针对某种高强度钢材料，在改造的CE7132A仿形正交车铣机床上进行了一系列的正交车铣刀具磨损试验，分析并研究了正交车铣高强度钢时刀具的磨损过程、磨损形态和磨损机理。发现车铣刀具的磨损形态为前刀面的月牙洼磨损与刀具表层材料的剥落磨损，后刀面的磨损以及副后刀面的磨损。车铣刀具的磨损机理与切削速度和刀具材料、工件材料相关，在较低的切削速度下以疲劳一剥落磨损、粘结磨损为主，在此基础上伴随有磨料磨损和扩散磨损等；而在较高的切削速度下以扩散磨损为主，并伴随有疲劳一剥落磨损、粘结磨损和磨料磨损等。切削速度对车铣刀具的磨损过程、磨损形态及磨损机理等影响最大。

The authors finished a series of orthogonal turn-milling tool wear experiments on a rebuilt profile mod?eling machine. The wearing configuration of machining 58SiMn steel in turn-milling is rake face wears, flank face wears and minor flank face wears. Configuration of wear and mechanism of orthogonal turn-milling tool in orthogonal turn-milling high strength steel were studied. Compared to normal turning and milling, minor flank face wears are even more severe. Additionally, as the minor flank face wears influence on the machined surface quality, its quantity is defined as the standard of tool life in turn-milling. Mechanism of tool wearing in turn- milling is fatigue-exfoliative wearing, felted wearing in lower cutting speed, and diffuse wearing in higher cut?ting speed, accompanied with abrasive wearing. Under different cutting conditions the mechanism of turn- milling tool is different, the degree that cutting speea influences on the turn-milling tool wearing is the greatest. Fatigue-exfoliative wearing, felted wearing and abrasive wearing go along almost all the time, while diffuse wearing enters on the leading only when the cutting speed reaches a definite value.