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Experimental Study on High Speed Milling of γ-TiAl Alloy

机译:γ-TiAl合金高速铣削的实验研究

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This paper deals with the milling machinability of gamma titanium aluminide at speeds of 60-240m/min. The results showed that surface roughness was less than Ra0.44μm at all cutting speeds used in the tests even when the tool wear reached VB0.2mm. The milling forces increased slightly with increasing cutting speed but increased rapidly with the elevated flank wear value especially for the Fy component. Compared to those of titanium alloy TA15, the milling forces of γ-TiAl were 190%, 180% and 200% greater for Fx, Fy and Fz respectively under the same machining conditions. Workpiece surface has a maximum microhardness of approximately 600HV_(0.100), and the depth of maximum hardened layer was confined to 180μm below the surface. When cut with TiAlN coated carbide tool, tool life was 35 min which was only about 1/2 of that for titanium alloy TA15.
机译:本文研究了60-240m / min速度下的γ-铝化钛的铣削加工性能。结果表明,即使在工具磨损达到VB0.2mm的情况下,在测试中使用的所有切削速度下,表面粗糙度均小于Ra0.44μm。铣削力随切削速度的增加而略有增加,但随着侧面磨损值的增加而迅速增加,尤其是对于Fy零件。与钛合金TA15相比,在相同的加工条件下,Fx,Fy和Fz的γ-TiAl铣削力分别大190%,180%和200%。工件表面的最大显微硬度约为600HV_(0.100),最大硬化层的深度被限制在表面以下180μm。用TiAlN涂层硬质合金刀具切割时,刀具寿命为35分钟,仅为钛合金TA15寿命的1/2左右。

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