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Low-cost high-hardness self-protection build up welding flux-cored wire

A high-hardness, protective stack technology, applied in welding/welding/cutting items, welding media, welding equipment, etc., can solve the problems of limited flux core space and difficulty in developing self-shielded flux-cored wires, so as to avoid porosity, etc. Effects of defects, increased hardness, and improved filling rate

Active Publication Date: 2014-04-30
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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  • Low-cost high-hardness self-protection build up welding flux-cored wire

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Effect test

Embodiment 1

[0029] The composition of the drug core is prepared according to the following qualities: 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 100g of powder. All the powders taken were passed through an 80-mesh sieve. Put all kinds of powders into a mixer, mix for 40 minutes, and then add the mixed powders into a U-shaped 16×0.3mm H08A carbon steel strip groove with a filling rate of 58%. Then close the U-shaped groove to wrap the powder in it. 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, and 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 surfacin...

Embodiment 2

[0031] The composition of the drug core is prepared according to the following qualities: 91g of high carbon ferrochromium, 2g of manganese powder, 1.5g of aluminum-magnesium alloy, 0.5g of ferrosilicon, 2.5g of graphite, 1.5g of ferroboron, 1g of sodium fluorosilicate . A total of 100g of powder. All the powders taken were passed through an 80-mesh sieve. Put all kinds of powders in a mixer, mix for 40 minutes, and then add the mixed powders into a U-shaped 16×0.3mm H08A carbon steel strip groove with a filling rate of 62%. Then close the U-shaped groove to wrap the powder in it. 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, and 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 surfacin...

Embodiment 3

[0033] The core components are prepared according to the following quality: 92g of high carbon ferrochromium, 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 100g of powder. All the powders taken were passed through an 80-mesh sieve. Put all kinds of powders into a mixer, mix for 40 minutes, and then add the mixed powders into a U-shaped 16×0.3mm H08A carbon steel strip groove with a filling rate of 65%. Then close the U-shaped groove to wrap the powder in it. 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, and 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 metal are sh...

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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 welding field in material processing engineering, and particularly relates to a low-cost and high-hardness self-shielded surfacing flux-cored welding wire. Background technique [0002] There are high-hardness carbides in the high-chromium cast iron structure, which provides excellent wear resistance and low cost, so it is used in mining and machinery. It has been widely used in the fields of 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 and high hardness primary carbides, and the low stress wear resistance is more prominent. Traditional high-chromium cast iron is generally manufactured by casting method, but only hypoeutectic or eutectic structure with relatively low carbon content and chromium content can be obtained by this method. If you con...

Claims

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Application Information

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Patent Type & Authority Applications(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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