The process to produce self-shielde

The process to produce self-shielded metal-cored wires consisted offorming a metal strip sheath into a U-shaped channel, placing a fluxmixture within the channel, and forming the channel into a tubularconfiguration to mechanically wrap the mixture within the sheath. Themetal strip sheath surrounding the flux was then drawn through reducingdies to a specified wire diameter (2.8 mm). Table 1 shows the chemicalcomposition of the H08 A steel, having a thickness of 0.3 mm and a widthof 16 mm as the sheath. The core powders were composed of Mo powder,high carbon ferrochrome, electrolytic manganese, ferrosilicon, ferroboron and graphite powders. Table 2 shows the chemical compositions ofthe metal-core. The filling coefficient was 52 wt. %. In order to investigate the effects of Mo content on the microstructure and wear performance of iron-based self-shielded metal-cored hardfacing alloys, different mass fraction of pure Mo was added into the cored wire.