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In-situ synthesis WC and W6C type carbide self-protection strengthening build-up welding flux-cored wire and preparation method thereof

An in-situ synthesis and carbide technology, applied in welding equipment, welding media, manufacturing tools, etc., can solve problems such as adverse effects of wear resistance, burning of tungsten carbide particles, etc., and achieve high degree of alloy homogeneity and good weld bead Good effect of surface forming and welding process performance

Active Publication Date: 2016-10-26
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The manufacture of traditional tungsten carbide surfacing alloys generally relies on high-frequency heating and gas welding of tubular welding wires, while arc surfacing welding will cause severe burnout of tungsten carbide particles added in the flux core, which will have a negative impact on wear resistance

Method used

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  • In-situ synthesis WC and W6C type carbide self-protection strengthening build-up welding flux-cored wire and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] An in-situ synthesized WC and W6C type carbide reinforced self-shielding surfacing flux-cored wire, including a low-carbon steel strip and a flux core, the flux core is filled in the steel strip, and the flux core components are prepared according to the following quality: including low-carbon steel Belt and drug core, the drug core is filled in the steel belt, the drug core composition is prepared according to the following quality: including low carbon steel belt and drug core, the drug core is filled in the steel belt, the drug core composition is prepared according to the following quality: 12g 80 mesh high carbon ferromanganese, 52g 80 mesh tungsten powder, 6g 80 mesh electrolytic manganese powder, 8g 60 mesh graphite, 2g ferroboron, 3g aluminum magnesium alloy, 2g silicon manganese alloy, 15g 80 mesh iron Among them, ferroboron, aluminum-magnesium alloy and silicon-manganese alloy are added in two particle sizes of 60 mesh and 200 mesh, and the mass fractions of 60...

Embodiment 2

[0031]An in-situ synthesized WC and W6C type carbide reinforced self-shielding surfacing flux-cored wire, including a low-carbon steel strip and a flux core, the flux core is filled in the steel strip, and the flux core components are prepared according to the following quality: including low-carbon steel Belt and drug core, the drug core is filled in the steel belt, the drug core composition is prepared according to the following quality: including low carbon steel belt and drug core, the drug core is filled in the steel belt, the drug core composition is prepared according to the following quality: 6g 80 mesh high carbon ferromanganese, 60g 80 mesh tungsten powder, 10g 80 mesh electrolytic manganese powder, 12g 60 mesh graphite, 1g ferroboron, 1g aluminum magnesium alloy, 3g silicon manganese alloy, 7g 80 mesh iron Among them, ferroboron, aluminum-magnesium alloy and silicon-manganese alloy are added in two particle sizes of 60 mesh and 200 mesh, and the mass fractions of 60 ...

Embodiment 3

[0033] An in-situ synthesized WC and W6C type carbide reinforced self-shielding surfacing flux-cored wire, including a low-carbon steel strip and a flux core, the flux core is filled in the steel strip, and the flux core components are prepared according to the following quality: including low-carbon steel Belt and drug core, the drug core is filled in the steel belt, the drug core composition is prepared according to the following quality: including low carbon steel belt and drug core, the drug core is filled in the steel belt, the drug core composition is prepared according to the following quality: 8g 80 mesh high carbon ferromanganese, 56g 80 mesh tungsten powder, 8g 80 mesh electrolytic manganese powder, 10g 60 mesh graphite, 2g ferroboron, 2g aluminum magnesium alloy, 1g silicon manganese alloy, 13g 80 mesh iron Among them, ferroboron, aluminum-magnesium alloy and silicon-manganese alloy are added in two particle sizes of 60 mesh and 200 mesh, and the mass fractions of 60...

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Abstract

The invention discloses an in-situ synthesis WC and W6C type carbide self-protection strengthening build-up welding flux-cored wire. A low carbon steel strip is used as an outer cover; a flux core comprises the following components in percentage by weight: 6-12% of high-carbon ferromanganese, 50-60% of tungsten powder, 6-12% of electrolytic manganese powder, 8-12% of graphite, 1-3% of ferroboron, 1-3% of an aluminum magnesium alloy, 1-3% of silicomangan and the balance iron powder, wherein the ferroboron, the aluminum magnesium alloy and the silicomangan are added in two particle sizes including 60 meshes and 200 meshes; and the weight of the flux core accounts for 50-55% of the total weight of the flux-core wire. According to the welding flux-cored wire provided by the invention, components of the flux core in different particle sizes are added, so that favorable welding process performance is guaranteed; through an appropriate compounding ratio with other alloy powder, an eutectic crystal consisting of first-separated WC carbide, W6C and part of martensite is formed in the build-up welding alloy structure; the hardness of a build-up welding layer is as high as 62-66HRC, so that the in-situ synthesis WC and W6C type carbide self-protection strengthening build-up welding flux-cored wire disclosed by the invention is good in abrasion resistance, favorable in welding process performance, and high in depositing efficiency, and multilayer welding is free from removing slags.

Description

technical field [0001] The invention belongs to the field of welding in material processing engineering, in particular to an in-situ synthesis of WC and W 6 C-type carbide reinforced self-shielded surfacing flux-cored wire and a preparation method thereof. Background technique [0002] As a green manufacturing process, surfacing welding is widely used in the repair or remanufacture of various wear-resistant parts. Among them, the tungsten carbide surfacing alloy with tungsten carbide as the main hard phase has excellent abrasive wear resistance, and is widely used in the repair or remanufacturing of wear-resistant parts under severe abrasive wear conditions. The manufacture of traditional tungsten carbide surfacing alloys generally relies on high-frequency heating and gas welding of tubular welding wires, while arc surfacing welding will cause severe burnout of tungsten carbide particles added in the flux core, which will have a negative impact on wear resistance . Theref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/368B23K35/40
CPCB23K35/0266B23K35/3053B23K35/3601B23K35/368B23K35/406
Inventor 刘大双吴铭方祁凯
Owner JIANGSU UNIV OF SCI & TECH
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