The main cutting materials of laser cutting machine are stainless steel, alloy steel, iron, aluminum, zinc, magnesium and other alloy materials. Different materials have different hardness and different cutting difficulties. The following professional laser cutting machine manufacturer Men-Luck explains the difficulties of laser cutting for ordinary steel and high-temperature alloys.
1. The material has poor thermal conductivity
When the laser cutting machine cuts the alloy, it will generate a lot of cutting heat, which is borne by the front tap, and the tip of the knife bears the laser cutting temperature of 700-9000°. Under the action of this high temperature and cutting force, the cutting edge will produce plastic deformation , bonding and diffusion wear.
2. Large laser cutting force
The strength of superalloys is more than 30% higher than that of alloy steels commonly used in steam turbines. At a cutting temperature above 600°C, the strength of nickel-based superalloys is still higher than that of ordinary alloy steels. The unit cutting force of unstrengthened high-temperature alloy is above 3900N/mm2, while that of ordinary alloy steel is only 2400N/mm2.
3. Large tendency to work hardening
For example, the hardness of the unstrengthened substrate of GH4169 is about HRC37. After cutting by a metal laser cutting machine, a hardened layer of about 0.03mm will be formed on the surface, and the hardness will increase to about HRC47, with a hardening degree of up to 27%. The phenomenon of work hardening has a great influence on tap life with oxidized fronts, often resulting in severe boundary wear.
Relatively speaking, ordinary materials are better for cutting, and high-temperature alloy materials with higher hardness are more difficult to cut. Different cutting solutions should be provided for different cutting problems. For more questions about laser cutting, please consult Men-Luck laser cutting equipment manufacturer.
Post time: Jul-04-2023