HOT LINE: +86-510-80628100HOT LINE: +86-510-80628100Due to the high temperature strength, low thermal conductivity, high plasticity, and toughness of high-temperature alloys, the cutting temperature and force during cutting are high, and they are prone to work hardening, causing various forms of wear such as abrasive, bonding, and diffusion on the cutting tool, resulting in a rapid decrease in tool life. Scholars have conducted extensive research on the cutting process of high-temperature alloys and summarized the following three points:
(1) As the temperature increases, the high-temperature hardness of hard alloys decays rapidly, while the high-temperature hardness of ceramics decreases steadily and can still maintain good material properties at higher temperatures; The high temperature hardness of high-temperature alloy workpiece materials does not decrease significantly below 700 ℃, and only shows a significant downward trend after exceeding 700 ℃, which also reflects the difficult machinability of high-temperature alloys.
(2) When the cutting temperature is not higher than 600 ℃, hard alloy cutting tools can be used for machining; When the cutting temperature exceeds 600 ℃, the rapid decay of high-temperature hardness of hard alloys can lead to insufficient cutting performance, while ceramic cutting tools still have good high-temperature performance at high temperatures, with lower tool wear in the measured temperature range, and the optimal cutting temperature is above 700 ℃, making them ideal tool materials for processing high-temperature alloys.
(3) In terms of the selection of cutting parameters, when processing high-temperature alloys, the cutting speed of hard alloy cutting tools should not exceed 90m/min. To improve cutting efficiency, the feed rate and cutting depth should be appropriately increased without increasing the cutting speed; On the premise that ceramic cutting tools have much higher cutting efficiency than hard alloys and lower tool wear, a machining strategy with a cutting speed higher than 500m/min should be adopted to achieve efficient and high-quality machining of high-temperature alloys.
