To judge the quality of NM450 abrasion resistant steel plate, the main chemical components such as chromium and carbon must be checked first. Second, we should test the hardness distribution of the hard surface layer. When the composition of the high chromium wear plate is similar, the hardness value can be used to judge the wear resistance. In addition, when testing the hardness of the hard surface layer, the hardness distribution of the hard surface layer should be considered to ensure that the wear resistance of the hard surface layer is uniform. Therefore, when testing the hardness, it is not only necessary to test the surface of the hard surface layer, but also observe the surface flatness and the bonding strength of NM450 abrasion resistant steel plate.
Attention should also be paid to the flatness of the product surface and the uniformity of the welding seam to avoid reducing the service life due to the wear of thinner parts.
When cutting, the hard surface layer cannot be cut with oxyacetylene, but can be easily cut with a plasma cutting machine and laser. Because the high-chromium abrasion resistant steel plate has an extremely long wear-resistant life, it can be directly welded and installed on the back plate in an environment without extremely severe wear. However, if there is abrasion at the weld, it is necessary to use a hard-faced electrode to protect the weld to prevent the high chromium wear-resistant composite board from falling off or the back plate from wearing off, and to prevent the hard surface from peeling off.
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