Tungsten Carbide Spraying on Conveying Screw Shafts, Wear Resistant Surface Coating Service

      In industrial scenarios such as powder conveying, mining, chemical material handling and building material processing, the screw conveyor shaft acts as the core rotating component of the material conveying system. When the equipment continuously transports granular, powdery and hard materials, the screw blades and shaft surface endure constant erosion, friction and impact from materials. Ordinary bare steel shafts are prone to surface wear, spalling and corrosion. Once the shaft is worn, the equipment fitting clearance will change, leading to poor material conveying, equipment vibration and abnormal noise. This increases the frequency of equipment disassembly, maintenance and part replacement, and disrupts continuous production line operation. To address the industry pain point of frequent wear on screw shafts, our factory specializes in surface hardening treatment and provides tungsten carbide spraying process for screw shafts. We offer professional coating protection services for various conveying screws to improve the component resistance under working conditions.

      Tungsten carbide spraying is a widely adopted metal surface hardening technology in the industry. Using professional thermal spraying equipment, tungsten carbide alloy powder is melted at high temperature and sprayed at high speed to form a uniform and dense protective coating on the surface of the screw shaft. Different from traditional electroplating, ordinary painting and surfacing welding, the coating boasts high bonding strength with the substrate and resists peeling, shedding and delamination. It can firmly attach to the surfaces of screw shafts and blades for long-term stable protection. The process will not cause high-temperature damage or deformation to the screw shaft substrate. The original structural dimensions and mechanical properties of the screw are fully retained, eliminating the need for subsequent secondary straightening.

      Screw shafts treated with tungsten carbide spraying feature greatly enhanced surface hardness, which effectively resists surface loss caused by erosion and continuous friction of hard materials, suitable for heavy-load and long-duration continuous operation. The coating is corrosion-resistant and oxidation-resistant. It can block moisture and corrosive chemical media to prevent rusting and oxidative aging of the screw shaft substrate. Adapted to harsh operating environments including chemical industries, wet building material processing and open-pit mining, it slows down component aging and extends the service life of screw shafts.

      This surface treatment process is compatible with screw conveying equipment of various specifications, including small powder conveying screws, medium chemical auger shafts and large mining material conveyor screw shafts. It can deliver pre-protection for brand-new screw shafts as well as repair and reinforcement for worn and rusted old screws. Coating thickness and powder formula can be adjusted according to material hardness and corrosion level under different working conditions to meet the protection requirements of diverse equipment and suit conveying equipment applications across multiple industries.

      Traditional protection processes for screw shafts produce thin coatings with poor wear and impact resistance. The coating tends to wear out in a short period, requiring repeated refurbishment and maintenance and raising equipment operation costs for enterprises. Our factory adopts an optimized thermal spraying workflow with uniform powder atomization, dense coating deposition and low porosity. The finished coating can withstand frequent material erosion. The smooth coating surface will not alter the conveying structure of the screw shaft. Material conveying resistance remains stable without affecting the original conveying efficiency of the equipment, ensuring steady production line operation.

      Our factory is equipped with complete professional thermal spraying equipment and an experienced technical team, capable of mass spraying processing for screw shafts of various sizes. All processing procedures comply with industrial surface treatment standards. Every step, from substrate pretreatment, grinding and rust removal, cleaning and impurity removal, to high-temperature spraying, coating curing and finishing, is under strict control. After processing, inspections on coating adhesion, surface thickness and surface condition are carried out to detect coating defects and poor adhesion, ensuring the sprayed components can operate stably in industrial production.

      Our factory undertakes tungsten carbide spraying and hardening services for a wide range of industrial parts. Apart from screw conveyor shafts, we can apply wear-resistant and anti-corrosion coatings on various mechanical transmission parts and conveying accessories subject to heavy wear. With mature spraying technology, we keep optimizing surface treatment solutions to meet the protection and hardening demands of different industrial equipment. We help industrial and mining enterprises cut expenditure on equipment replacement and maintenance and support long-term stable operation of industrial machinery.