退火工艺对铜/铝轧制复合板组织和性能的影响  

Effects of Annealing Process on Microstructure and Properties of Cu/Al Rolled Composite Plate

作　　者：熊桑 尚郑平 高欢 翟启杰[2] XIONG Sang;SHANG Zhenping;GAO Huan;ZHAI Qijie(Jiangsu Zhongse Composite Materials Co.,Ltd.,Wuxi 214000,China;School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China;School of Materials Science and Engineering,Nanjing Institute of Technology,Nanjing 211167,China)

机构地区：[1]江苏中色复合材料有限公司,江苏无锡214000 [2]上海大学材料科学与工程学院,上海200444 [3]南京工程学院材料科学与工程学院,江苏南京211167

出　　处：《热加工工艺》2022年第12期56-60,共5页Hot Working Technology

基　　金：江苏省自然科学基金-青年基金资助项目(BK20181026)。

摘　　要：针对热轧复合制备的Cu/Al复合板(Cu层占总厚度90%以上),通过正交试验研究不同的退火工艺对铜/铝轧制复合板组织和性能的影响。利用扫描电镜和能谱观察分析界面层的变化及界面元素的扩散,采用拉伸试验、导电率试验和剥离试验等测定复合带材的力学性能及其导电率。结果表明,铜/铝复合板带随退火温度和时间的增加,界面层厚度均增加,且最佳的退火工艺为380℃×10 h,界面层厚度达到14.17μm,剥离强度达到最大值,达到34 N/mm。XRD结果表明,界面层物相主要有Cu_(9)Al_(4)、Cu_(4)Al、Cu_(3)Al_(2)和CuAl_(2)。扩散退火处理降低了铜/铝复合材料的抗拉强度,增加其塑性,使导电率和剥离强度得到了改善。Cu/Al composite strip(Cu accounts for >90%) were used, the effects of different annealing process on the microstructure and properties of Cu/Al composite plate were studied by orthogonal experiment. The change of interface layer and the diffusion of interface elements were observed and analyzed by scanning electron microscope(SEM) and energy dispersive spectroscopy(EDS). The mechanical properties and conductivity of the composite strip were measured by tensile test, conductivity test and peeling test. The results show that the thickness of interface layer increases with the increase of annealing temperature and time, and the optimum annealing process is 380 ℃ ×10 h, the thickness of the interfacial layer reaches 14.17 μm, and the peeling strength reaches the maximum of 34 N/mm. XRD results show that Cu_(9)Al_(4),Cu_(4)Al,Cu_(3)Al_(2)and CuAl_(2) are the main phases in the interface layer. Diffusion annealing treatment reduces the tensile strength of Cu/Al composites, increases plasticity, and improves the conductivity and peeling strength.

关 键 词：铜/铝 复合材料 退火 剥离强度 

分 类 号：TB331[一般工业技术—材料科学与工程] TG335.8[金属学及工艺—金属压力加工]