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Abrasion-resisting surfacing flux-cored wire for coal milling roller

A technology of flux-cored welding wire and welding wire, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., which can solve the problems of larger size of spatter particles, deterioration of welding process, and reduction of welding efficiency, and achieve welding spatter and smoke Small size, stable arc, and beautiful weld bead formation

Inactive Publication Date: 2012-07-11
LUOYANG SHUANGRUI SPECIAL ALLOY MATERIALS
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Problems solved by technology

Domestic flux-cored wires used for surfacing welding of coal grinding rollers mainly rely on a large amount of C and Cr elements to achieve Cr 7 C 3 Type carbide wear-resistant particles, but excessive carbon content (C ≥ 5%) will easily cause deterioration of the welding process, the size and number of spatter particles will increase, the weld shape will deteriorate, and the welding efficiency will be reduced

Method used

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  • Abrasion-resisting surfacing flux-cored wire for coal milling roller

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with Table 1 for the specific implementation of the drug core components.

[0032] In the embodiment of this patent, the carbon content of high-carbon ferrochrome is 6-10%, and the chromium content is 60-65%; The carbon content of chromium carbide is 10-12%; The carbon content of high-carbon ferromanganese is 7-8% %, the manganese content is 65-72%; the boron content of ferroboron is 19-25%; the magnesium content of aluminum-magnesium alloy is 47-53%. The K of the potassium titanate 2 O content is 28-35%, TiO 2 The content is 65-72%. The above contents are all percentages by mass.

[0033] Table 1. The specific implementation ratio of drug core components (%)

[0034]

[0035] According to the above-mentioned embodiment, the alloy powder and mineral powder are sieved and weighed, then fully mixed and uniform, and the particle size is controlled to 80-160 mesh, and then the ordinary low-carbon st...

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Abstract

The invention relates to an abrasion-resisting surfacing flux-cored wire for a coal milling roller, which is composed of high carbon ferro chrome 45-65%, chromium carbide 8-20%, chromium metal 5-15%, flake graphite 3-8%, high carbon ferromanganese 3-6%, 75# ferrosilicon 5-7%, ferroboron 5-15%, aluminum magnesium alloy 2-5% and an agglutinant 2-8%. The diameter of a welding wire is phi 3.2-phi 4.0mm, welding wire metal is a low carbon steel strip, and 49%-53% of cored powder by mass is filled in the formed low carbon steel strip. No protective gas is additionally arranged outside the flux-cored wire, and the manufacturability is good in the self protection open arc welding. During the welding, the arc is stable, the spatter lose rate is low, molten slag is little, the welding can be continuously performed, the welding joint is attractive in forming, the self-protection effect is good, and no air holes is on the surface of the flux-cored wire. The hardness of the abrasion-resisting surfacing flux-cored wire for the coal milling roller reaches above 62 HRC after multilayer surfacing by metal piling, the evenness of the whole hardness is + / -2HRC, and the performance resistant to abrasion of low-stress grinding materials is good.

Description

technical field [0001] The invention relates to a welding material technology, in particular to a wear-resistant surfacing flux-cored welding wire for coal grinding rollers. Background technique [0002] In the mining, machinery, electric power and metallurgy industries, there are a large number of large special wear-resistant workpieces, such as crusher drums, lining plates, coal mill roller sleeves, grinding balls, hoppers, vertical mill rollers and grinding discs, etc. These large wear-resistant parts are generally used under the conditions of low-stress abrasive wear and collision wear where the impact is not too strong. After a certain working time, they will fail and be scrapped due to excessive surface wear. The general solution to this situation is to use high hardness (requires HRC ≥ 60) and high wear-resistant surface surfacing materials to repair the surface of the component, which can not only restore the size, shape and performance of the component at a lower co...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/368B23K35/40
Inventor 刘瞿王效莲马明亮
Owner LUOYANG SHUANGRUI SPECIAL ALLOY MATERIALS
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