Study on welded metal properties of high carbon cast self-shielded flux cored wire with Nb and Mo

The paper studied the microstructures morphology, and the discrimination in hardness and wearability of welded metal with the addition of Nb,Mo by optical microscope and SEM. The results showed that the number of primary carbide, macrohardness and wearability were increased with the increasing the contents of Nb, Mo. Nb only resulted in NbC to strength welded metal, and but this strengthen was better;Mo not only resulted in Mo₂C but also in the primary carbide and matrix, but this strengthen was weaker than that of Nb. In order to get better wear resistance and economic benefit, it should optimize the contents of alloys and strengthen both carbide and matrix.