粉末套管法Ti/Al/Ti复合板的界面结合性能  

Interface Bonding Performance of Ti/Al/Ti Composite Plate by Powder-in-tube Method

作　　者：胡贤磊[1,2] 袁一 支颖 HUXianlei;YUANYi;ZHIYing(State Key Laboratory of Rolling and Automation,Northeast University,Shenyang 110819,China;Suzhou Dongbao Haixing Metal Materials Technology Co.,Ltd.,Zhangjiagang 215625,China)

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819 [2]苏州东宝海星金属材料科技有限公司,江苏张家港215625

出　　处：《热加工工艺》2024年第14期63-68,72,共7页Hot Working Technology

基　　金：中央高校基础研究基金项目(N2107014);辽宁省自然科学基金项目(2020-MS-079)。

摘　　要：采用粉末套管法,通过“热轧+中间退火+进一步冷轧”工艺制备Ti/Al/Ti复合板。利用扫描电镜、电子探针、能谱仪、XRD分析以及万能实验机,研究不同制备参数下Ti/Al/Ti复合带材的界面形貌、元素分布、物相种类和界面结合强度。结果表明,单一脆性金属间化合物TiAl_(3)的产生会阻碍Ti/Al元素的扩散,扩散层厚度发生减薄。500℃退火,扩散层主要是由扩散形成的冶金结合层,局部区域有少量的金属间化合物TiAl_(3)生成,界面结合强度受冶金结合强度与机械结合强度的动态变化影响,随着压下率升高,结合强度先降低后升高再降低;550℃退火,界面反应增强,TiAl_(3)相逐渐增多,扩散层强度增加,冶金结合强度提高,由14.3 N/mm(500℃)增加至35.1 N/mm(550℃),随着压下率的增大,化合物层破碎程度增加,界面结合强度逐渐降低。Ti/Al/Ti composite plate was prepared by powder-in-tube method through“hot rolling+intermediate annealing+further cold rolling”process.SEM,EPMA,EDS,XRD and universal testing machine were used to study the interface morphology,element distribution,phase type and interface bonding strength of Ti/Al/Ti composite strip under different preparation parameters.The results show that the formation of a single brittle intermetallic compound TiAl_(3)hinders the diffusion of Ti/Al elements and the thickness of the diffusion layer decreases.After annealing at 500℃,the diffusion layer is mainly a metallurgical bonding layer formed by diffusion,and a small amount of intermetallic compound TiAl_(3)is generated in the local area.The interfacial bonding strength is affected by the dynamic changes of metallurgical bonding strength and mechanical bonding strength.With the increase of reduction rate,the bonding strength first decreases,then increases and then decreases.After annealing at 550℃,the interfacial reaction is enhanced,TiAl_(3)phase gradually increases,the strength of diffusion layer increases,and the metallurgical bonding strength increases from 14.3 N/mm(500℃)to 35.1 N/mm(550℃).With the increase of reduction rate,the fragmentation degree of the compound layer increases,and the interfacial bonding strength gradually decreases.

关 键 词：Ti/Al/Ti复合板 粉末套管法 中间退火 结合性能 

分 类 号：TB331[一般工业技术—材料科学与工程]