退火温度对镍/铜爆炸复合板微观组织与力学性能的影响  

Effects of annealing temperature on the microstructure and mechanical properties of Ni/Cu explosive composite plates

作　　者：陈慧杰 李慧中[1,2,3] 梁霄鹏[1,2,3] 陆雨晨 曾智恒 CHEN Huijie;LI Huizhong;LIANG Xiaopeng;LU Yuchen;ZENG Zhiheng(School of Materials Science and Engineering,Central South University,Changsha 410083,China;State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;Key Laboratory of Nonferrous Metal Materials Science and Engineering,Ministry of Education,Central South University,Changsha 410083,China;Hunan Phohom New Material Technology Co.,Ltd.,Changsha 410083,China)

机构地区：[1]中南大学材料科学与工程学院,长沙410083 [2]中南大学粉末冶金国家重点实验室,长沙410083 [3]中南大学有色金属材料科学与工程教育部重点实验室,长沙410083 [4]湖南方恒新材料技术股份有限公司,长沙410083

出　　处：《粉末冶金材料科学与工程》2023年第5期465-472,共8页Materials Science and Engineering of Powder Metallurgy

基　　金：国家自然科学基金资助项目(52274402)。

摘　　要：通过爆炸焊接工艺制备Ni/Cu层状复合板,通过光学显微镜、扫描电镜、电子探针和能谱仪以及拉伸、剪切和硬度实验,研究退火温度对Ni/Cu复合板显微组织和力学性能的影响规律。结果表明:随退火温度升高,复合板界面两侧Ni、Cu基体晶粒尺寸增大,界面元素扩散层厚度增加,退火温度为600℃时,元素扩散层厚度达到5.82μm。200℃退火后复合板的硬度分布相比于爆炸态变化不大,退火温度为400℃和600℃时,界面硬度(HV1)分别为65.1和66.1,明显低于爆炸态(160.2);爆炸态及200、400和600℃退火后复合板的抗拉强度分别为351.6、305.9、281.7和284.8 MPa,伸长率分别为2.6%、7.8%、39.1%和39.4%;退火温度为400℃时,复合板的剪切强度达到最大值,为191.3 MPa,比爆炸态提高了17.5 MPa。Ni/Cu laminated composite plates were fabricated by explosive welding.The effects of annealing temperature on the microstructure and mechanical properties of Ni/Cu composite plates were studied by optical microscope,scanning electron microscope,electron probe,and energy spectrometer,as well as tensile,shear,and hardness tests.The results show that with the increase of annealing temperature,the grain size of Ni and Cu matrix on both sides of the interface of the composite plate increases,and the thickness of the interface element diffusion layer increases.When the annealing temperature is 600℃,the thickness of the element diffusion layer reaches 5.82μm.The hardness distribution of the composite plate after annealing at 200℃has little change compared with that of the explosive state.When the annealing temperatures are 400℃and 600℃,the hardness(HV1)at the interface are 65.1 and 66.1,respectively,which are significantly lower than that in the explosive state(160.2).The tensile strength of the composite plates in explosive state and after annealing at 200,400,and 600℃are 351.6,305.9,281.7,and 284.8 MPa,respectively,with elongation of 2.6%,7.8%,39.1%,and 39.4%.When the annealing temperature is 400℃,the shear strength of the composite plate reaches the maximum value of 191.3 MPa,which is 17.5 MPa higher than that of the explosive state.

关 键 词：Ni/Cu复合板 爆炸焊接 退火处理 显微组织 力学性能 

分 类 号：TG456.6[金属学及工艺—焊接]