1, Wear resistant plate grades: NM360, NM400, NM450, NM500, NM600.
Wear resistant plate performance: strong impact resistance, high temperature resistance, and strong corrosion resistance
2, The reason for the failure of the wear-resistant plate (NM400 NM500) is:
1. The working or storage environment of wear-resistant plates exhibits strong abrasive wear phenomenon. This phenomenon is called wear failure, which is the main way for all metal surfaces such as wear-resistant castings to fail. In general, the hardness of wear-resistant parts is more than twice that of materials to achieve better wear resistance. The hardness resistance is the hardness of the working surface of wear-resistant parts after wear, rather than the initial hardness before wear. But it's not necessarily that higher hardness is better, because higher hardness makes wear-resistant parts more brittle and more prone to fracture.
2. Wear resistant plates may fracture or be subjected to significant impact during use. If the wear-resistant parts are not installed properly, such as when the lining plate is installed, the back and the cylinder body are not in contact but in local contact, which is prone to fracture. Improving the impact and toughness of wear-resistant parts and reducing their crack propagation speed will be beneficial for fracture resistance. At present, welding wear-resistant materials have replaced wear-resistant casting products.
3. Deformation failure refers to the low yield strength of wear-resistant parts, resulting in severe macroscopic plastic deformation and failure of castings due to external forces during use. Failure is more common in wear-resistant manganese steel parts with lower yield strength, such as in high impact ball mill conditions. Severe reverse arch deformation of manganese steel lining plates can break bolts or cause displacement and detachment between lining plates.
