高速切削可以加工淬火钢，材料硬度可高达60HRC以上，加工过程甚至可以不用切削液，这就是所谓的硬切削(Hard Machining)和干切削(Dry Machining)。
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Gear Hard Machining Supervisor 齿轮硬加工主管
high-speed hard machining 高速硬加工
hard-machining material 难加工材料
precision hard machining 精度硬切削
Hard and dry machining 硬态干式切削
o machining hard materials 硬材料加工
hard part machining 硬态切削
Technology of deep and small hole finishing has been researched on emphasis for its wide range application and hard machining.
对分析总结了国内外小直径深孔加工技术，介绍了当前孔加工的最新技术和国内在这方面的研究情况。
Short arc machining (SAM) technique has special performance on machining hard machining materials which have great rigidity, intensity and tenacity.
短电弧加工技术在对特硬、超强、高韧性等难加工材料的加工方面具有突出的优良性能。
Because of the different material with cylinder lid of one mini-aero engine, the hard machining process of grinding on the same plane is a key, which affects its performance.
某小型航空发动机气缸盖由于有喷钼涂层，不同材料的同一平面磨削时难加工是制约该型号发动机性能的关键工艺。
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