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High-temperature-resistant high-wear-resistant nickel-based titanium carbide powder and preparation method thereof

A highly wear-resistant and high-temperature resistant technology, applied in coatings, metal material coating processes, melt spraying, etc., can solve the problem of decreased coating toughness, increased carbon content of the binder phase nickel-based alloys, and difficult coating performance. To meet the requirements of use and other issues, to achieve the effect of improving hardness and improving high temperature wear resistance

Active Publication Date: 2020-10-27
BEIJING MINING & METALLURGICAL TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After TiC dissolves in nickel, it will increase the carbon content in the nickel-based alloy in the binder phase, resulting in a decrease in the toughness of the coating, and the coating performance is difficult to meet the application requirements.

Method used

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  • High-temperature-resistant high-wear-resistant nickel-based titanium carbide powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Weigh 75kg of TiC powder and 25kg of NiCrAlSiX powder, wherein Cr accounts for 20% of NiCrAlSiX, Al accounts for 8% of NiCrAlSiX, Si accounts for 1% of NiCrAlSiX, W+V accounts for 5% in total, and the balance is Ni;

[0022] 2) Mix the above two powders evenly, add deionized water to make a wet grinding medium, add 2.5 kg of polyvinyl alcohol as a binder, a small amount of antioxidant and defoamer, and ball mill for 48 hours to prepare a mixed slurry;

[0023] 3) The agglomerated powder was prepared by centrifugal spray drying, wherein the inlet temperature was 210°C, the outlet temperature was 110°C, the rotation speed of the atomizing disc was 12000 / min, and the feeding volume was 300ml / min;

[0024] 4) Heat the powder in a vacuum degumming furnace, the sintering temperature is 1330°C, keep it warm for 3 hours, and then cool it to below 150°C with the furnace;

[0025] 5) After sieving and grading the above-mentioned powder after being released from the furnace, a ...

Embodiment 2

[0028] 1) Weigh 50kg of TiC powder and 50kg of NiCrAlSiX powder, wherein Cr accounts for 23% of NiCrAlSiX, Al accounts for 10% of NiCrAlSiX, Si accounts for 1.8% of NiCrAlSiX, W+V accounts for 5% in total, and the balance is Ni;

[0029] 2) Mix the above two powders evenly, add deionized water to make a wet grinding medium, add 2.8 kg of polyvinyl alcohol as a binder, a small amount of antioxidant and defoamer, and ball mill for 48 hours to obtain a mixed slurry;

[0030] 3) The agglomerated powder was prepared by centrifugal spray drying, wherein the inlet temperature was 210°C, the outlet temperature was 110°C, the rotation speed of the atomizing disc was 12000 / min, and the feeding volume was 300ml / min;

[0031] 4) Heat the powder in a vacuum degumming furnace, the sintering temperature is 1325°C, keep it warm for 3 hours, and then cool it to below 150°C with the furnace;

[0032] 5) After sieving and grading the above-mentioned discharged powder, a powder suitable for spray...

Embodiment 3

[0035] 1) Weigh 60kg of TiC powder and 40kg of NiCrAlSiX powder, wherein Cr accounts for 23% of NiCrAlSiX, Al accounts for 10% of NiCrAlSiX, Si accounts for 1.8% of NiCrAlSiX, W+V accounts for 5% in total, and the balance is Ni;

[0036] 2) Mix the above two powders evenly, add deionized water to make a wet grinding medium, add 2.8 kg of polyvinyl alcohol as a binder, a small amount of antioxidant and defoamer, and ball mill for 48 hours to obtain a mixed slurry;

[0037] 3) The agglomerated powder was prepared by centrifugal spray drying, wherein the inlet temperature was 210°C, the outlet temperature was 110°C, the rotation speed of the atomizing disc was 12000 / min, and the feeding volume was 300ml / min;

[0038] 4) Heat the powder in a vacuum degumming furnace, the sintering temperature is 1330°C, keep it warm for 3 hours, and then cool it to below 150°C with the furnace;

[0039]5) After sieving and grading the above-mentioned discharged powder, a powder suitable for sprayi...

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Abstract

The invention discloses high-temperature-resistant high-wear-resistant nickel-based titanium carbide powder and a preparation method thereof, and belongs to the technical field of surface engineering.The powder comprises 50-75% of TiC and 25-50% of NiCrAlSiX, wherein in NiCrAlSiX, Cr accounts for 20-23%, Al accounts for 7-10%, Si accounts for 1-2.5%, X is W+V, the total amount of X is greater than or equal to 3% and less than or equal to 8%, and the balance Ni. By adding Ni, the stability of Cr in an iron matrix is kept, the precipitation of Cr element in a spraying process is avoided, and the corrosion resistance of a material is improved; by adding a proper amount of Al, the dissolution of TiC can be inhibited, the hardness and toughness of a coating are kept, and meanwhile, the corrosion resistance of a composite material can be improved; by adding a small amount of boron, a spraying process window can be widened; and by adding 5-20% of Mo, the corrosion resistance and wear resistance of the coating are improved. According to the high-temperature-resistant high-wear-resistant nickel-based titanium carbide powder disclosed by the invention, a WC coating is replaced by a TiC coating, and the spraying cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, and relates to a high-temperature-resistant and high-wear-resistant nickel-based titanium carbide powder and a preparation method thereof, which can be used for surface wear-resistant protection in industries such as machinery, petroleum, chemical industry, shipbuilding, metallurgy, and electric power. Background technique [0002] Thermal spraying technology is widely used in aerospace, electric power, metallurgy, petrochemical, automobile and other industries. Commonly used carbide wear-resistant coating materials mainly include tungsten carbide and chromium carbide coating materials. Tungsten carbide coatings are mainly used in environments below 500 °C, and the hardness is generally at HV 0.3 More than 1100; chromium carbide coatings are often used in high-temperature wear-resistant environments at 500°C to 850°C. Chromium carbide has better oxidation resistance, but its hardness ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/10B22F9/04B22F9/02B22F3/10C23C4/129C23C4/06
CPCB22F3/1021B22F9/026B22F9/04C22C29/067C22C29/10C23C4/06C23C4/129
Inventor 高峰万伟伟李杰李正良李振铎张陆
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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