Heavy Plate Flame Cutting Method

In modern heavy plate production plants, steel plates with a thickness of more than 50mm account for a considerable proportion of the total output. However, due to the limitation of shearing equipment, steel plates of this thickness range are generally cut by flame cutting machines. Various elements in the steel have certain effects on the flame cutting characteristics. For example, the gas cutting performance of C content exceeding 0.5% is relatively poor, and the gas cutting is difficult if the C content exceeds 1% to 1.2%.

 

In modern heavy plate production plants, steel plates with a thickness of more than 50mm account for a considerable proportion of the total output. However, due to the limitation of shearing equipment, steel plates of this thickness range are generally cut by flame cutting machines. Various elements in the steel have certain effects on the flame cutting characteristics. For example, the gas cutting performance of C content exceeding 0.5% is relatively poor, and the gas cutting is difficult if the C content exceeds 1% to 1.2%.

 

 Flame cutting equipment has low cost and is the only cost-effective way to cut thick metal plates, but it has its shortcomings in cutting thin plates. Compared with plasma, the heat-affected zone of flame cutting is much larger and the thermal deformation is larger. In order to cut accurately and effectively, the operator needs to have superb technology to avoid the thermal deformation of the metal plate in time during the cutting process.

 

 Laser cutting: Laser cutting equipment can cut stainless steel below 4mm, and adding oxygen to the laser beam can cut 20mm thick carbon steel, but after oxygen cutting, a thin oxide film will be formed on the cutting surface. The maximum cutting thickness can be increased to 20mm, but the size error of the cutting part is large.