How to remove fatigue layer or defects on the surface of roll surfacing

Roll surfacing refers to coating the surface of the roll with a layer of high hardness, high wear-resistant alloy material to increase the hardness and wear resistance of the product surface, thereby extending the service life of the product. Surfacing layer generally consists of a variety of metal materials, commonly used steel, chromium, molybdenum, cobalt, nickel and other elements of the alloy.

The process includes selecting suitable materials, preparing the surface, selecting suitable welding methods, and carrying out follow-up treatment. When working, attention needs to be paid to controlling the welding temperature and welding speed to ensure that the surfacing layer is firmly bonded to the roll surface. Subsequent surface treatment is required, including grinding, drilling, adjusting and other work, in order to protect the precision and quality of the product surface.
Roll surfacing usually uses shot blasting or grinding to remove fatigue layers or defects on the surface. Specific methods are as follows:
1, shot blasting: through the high-speed jet stream will be abrasive, cast steel bullet, steel shot, etc. to the product surface, to remove the surface oxide skin, rust, fatigue layer, etc., to achieve the purpose of cleaning and enhance the surface roughness.
2、Grinding: The grinding wheel is used to perform precision grinding on the product surface to remove surface defects, fatigue layer, etc., so as to achieve higher flatness and roughness.
It is important to note that, when performing shot blasting or grinding, the product should be properly protected so as not to cause secondary damage or affect the quality of roll surfacing.

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