摘要
通过扫描电镜观察分析焊接熔渣的微观结构及成分构成,试验研究了熔渣的密度及粘度并分析了其影响因素;利用万能试验机测定了焊接接头的力学性能。结果表明:添加造渣剂明显改善了渣液分离效果及焊接效果,熔渣可迅速从金属熔池中上浮并覆于上方,焊道成型比较美观;焊接熔渣主要是由A12O3、CaO、SiO2等组分组成的均相玻璃状物质,A12O3含量高达60%;焊接接头的抗拉强度>420 MPa,高于母材本身的强度。
The microstructure and chemical composition of fluxing medium were studied by SEM. The density and viscosity of the fused slag were tested. The mechanical property of the welded joint was tested by universal test machine. The results indicate that the scoring ability of adding slagging constituent is wonderful. The fused slag coveting on welding bead can emerge quickly from welding pool coveting over; the fused slag with A1203, CaO and SiO2 is homogeneous glasslike compound. The content of the A1203 can reach 60%. The tensile strength of the welded joint is greater than 420 MPa, which is higher than base metal.
出处
《热加工工艺》
CSCD
北大核心
2013年第7期194-195,197,共3页
Hot Working Technology
关键词
造渣剂
微观结构
力学性能
slagging constituent
microstructure
mechanical property
