Nickel-based self-fluxing hard-facing flux-cored wire for plasma surfacing

A nickel-based self-melting and plasma stacking technology, which is applied in plasma welding equipment, welding media, welding equipment, etc., can solve the problems of easy sticking to the plasma nozzle, low cladding efficiency, poor fluidity, etc., and achieve strong and hard resistance Surface wear, high surfacing welding efficiency, and high material utilization

Inactive Publication Date: 2017-01-04
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

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Effect test

Embodiment 1

[0017] A nickel-based self-fluxing hardfacing flux-cored welding wire for plasma surfacing, the components of each element are: carbon 0.04%; chromium 17.34%; silicon 4.79%; boron 4.5%; iron 5.7%; the balance for nickel. Among them, the carbon in the nickel-based self-fluxing hardfacing flux-cored welding wire composition is the carbon in the Ni80Cr20 stainless steel strip and the carbon in the ferrosilicon; the chromium in the nickel-based self-fluxing hardfacing flux-cored welding wire composition is over 150 Chromium powder of ~200 mesh sieve and chromium in Ni80Cr20 stainless steel strip; boron in the composition of nickel-based self-fluxing hardfacing flux-cored wire is boron powder passing through 180-220 mesh sieve, nickel-based self-fluxing hardfacing The nickel in the flux-cored wire composition is the nickel powder passing through the 150-200 mesh sieve and the nickel in the Ni80Cr20 stainless steel strip; the silicon in the nickel-based self-fluxing hardfacing flux-...

Embodiment 2

[0019] A nickel-based self-fluxing hardfacing flux-cored welding wire for plasma surfacing, each component by weight percentage is: carbon 0.03%; chromium 16.38%; silicon 4.57%; boron 4.26%; iron 2.28%; nickel. Among them, the carbon in the nickel-based self-fluxing hardfacing flux-cored welding wire composition is the carbon in the Ni80Cr20 stainless steel strip and the carbon in the ferrosilicon; the chromium in the nickel-based self-fluxing hardfacing flux-cored welding wire composition is over 150 Chromium powder of ~200 mesh sieve and chromium in Ni80Cr20 stainless steel strip; boron in the composition of nickel-based self-fluxing hardfacing flux-cored wire is boron powder passing through 180-220 mesh sieve, nickel-based self-fluxing hardfacing The nickel in the flux-cored wire composition is the nickel powder passing through the 150-200 mesh sieve and the nickel in the Ni80Cr20 stainless steel strip; the silicon in the nickel-based self-fluxing hardfacing flux-cored weld...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K10/02
Inventor 周建军易铁祝名山
Owner WUHAN UNIV OF TECH
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