电冲击预处理下的316不锈钢构筑成形界面愈合行为模拟与实验研究  

Simulation and experimental study on interface healing behavior of 316 stainless steel construction forming under electric shock pretreatment

作　　者：杨桢宇 韩天 邓加东[1,2,3] 钱东升[2,3] Yang Zhenyu;Han Tian;Deng Jiadong;Qian Dongsheng(School of Automotive Engineering,Wuhan University of Technology,Wuhan 430070,China;Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology,Wuhan 430070,China;Hubei Engineering Research Center for Green Precision Material Forming,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学汽车工程学院,湖北武汉430070 [2]武汉理工大学现代汽车零部件技术湖北省重点实验室,湖北武汉430070 [3]武汉理工大学湖北省材料绿色精密成形工程技术研究中心,湖北武汉430070

出　　处：《锻压技术》2024年第9期138-145,共8页Forging & Stamping Technology

基　　金：国家重点研发计划(2018YFA0702900);国家自然科学基金青年科学基金资助项目(51805391);高等学校学科创新引智计划(B17034);教育部创新团队发展计划(IRT_17R83);湖北省科技创新人才及服务专项(2022EJD012)。

摘　　要：为保证构筑界面的高质量连接,提出了在高温变形调控界面愈合的基础上引入电冲击前处理的方法来促进构筑界面的愈合,并通过对316不锈钢高温变形前进行电冲击预处理的仿真和实验,揭示电冲击前处理对构筑界面愈合程度的作用规律。研究结果表明,提高电冲击前处理时的电流密度,构筑成形试样界面的愈合效果逐步提高,但电冲击前处理的电流密度不宜过大,关键在于更大程度地实现构筑界面处的温度梯度变化,产生向中心挤压的热压应力,才能够促进构筑界面产生局部预连接。In order to ensure the high-quality connection of construction interface,a method of adding electrical shock pretreatment on the basis of high-temperature deformation controling interface healing was proposed to promote the healing of construction interface.Then,by simulations and experiments on the electrical shock pretreatment before high-temperature deformation of 316 stainless steel,the influence of electrical shock pretreatment on the degree of construction interface healing was revealed.The research results show that increasing the current density during electrical shock pretreatment gradually improves the construction interface healing effect of formed sample.However,when selecting the current density for electrical shock pretreatment should not be excessively high.The key is to achieve a greater degree of temperature gradient change at the construction interface and generate thermal compressive stress towards the center,which could promote local pre-connection at the construction interface.

关 键 词：电冲击 电流密度 构筑成形 界面愈合 316不锈钢 

分 类 号：TG306[金属学及工艺—金属压力加工]