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

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 ...

Examples

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...

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 ...

Examples

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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