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About the hardness of NM400 wear-resistant steel plate

2019-10-23 17:16:39
Theoretically, the value behind the wear-resistant steel plate is the surface Brinell hardness, and has a certain floating value, generally around 30. Like the JFE series of EVERHARDC400, the surface Brinell hardness is 400±30. NM400 wear-resistant plate is a wear-resistant steel plate with high hardness HB≥450 weldable high-strength structure. The equipment is suitable for high-wear and high-impact applications, and can also be used as high-strength structural steel with yield strength ≥700MPa. Its hardness can reach about HV1300.
The wear resistance of the wear-resistant layer of the wear-resistant layer can reach HV1700-2000 or above and the surface hardness can reach HRc58-62. The wear-resistant layer of the wear-resistant steel plate is mainly composed of chromium alloy, and other alloy components such as manganese, molybdenum, niobium and nickel are added. The carbide in the gold structure is fibrously distributed, and the fiber direction is perpendicular to the surface.
But not the higher the hardness, the wear resistance is about. Hardness is the basis for the excellent wear resistance of wear-resistant steel plates, but there is no proportional relationship between hardness and wear resistance. Wear-resistant steel plates are wear-resistant because they have hard particles and a soft matrix. Generally, there are some falling off materials during the wear process. These substances will blend into the soft matrix without causing much damage to the surface. If the hardness of the matrix is ​​also relatively high, the abrasive that is shed or other substances. In mutual movement, they will grind each other and destroy the matrix structure more quickly.