316L/Ni/EH40热轧不锈钢复合板界面组织演变及性能分析  

Microstructure Evolution and Properties Analysis of 316L/Ni/EH40 Hot Rolled Stainless Steel Clad Plate at Interface

作　　者：金贺荣[1,2] 张钊瑞 王宇韩 冯康康 宜亚丽[3] JIN Herong;ZHANG Zhaorui;WANG Yuhan;FENG Kangkang;YI Yali(Yanshan University,Key Laboratory of Advanced Forging and Stamping Technology and Science of Ministry of National Education,Qinhuangdao 066004,Hebei,China;Yanshan University,Parallel Robot and Mechatronic System Laboratory of Hebei Province,Qinhuangdao 066004,Hebei,China;Yanshan University,School of Mechanical Engineering,Qinhuangdao 066004,Hebei,China)

机构地区：[1]燕山大学先进锻压成型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：《船舶工程》2021年第5期121-128,共8页Ship 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(U1660111);中央引导地方科技发展资金项目(216Z1003G);河北省自然科学基金—高端钢铁冶金联合基金项目资助(E2020203033)。

摘　　要：为探究多道次热轧成形过程中316L/Ni/EH40不锈钢复合板界面微观组织演变和性能演变的规律,基于二辊轧机对复合板进行5道次热轧试验。对各道次轧后样件进行取样,采用金相显微分析技术对各道次轧后样件界面的微观组织进行观察,通过扫描电子显微镜对界面的孔洞情况进行分析,通过显微硬度测试对界面的硬度值分布进行测试,通过拉剪试验对界面结合强度进行分析。研究结果表明,随着累计轧制的进行,界面的孔洞逐渐闭合;压下量增大导致316L层的奥氏体晶粒得到细化,而在轧制过程中,EH40层的组织受轧制温度的影响发生变化;316L层和Ni层的硬度值随轧制的进行逐渐增大,EH40层的硬度值在第2道次后出现下降的趋势;复合板样件的结合强度在前4道次轧制时呈现明显增大的趋势,且5道次轧后相比4道次轧后并未出现明显的增大现象。In order to explore the evolution of the microstructure and properties of the 316L/Ni/EH40 stainless steel clad plate interface during the multi-pass hot-rolling forming process, 5 hot-rolling experiments on the clad plate are conducted based on a two-high rolling mill. The samples after each pass are collected, and the microstructure of the sample interface after each pass rolling is observed through the metallographic microanalysis technology. The hole of the interface is analyzed through the scanning electron microscope. The hardness value distribution of the interface is tested through the microhardness test and the interfacial bonding strength is analyzed by tensile shear test. Studies show that the hole of the interface gradually reduced with the cumulative rolling progresses. The increase of the reduction lead to the refinement of the austenite grains of the 316L layer, while the structure of the EH40 layer is affected by the rolling temperature during the rolling process The hardness value of the 316L and Ni layer side gradually increased with the rolling progress, and the hardness value of the EH40 side show a downward trend after the second pass. The bonding strength of the clad plate increase obviously in the first four passes, and it doesn’t increase significantly after five passes compared with the fourth pass.

关 键 词：不锈钢复合板 组织演变 孔洞闭合 力学性能 显微硬度 

分 类 号：U661.43[交通运输工程—船舶及航道工程]