Ions are the fourth state of matter. If ice changes from a solid state to a liquid state (water) with the increase of temperature, it will become a gas state after heating and a plasma state (i.e. plasma) after heating to a certain temperature. The negatively charged electrons and positively charged ions in plasma are in equilibrium, and it can pass a large current, so the energy density is very high and the temperature is very high. By controlling the energy density, temperature and running speed of plasma arc, metal can be cut, welded and sprayed. Plasma arc cutting is to use plasma arc to heat the cutting metal to a molten state, and then use auxiliary gas to blow the molten metal away to achieve the purpose of cutting.

Generally, the temperature of compressed plasma arc is 10000 ~ 15000℃, and the highest temperature after water recompression can reach 50000℃, so the energy density of arc is quite high. When cutting the thin plate with the thickness less than Δ Δ 20 mm, it has the advantages of high speed, small deformation, high precision and high section smoothness.

After the plasma arc is ejected from the nozzle, the energy density, flow rate and temperature of the gas drop rapidly. For example, when the working current is 200A, the plasma arc flux from the nozzle 1040 mm/s is 1040mm/s, and rapidly drops to 760mm/min at 20mm, resulting in uneven temperature distribution in the thickness direction during cutting, which is easy to cause slag hanging above the incision and melting below. Therefore, the plasma arc cutting method is more suitable for thin plate cutting, but it can cut a wide range of materials, including almost all conductive metal materials, such as high alloy steel, copper, aluminum and so on.

I hope it helps you!