【摘要】 稀有材料Ti-Al系金属间化合物的本征脆性在一定程度上限制了精密加工技术的选择和在航空航天、国防等领域的应用,为促进此类材料精密加工的适应性及获得高质量的表面,本文对Ti-Al系金属间化合物的精密加工技术进行综述。首先对此类材料的特性及精密加工技术进行总体概括;其次从材料的切削性能(材料去除机理、切削力、切削温度、切屑形态和刀具磨损)对其可加工性进行分析,并对材料加工后的表面完整性(表面粗糙度、表面缺陷、残余应力、加工硬化和金相组织)进行总结;最后,对应用于Ti-Al系金属间化合物所采用的超声振动辅助加工技术进行展望,以期为此类材料的加工提供一定的理论依据和技术支撑。更多还原

【Abstract】 Characteristics of room temperature brittleness for the rare material Ti-Al intermetallic compounds limit the choice of precision machining technology and its application in aerospace and national defense to a certain extent.In order to promote the adaptability of rare alloy materials in precision machining technology and obtain good surface quality,the article reviews the research technology on the precision machining of Ti-Al intermetallic compounds.First,the properties of materials and the overall status of precision machining technology are summarized.Subsequently,the cutting performance(material removal mechanism,cutting force,cutting temperature,chip shape and tool wear) is mainly analyzed.Simultaneously,the surface integrity(surface roughness,surface defects,residual stress,work hardening and microstructure) of the material after processing is summarized.Finally,the ultrasonic vibration-assisted machining technology used in Ti-Al intermetallic compounds is prospected to provide a certain theoretical basis and technical support for the processing of such materials.更多还原