加热温度对AZ31镁合金薄板压力连接接头性能的影响  

Effect of Heating Temperature on Clinching Joint of AZ31 Magnesium Sheets

作　　者：石柏军[1] 李航[1] 彭松[1] 廖树辉 

机构地区：[1]华南理工大学机械与汽车工程学院,广州510640

出　　处：《机械工程材料》2013年第12期27-30,34,共5页Materials For Mechanical Engineering

基　　金：广东省部产学研结合项目(2009B090300070)

摘　　要：采用凹模加热法对1mm厚的AZ31镁合金薄板进行加热，加热温度区间为150～375℃，然后进行压力连接试验，并采用剪切和拉伸剥离两种试验方法对各组接头的连接强度进行测试。结果表明：适合AZ31镁合金压力连接的凹模温度区间是250～350℃，温度过低接头会出现颈部断裂，温度过高会产生底部穿孔现象，最佳凹模温度在300℃左右；在300℃条件下压接AZ31镁合金，其接头十字剥离最大承载力为600N，而剪切最大承载力达到了1600N，连接强度较高。Clinching tests were carried out after AZ31 magnesium alloy sheets in thickness of l mm were heated by female die heating at temperature range of 150-375℃. The joint strength was tested using shear test and tensile test. The results show that the suitable range of die temperature was 250℃ to 350℃. If the temperature was too low, fracture in the neck would happen. If the temperature was too high, hole punching in the bottom of joints would be found. And the best die temperature was around 300℃ at which the joint strength was the highest. The normal bearing force of the joint clinched at 300℃ was 600 N and the shear bearing force was 1 600 N.

关 键 词：压力连接 AZ31镁合金 凹模加热法 强度 

分 类 号：TG386[金属学及工艺—金属压力加工]