【摘要】 高温合金是一种在航天飞机、运载火箭和相控阵雷达等产品上得到广泛应用的难加工材料，选择合适的刀具材料和切削用量是进行优质、高效、低消耗的精益生产时遇到的技术瓶颈。针对GH4169高温合金进行了切削加工实验，探讨了不同刀具在加工高温合金时的切削温度与刀具磨损情况，并通过硬质合金、陶瓷刀具材料与GH4169工件材料的高温特性研究，得到高温硬度特性曲线。切削实验与高温硬度实验的综合研究结果表明，由于硬质合金的高温硬度衰减较快，硬质合金刀具加工高温合金时切削温度应不高于600℃,宜采用较低切削速度的加工策略以减缓刀具磨损；陶瓷刀具的高温性能优越，宜在切削温度高于700℃的条件下加工高温合金，即可以采用较高的切削速度实现高温合金的高效、高质量加工。更多还原

【Abstract】 superalloy is a kind of difficult to process material widely used in high-end products such as space shuttle, launch vehicle and phased array radar.The selection of appropriate tool materials and cutting parameters is the technical bottleneck encountered by manufacturing enterprises in organizing lean production with high quality, high efficiency and low consumption.By studying the high temperature characteristics of tool and workpiece materials, the high temperature hardness characteristic curves of materials are obtained.The cutting experiments of superalloy GH4169 is carried out, and the cutting temperature and tool wear of different tools in machining superalloy are obtained.The results of comprehensive cutting experiment and high-temperature hardness research show that, due to the rapid attenuation of high-temperature hardness of cemented carbide, when machining high-temperature alloy with cemented carbide, the cutting temperature should not be higher than 600℃,and the machining strategy is to adopt lower cutting speed to slow down tool wear.The high temperature performance of ceramic cutting tool is superior, and it is suitable to process superalloy at cutting temperature higher than 700℃,that is, to achieve high efficiency and high quality processing of superalloy with higher cutting speed.更多还原