数控高速铣削钛铝合金微观组织与表面质量试验研究  

Experimental Study on CNC High-speed Milling of Microstructureand Surface Quality of Titanium-aluminum Alloys

作　　者：李玉炜 路冬 李亮亮[3] 李鹏飞[4] Li Yuwei;Lu Dong;Li Liangliang;Li Pengfei(Shenzhen Polytechnic University,Shenzhen,Guangdong 518055,China;不详)

机构地区：[1]深圳职业技术大学机电工程学院,广东省深圳市518055 [2]南方科技大学工学院 [3]沈阳飞机工业(集团)有限公司创新研究院 [4]江苏大学机械工程学院

出　　处：《工具技术》2024年第12期50-56,共7页Tool Engineering

基　　金：国家自然科学基金青年项目(52305363);江苏省自然科学基金青年项目(BK20210758);深圳职业技术大学校级重点科研课题(6020310005K)。

摘　　要：对铸造钛铝合金(TiAl)的微观组织、硬度、拉伸性能以及铣削加工过程中的切削参数对切削力和表面粗糙度的影响进行了研究。结果表明,TiAl合金的微观组织主要包含γ-TiAl相和α2-Ti 3Al相,并且表现出高显微维氏硬度,室温下的拉伸性能存在明显的不稳定性,呈现出近脆性断裂特征和较低的延伸率。揭示了铣削加工中切削参数(切削深度和切削宽度)对切削力和表面粗糙度的影响,切削深度和切削宽度的增加会导致切削力和表面粗糙度的增大,表面质量下降。试验中最优表面质量和切削力参数为轴向切削深度5mm,切削宽度1mm,研究结果不仅有助于深入了解铸造钛铝合金的微观结构和性能,而且为未来的研究和工程应用提供参考。This paper investigates the microstructure,hardness,tensile properties of cast titanium-aluminum alloy(TiAl),and the influence of cutting parameters on cutting forces and surface roughness during milling processes.The results reveal that the microstructure of TiAl alloy primarily consists ofγ-TiAl andα2-Ti 3Al phases,exhibiting high micro-Vickers hardness.Tensile properties at room temperature exhibit notable instability,demonstrating characteristics of near-brittle fracture and lower elongation.The study elucidates the impact of cutting parameters(cutting depth and cutting width)on cutting forces and surface roughness.Increased cutting depth and width lead to higher cutting forces and increased surface roughness,consequently reducing surface quality.The optimal parameters for surface quality and cutting forces are found at an axial cutting depth of 5mm and a cutting width of 1mm.These research findings not only enhance our understanding of the microstructure and properties of cast titanium-aluminum alloys but also provide valuable insights for future research and engineering applications.

关 键 词：钛铝合金 微观组织 表面质量 粗糙度 机械性能 

分 类 号：TG65[金属学及工艺—金属切削加工及机床]