多道次热轧不锈钢复合板热力耦合模拟及实验研究  

Thermo-mechanical coupling simulation and experimental research of stainless steel clad plate in multi-pass hot rolling

作　　者：金贺荣[1,2] 张磊 JIN He-rong1,2, ZHANG Lei 3(1. Key Laboratory of Advanced Forging and Stamping Technology and Science of Ministry of National Education, Yanshan University, Qinhuangdao 066004, China; 2. Parallel Robot and Mechatronic System Laboratory of Hebei Province, Yanshan University, Qinhuangdao 066004, China; 3. School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China)

机构地区：[1]燕山大学先进锻压成形技术与科学教育部重点实验室,河北秦皇岛066004 [2]燕山大学河北省并联机器人与机电系统实验室,河北秦皇岛066004 [3]燕山大学机械工程学院,河北秦皇岛066004

出　　处：《塑性工程学报》2018年第5期158-165,共8页Journal of Plasticity Engineering

基　　金：国家自然科学基金委员会-宝钢集团有限公司钢铁联合研究基金资助项目(U1660111);河北省高等学校科学技术研究资助项目(ZD2017076);河北省自然科学基金-钢铁联合研究基金资助项目(E2014203118)

摘　　要：采用热力耦合数值模拟与实验研究相结合研究了多道次热轧不锈钢复合板成形过程。通过对7道次热轧过程的仿真,得到了基层、复层以及界面处的温度变化曲线,明晰了多道次轧制下复合板等效应力变化规律,揭示了轧后基层和复层界面处的残余应力分布状态。利用对称组坯技术制备了不锈钢复合板真空热轧坯料,基于数值分析结果进行复合板真空热轧实验。采用金相显微镜和能谱仪观察了试样基层、复层、界面组织形貌,分析了沿轧件厚度方向微观组织分布不均的原因,并进行了界面元素扩散分析,得到了不锈钢复合板界面处的主要扩散元素,对数值模拟结果进行了验证,为不锈钢复合板制备提供了参考。The forming process of multi-pass hot rolling stainless steel clad plate was analyzed by thermo-mechanical coupling numerical simulation combined with experiment. Through the simulation of seven passes hot rolling process,the temperature change curves of the substrate,cladding layer and interface were obtained. Moreover,the equivalent stress change laws of clad plate in each pass were presented. Thus the residual stress distribution of substrate and cladding layer interface after rolling was revealed. Vacuum hot rolled billets for stainless steel clad plate were prepared by symmetrical billet technology,and the vacuum hot rolling experiment for clad plate was carried out according to the numerical simulation results. The microstructures of the substrate,cladding layer and interface were observed by metallurgical microscope and energy spectrometer. The reasons for uneven distribution of microstructure along the thickness direction of rolled piece were analyzed. In addition,the interfacial element diffusion analysis was also carried out. The main diffusion elements at the interface of stainless steel clad plate were obtained. The results of numerical simulation were verified to provide reference for the preparation of the stainless steel clad plate.

关 键 词：不锈钢复合板 数值模拟 多道次热轧 热力耦合 微观组织 

分 类 号：TG335[金属学及工艺—金属压力加工]