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A self-shielded open arc surfacing welding austenitic matrix flux-cored wire and its application method

A technology of flux-cored welding wire and austenite, which is applied in the field of self-shielded open-arc surfacing welding of austenitic matrix flux-cored welding wire, and achieves the effects of good thermal strength, wide working condition range, and small microstructure temperature transformation stress.

Active Publication Date: 2019-03-12
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 conditions such as medium and high temperature and frequent impact loads, and does not generate pores during surfacing welding. An economical self-shielded open-arc surfacing welding austenitic matrix flux-cored wire with defects

Method used

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  • A self-shielded open arc surfacing welding austenitic matrix flux-cored wire and its application method
  • A self-shielded open arc surfacing welding austenitic matrix flux-cored wire and its application method
  • A self-shielded open arc surfacing welding austenitic matrix flux-cored wire and its application method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] During production, weigh high-carbon ferrochromium, ferro-niobium, flake graphite, ferrosilicon, ultrafine graphite, ultrafine aluminum powder and other alloy powders according to the powder core composition ratio of the above-mentioned flux cored wire. Among them, ultrafine graphite is also It needs to pass through a 500-mesh sieve, and the superfine aluminum powder needs to pass through a 300-mesh sieve, and then all the powders are passed through a 60-mesh sieve, and all components are mixed evenly. 15mm, put it into a drying furnace and heat it up to 70-80°C and keep it warm for 2 hours, then cool it to 30°C with the furnace and leave the oven. Immediately, 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 wire is H08A cold-rolled steel strip (width 16mm×thickness 0.36mm, the same below), and the inner sheath is equipped with iron alloy, ultra-fine graphite a...

Embodiment 2

[0042] During production, weigh high-carbon ferrochrome, ferro-niobium, flake graphite, ferrosilicon, ultrafine graphite, ultrafine aluminum powder and other alloy powders according to the composition ratio requirements of the above-mentioned flux cored wire powder core, among which, ultrafine graphite is also It needs to pass through a 500-mesh sieve, and the superfine aluminum powder needs to pass through a 300-mesh sieve, and then all the powders are passed through a 60-mesh sieve, and all components are mixed evenly. 15mm, put it into the drying furnace and raise the temperature to 70-80°C and keep it warm for 2 hours, then cool it to 30°C with the furnace and take it out of the oven. Immediately, 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 wire is H08A cold-rolled steel strip, and the powder core is composed of ferroalloy, ultra-fine graphite and ultra-fine a...

Embodiment 3

[0045] During production, weigh high-carbon ferrochrome, ferro-niobium, flake graphite, ferrosilicon, ultrafine graphite, ultrafine aluminum powder and other alloy powders according to the composition ratio requirements of the above-mentioned flux cored wire powder core, among which, ultrafine graphite is also It needs to pass through a 500-mesh sieve, and the superfine aluminum powder needs to pass through a 300-mesh sieve, and then all the powders are passed through a 60-mesh sieve, and all components are mixed evenly. 15mm, put it into the drying furnace and raise the temperature to 70-80°C and keep it warm for 2 hours, then cool it to 30°C with the furnace and take it out of the oven. Immediately, 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 wire is H08A cold-rolled steel strip, and the powder core is composed of ferroalloy, ultra-fine graphite and ultra-fine a...

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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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Patent Type & Authority Patents(China)
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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