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1. Carbon steel
Because carbon is contained in carbon steel, the laser reflection is not strong and it absorbs the beam very well. Carbon steel is suitable for laser cutting of all metal materials. Therefore, the position of laser cutting machine in carbon steel processing is unshakable. Carbon steel is widely used. Modern laser cutting machines can cut carbon steel plates with a maximum thickness of 20mm. Through the oxidation melting and cutting mechanism, the gap of carbon steel can be controlled within a satisfactory width. It is about 0.1 mm.
2. Stainless steel
Laser cutting stainless steel uses the energy released by a laser beam to melt and evaporate stainless steel. Laser cutting is a fast and effective method for manufacturing stainless steel plates. The important technical parameters that affect the quality of stainless steel cutting are cutting speed, laser power, air pressure and so on. Compared with carbon steel, the laser power and oxygen pressure for stainless steel cutting are higher. Although stainless steel cutting has achieved satisfactory cutting results, it is difficult to obtain joints without sticky residues. The laser beam coaxial injection method blows away the molten metal, so there is no oxide on the cut surface. This is a good method, but it is more expensive than traditional oxygen cutting. One way to replace pure nitrogen is to use filtered plant compressed air, which contains 78% nitrogen. Laser film is to prevent severe burns when laser cutting mirror stainless steel
3. Aluminum and alloys
Although laser cutting machines can be widely used in the processing of various metal and non-metal materials. However, some materials, such as copper, aluminum and their alloys, are difficult to process due to their own properties (high reflectivity). At present, laser cutting of aluminum plates has been widely used in fiber lasers and YAT lasers. Both of these equipment, whether it is cutting aluminum or other materials, such as stainless steel and carbon steel, have good performance, but they cannot process thick aluminum. Generally speaking, the maximum thickness of 6000W can be reduced to 16 mm, and 4500W can be reduced to 12 mm, but the processing cost is very high. The auxiliary gas used is mainly used to blow the molten product away from the cutting area, and generally can achieve better cutting quality. For some aluminum alloys, it is necessary to prevent microcracks on the surface of the gap.
4. Copper and alloys
Pure copper (copper) cannot be cut by carbon dioxide laser beam due to its high reflectivity. Brass (copper alloy) uses higher laser power and assists gas cutting of thinner plates with air or oxygen
5. Titanium and alloys
Titanium commonly used in the aircraft industry The alloy laser cutting is of good quality. Although there will be some sticky residue at the bottom of the crevice, it is easy to clean. Pure titanium can be combined with the heat generated by laser beam conversion. When oxygen is used as the auxiliary gas, the chemical reaction is violent and the cutting speed is fast. However, the oxide layer is easily formed on the tip. Inadvertently, it can also cause excessive burning. For stability, it is best to use air as an auxiliary gas to ensure cutting quality.
6. Alloy steel
Most alloy structural steels and alloy tool steels can be laser cut to obtain good trim quality. Even for some high-strength materials, if the process parameters are properly controlled, a smooth and non-sticky slag dressing can be obtained. However, for high-speed tool steels and hot working die steels with tungsten, corrosion and slag will occur during laser cutting machine processing.
7. Nickel alloys
There are many types of nickel-based alloys. Most of them can be oxidized, melted and cut.
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