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A low-cost, high-hardness self-shielding surfacing flux-cored wire

A technology with high hardness and protection stack, applied in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problems of limited flux core space, difficult development of self-protected flux cored wire, etc., to avoid pores, etc. Defects, improve hardness, improve the effect of utilization

Active Publication Date: 2016-03-30
北京力佳利焊接材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason is that the development of self-shielding flux-cored welding wire is more difficult, and more slagging and gas-generating agents are often required to achieve self-shielding effect, which makes the flux core space limited

Method used

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  • A low-cost, high-hardness self-shielding surfacing flux-cored wire

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Experimental program
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Effect test

Embodiment 1

[0029] The drug core components are prepared according to the following quality: 85g of high-carbon ferrochromium, 5g of manganese powder, 2g of aluminum-magnesium alloy, 1.5g of ferrosilicon, 3g of graphite, 2g of ferroboron, and 1.5g of sodium fluorosilicate. A total of 100 g of powder. All the powders taken passed through an 80-mesh sieve. Put the various powders taken into the powder mixer, mix for 40 minutes, then add the mixed powder into the U-shaped 16×0.3mm H08A carbon steel belt groove, and the filling rate is 58%. Then close the U-shaped groove so that the powder is wrapped therein. Then make it pass through one or more of the wire drawing dies with diameters of 4.10mm, 3.80mm, 3.45mm, 3.15mm, 2.85mm, 2.60mm, and 2.40mm, draw and reduce the diameter one by one, and finally obtain a diameter of 2.40~4.10mm welding wire products. The welding current is 280-400A, the welding voltage is 28-36V, and the welding speed is 2.4m / min. The hardness and wear resistance of s...

Embodiment 2

[0031] The drug core components are prepared according to the following quality: 91g of high-carbon ferrochrome, 2g of manganese powder, 1.5g of aluminum-magnesium alloy, 0.5g of ferrosilicon, 2.5g of graphite, 1.5g of ferroboron, and 1g of sodium fluorosilicate . A total of 100 g of powder. All the powders taken passed through an 80-mesh sieve. Put the various powders taken into the powder mixer, mix for 40 minutes, then add the mixed powder into the U-shaped 16×0.3mm H08A carbon steel belt groove, and the filling rate is 62%. Then close the U-shaped groove so that the powder is wrapped therein. Then make it pass through one or more of the wire drawing dies with diameters of 4.10mm, 3.80mm, 3.45mm, 3.15mm, 2.85mm, 2.60mm, and 2.40mm, draw and reduce the diameter one by one, and finally obtain a diameter of 2.40~4.10mm welding wire products. The welding current is 280-400A, the welding voltage is 28-36V, and the welding speed is 2.4m / min. The hardness and wear resistance ...

Embodiment 3

[0033] The drug core components are prepared according to the following quality: 92g of high-carbon ferrochrome, 4g of manganese powder, 1g of aluminum-magnesium alloy, 1g of ferrosilicon, 1g of graphite, 0.5g of ferroboron, and 0.5g of sodium fluorosilicate. A total of 100 g of powder. All the powders taken passed through an 80-mesh sieve. Put the various powders into the powder mixer, mix for 40 minutes, then add the mixed powder into the U-shaped 16×0.3mm H08A carbon steel belt groove, and the filling rate is 65%. Then close the U-shaped groove so that the powder is wrapped therein. Then make it pass through one or more of the wire drawing dies with diameters of 4.10mm, 3.80mm, 3.45mm, 3.15mm, 2.85mm, 2.60mm, and 2.40mm, draw and reduce the diameter one by one, and finally obtain a diameter of 2.40~4.10mm welding wire products. The welding current is 280-400A, the welding voltage is 28-36V, and the welding speed is 2.4m / min. The hardness and wear resistance of surfacing...

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Abstract

The invention provides a low-cost high-hardness self-protection build up welding flux-cored wire which comprises a mild-carbon steel strip and a flux core. The flux core is filled into the steel strip. The flux core comprises, by weight, 85-92% of high carbon ferro-chrome, 2-5% of manganese powder, 1-2% of aluminum magnesium alloy, 0.5-1.5% of silicon iron, 1-3% of graphite, 0.5-2% of ferro-boron and 0.5-1.5% of sodium fluorosilicate. The filling rate of the flux core in a cored solder wire is 58-65%. The low-cost high-hardness self-protection build up welding flux-cored wire is low in cost, high in hardness, good in abrasion resistance, needless of slag removal in a multi-layer welding mode, and extremely small in air hole sensibility.

Description

technical field [0001] The invention belongs to the field of welding in material processing engineering, and in particular relates to a low-cost, high-hardness self-shielding surfacing flux-cored welding wire. Background technique [0002] There are high-hardness carbides inside the high-chromium cast iron structure, which provides excellent wear resistance and low cost, so it is widely used in mines and machinery. It is widely used in fields such as cement and metallurgy. Specifically, the structure of high chromium cast iron is divided into three types: hypoeutectic, eutectic and hypereutectic. Among them, the hypereutectic structure contains a large number of isolated primary carbides with high hardness, and the resistance to low stress wear is more prominent. Traditional high chromium cast iron is generally manufactured by casting method, but only hypoeutectic or eutectic structure with carbon content and relatively low chromium content can be obtained by using this me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/368B23K35/40
CPCB23K35/308B23K35/368B23K35/406B23K2103/06
Inventor 刘大双吴铭方魏萍
Owner 北京力佳利焊接材料有限公司
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