How to avoid bursting of wear-resistant plate during cutting

Due to its high hardness, the wear-resistant plate is one of the commonly used raw materials in the manufacturing process of engineering machinery and mining equipment. In the process of selling the wear-resistant plate, sometimes customers will report that the wear-resistant plate is cracked in the cutting process, especially when the temperature is relatively low in winter. But the performance of all parties of the wear-resistant plate purchased completely meets the standard requirements when leaving the factory.

Based on this situation, the explanation given by the steel factory is as follows: flame cutting process of wear-resistant plate (except water knife cutting): please follow the following minimum preheating temperature for flame cutting of finished plate:
The minimum preheating temperature is 100 ℃ when the plate thickness is less than 30mm,
The plate thickness is 30 ~ 50mm, and the minimum preheating temperature is 150 ℃,
The plate thickness is 50 ~ 80mm, and the minimum preheating temperature is 170 ℃,
If the plate thickness is greater than 80mm, the preheating temperature shall be appropriately increased as appropriate, and the maximum preheating temperature of all thicknesses shall not be greater than 300 ℃.

Customers should adopt preheating and slow cooling methods when cutting wear-resistant plates with heat source, so as to prevent the problem of delayed crack caused by flame cutting.