中国机械工程2025，Vol.36Issue(4)：724-731,742,9.DOI:10.3969/j.issn.1004-132X.2025.04.009
C/SiC复合材料激光超声复合加工螺纹缺陷控制及拉伸性能分析
Thread Defects Control and Tensile Property Analysis of C/SiC Composites by L-UHM
摘要
Abstract
C/SiC composites were often used to make high-temperature composite fasteners.H owever,in conventional machining(CM),the integrity of thread features was low,and there were micro-defects such as fiber pull-out and matrix broken on the surfaces,which made it difficult to meet the requirements of a high-performance connection.L-UHM was used to carry out C/SiC composites thread feature machining herein.The variation of micro-defects on the surfaces of thread features and tensile test results in different machining methods were studied.The defects of thread features in CM,LAM(laser-assisted machining)and L-UHM and the relationship between surface micro-defects and tensile properties were revealed.The advantages of L-UHM in C/SiC composites thread feature micro-defects controlling were proved.The results show that compared with CM and LAM,the fiber pull-out,fiber debonding and matrix broken of the teeth tops,teeth sidewalls and teeth bottoms are inhib-ited,the micro defects on the surfaces of thread features are reduced,and thread feature integrity is improved in L-UHM.In addition,in the tensile tests,L-UHM achieves the highest tensile strength,which is increased by 29％compare to CM and by 10％compare to LAM.关键词
C/SiC复合材料/激光超声复合加工/螺纹特征/表面缺陷Key words
C/SiC composite/laser-ultrasonic hybrid machining(L-UHM)/thread feature/sur-face defect分类
金属材料引用本文复制引用
徐浩然,王佳琦,于占江,许金凯..C/SiC复合材料激光超声复合加工螺纹缺陷控制及拉伸性能分析[J].中国机械工程,2025,36(4):724-731,742,9.基金项目
国家重点研发计划(2023YFB4605900) （2023YFB4605900）
中国航空工业-慧眼行动项目(62502010307) （62502010307）
