The substrates of the components are made of high-quality carbon steel, alloy structural steel, stainless steel and other materials, and processed through a series of stringent procedures including forging, quenching and tempering, precision turning and ultrasonic flaw detection. This ensures the substrates possess excellent comprehensive mechanical properties, and the roughness of the coating bonding surface is strictly controlled within the range of Ra3.2~Ra6.3μm to provide a stable and reliable mechanical anchoring foundation for the coatings. The core coating systems can be tailored to meet diverse working condition requirements: **WC-Co and Cr₃C₂-NiCr cemented carbide coatings** feature a coating density of ≥ 99.7%, a microhardness of ≥ HV1250 and a bonding strength of ≥ 65MPa, suitable for severe wear and heavy load conditions such as metallurgical rolling mill transmission shafts and mining crusher main shafts, and can effectively resist abrasive wear, impact wear and oxide scale scouring; **Al₂O₃-TiO₂ and Cr₂O₃ ceramic coatings** boast outstanding high-temperature resistance, insulation and anti-adhesion performance, enabling long-term stable service in high-temperature environments above 850℃, ideal for high-temperature working conditions such as building materials kiln transmission roller shafts and steam turbine rotating shafts, and can eliminate material adhesion and high-temperature oxidation failure; **nickel-based alloy and fluoroplastic composite coatings** exhibit excellent resistance to acid, alkali and salt corrosion, applicable to corrosive working conditions such as petrochemical transfer pump shafts and electroplating production line transmission shafts, capable of withstanding sustained erosion from acid-alkali solutions, salt spray and chemical media, and preventing pitting corrosion, rusting and intergranular corrosion on the shaft surface; **Ni-Al cermet composite coatings** integrate high toughness and fatigue resistance, suitable for high-speed rotating working conditions such as wind turbine main shafts and machine tool main shafts, and can significantly improve the fatigue life of shaft components under alternating loads.

All coatings are precisely prepared with standardized process parameters, and the coating thickness is uniformly controllable within the range of 50μm~600μm. Moreover, differentiated coating design can be implemented according to the working condition differences of different parts of the shaft components. The coating surface undergoes precision post-treatment processes such as grinding and polishing, with the surface roughness controlled at ≤ Ra0.4μm, which ensures the compatibility of shaft components with bearings and seals, and reduces the wear loss of matching parts. The product features prominent core competitive advantages: compared with traditional uncoated shaft components, its wear-resistant service life is increased by 10–20 times, corrosion resistance is improved by 8–15 times, and fatigue strength is enhanced by more than 30%. There is no risk of coating peeling, cracking or blistering under the conditions of repeated thermal cycling, alternating loads and harsh media. Meanwhile, customized services are available. The diameter, length, coating material and thickness of shaft components can be customized according to customer requirements to adapt to different specifications of host equipment. In addition, the business of coating repair for used shaft components is also available. Through surface pretreatment and coating repair of worn and corrosion-failed shaft components, the performance of shaft components is restored to the new product standard, which greatly reduces the equipment procurement and operation costs of enterprises.

This product is widely used in numerous fields such as metallurgical rolling mill transmission shafts, mining crusher main shafts, wind turbine main shafts, engineering machinery hydraulic pump shafts, petrochemical transfer pump shafts and machine tool precision main shafts. It can effectively improve the operational stability of host equipment, reduce unplanned downtime caused by shaft component failure, lower comprehensive production costs, and create significant economic benefits for customers. Backed by a professional thermal spraying technical team and a comprehensive testing system, each coating-protected shaft component is subject to a series of rigorous inspections before delivery, including coating adhesion pull-off testing, microhardness testing, salt spray corrosion testing and dimensional accuracy testing, to ensure that product quality fully complies with industry standards such as GB/T 9793 and ASTM C633 as well as customer application requirements.

If you want to learn more product details, please contact Jiangxi Velavision.