What is plasma cutting? The Chengdu plasma cutting machine uses a plasma arc to penetrate the surface of the material to achieve the cutting effect. The plasma arc often cuts more metal from the upper part of the cut than the lower part, making the end face of the cut slightly inclined, and the upper edge is generally square, but sometimes Slightly rounded. May cause the distance between the two cutting faces at the upper edge of the cut caused by the cutting beam. When the upper edge of the cut is melted, the distance between the two cutting surfaces immediately below the melted layer is abnormal.
The width of the cut of the arc cutting of the portable plasma cutter is 1.5 to 2 times wider than that of the oxygen-acetylene cutting. As the thickness of the plate increases, the width of the cut also increases. For stainless steel or aluminum with a thickness of less than 25mm, it can be cut with a small current plasma arc. The flatness of the cut is very high, especially when cutting a plate with a thickness of less than 8mm, small edges can be cut without even processing. Welding is performed directly, which is difficult to obtain by high current plasma arc cutting. This is convenient for cutting thin plates with irregular curves and cutting irregular holes.
When using a high-energy ion arc to cut a portable plasma cutting machine, in order to ensure the consistent width of its cuts, it is necessary to comprehensively analyze and consider various parameters. This involves the material of the cutting material, the content ratio of various metals, and the control of the cutting torch height during the cutting process. Under normal circumstances, there is a fused layer with a thickness of about 0.25 to 3.80 mm on the surface of the plasma arc incision, but the chemical composition on the surface of the incision has not changed. For example, when cutting an aluminum alloy containing Mg5%, although there is a 0.25mm thick molten layer, the composition remains unchanged and no oxide appears. Dense welds can also be obtained by welding directly with a cut surface. When cutting stainless steel, because the heated zone quickly passes the critical temperature of 649 ° C, chromium carbide will not precipitate along the grain boundaries. Therefore, cutting stainless steel with a plasma arc will not affect its corrosion resistance.