摘要
选取铜合金H62同种组合及与AA5052铝合金和Q215镀锌钢的异种组合进行压印-粘接复合连接,制作T型接头用于剥离试验,对接头失效断口进行SEM电镜扫描。结果表明：铜合金同/异质板材组合压印-粘接复合连接接头的抗剥离强度由粘接剂和压印结构共同承担,失效模式主要由压印结构决定。H62-H62接头的抗剥离强度均值可达到943.05N,在三组接头中最高,能量吸收均值达到11 J,接头为下板拉脱失效并伴随压印点擦伤;H62-镀锌钢接头为上板撕裂失效,缓冲吸震能力最佳,为H62-H62接头的2.3倍。H62-AA5052接头出现下板拉脱和上板撕裂两种失效模式,剥离性能不稳定。
The clinch-bonding hybrid connection of H62copper alloy similar sheets and dissimilar sheets of H62copper alloy with 5052aluminum alloy and Q215 galvanized steel was carried out, and the T-joints were prepared for the peeling test. The failure fracture was observed by using scanning electron microscope. The results show that the peeling strength of clinch-bonding hybrid T-joints of copper alloy similar and dissimilar sheets is bore by adhesive and clinched structure, and the failure mode is primarily detemined by the clinched joint structure. For clinch-bonding hybrid T-joints, the average peeling strength of H62-H62 joints reaches 943.05N which is the biggest, the energy absorption value is 11 J and the failure mode is bottom sheet＇s separation with the clinch joint＇s scratch. The failure mode of the H62-galvanized steel T-joints is upper sheet tearing fracture, and the energy absorption is the best, which is 2.3 times of that of the H62-H62 T-joints. The peeling properties of H62-AA5052 T-joints present instability, which have two failure modes of bottom sheet＇s separation and upper sheet tearing fracture.
出处
《热加工工艺》
CSCD
北大核心
2018年第1期66-69,74,共5页
Hot Working Technology
