TC4钛合金高速铣削参数对表面完整性影响研究

Effects of High-Speed Milling Parameters on Surface Integrity of TC4 Titanium Alloy

文章研究了用硬质合金刀具高速铣削TC4钛合金时,铣削参数对表面完整性(表面粗糙度、表面形貌、显微硬度和微观组织)的影响,以期为优化TC4钛合金高速铣削参数,及进行表面完整性控制研究提供相关的实验数据基础。主轴转速(r/min)依次选择3 000、6 000、8 000、10 000,轴向切深分别选择0.15 mm和0.25 mm,每齿进给量恒为0.05 mm/z。结果表明:主轴转速对表面粗糙度、表面形貌、显微硬度的影响显著;轴向切深对表面粗糙度和表面形貌的影响比较显著,对硬化深度和硬化程度影响不大;主轴转速和轴向切深对微观组织的影响不明显;在实验参数范围内,当转速为8 000 r/min、轴向切深为0.15 mm时,可以获得最好的表面完整性,此时,表面粗糙度为0.313μm、硬化深度为0.06 mm、硬化程度为15%、微观组织无明显变化。

In order to provide relatively systematic experimental basis for optimizing the high-speed milling parameters of Chinese TC4 titanium alloy,the effects of high-speed milling parameters on surface integrity of TC4 titanium alloy processed with cemented carbide cutter were investigated.Section 1 of the full paper selects the lowest of three levels of evaluation criteria of surface integrity from Ref.8,which is the translation of a U.S.technical manual.Section 2 explains our surface integrity experiments on hi...