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blade
tianmeng
0014
Papermaking and pulping raw materials usually contain various impurities with high hardness, such as sand, gravel, metal particles, etc. Meanwhile, the fiber raw materials themselves also have certain wear resistance. When the cutter head rotates at high speed to cut and grind raw materials, its surface frequently comes into contact with these substances, generating intense friction and impact, which leads to rapid wear of the cutter head's surface. Wear and tear will blunt the cutting edge of the cutter head, reduce the cutting capacity, and thereby affect the efficiency and quality of pulping. As wear intensifies, the service life of the cutter head shortens, requiring frequent replacement, which increases production costs.
Supersonic spraying utilizes the supersonic gas flow generated by gas combustion or the expansion of high-pressure gas (with a speed reaching 2 to 3 times the speed of sound) to heat tungsten carbide ceramic powder and accelerate it to a very high speed (typically exceeding 500m/s). Tungsten carbide ceramic powder is heated to a partially melted state in a supersonic gas flow and strikes the pre-treated cutter head surface with high kinetic energy. The powder instantly forms a firm bond with the surface of the cutter head. Through layer-by-layer accumulation, a dense, uniform and highly hard tungsten carbide ceramic coating is formed on the surface of the cutter head.
Tungsten carbide ceramics possess outstanding properties such as high hardness (up to HV1500-2000), good wear resistance, high-temperature resistance, and strong chemical stability. During the supersonic spraying process, the metallurgical bonding and mechanical interlocking effect formed between the tungsten carbide ceramic powder and the surface of the cutter head ensures a good bonding strength between the coating and the cutter head substrate, effectively resisting the damage to the cutter head caused by various harsh working conditions.
Papermaking and pulping raw materials usually contain various impurities with high hardness, such as sand, gravel, metal particles, etc. Meanwhile, the fiber raw materials themselves also have certain wear resistance. When the cutter head rotates at high speed to cut and grind raw materials, its surface frequently comes into contact with these substances, generating intense friction and impact, which leads to rapid wear of the cutter head's surface. Wear and tear will blunt the cutting edge of the cutter head, reduce the cutting capacity, and thereby affect the efficiency and quality of pulping. As wear intensifies, the service life of the cutter head shortens, requiring frequent replacement, which increases production costs.
Supersonic spraying utilizes the supersonic gas flow generated by gas combustion or the expansion of high-pressure gas (with a speed reaching 2 to 3 times the speed of sound) to heat tungsten carbide ceramic powder and accelerate it to a very high speed (typically exceeding 500m/s). Tungsten carbide ceramic powder is heated to a partially melted state in a supersonic gas flow and strikes the pre-treated cutter head surface with high kinetic energy. The powder instantly forms a firm bond with the surface of the cutter head. Through layer-by-layer accumulation, a dense, uniform and highly hard tungsten carbide ceramic coating is formed on the surface of the cutter head.
Tungsten carbide ceramics possess outstanding properties such as high hardness (up to HV1500-2000), good wear resistance, high-temperature resistance, and strong chemical stability. During the supersonic spraying process, the metallurgical bonding and mechanical interlocking effect formed between the tungsten carbide ceramic powder and the surface of the cutter head ensures a good bonding strength between the coating and the cutter head substrate, effectively resisting the damage to the cutter head caused by various harsh working conditions.
