When cutting steel plate, it will produce high temperature, especially when using high temperature cutting methods such as plasma cutting or laser cutting, it will produce heat affected zone (HAZ) on the surface of NM500 steel plate, which will lead to the decrease of its hardness, but it will not directly lead to the annealing of steel plate. If the stress on the steel plate after cutting is large, small plastic deformation and local defects may occur, but these conditions are different from annealing of the steel plate.
NM500 steel plate is a kind of high-strength wear-resistant steel plate. Because of its excellent physical and mechanical properties such as high strength and hardness, it is widely used in heavy machinery and equipment. When cutting NM500 steel plate, it is necessary to adopt appropriate processing technology and methods to maintain its excellent performance characteristics. After cutting, NM500 steel plate must be properly heat treated, such as tempering, to restore its performance index and ensure its service life.