A tube composite welding rod of new type was made from the coated diamond(GB/T6405-94 MBD4 70/80),the hard alloy(YQ4) and the pre-alloyed powder Ni+B+Si.
采用经Ti-Ni复合镀覆处理的GB/T6405-94标准MBD4型70/80目人造金刚石和优选的YQ4型球形硬质合金,并加入焊接性能良好的Ni+B+Si合金粉末制备出新型管装复合焊条,其焊皮材料为Cu基新型焊片。