宇航材料工艺2024，Vol.54Issue(6)：31-37,7.DOI:10.12044/j.issn.1007-2330.2024.06.004
Al-50wt％Si合金钻削孔壁形貌与棱边缺陷实验研究
Experimental Study on Drilling Hole Wall Morphology and Edge Defects of Al-50wt％Si Alloy
摘要
Abstract
During the cutting process of Al-50wt％Si alloy,plastic deformation of aluminum matrix and brittle failure of reinforced silicon particles easily lead to crack,edge collapse,burr and other defects,which is a typical difficult to machine material.In order to solve the problem of poor drilling quality of Al-50wt％Si alloy,this paper adopts single factor experimental method to dry drill Al-50wt％Si alloy,and research on the morphology of hole wall and edge defects.The results show that when the drill feed rate is 0.08 mm/r,the cutting speed increases from 30 m/min to 70 m/min,the axial force increases by 15.8％,and the hole wall surface roughness increases by 19.8％.At lower cutting speeds,the edge appearance at the hole outlet is dominated by particle shedding and burrs.With the increase of cutting speed,the edge appearance at the hole outlet is dominated by matrix ductile fracture,the radial width of edge defect at hole outlet increases;When the drill cutting speed is 50 m/min,the feed rate increases from 0.04 mm/r to 0.12 mm/r,the axial force increases by 74.3％on the whole,and the hole wall surface roughness increases by 50.2％.At lower feed rates increasses,the convex deformation and matrix ductile fracture occur at the outlet side of the hole.As the feed rate,the convex deformation decreases,the radial width of the edge defect at the hole outlet decreases first and then increases,and the minimum radial width is obtained when the feed rate is 0.08 mm/r.关键词
Al-50wt％Si合金/钻削/孔壁质量/棱边形貌Key words
Al-50wt％Si alloy/Drill/Hole wall quality/Edge topography分类
矿业与冶金引用本文复制引用
牛秋林,王星华,张深圳,荆露..Al-50wt％Si合金钻削孔壁形貌与棱边缺陷实验研究[J].宇航材料工艺,2024,54(6):31-37,7.基金项目
国家自然科学基金(52075168) （52075168）
湖南省研究生科研创新项目(CX20221051) （CX20221051）
