beijing 214429, China 苣 Correspondent author, E鄄mail: cjshang@ ustb. edu. cn, ABSTRACT High鄄angle grain boundaries and martensite / austenite (M/ A) constituents are two critical factors that contribute to low impact toughness in metals. The generation mechanism of the high鄄angle grain boundaries is closely related to the crystallography of the transformed products, which are transformed by prior austenite. Austenite undergoes phase transformation when cooled to ambient tem鄄 perature and cannot be retained. During coherent phase transformation, variant pairs, from which the high鄄angle grain boundaries origi鄄 nate, are transformed. Variant selection is a common phenomenon in coherent phase transformation. The properties of the prior austen鄄 ite grain, such as its shape, size, orientation, texture, and particularity of formation, will affect the subsequent phase transformation dramatically, and the variant pairs are accordingly introduced. However, it is impossible to evaluate this effect when the prior austenite