Boiler Tube

Supersonic spraying is an advanced thermal spraying technology, which uses a special gun structure and high temperature and high speed air generated by gas combustion to heat tungsten carbide powder to a molten or semi-molten state, and jets at supersonic speed to the surface of the bottom roll of the pretreated winder. Under high-speed impact, tungsten carbide particles are rapidly flattened and tightly packed, forming a uniform, dense coating that binds firmly to the base roller. Compared with the traditional spraying technology, the supersonic spraying particles fly faster, the coating density is higher, the binding strength is better, the supersonic spraying tungsten carbide coating technology is applied on the bottom roller of the winder. After a period of use, remarkable results have been obtained. The wear rate of the bottom roller of the winder is significantly reduced, the situation that the bottom roller needs to be replaced frequently is improved, and the service life of the bottom roller is extended several times. At the same time, due to the good corrosion resistance of the coating, the bottom roll does not appear obvious corrosion phenomenon in the humid environment of the paper workshop. The rewinding quality of the paper has also been greatly improved, and the flatness and tightness of the paper after rewinding are better, reducing the defective rate, and improving the production efficiency and economic benefits of the enterprise.

The technology of supersonic tungsten carbide coating on the bottom roll of the winder in paper industry provides an effective way to solve the problems of wear and corrosion of the bottom roll, and can significantly improve the performance of the winder and the quality of the paper, and has broad application prospects and popularization value.