A nickel-based self-fluxing hardfacing flux-cored welding wire for plasma surfacing

Abstract

The invention belongs to the field of welding materials, and particularly relates to a nickel-based self-fluxing hard-facing flux-cored wire for plasma surfacing. The flux-cored wire comprises all elemental components including, by weight, 0.3% to 1.0% of carbon, 14% to 19% of chromium, 3.5% to 5.0% of silicon, 3.0% to 4.5% of boron, 0% to 6% of iron and the balance nickel. The wire is prepared through the following method: a certain amount of chromium powder, boron powder, nickel powder and silicon and iron powder are weighed and sufficiently stirred to be evenly mixed, a Ni80Cr20 stainless steel strip bent into a U shape is filled with the mixed powder, curling and opening sealing are carried out, the strip is drawn down to the diameter of 2.0 stage by stage through a wire drawing machine, and the flux-cored wire is obtained. The nickel-based self-fluxing hard-facing flux-cored wire has the beneficial effects of being low in production cost, good in self-fluxing, high in surfacing efficiency, high in cladding rate and the like, and is suitable for plasma surfacing; a surfacing layer is large in combination strength and high in hardness and has the extremely high hard-faced wear resistance, abrasive particle wear resistance and erosive wear resistance properties.

Description

technical field [0001] The invention belongs to the field of welding materials, in particular to a nickel-based self-fluxing hard-surfacing flux-cored welding wire for plasma surfacing. Background technique [0002] The consumption of energy and materials caused by wear and corrosion is astonishing. Various countries have carried out detailed statistics on this. The loss caused by wear and corrosion alone accounts for 2-4% of the total output value of the national economy. The surface of materials and their components often fail due to wear, corrosion and oxidation. In order to prevent parts from being scrapped due to surface damage in high temperature, high pressure and corrosive medium working environments, improve the reliability of parts and prolong their life, many countries Efforts are being made to research and apply various technologies to improve surface properties. Among them, surfacing welding technology is more widely used because of its low cost, simple operati...

AI Technical Summary

Problems solved by technology

[0004] The invention aims at high production cost of Ni60 nickel-based surfacing alloy powder, low cladding efficiency, poor fluidity after being exposed to moisture, causing poor powder feeding and blockage, needing to be dried before use, and easy to stick to the plasma during the plasma spray welding process. Insufficient nozzles and tungsten electrodes, etc., the purpose is to provide a nickel-based self-fluxing surfacing welding wire for plasma surfacing welding