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Tube-like tungsten carbonate welding bar

A tubular electrode, tungsten carbide technology, applied in welding media, welding equipment, welding equipment, etc., can solve the problems of reducing the wear resistance of the welding layer, the hard particles in the welding layer falling off, and the adhesive phase being easily worn. , to achieve the effect of improving overall wear resistance, improving erosion and wear resistance, and not easy to fall off.

Inactive Publication Date: 2006-03-08
SINOPEC OILFIELD EQUIP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tubular tungsten carbide electrode in the prior art uses spherical sintered WC particles as the main filler, and its particle size range is mainly concentrated in 16-30 mesh, of which 16-20 mesh accounts for 45-50%, and 20-30 mesh accounts for 45-50%. Therefore, the distance between the hard particles in the surfacing layer is relatively large, and the bonding phase in the surfacing layer of the roller cone bit is relatively easy to be worn during downhole work, which causes the hard particles in the surfacing layer to fall off. Thereby reducing the wear resistance of the welding layer and reducing the service life of the roller cone bit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1: the filler of tubular welding rod has the following components by weight: sintered tungsten carbide particles 70-80%, particle size 20-30 mesh accounts for 40-45%, 30-40 mesh accounts for 55-60%, casting carbide Tungsten particles 12-23%, particle size 40-200 mesh, ferrosilicon powder, ferromanganese powder, manganese powder and niobium powder mixture 5-6%, organic resin 1-2%. The weight ratio of the filler to the tubular electrode is 65%; the sintered tungsten carbide particles are spherical or ellipsoidal, and the alloy binder in the sintered tungsten carbide particles is cobalt powder, nickel powder or iron powder, and cobalt powder is used as the binder and spherical Granules work best. The wet sand wear test results of this embodiment show that the wear resistance of the wear-resistant layer welded by the electrode has increased by 30-50% compared with the existing similar electrodes, and the on-site comparison experiment on the roller cone bit also s...

Embodiment 2

[0011] Embodiment 2: the filler of tubular electrode has the following components by weight: sintered tungsten carbide particles 80-90%, particle size 30-40 orders, cast tungsten carbide particles 4-14%, particle size 40-200 orders, silicon The mixture of iron powder, ferromanganese powder, manganese powder and niobium powder is 5-6%, and organic resin is 1-2%. The filler accounts for 67% by weight of the tubular electrode. Other conditions are the same as the previous embodiment. The wet sand wear test results of this embodiment show that the wear resistance of the wear-resistant layer welded by the electrode is 30-60% higher than that of the existing similar electrodes, and the field comparison experiment on the roller cone bit also shows that obvious advantage.

Embodiment 3

[0012] Embodiment 3: the filler of tubular electrode has the following components by weight: sintered tungsten carbide particles 70-90%, particle size 20-30 mesh accounts for 55-65%, 30-40 mesh accounts for 35-45%, cast carbonization Tungsten particles 5-23%, particle size 40-200 mesh, mixture of ferrosilicon powder, ferromanganese powder, manganese powder and niobium powder 4-5%, organic resin 1%. The filler accounts for 68% by weight of the tubular electrode. The wet sand wear test results of this embodiment show that the wear resistance of the wear-resistant layer welded by the electrode is 20-50% higher than that of the existing similar electrodes, and the field comparison experiment on the roller cone bit also shows better effect.

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Abstract

The present invention relates to a tungsten carbide electrode as wear-resisting surfacing material for strengthening tooth face and shirttail of steel tooth cone bit etc.. It includes electrode tube and filling material held in the electrode tube. The described filling material comprises sintered tungsten carbide granules in whnich its 20-30 mesh is 0-80% and 30-40 mesh is 20-100%, alloy powder and organic adhesive, and the cast tungsten carbide granules also can be added to the filling material, the filling material comprises 60-95% of sintered tungsten carbide granules, 0-35% of cast tungsten dcarbide granules, 2-6% of alloy powder and 0.5-2% of organic adhesive.

Description

technical field [0001] The invention relates to a tubular tungsten carbide welding rod, which is used as a wear-resistant surfacing material, which can be used for strengthening the tooth surface and the palm tip of the steel tooth cone bit, and the palm tip of the toothed cone bit, and can also be used for other steel parts Surface strengthening of materials. Background technique [0002] Improving the performance of the wear-resistant welding layer on the tooth surface and palm tip of the roller cone bit is one of the key issues to improve the service performance and life of the roller cone bit. Tubular WC electrodes with sintered tungsten carbide particles as the main filler are widely used on the wear-resistant welding layer of roller cone bits. Both theory and practice have shown that there are two forms of failure of the wear-resistant welding layer on the roller cone bit. One is that the hard wear-resistant particles in the wear-resistant welding layer are worn away,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/368B23K9/04B23K35/02B23K35/362
Inventor 张烈华吴建肖岸
Owner SINOPEC OILFIELD EQUIP CORP
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