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钛合金TB6侧铣表面完整性实验

DOI: 10.13700/j.bh.1001-5965.2013.0394, PP. 849-854

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Abstract:

使用表面完整性基本评价方法对TB6钛合金侧铣后试件的表面完整性(表面形貌、表面粗糙度、加工硬化)进行研究.结果表明,对表面形貌影响最明显的因素是每齿进给量fz,过大的fz会使已加工表面出现鳞刺现象.fz是影响已加工表面进给方向粗糙度的最主要因素,随着fz从0.06mm/z增大到0.12mm/z,表面粗糙度Ra会由0.283μm显著增加到0.964μm.线速度vc,fz和径向切深ae的变化对刀轴方向粗糙度影响很小.而刀具的后刀面磨损是影响已加工表面刀轴方向粗糙度的主要因素,极轻微的后刀面磨损都会导致刀轴方向粗糙度明显增加,随着后刀面磨损量VB由0增加到0.025mm,刀轴方向粗糙度由0.22μm剧烈增加到0.686μm.侧铣过程中TB6的加工硬化现象不严重,表层组织没有明显变质层产生,晶粒也没有出现明显的拉伸、扭曲或破裂.

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