NM400, NM450, and NM500 grade high wear resistant steel plate is widely used in mining machinery, coal mining and transportation, construction machinery, agricultural machinery, building materials, electric machinery, railway transportation, and other departments. For example, the bucket teeth and buckets of excavators, the tooth plates and hammers of various crushers, the track shoes of tractors and tanks, the shovels of bulldozers, and the linings of large-scale electric wheels are mainly limited to the application of wear resistant steel subjected to abrasive wear, and all kinds of machines will produce various types of wear, and there will be requirements for improving the wear resistance of workpiece materials or using wear resistant steel.