Ti-6Al-4V锻件与粉末冶金材料切屑形貌的对比研究
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摘要
利用热等静压工艺制备高致密度的Ti-6Al-4V粉末冶金材料,对比Ti-6Al-4V锻件和粉末冶金材料切屑的横截面形貌和特征参数,研究粉末冶金材料的残余微孔隙和显微结构对切屑形成的影响。结果表明:粉末冶金材料切屑锯齿状结构的高度和密度均小于锻件,粉末冶金材料切屑的分离频率小于锻件。
Ti-6Al-4V powder metallurgy material with high relative density was prepared using hot isostatic pressing process. The influences of residual micro-void and microstructure of the material on chip formation were studied based on comparsions of chip cross section morphologies and characteristic parameters of Ti-6Al-4V forging and powder metallurgy materials. The results show that:the height and the density of serrated structure of the powder metallurgy material chip are less than that of the forging material chip,respectively. And the chip segmentation frequency of the powder metallurgy material is less than that of the forging material.
Ti-6Al-4V powder metallurgy material with high relative density was prepared using hot isostatic pressing process. The influences of residual micro-void and microstructure of the material on chip formation were studied based on comparsions of chip cross section morphologies and characteristic parameters of Ti-6Al-4V forging and powder metallurgy materials. The results show that:the height and the density of serrated structure of the powder metallurgy material chip are less than that of the forging material chip,respectively. And the chip segmentation frequency of the powder metallurgy material is less than that of the forging material.
引文
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[2]MOLINARI A,SOLDANI X,MIGUéLEZ M H.Adiabatic shear banding and scaling laws in chip formation with application to cutting of Ti-6Al-4V[J].Journal of Mechanics and Physics of Solids,2013,61(11):2331-2359.
[3]DUAN Chunzheng,WANG Minjie,PANG Junzhong,et al.Acalculational model of shear strain and strain rate within shear band in a serrated chip formed during high speed machining[J].Journal of Materials Processing Technology,2006,178(1/2/3):274-277.
[4]SUN Fujian,QU Shengguan,PAN Yuxiang,et al.Machining performance of a grooved tool in dry machining Ti-6Al-4V[J].International Journal of Advanced Manufacturing Technology,2014,73(5/6/7/8):613-622.
[5]MIGUéLEZ M H,SOLDANI X,MOLINARI A.Analysis of adiabatic shear banding in orthogonal cutting of Ti alloy[J].International Journal of Mechanical Sciences,2013,75:212-222.
[6]SUN Shoujin,BRANDT M,DARGUSCH M S.Characteristics of cutting forces and chip formation in machining titanium alloys[J].International Journal of Machine Tools&Manufacture,2009,49(7/8):561-568.
[7]DINC C,LAZOGLU I,SERPENGUZEL.Analysis of thermal fields in orthogonal machining with infrared imaging[J].Journal of Materials Processing Technology,2008,198(1/2/3):147-154.
[8]FLOM D G,KOMANDURI R,LEE M.High-speed machining of metals[J].Annual Review of Materials Science,1984,14:231-278.
[9]POULACHON G,MOISAN A L.Hard turning:Chip formation mechanisms and metallurgical aspects[J].Journal of Manufacturing Science and Engineering-Transactions of the ASME,2000,122:406-412.
[10]COTTERELL M,BYRNE G.Dynamics of chip formation during orthogonal cutting of titanium alloy Ti-6Al-4V[J].CIRPAnnals-Manufacturing Technology,2008,57(1):93-96.
[11]GUO Ping,ZHAO Yongqing,ZENG Weidong,et al.The effect of microstructure on the mechanical properties of TC4-DTtitanium alloys[J].Materials Science&Engineering A,2013,563:106-111.
[12]SUN Jie,GUO Y B.A new multi-view approach to characterize 3D chip morphology and properties in end milling titanium Ti-6Al-4V[J].International Journal of Machine Tools&Manufacture,2008,48(12/13):1486-1494.
[13]SUN F J,QU S G,LI G,et al.Comparison of the machinability of titanium alloy forging and powder metallurgy materials[J].International Journal of Advanced Manufacturing Technology,2016,85(5/6/7/8):1529-1538.