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Slag-free self-protection flux-cored wire for niobium-titanium compound reinforcement hardfacing

A technology of flux-cored welding wire and self-protection, applied in the direction of welding medium, welding equipment, welding equipment, etc., to achieve the effects of small porosity sensitivity, uniform surface hardness, high hardness and thermal stability

Inactive Publication Date: 2014-05-14
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current research, there is no report on adding a small amount of multi-component strong carbide-forming elements to form a composite carbide hard phase to strengthen the surfacing flux-cored wire

Method used

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  • Slag-free self-protection flux-cored wire for niobium-titanium compound reinforcement hardfacing
  • Slag-free self-protection flux-cored wire for niobium-titanium compound reinforcement hardfacing
  • Slag-free self-protection flux-cored wire for niobium-titanium compound reinforcement hardfacing

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A kind of slag-free self-shielding flux-cored welding wire for niobium-titanium composite strengthened wear-resistant surfacing welding, the flux core components are prepared according to the following quality: 55g of high-carbon ferrochrome, 8g of ferro-niobium, 4g of ferro-titanium, 3g of graphite, 2g of ferroboron, 8g of deoxidizer, 20g of iron powder, a total of 100g of powder, wherein the deoxidizer includes 2g of aluminum-magnesium alloy, 5g of manganese powder, and 1g of ferrosilicon. 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 49%. 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 b...

Embodiment 2

[0029] A kind of slag-free self-shielding flux-cored welding wire for niobium-titanium composite strengthened wear-resistant surfacing welding, the flux core components are prepared according to the following quality: 58g of high-carbon ferrochrome, 6g of ferro-niobium, 6g of ferro-titanium, 4g of graphite, 2.5g of ferroboron, 12g of deoxidizer, 11.5g of iron powder, a total of 100g of powder, wherein the deoxidizer contains 3g of aluminum-magnesium alloy, 6g of manganese powder and 3g of ferrosilicon. All the powders taken passed through an 80-mesh sieve. The various powders taken are put into the powder mixer, mixed for 40 minutes, and then the mixed powder is added into the U-shaped 16×0.3mm H08A carbon steel belt groove, and the filling rate is 53%. 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...

Embodiment 3

[0031] A kind of slag-free self-shielding flux-cored welding wire for niobium-titanium composite strengthened wear-resistant surfacing welding, its flux core composition is prepared according to the following quality: 60g of high-carbon ferrochrome, 5g of ferro-niobium, 7g of ferro-titanium, 4g of graphite, 2.5g of ferroboron, 10g of deoxidizer, 11.5g of iron powder, a total of 100g of powder, wherein the deoxidizer contains 2g of aluminum-magnesium alloy, 6g of manganese powder and 2g of ferrosilicon. 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 52%. 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 o...

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Abstract

The invention discloses a slag-free self-protection flux-cored wire for niobium-titanium compound reinforcement hardfacing. The slag-free self-protection flux-cored wire for niobium-titanium compound reinforcement hardfacing comprises a mild-carbon steel strip and a flux core, and the steel strip is filled with the flux core. The flux core contains, by mass, 55-65 percent of high carbon ferro-chrome, four to eight percent of ferroniobium, four to eight percent of ferrotitanium, three to five percent of graphite, two to three percent of ferroboron, eight to fourteen percent of deoxidizing agent and the balance of iron powder, wherein the deoxidizing agent is a mixture of aluminum-magnesium alloy, manganese powder and silicon iron, the mass ratio of the aluminum-magnesium alloy, the manganese powder and the silicon iron is (2-3):(5-8):(1-4), the weight percent of the manganese powder is larger than or equal to the sum of the weight percent of the silicon iron and the weight percent of the aluminum-magnesium alloy, and the ratio of the weight of the flux core to the total weight of the flux-cored wire is between 49 percent and 56 percent. The flux-cored wire is low in cost; (Nb,Ti)C double carbide is dispersed and separated out in the welding process, and the flux-cored wire is low in cost, high and uniform in rigidity, good in abrasion resistance, free of slag clearing in multi-layer welding, low in pore sensitivity and good in welding processing property.

Description

technical field [0001] The invention belongs to the field of welding in material processing engineering, and in particular relates to a slag-free self-shielding flux-cored welding wire for niobium-titanium composite enhanced wear-resistant surfacing welding. Background technique [0002] Self-shielding flux-cored wire has the advantages of fast deposition efficiency, convenient component adjustment, no need for additional auxiliary gas or flux, and high degree of automation. It is one of the most promising wear-resistant surfacing materials in the 21st century. Self-shielding flux-cored wires for surfacing generally rely on the core components to generate carbide anti-wear particles during the welding metallurgical process. These anti-wear particles are distributed in the tough matrix structure, making the surfacing metal have excellent wear resistance. Therefore, the amount of transition alloy in the surfacing metal fundamentally determines its wear resistance. In order to...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/368B23K35/40
CPCB23K9/04B23K35/0266B23K35/3086B23K35/406
Inventor 刘大双魏萍张冬冬
Owner JIANGSU UNIV OF SCI & TECH
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