盘铣开槽加工表面形貌与变质层研究（英文）

发布时间：2018-01-05 01:16

本文关键词：盘铣开槽加工表面形貌与变质层研究（英文）　出处：《稀有金属材料与工程》2016年12期 　论文类型：期刊论文

【摘要】：设计盘铣开槽实验以测量盘铣切削钛合金时的切削力和切削温度,以切削力和切削温度实验为基础,分析不同切削条件下的表面粗糙度、表面形貌、残余应力、显微组织和显微硬度。结果表明:铣削表面中心处的粗糙度值小于边缘处,粗糙度值随着主轴转速的增加而减小,随着切削深度和进给速度的增加而增大。铣削表面和次表面均出现残余压应力,随着深度的增加,残余压应力逐渐减小为零。在切削力的作用下,晶粒沿进给方向发生明显的拉伸变形,α相从初始等轴态拉伸为长片状。随着切削温度的升高,塑性变形区的金相组织发生改变,当切削温度达到β相转变温度时,金相组织从初始等轴态转变为全片层组织。热力耦合作用使得已加工表面和次表面硬度值升高。
[Abstract]:The design of disc milling cutting force experiment to measure the slotted plate milling cutting of titanium alloys and the cutting temperature, cutting force and cutting temperature experiments, analysis of surface roughness under different cutting conditions, surface topography, residual stress, microstructure and hardness. The results show that the center of the milling surface roughness value less than the edge roughness value decreases with the increase of spindle speed, increases with the increase of cutting depth and feed rate. The milling surface and sub surface showed residual compressive stress, with the increase of depth, the residual compressive stress decreases gradually to zero. In the cutting force, the grain along the feed direction obviously the tensile deformation phase from the initial tensile axial state of flake. With the increase of cutting temperature, the change of microstructure of plastic deformation zone, when the cutting temperature reaches the beta phase transition temperature, microstructure from the initial Equiaxed state into lamellar microstructure. The coupling of the machined surface and sub surface hardness increased.

【作者单位】：西北工业大学现代设计与集成制造技术教育部重点实验室;
【基金】：National Numerical Control Major Projects Foundation of China(2013ZX04001081) National Natural Science Foundation of China(50975237,51005184) Aerospace Research Foundation of China(2013ZE53060)
【分类号】：TG54
【正文快照】： The titanium alloy is widely used in aerospace,aviation,navigation,automobile and other industries because of its advantages like small density,high intensity,high temperature resistance and good corrosion resistance[1].However,the machining quality and

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