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;
Email:
DOI: 10.14024/j.cnki.1004-244x.20170907.004
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