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Hardfacing self-protection flux-cored wire

A flux-cored wire, self-protection technology, applied in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problems of low transition coefficient, waste of resources, expensive nitrogen-containing alloy powder, etc., and achieve enhanced wear resistance. performance, improve hardness and strength, good effect of welding process performance

Inactive Publication Date: 2017-05-31
HOHAI UNIV CHANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the method of adding nitrogen alloys to welding materials is mainly realized by adding nitrogen-containing alloy powders, such as adding nitrogen-containing chromium, manganese, vanadium and other ferroalloy powders. These added nitrogen-containing alloy powders are expensive and have low transition coefficients. , resulting in a huge waste of resources

Method used

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  • Hardfacing self-protection flux-cored wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A self-protecting flux-cored welding wire for wear-resistant surfacing welding, comprising a hollow welding wire of H08A low-carbon steel and a powder flux core arranged in the hollow welding wire, and the powder flux core is composed of the following raw materials in weight percentage: low-carbon chromium 50% iron, 12% rutile, 3% marble, 8% fluorite, 5% zircon, deoxidizer (mixture of aluminum powder, ferrosilicon and ferromanganese in a weight ratio of 1:1:1) 8%, ferrotitanium 6%, ferroniobium 4%, ferrovanadium 4%, filling rate 33wt%. As shown in Figure 1, it is made by the following steps: mix the raw materials of the powder core, stir evenly, then fill it in the hollow welding wire, and perform rolling and drawing in sequence to obtain the wear-resistant surfacing welding self-protection of the present invention. Flux cored wire.

[0023] The average hardness of the surfacing layer of flux-cored wire is HRC58.

Embodiment 2

[0025] A self-protecting flux-cored welding wire for wear-resistant surfacing welding, comprising a hollow welding wire of H08A low-carbon steel and a powder flux core arranged in the hollow welding wire, and the powder flux core is composed of the following raw materials in weight percentage: low-carbon chromium 55% iron, 7% rutile, 1% marble, 5% fluorite, 3% zircon, deoxidizer (a mixture of aluminum powder, ferrosilicon and ferromanganese in a weight ratio of 1:1:1) 12%, ferrotitanium 5%, ferroniobium 6%, ferrovanadium 6%, filling rate 35wt%. The preparation method is the same as in Example 1.

[0026] The average hardness of the surfacing layer of flux-cored wire is HRC55.

Embodiment 3

[0028] A self-protecting flux-cored welding wire for wear-resistant surfacing welding, comprising a hollow welding wire of H10 low-carbon steel and a powder flux core arranged in the hollow welding wire, and the powder flux core is composed of the following raw materials in weight percentage: low-carbon chromium 60% iron, 5% rutile, 5% marble, 2% fluorite, 2% zircon, deoxidizer (a mixture of aluminum powder, ferrosilicon and ferromanganese in a weight ratio of 1:1:1) 5%, ferrotitanium 10%, ferroniobium 3%, ferrovanadium 8%, filling rate 30wt%. The preparation method is the same as in Example 1. The average hardness of the surfacing layer of flux-cored wire is HRC45.

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Abstract

The invention discloses a hardfacing self-protection flux-cored wire, and belongs to the technical field of welding materials. The hardfacing self-protection flux-cored wire comprises a low-carbon hollow welding wire and a powder flux core arranged in the hollow welding wire. The hardfacing self-protection flux-cored wire is characterized in that the powder flux core comprises, by weight percent, 40%-60% of low-carbon ferrochromium, 5%-15% of rutile, 0-5% of marble, 2%-10% of fluorite, 2%-10% of zirconite, 5%-15% of a deoxidizing agent, 5%-10% of ferrotitanium, 3%-8% of ferrocolumbium and 3%-8% of ferrovanadium, and the filling rate ranges from 30 wt% to 40 wt%. According to the self-protection flux-cored wire, nitrogen in air can be utilized for alloying, and the content of nitrogen contained in hardfacing metal ranges from 0.6 wt% to 0.12 wt%; and the welding process performance of the hardfacing self-protection flux-cored wire is good, the average hardness of a surfacing layer ranges from 40 HRC to 58 HRC, and good use performance is achieved.

Description

technical field [0001] The invention belongs to the field of welding materials, and in particular relates to a wear-resistant surfacing welding self-protection flux-cored wire, which is suitable for surface modification, composite manufacturing and remanufacturing etc. Background technique [0002] Both nitrogen and carbon are interstitial solute atoms, which can form dispersed second phase particles, and nitrogen has little influence on welding performance, and no cracks will appear during welding. Making full use of the strengthening principle of nitrogen, introducing an appropriate amount of nitrogen into the wear-resistant surfacing material, through nitrogen alloying modification, using microalloying elements such as Ti, Nb and V to form favorable nitrides, can make up for the reduction in carbon content The hardness of the welding layer is reduced, and excellent surface properties such as high strength and wear resistance can be obtained in the wear-resistant surfacin...

Claims

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Application Information

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IPC IPC(8): B23K35/362B23K35/30
CPCB23K35/362B23K35/3053
Inventor 杨可包晔峰蒋永锋
Owner HOHAI UNIV CHANGZHOU
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