Difficulties of cutting superalloy with CNC cutting machine

High-temperature alloys have the unique characteristics of high hardness and high temperature resistance, which makes it difficult to guarantee the accuracy of laser cutting by CNC cutting machines. After preheating, the CNC flame cutting machine can cut steel and low-alloy steel with a carbon equivalent of more than 0.4%. As the proportion of metal components increases, the cutting process will become more and more difficult. Therefore, chromium steel, nickel or silicon metal, cast steel and other materials do not have special preventive measures and are not suitable for oxygen extraction. These materials should be eagerly cut by other processing methods. So, how elegant is the CNC cutting machine compared with ordinary steel and high-temperature aluminum alloy? For example, after the GH4169 alloy is cut by the hrc37 metal CNC cutting machine, the matrix hardness can reach about 0.03 mm, the hardness can be increased to about hrc47, and the quenching hardness can reach 27%. The work hardening phenomenon has a great influence on the service life of the oxidizing faucet, and it usually leads to severe boundary wear.

2. Under the action of high temperature and large cutting force, cutting materials with poor thermal conductivity

When cutting, the end of the tool will withstand the cutting of 8001000c Temperature, which will generate a lot of cutting heat. Tip connection and diffusion wear

3. The strength of high-temperature alloy with high cutting force is more than 30% higher than ordinary alloy steel for steam turbine. When the cutting temperature is higher than 600 degrees Celsius, the strength of nickel-based superalloy is still higher than that of ordinary alloy steel. With the development of the modern machinery processing industry, the requirements for cutting quality and accuracy are constantly increasing, and the requirements for improving production efficiency, reducing production costs, and improving intelligent automatic cutting functions are also constantly increasing. The development of CNC cutting machines must adapt to the requirements of modern machinery processing industry. The unit cutting force of non-mandatory alloy exceeds 4000 n/mm~2, while the unit cutting force of ordinary alloy steel is only 2500 n/mm~2.

4. Wear

The main components of the base alloy are nickel and chromium, in addition to a small amount of other elements: silicon, aluminum, copper, tungsten and other titanium, copper, tungsten, etc. are also used Manufacturing cement carbide (or high-speed steel) oxide tips. The CNC cutting machine uses a digital program to drive the movement of the machine tool. When the machine tool moves, the cutting tool will be randomly equipped with cutting objects. This kind of electromechanical machine cutting machine is called CNC cutting machine. After decades of development, the control system of the CNC cutting machine has evolved from simple functions, complex programming input modes, and low automation to a fully functional intelligent, graphical, and networked control mode: the drive system has also changed from stepper drive, The analog servo drive is transformed into a fully digital servo drive. When these oxide needles are used to process high-temperature alloys, there will be diffusion wear and abrasive wear.

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