According to the editor of the DOWELL metal laser cutting machine, we understand that not all metals can be cut by gas cutting. For example, copper and copper alloys cannot be cut by gas cutting. Whether metals can be gas cut, let DOWELL metal laser cutting machine manufacturers make a small braid now. Everyone will judge from the following aspects.
4 reasons why metals can be cut by oxygen:
1.Whether the ignition point of metal in oxygen is lower than the melting point
The essence of gas cutting is that the metal burns into slag in oxygen, and the slag is blown away to form incisions. Therefore, to enable the metal to be cut, the ignition point of the metal in oxygen must be lower than the melting point, otherwise, the metal will melt before it burns, which is not the so-called gas cutting. Moreover, the material melts before burning, and the quality of the cut obtained will be poor.
2.Is the melting point of the slag (oxide) of the metal combustion sound field lower than the melting point of the metal?
And whether the slag has good fluidity in the liquid state. Generally speaking, the melting point of the slag produced by metal combustion should be lower than the melting point of the metal. If the melting point of the slag is higher than the melting point of the metal, the slag will solidify before the liquid metal solidifies, thereby forming a solid film on the surface of the liquid metal, or the formed slag has a higher viscosity and is not easily removed by cutting oxygen. Blow away from the incision. Metal is difficult to gas cut. However, if the generated slag has good fluidity and low viscosity, and the slag can be blown away from the incision by cutting oxygen, then the metal can be gas-cut.
3.When metal burns in oxygen, can it release more heat?
An important condition for smooth cutting is to ensure that the metal at the leading edge of the incision can be quickly and continuously heated to the ignition point. Therefore, sufficient heat generated by the gas flame and metal combustion is required to ensure that the above conditions are met. If the metal burns in oxygen, the amount of heat released is too small too quickly and continuously heat the metal at the front edge of the incision to the ignition point, and the heavy metal is difficult to be gas-cut.
4.Whether the thermal conductivity of the metal is too good.
The heat generated by the gas flame and the heat generated by the burning of the metal are not all used to heat the metal at the front edge of the incision, but only a part of it, and the other part is lost through radiation, heat conduction, etc. If the thermal conductivity of the metal is too good, and the heat used to heat the metal at the leading edge of the incision is not enough to ensure that the metal at the leading edge of the incision can be quickly and continuously heated to the ignition point, the cutting will be difficult to proceed smoothly.
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