Matters needing attention in casting process of wear resistant steel plate

Wear resistant steel plate is more and more widely used in today's society, making some manufacturers mass production, the market is still in short supply, the prospect is very broad. In the production process of wear resistant steel plate, the carbon content must be controlled well. For NM360 wear resistant steel plate, its C content is 0.12%, which is longitudinal fracture. For steel with high S, P and Se content, the probability of longitudinal fracture will increase a lot. For some steel, the longitudinal fracture rate of 1.35% manganese is higher than that of 0.7% manganese.

Peritectic reaction often occurs in the cooling and solidification process of wear resistant steel plate, accompanied by larger volume change and linear shrinkage, which is mainly due to the hot crack of continuous casting slab in the casting process. In the mold, the heat load around the meniscus of molten steel from the slab is too much or the heat load is not uniform, resulting in uneven heating, which is more likely to cause longitudinal cracks.

There is also a need to pay attention to: when pouring wear resistant steel plate with high Mn content, the content of manganese oxide in mold flux will increase in the process of pouring. The higher the Mn content in wear resistant steel plate, the more manganese oxide content in mold flux. The higher the content of manganese oxide is, the lower the viscosity of mold flux will be, and the better the initial viscosity will be.

Therefore, when pouring steel with high Mn content, some manganese oxide should be added in the initial slag in advance to prevent the above events. In order to prevent the longitudinal crack of wear resistant steel plate, some measures are often taken, such as reducing the content of P, S and Se in NM360 wear resistant steel plate.