镀锌钢压印接头热处理后拉剪强度及组织形态  

Tensile-Shear Strength and Microstructure After Galvanize Steel Clinched Joints Heat Treatment

作　　者：王医锋 何晓聪[1] 曾凯[1] 刘福龙[1] 

机构地区：[1]昆明理工大学机电学院,昆明650500

出　　处：《宇航材料工艺》2015年第5期62-65,共4页Aerospace Materials & Technology

基　　金：国家自然基金(50965009);昆明理工大学分析测试基金(20140974)

摘　　要：通过搭建局部热处理试验装置,对镀锌钢压印接头部位进行火焰淬火处理。然后对试件进行力学性能测试,制备金相试样观察分析经过局部热处理后接头显微组织,并对比热处理前后组织的显微硬度。结果表明:火焰淬火使接头失效时颈部撕裂程度变大;拉剪强度提高16.7%;经过火焰淬火处理接头部位材料组织呈现为板条状马氏体,该组织较未经过热处理的组织显微硬度提升了12.1%。In this paper, a thermal treatment apparatus was established to take local heat treatment on zinc-coa- ted clinched joints. Then mechanical test was conducted on the specimens under tensile-shear condition, and the met- allographic specimens were prepared to observe the metallographic structure of the clinched specimens with heat treat- ment. The micro-hardness of metallographic specimens with heat treatment and non-heat treatment were also meas- ured. The results exhibited that compared with the clinched specimens with non-heat treatment, local heat treatment largened the degree of joint neck tear and the static strength increased by 16.7%. The material structure of the clinched joints has changed from ferrite and pearlite to lath martensite after thermal treatment. In comparison to un- heated treatment, the micro-hardness of the new microstructure is increased by 12.1%.

关 键 词：压印接头 热处理 拉剪强度 显微组织分析 

分 类 号：TG162.8[金属学及工艺—热处理]