High temperature alloys are widely used in manufacturing fields such as aerospace and energy due to their excellent high-temperature strength, corrosion resistance, and oxidation resistance. However, this material has high hardness, strong toughness, and poor thermal conductivity, posing a serious challenge to the accuracy and efficiency of high-speed engraving and milling processing. Mastering the application skills of science is the key to solving the difficult problems in high-temperature alloy processing.
Tool selection is a fundamental prerequisite for machining. In high-temperature alloy processing, cutting tools need to withstand high temperature, high pressure, and severe friction. Ordinary high-speed steel cutting tools are prone to problems such as blade breakage and rapid wear. It is recommended to prioritize the use of ultra-fine grain hard alloy cutting tools, as their hardness and wear resistance are more suitable for the material characteristics; For high-precision machining scenarios, cubic boron nitride (CBN) cutting tools can be used to effectively improve cutting stability. The geometric parameters of the cutting tool need to be optimized in a targeted manner. The rake angle should be between 5 ° and 10 ° to reduce cutting resistance, and the rake angle should be between 8 ° and 12 ° to reduce wear on the back cutting surface. The cutting edge needs to be passivated to avoid stress concentration that may cause the cutting edge to collapse.
Optimizing processing parameters is the core of improving efficiency. The selection of rotational speed should take into account both tool life and machining quality. When using hard alloy cutting tools to process high-temperature alloys, the rotational speed is usually controlled between 3000-6000r/min. If it is too high, it can cause the tool to rapidly heat up, while if it is too low, it can reduce machining efficiency. The feed rate should be adjusted according to the cutting depth, generally ranging from 50-200mm/min. Adopting the strategy of "low cutting depth, high feed rate" can reduce the contact time between the tool and the material and reduce heat accumulation. It is recommended to control the cutting depth between 0.1-0.5mm. A single deep cutting can easily cause tool vibration and affect machining accuracy.
The design of cooling and chip removal system is the key to ensuring quality. The cutting heat concentration generated during high-temperature alloy processing, if not cooled in time, can easily lead to workpiece deformation and increased tool wear. It is recommended to use a high-pressure internal cooling system, with emulsion or specialized cutting fluid as the cooling medium. The pressure should be controlled at 5-10MPa to ensure that the cooling fluid reaches the cutting area directly. The chip removal design needs to avoid chip accumulation. A tilted worktable combined with a high-pressure blowing device can be used to clean the chips in a timely manner, preventing them from scratching the surface of the workpiece or causing secondary cutting.
In addition, precise positioning of the workpiece is required before processing, and hydraulic clamping devices are used to enhance clamping stability; During the machining process, the real-time monitoring system can monitor the tool wear status and replace the tool in a timely manner. By optimizing multidimensional techniques such as cutting tools, parameters, and cooling, it is possible to effectively solve the difficulties of high-temperature alloy processing, fully leverage the processing advantages of high-speed engraving and milling machines, and provide reliable processing solutions for the manufacturing industry.