摘要
采用EBSD技术对自主研发A焊丝与国内B焊丝、国外C焊丝的成分、择优取向、晶粒尺寸、表面质量以及焊丝内部夹杂物含量进行对比评价焊丝质量.结果表明,通过优化焊丝成分与工艺,A、B、C三种焊丝横纵截面均存在<111>丝织构和<100>丝织构,织构密度呈现出A<B<C.A焊丝纵截面再结晶晶粒与回复晶粒数之和占总晶粒数的33.45%,B焊丝纵截面再结晶晶粒数+回复晶粒数为9.45%,而C焊丝横截面再结晶晶粒数加回复晶粒数为12.21%,呈现出A>C>B.晶粒尺寸评级为A焊丝G12.0、B焊丝G12.5、C焊丝G13.0,呈现出C>B>A.A焊丝三维粗糙度为4.30 μm,B焊丝三维粗糙度为4.76 μm,C焊丝三维粗糙度为5.29 μm,表面质量呈现A优于B优于C;A焊丝夹杂物评级为D0.5的视场数为2,B、C焊丝夹杂物评级为D1的视场数均为7,并且存在D1e类粗细夹杂的视场数为1.综合评估A焊丝品质优于B、C焊丝.
Abstract
In this paper,the preferred orientation,grain size,surface quality and inclusions content of the A wire were com-pared with the domestic B wire and foreign C wire by EBSD technique.The results show that,by optimizing the composi-tion and process of welding wire,the section of A,B and C wires have<111>and<100>wire texture,and the texture den-sity sorting as A＜B＜C.The sum of recrystallized grains and the number of recovery grains in the longitudinal section of A wires accounted for 33.45%of the total number of grains,and the number of recrystallized grains in the longitudinal section of B wires plus the number of recovery grains was 9.45%,whereas the number of recrystallized grains and the number of re-covery grains in the cross section of C wires was 12.21%,sorting as A＞C＞B.The grain size grade of A,B,C wire is G12.0,G12.5,G13.0 respectively,sorting as C＞B＞A.The 3D roughness of A,B,C wire is 4.30 μm,4.76 μm,5.29 μm re-spectively,and the surface quality of A is the best and B is better than C.A wire with an inclusion rating of D0.5 has a field of view of 2.B,C wire with an inclusions rating of D1 has a field of view of 7,and there is a D1e class of coarse and fine in-clusions in one field of view.Comprehensive assessment of the quality of the A wire is better than that of the B,C wire.
维普
万方数据