Self-protection open arc surfacing welding austenite matrix flux-cored wire and application method thereof

A technology of flux-cored welding wire and austenite, which is applied in the field of self-shielding open-arc surfacing welding austenitic matrix flux-cored wire to achieve good thermal strength, small thermal stress and strain, and good high-temperature oxidation resistance.

Active Publication Date: 2017-11-21
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the purposes of the present invention is to address the above-mentioned defects in the prior art, to provide an anti-friction machine with excellent wear resistance, which can also be used in complex wear condi

Method used

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  • Self-protection open arc surfacing welding austenite matrix flux-cored wire and application method thereof
  • Self-protection open arc surfacing welding austenite matrix flux-cored wire and application method thereof
  • Self-protection open arc surfacing welding austenite matrix flux-cored wire and application method thereof

Examples

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Example Embodiment

[0035] Example 1:

[0036] During production, weigh high-carbon ferrochrome, ferro-niobium, flake graphite, ferrosilicon, ultra-fine graphite, ultra-fine aluminum powder and other alloy powders according to the powder core composition requirements of the above-mentioned flux-cored welding wire. Among them, ultra-fine graphite is also It needs to go through a 500-mesh sieve, and the ultra-fine aluminum powder also needs to go through a 300-mesh sieve, and then all powders are passed through a 60-mesh sieve. All the components are mixed evenly, and the mixed powder is poured into a stainless steel tray, spread out and the powder accumulation height does not exceed 15mm, put it into the drying furnace to raise the temperature to 70~80℃ and keep it for 2 hours, and then cool it to 30℃ and take it out. Immediately afterwards, the mixed powder was pressed into a YHZ-1 flux-cored wire forming machine manufactured by Tianjin Sanying Welding Co., Ltd. The outer sheath of the flux-cored w...

Example Embodiment

[0041] Example 2:

[0042] During production, weigh high-carbon ferrochrome, ferro-niobium, flake graphite, ferrosilicon, ultra-fine graphite, ultra-fine aluminum powder and other alloy powders according to the composition ratio requirements of the above-mentioned flux-cored wire powder core. Among them, ultra-fine graphite is also It needs to go through a 500-mesh sieve, and the ultra-fine aluminum powder also needs to go through a 300-mesh sieve, and then all the powder is passed through a 60-mesh sieve. All the components are mixed evenly, and the mixed powder is poured into the stainless steel tray, spread out and the powder accumulation height does not exceed 15mm, put it into the drying furnace, heat up 70~80℃ and keep it for 2 hours, then cool it to 30℃ and take it out. Immediately afterwards, the mixed powder was pressed and formed on the YHZ-1 flux-cored welding wire forming machine manufactured by Tianjin Sanying Welding Co., Ltd. The outer sheath of the flux-cored wel...

Example Embodiment

[0044] Example 3:

[0045] During production, weigh high-carbon ferrochrome, ferro-niobium, flake graphite, ferrosilicon, ultra-fine graphite, ultra-fine aluminum powder and other alloy powders according to the composition ratio requirements of the above-mentioned flux-cored wire powder core. Among them, ultra-fine graphite is also It needs to go through a 500-mesh sieve, and the ultra-fine aluminum powder also needs to go through a 300-mesh sieve, and then all powders are passed through a 60-mesh sieve. All the components are mixed evenly, and the mixed powder is poured into a stainless steel tray, spread out and the powder accumulation height does not exceed 15mm, put it into the drying furnace, heat up 70~80℃ and keep it for 2 hours, then cool it to 30℃ and take it out. Immediately afterwards, the mixed powder was pressed into a YHZ-1 flux-cored wire forming machine manufactured by Tianjin Sanying Welding Co., Ltd. The outer sheath of the flux-cored welding wire is H08A cold-...

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Abstract

The invention discloses a self-protection open arc surfacing welding austenite matrix flux-cored wire and an application method thereof. The flux-cored wire is characterized in that an H08A cold rolling thin steel strip serves as outer layer skin, high carbon ferro-chrome, ferroniobium, ferrosilicon, micro-fine graphite, ultra-refining aluminum powder and other metal powder are used in cooperation to form a powder core, and a surfacing alloy with the organization structure that austenite serves as a matrix, separated-out thick NbC serves as a main wear-resisting phase and along-grain dispersed distributed M23C6 type carbide serves as an auxiliary wear-resisting phase is formed. The micro-fine graphite in the powder core is dried at 70 DEG C to 80 DEG C for two hours, and therefore micro-fine graphite particles sufficiently absorb a certain amount of air, and the micro-fine graphite particles have certain flammability; explosive of the particles stimulates Al2O3 to form micro-fine smoke which is expelled and removed under the electric arc blow force effect, but the explosive power cannot expel other thick component particles, welding lines with extremely-small residue amount are obtained, the excellent abrasive resistance is achieved, the self-protection open arc surfacing welding austenite matrix flux-cored wire can be used for medium-high temperature, impulse load frequency changes and other complex abrasion conditions, and air holes are not generated during surfacing welding.

Description

technical field [0001] The invention belongs to the technical field of surfacing welding flux-cored welding wire, and in particular relates to a self-protected open-arc surfacing welding austenitic matrix flux-cored welding wire which can be used for parts requiring wear-resisting grains and wear in medium-high temperature and re-variable load conditions and its application method. Background technique [0002] As an economical and reliable process, the self-shielded open arc welding method of flux cored wire is applied to the rapid manufacturing and remanufacturing of wear-resistant alloy layers of advanced mechanical parts, such as: coal grinding rollers, lining plates and crusher tooth heads, etc. However, when the above-mentioned parts are crushed, the impact load on the wear surface often changes frequently due to excessive fluctuations in the hardness of the powder, and the brittle metamorphic eutectic contained in the wear-resistant alloy is very easy to crack, causin...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/3086B23K35/406
Inventor 龚建勋张立成姚惠文马蓦
Owner XIANGTAN UNIV
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