Tianmeng thermal spraying was applied to the roller body of the first TAD paper machine, opening a new chapter in wear resistance and anti-corrosion in the papermaking industry

Jinan Tianmeng New Materials Technology Co., Ltd. has recently achieved a major technological breakthrough. Its independently developed thermal spray tungsten carbide coating technology has been successfully applied to the first TAD (hot air Penetration Drying) paper machine roller of a large domestic paper industry group and has achieved stable operation. This landmark application marks that Tianmeng Company's technical strength in the field of surface strengthening of papermaking machinery has reached the forefront of the industry, providing reliable equipment support for the production of high-end specialty paper. The toilet paper machine can save 25% of fibers. At the same time, compared with the structural TAD paper machine, it can save 50% of energy consumption, greatly reducing production costs, and is also in line with the current market requirements for environmental protection and sustainable development.

As a core equipment for producing high-grade household paper, the TAD paper machine operates in an extremely harsh environment - the combined effect of high-temperature steam, high humidity, and chemical additives in the pulp places dual demands on the surface of the roller body for both super wear resistance and corrosion resistance. Traditional roller surface treatment technologies often perform poorly under such extreme conditions, resulting in frequent equipment shutdowns for maintenance and seriously affecting production efficiency.

In response to this industry pain point, the technical team of Tianmeng Company innovatively adopted the supersonic Flame spraying (HVOF) process to prepare a tungsten carbide metal-ceramic composite coating on the surface of the roller. This technology, through optimizing the spraying parameters and special post-treatment processes, enables the coating to possess the following outstanding characteristics:

The microhardness reaches over 1200HV, and the wear resistance is 3 to 5 times higher than that of traditional chrome-plated rollers

2. The porosity is less than 1%, effectively blocking the penetration of water vapor and chemical media

3. The bonding strength exceeds 70MPa, ensuring that the coating does not peel off during high-speed operation

4. The surface roughness Ra is ≤0.2μm, meeting the surface finish requirements for the production of specialty paper

We solved the problem of microcracks in tungsten carbide coatings under high temperature and high humidity conditions by adjusting the size distribution of WC particles and the proportion of the metal binder phase. And it has been verified in many papermaking enterprises. The production director of a certain paper industry group in Shandong commented: "Tianmeng's coating technology not only solves the problem of rapid wear of the roller body of our TAD paper machine, but also improves product quality through precise control of surface characteristics. This technological value-added effect far exceeds expectations."

The papermaking industry is developing towards high speed and specialization, which puts forward higher requirements for the surface performance of equipment. We will continue to deepen scenario-based innovation and provide more advanced surface solutions for the industry. The general manager of Tianmeng Company said. With the tightening of national environmental protection policies and the upgrading of the papermaking industry, high-performance thermal spraying technology is expected to become a standard process for papermaking equipment, and the market prospects are broad.