摘要
通过金相、扫描、硬度及拉伸试验等测试分析手段,对自制焊丝(1#)、国产焊丝(2#)和进口焊丝(3#)3种5356铝合金焊丝的表面质量、显微组织以及力学性能进行了对比分析研究。试验结果表明:由于成分配比、杂质含量、加工方法等原因,3#焊丝表面均匀光滑,无裂纹、划痕等显著缺陷,表面质量和力学性能最优;1#焊丝表面存在细微裂纹,晶粒细小均匀分布,表面质量和力学性能次之;2#焊丝表面粗糙,有凹坑及麻点等缺陷,表面质量和力学性能最差。
An experimental comparative investigation has been made of the surface quality, microstructure and me- chanical properties of three different types of aluminum alloy welding wires, namely, self-made wires （1 #）, domestic wires （2#） and imported wires （3#） by using such testing methods as microscopy, scanning, hardness test and tensile test, etc. The experimental results show that, due to their different component ratios, impurity contents, and processing methods, 3# welding wires exhibit such excellent properties as optimum surface quality and mechanical properties, lacking of such obvious defects as cracks and scratches. Fine cracks can be found on the surface of 1# wire with fine grains uniformly distributed, thus making its surface quality and mechanical properties slightly inferior; 2# wire is characterized with such defects as pits and pittings on a rough surface, thus making it the most inferior as regard to its surface quality and mechanical properties.
出处
《湖南工业大学学报》
2016年第5期92-96,共5页
Journal of Hunan University of Technology
关键词
5356铝合金焊丝
连续挤压
微观组织
力学性能
5356 aluminum alloy welding wires
continuous extrusion
micro-structure
mechanical properties
