The papermaking dryer is an important part of the papermaking machinery, which is mainly a machine that continuously dries the paper blank after the pulp is formed. There are dozens of dryer crossovers in a paper machine. The drying cylinder is a drum-type pressure vessel with rotatable shafts on both ends of the heads, and the steam for drying paper is passed through the inner hole of the hollow shaft at one end. The surface of the drying cylinder is in contact with these steams for a long time, coupled with the high temperature in the cylinder and the corrosive medium in the pulp, the surface of the drying cylinder will have serious corrosion problems. During the production process, it will contact the papermaking blade, and there will be wear problems. This type of The appearance of the problem will lead to a decline in the quality of paper production, affecting paper production, and the cost of replacing a new dryer is relatively high. Therefore, many manufacturers are currently looking for better repair methods to make up for this problem.
wococarbide.com uses thermal spraying technology to spray high chromium molybdenum alloy on the surface of the dryer to prepare a metal coating, thereby improving the strength of the dryer. High chromium molybdenum alloy has the advantages of high strength, high melting point, corrosion resistance, wear resistance, etc., using supersonic spraying technology, using a heat source to heat the spraying material to a molten or semi-melting state, and spray deposition at a certain speed to the pretreated material. The surface of the drying cylinder is formed with a high chromium molybdenum alloy coating. The metal coating formed by thermal spraying technology is not only resistant to corrosion and wear, but also has high compactness and high bonding strength with the substrate, which can effectively improve the service life of the workpiece and is a solution to corrosion and wear. effective method.
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