Iron-based powder alloy and argon arc surfacing technology utilizing same

Abstract

The invention relates to the field of material welding, in particular to an iron-based powder alloy and an argon arc surfacing technology utilizing the same. The argon arc surfacing technology is characterized in that Fe-V, Fe-B and powdered graphite are made into sheets, and an argon tungsten-arc welding machine is used for realizing surfacing on low carbon steel or low alloy steel. The formation of weld seams is excellent without pores, included slag and cracks, and the dilution rate of a transition layer is small, therefore, the argon arc surfacing technology can be effectively used in a repair technology for parts such as moulds, gears, shaft ends and the like. An argon arc welding clad layer of Fe-V, Fe-B and powdered graphite has fine grain size, disperse distribution of compounds and molten surface hardness up to 60 HRC.

Description

technical field

[0001] The invention relates to the field of material welding, in particular to an iron-based powder alloy and an argon arc surfacing technology using the alloy. Background technique

[0002] Mechanical parts usually fail in the form of corrosion and wear during use, resulting in deviations in the surface dimensions of the workpiece, seriously affecting the normal operation of the machine, and many production lines are forced to stop production to replace new parts, which not only reduces production efficiency, but also manufacturing The cost is also greatly increased. For example, fans, steam turbines, compressors, flue gas turbines, etc., which have a high failure rate in the petrochemical industry, are fan blades, steam turbine high-speed rotors, support tile journals, partitions, compressor rotor impellers, blades, journals, and smoke machines. Blades and discs are the main parts, and the main failure modes are gas erosion and corrosion; in the metallurg...

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