不同致密度Ti-6Al-4V粉末冶金工件的表面形貌及粗糙度Surface morphology and roughness of Ti-6Al-4V powder metallurgy workpieces with different relative densities
孙富建;屈盛官;邓朝晖;李小强;
摘要(Abstract)：
研究具有不同致密度的Ti-6Al-4V粉末冶金工件表面形貌,分析切削参数和致密度对其表面粗糙度的影响。Ti-6Al-4V粉末冶金工件表面出现因材料内部残余微孔隙而引起的微孔隙缺陷,且微孔隙缺陷随着粉末冶金材料致密度的减小而增大。随着工件相对致密度的降低,工件表面粗糙度先增大后降低。利用3水平4因素正交试验研究切削参数与材料致密度对工件表面粗糙度的影响,工件致密度对表面粗糙度的影响程度最小,在实际生产加工中可以忽略。获得已加工工件表面粗糙度的最优组合:切削速度为30 m/min、进给量为0.05 mm/r、切削深为1.5 mm和致密度为98.80%。
关键词(KeyWords)： Ti-6Al-4V;粉末冶金材料;致密度;表面形貌;表面粗糙度
基金项目(Foundation): 湖南省教育厅科学研究项目(17C0639)
作者(Author): 孙富建;屈盛官;邓朝晖;李小强;
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DOI:
参考文献(References)：
- [1]ROBERT-PERRON E,BLARIS C,THOMAS Y,et al.An integrated approach to the characterization of powder metallurgy components performance during green machining[J].Materials Science and Engineering,2005,402:324-334.
- [2]SUN J,GUO Y B.A comprehensive experimental study on surface integrity by end milling Ti-6Al-4V[J].Journal of Materials Processing Technology,2009,209:4036-4042.
- [3]RAMESH S,KARUNAMOORTHY L,PALANIKUMAR K.Measurement and analysis of surface roughness in turning of aerospace titanium alloy(gr5)[J].Measurement,2012,45:1266-1276.
- [4]XU L,GUO R P,BAI C G,et al.Effect of hot isostatic pressing conditions and cooling rate on microstructure and properties of Ti-6Al-4V alloy form atomized powder[J].Journal of Materials Science Technology,2014,30:1289-1295.
- [5]GINTING A,NOUARI M.Surface integrity of dry machined titanium alloys[J].International Journal of Machine Tools&Manufacture,2009,49:325-332.
- [6]ULUTAN D,OZEL T.Machining induced surface integrity in titanium and nickel alloys:a review[J].International Journal of Machine Tools&Manufacture,2011,51:250-280.
- [7]SU H H,LIU P,FU Y C,et al.Tool life and surface integrity in high-speed milling of titanium alloy TA 15 with PCD/PCBN tools[J].Chinese Journal of Aeronautics,2012,25:784-790.
- [8]沈浩,魏文静,王宝宝.断续车削淬硬钢表面粗糙度的试验与预测[J].机械设计与研究,2014,30(1):78-84.