Because the process parameters of the flux cored wire are small, it is optimized in the test; its welding process performance is excellent, such as stable arc burning, good bead forming, less spatter, few pores, and dense weld overlay. Shrinkage, a small amount of slag points on the surface, no cleaning does not affect continuous multi-layer welding, soot is not large, low noise. The stability of the arc and the degree of splashing are outstanding compared to similar products.
The same flux cored wire differs greatly in the welding process performance due to the different welding equipment used under the same welding specifications. The surface of the surfacing layer and the metallographic structure of the cross-section of the flux-cored wire were analyzed by scanning electron microscopy. The microstructure of the flux-cored wire surfacing layer was similar, all of which were hypereutectic, and the shape was evenly distributed on the Leysite matrix. Regular primary carbides. The amount of carbide in the flux cored wire is large and evenly distributed.
The primary carbide particles are large, have a thin rod shape, have obvious directionality and the growth direction is perpendicular to the working surface; the eutectic carbide is relatively fine and the directionality is not obvious; the matrix is martensite and retained austenite. Compared with similar products, the microstructure of the flux cored wire surfacing layer is more optimized, which is very beneficial to improve the wear resistance of the surfacing layer.