摘要
随着现代工业的快速发展,对高性能材料的需求日益增加,钛/双相不锈钢复合板凭借其卓越的耐腐蚀性能,展现了广泛的应用前景。本研究通过爆炸焊接制备了TP270C钛合金/SUS821L1高强度双相不锈钢的双金属复合板,并采用金相显微镜、扫描电子显微镜(SEM)、能量色散X射线光谱(EDS)和电子背散射衍射(EBSD)等技术,对复合板的界面微观特征进行了深入分析。此外,还结合力学性能测试对焊接质量进行了评估。研究结果表明:界面沉积能量较低时,焊接界面介于平直界面和波状界面之间;而当界面沉积能量较高时,焊接界面呈波状。两者界面附近均出现了元素扩散和晶粒细化现象。在焊接界面、熔化区域以及绝热剪切带内以完全再结晶为主;靠近焊接界面的位置,钛以部分再结晶为主,双相不锈钢以部分再结晶和变形晶为主。局部热积累促进了熔化层内晶粒的长大,然而,被熔化层“包裹”的钛颗粒出现了晶粒细化。在力学性能测试中,界面沉积能量较高的样品抗剪强度和抗弯强度相对于界面沉积能量较低的样品分别提升了40.33%和4.52%。
With the rapid advancement of modern industry,the demand for high-performance materials has grown significantly.Titanium/duplex stainless steel composite plates,known for their exceptional corrosion resistance,demonstrate vast potential for diverse applications.In this study,a bimetallic composite plate comprising TP270C titanium alloy and SUS821L1 high-strength duplex stainless steel was fabricated using explosive welding.The microstructural characteristics of the composite plate interface were thoroughly investigated through metallographic microscopy,scanning electron microscopy(SEM),energy dispersive X-ray spectroscopy(EDS),and electron backscatter diffraction(EBSD).Additionally,the welding quality was systematically evaluated.The results showed that the welded interface exhibited an intermediate structure between flat and wavy when the interface deposition energy was low.In contrast,the welded interface displayed a wavy structure at higher interface deposition energy.Element diffusion and grain refinement were observed in the regions adjacent to both interfaces.Complete recrystallization predominated in the welded interface,molten zone,and adiabatic shear band.Near the welded interface,titanium underwent partial recrystallization,while duplex stainless steel exhibited a combination of partial recrystallization and deformed grains.Localized thermal accumulation facilitated grain growth in the molten layer,whereas titanium particles encapsulated within the molten layer exhibited refined grain structures.Mechanical performance tests indicated that the sample with higher interface deposition energy achieved a 40.33%increase in shear strength and a 4.52%improvement in bending strength compared to the sample with lower interface deposition energy.
作者
刘金涛
朱桂春
黄佳雯
陈令杰
韩刚
陈翔
LIU Jin-tao;ZHU Gui-chun;HUANG Jia-wen;CHEN Ling-jie;HAN Gang;CHEN Xiang(Luoyang Ship Material Research Institute,Luoyang 471023,China;National Key Laboratory of Marine Corrosion and Protection,Luoyang 471023,China;State Key Laboratory of Fine Blasting,Jianghan University,Wuhan 430056,China;Hubei Institute of Explosion and Blasting Technology,Wuhan,430056,China)
出处
《爆破》
北大核心
2025年第1期133-141,150,共10页
Blasting
基金
湖北省教育厅重点项目(D20234406)
国家自然科学基金项目(No.12302436)。
关键词
爆炸焊接
钛/钢复合板
界面形貌
力学性能
电子背散射衍射(EBSD)
explosive welding
Titanium/steel composite plate
interface morphology
mechanical properties
electron backscatter diffraction(EBSD)
作者简介
刘金涛(1985-),男,高级工程师,河南省周口市,从事层状金属复合材料加工及应用研究,(E-mail)liujintao725@163.com;通讯作者:陈翔(1990-),男,安徽省淮南市,博士、副教授,从事爆炸与冲击动力学效应、爆炸加工理论及应用方向的研究,(E-mail)chenxiang@jhun.edu.cn。
