Development and application of supersonic flame spraying technology(7)

       

2.2　 chromium carbide materials

2.2　 chromium carbide materials

2.2　 chromium carbide materials

2.2 chromium carbide-based material

2.2 chromium carbide-based material

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Because tungsten carbide coating has a certain temperature limit in use, other heat-resistant coating materials such as chromium carbide materials have been developed, such as Cr3C2-25NiCr materials.

Because tungsten carbide coating has a certain temperature limit in use, other heat-resistant coating materials such as chromium carbide materials have been developed, such as Cr3C2-25NiCr materials.

Because tungsten carbide coating has a certain temperature limit in use, other heat-resistant coating materials such as chromium carbide materials have been developed, such as Cr3C2-25NiCr materials.

Since tungsten carbide coating with a certain temperature limit, in use, so other heat resistant material, such as chromium carbide-based coating materials have been developed, e.g. Cr3C2-25NiCr material.

Since tungsten carbide coating with a certain temperature limit, in use, so other heat resistant material, such as chromium carbide-based coating materials have been developed, e.g. Cr3C2-25NiCr material.

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HVOF spraying Cr3C2-25NiCr can obtain a coating with a compressive residual stress. The coating structure is denser and the cohesive force is extremely high. The coating has a higher bonding force with the substrate. During the spraying process, the powder decarburizes very little, so the coating

HVOF spraying Cr3C2-25NiCr can obtain a coating with a compressive residual stress. The coating structure is denser and the cohesive force is extremely high. The coating has a higher bonding force with the substrate. During the spraying process, the powder decarburizes very little, so the coating

HVOF spraying Cr3C2-25NiCr can obtain a coating with a compressive residual stress. The coating structure is denser and the cohesive force is extremely high. The coating has a higher bonding force with the substrate. During the spraying process, the powder decarburizes very little, so the coating

HVOF spray Cr3C2-25NiCr get the residual stress is a compressive stress, with a coating more dense and organized high cohesion, coating and the substrate has a higher binding force, decarburization little powder spraying process, and thus the coating

HVOF spray Cr3C2-25NiCr get the residual stress is a compressive stress, with a coating more dense and organized high cohesion, coating and the substrate has a higher binding force, decarburization little powder spraying process, and thus the coating

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The hardness is higher and the reliability is better.

The hardness is higher and the reliability is better.

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higher hardness, better reliability.

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Cr3C2-NiCr material has been widely used in the wear-resistant coating of key parts, and has a wide range of application prospects in machinery, metallurgy and other industries, such as pump seals, piston parts, rolls and other working surfaces.

Cr3C2-NiCr material has been widely used in the wear-resistant coating of key parts, and has a wide range of application prospects in machinery, metallurgy and other industries, such as pump seals, piston parts, rolls and other working surfaces.

Cr3C2-NiCr material has been widely used in the wear-resistant coating of key parts, and has a wide range of application prospects in machinery, metallurgy and other industries, such as pump seals, piston parts, rolls and other working surfaces.

Cr3C2-NiCr wear resistant coating material has been widely used in critical parts, has wide application prospect in the mechanical, metallurgical industries, such as the pump seal the working surface of the piston member, rollers and the like.

Cr3C2-NiCr wear resistant coating material has been widely used in critical parts, has wide application prospect in the mechanical, metallurgical industries, such as the pump seal the working surface of the piston member, rollers and the like.

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The Cr3C2-NiCr coating prepared by the HVOF process has the characteristics of high hardness, low porosity (<0.9%), and high bonding strength with the substrate (>70MPa).

The Cr3C2-NiCr coating prepared by the HVOF process has the characteristics of high hardness, low porosity (<0.9%), and high bonding strength with the substrate (>70MPa).

The Cr3C2-NiCr coating prepared by the HVOF process has the characteristics of high hardness, low porosity (<0.9%), and high bonding strength with the substrate (>70MPa).

Cr3C2-NiCr coating prepared HVOF process have a high hardness, a low porosity (<0.9%), with high bonding strength (> 70MPa) and so on.

Cr3C2-NiCr coating prepared HVOF process have a high hardness, a low porosity (<0.9%), with high bonding strength (> 70MPa) and so on.

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The prepared coating can meet the requirements of high wear-resistant parts [2].

The prepared coating can meet the requirements of high wear-resistant parts [2].

The prepared coating can meet the requirements of high wear-resistant parts [2].

Coating prepared to meet the requirements of high wear-resistant parts [2].

Coating prepared to meet the requirements of high wear-resistant parts [2].

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2.3　Metal materials 　　 Metal materials used as thermal spraying materials are generally required to have good wear resistance or corrosion resistance. NiCr alloys or other high-alloy/superalloy composite metal materials are generally used for large-volume parts such as boiler pipes and chemical bath linings, such as various types of MCrAlY coating materials, including CoNiCrAlY, NiCoCrAlY, NiCrAlY and Fe-CrA1Y. These materials can provide a stable coating for thermal isolation, and can also be used as an independent high-wear and corrosion-resistant coating in high-temperature environments. 　　The hydraulic turbines of large and medium-sized hydropower stations use supersonic flame sprayed MCrAlY, the coating is dense and the bonding strength is high, which can effectively resist the strong erosion and wear of mud and sand, and improve the service life of the flow parts of the turbine [3]. The blades of stationary gas engines not only suffer from high temperature, which reduces their hardness, but also suffer from air and fuel pollution. In order to avoid this phenomenon and improve its corrosion resistance, most blades are sprayed with MCrA1Y coating. 　　2.4　Ceramic materials 　　Ceramic powder can be sprayed using HVOF technology. The Al2O3-based coating prepared by HVOF technology has a higher density than plasma sprayed coatings and can form a smoother sprayed surface. Certain ceramic coatings using HVOF technology are essentially void-free and exhibit excellent performance.