摘要
为确定制备316L/EH40不锈钢复合板所需压下率,采用MSC.Marc有限元软件模拟研究了316L/EH40不锈钢复合板在不同压下率下的轧制过程,通过对变形区结合界面处应力场与应变场的综合分析,确定不锈钢复合板实现有效黏合的最小压下率为55%。基于有限元仿真结果,采用Gleeble-3800热模拟试验机制备了不同变形率下的复合样件,并对复合样件结合界面处的微观组织形貌进行了观测。通过分析得出结论,样件压下率达到30%后,结合界面处孔隙基本闭合,但仍有部分夹杂物和微孔存在;当压下率超过50%后,结合界面处微孔完全消失,夹杂物数量减少并且尺寸减小;低合金钢侧组织由铁素体和珠光体组成,靠近结合面处存在脱碳层,随着压下率的提高,脱碳层厚度逐渐降低;不锈钢侧由奥氏体组织组成,奥氏体晶粒尺寸随着压下率的提高得到不同程度的细化;显微硬度值随着压下率提高逐渐增大。
In order to determine the reduction rate required for the preparation of 316 L/EH40 clad plate,MSC.Marc software was applied to simulate the hot rolling process of 316 L/EH40 under different reduction rates.Based on the contrastive analysis of the stress and strain fields at the interface of the deformation zone,the minimum reduction rate of effective bonding of stainless steel clad plates is 55%.Based on the analysis results,the Gleeble-3800 thermal simulation test machine was used to prepare composite samples with different reduction rates.The interface structure of the sample was observed and analyzed,and conclusions are as follow:when the deformation of the sample reaches 30%,the pores near the interface are basically closed,but some inclusions and micropores still exist;when the deformation is more than 50%,the micropores at the interface disappear completely and the number of inclusions decreases and the size decreases;the microstructure of low alloy steel side is ferrite and pearlite,the decarbonization layer is distributed near the bonding surface and with the increase of reduction rate,the thickness of decarbonizing layer decreases gradually;the side of stainless steel consists of austenite structure,the grain size of austenite is refined with the increase of reduction rate and the microhardness value increases with the increase of reduction rate.
作者
金贺荣
韩民峰
段昌新
JIN He-rong;HAN Min-feng;DUAN Chang-xin(Key Laboratory of Advanced Forging and Stamping Technology and Science of Ministry of National Education,Yanshan University,Qinhuangdao 066004,Hebei,China;Parallel Robot and Mechatronic System Laboratory of Hebei Province,Yanshan University,Qinhuangdao 066004,Hebei,China;School of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,Hebei,China)
出处
《钢铁》
CAS
CSCD
北大核心
2019年第12期62-69,共8页
Iron and Steel
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)
关键词
不锈钢复合板
压下率
显微组织
元素扩散
stainless steel clad plate
reduction rate
microstructure
element diffusion
