高速铣削SiCp/Al复合材料时聚晶金刚石刀具的磨损机理

葛英飞; 徐九华; 傅玉灿

doi:10.3788/OPE.20111912.2907

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高速铣削SiC_p/Al复合材料时聚晶金刚石刀具的磨损机理

微纳技术与精密机械 | 更新时间：2020-08-12

- 高速铣削SiC_p/Al复合材料时聚晶金刚石刀具的磨损机理
- Wear mechanisms of PCD tool in high-speed milling of SiC_p/Al composites
- 光学精密工程 2011年19卷第12期页码：2907-2918
- 作者机构：
  
  1. 南京航空航天大学机电学院,江苏南京,210016
  2. 南京工程学院机械学院,江苏南京,211167
- 作者简介：
- 基金信息：
  
  国家863高技术研究发展计划资助项目(No.2009AA04Z116)();航空科学基金资助项目(No.20090343006)();江苏省高校自然科学基金资助项目(N
- DOI：10.3788/OPE.20111912.2907
  中图分类号： TG506.2;TG113.26
- 收稿日期：2011-03-25，
  
  修回日期：2011-05-26，
  
  网络出版日期：2011-12-25，
  
  纸质出版日期：2011-12-25
- 稿件说明：
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葛英飞, 徐九华, 傅玉灿. 高速铣削SiCp/Al复合材料时聚晶金刚石刀具的磨损机理[J]. 光学精密工程, 2011,19(12): 2907-2918

GE Ying-fei, XU Jiu-hua, FU Yu-can. Wear mechanisms of PCD tool in high-speed milling of SiCp/Al composites[J]. Editorial Office of Optics and Precision Engineering, 2011,19(12): 2907-2918
葛英飞, 徐九华, 傅玉灿. 高速铣削SiCp/Al复合材料时聚晶金刚石刀具的磨损机理[J]. 光学精密工程, 2011,19(12): 2907-2918 DOI： 10.3788/OPE.20111912.2907.

GE Ying-fei, XU Jiu-hua, FU Yu-can. Wear mechanisms of PCD tool in high-speed milling of SiCp/Al composites[J]. Editorial Office of Optics and Precision Engineering, 2011,19(12): 2907-2918 DOI： 10.3788/OPE.20111912.2907.

摘要

采用聚晶金刚石刀具(PCD)

以600~1200 m/min速度对SiC

/2009Al复合材料进行了高速铣削试验

研究了铣削时PCD刀具的磨损机理。使用扫描电镜(SEM)观察加工材料表面和刀具前/后刀面磨损带

X射线衍射仪分析已加工表面物相

并使用能谱(EDS)和激光拉曼谱对后刀面磨损带进行元素分析。结果表明

增强颗粒碳化硅的高频刻划和冲击是导致刀具晶粒脱落、磨粒磨损、崩刃、剥落的主要机制

切削高体积分数增强铝基复合材料、经热处理的复合材料或使用更高的切削速度时

PCD刀具会产生明显微裂纹。另外

增强颗粒体积分数是影响PCD刀具磨损的最显著因素

增强颗粒尺寸、工件材料热处理状态、刀具材料晶粒尺寸和冷却条件对刀具磨损均有显著影响。PCD刀具刀的寿命在70~240 min之间。结论认为

增强颗粒机械冲击、切削振动和热冲击的综合作用是刀具产生微裂纹的主要原因。在高速铣削时的高温、高压下

工件材料中的铝元素和铜元素会向刀具有一定程度的扩散

PCD刀具在铜元素的催化作用下会发生轻微的石墨化磨损。

Abstract

Milling tests for SiC

/2009Al composites were performed by using Polycrystal Diamond(PCD) tools at the cutting speed of 600-1 200 m/min and the mechanisms of tool wear were investigated. A Scanning Electron Microscope (SEM) was used to examine the machined surfaces and tool wear land

an X-ray diffractometer (XRD) was used to analyze the substances on the machined surface and the laser Raman spectra and Energy Density Spectrometry(EDS) were taken to analyze the elements on the tool wear land. The results show that the tool grain breaking-off

abrasive wear

chipping and the peeling caused by the high frequency impact and the scrapt of SiC particles are the prevalent wear patterns. When high volume fraction materials or heat treated materials are milled

or the milling is at a higher cutting speed

micro-cracks will form on the PCD tools. Furthermore

volume fractions

average sizes of SiC particles

tool grain sizes

cooling and heat treating conditions have significant influence on the tool wear. It concludes that the life of PCD tools is in the range of 70-240 min. The micro-cracks are produced on the tool flank under the combined effects of SiC particle impact

cutting vibration and heat impact. Moreover

the aluminum and copper can be diffused into the tool matrix under the very high cutting temperature and cutting forces and the trivial graphitization is taken place on the PCD tools due to the catalysis of copper in the aluminum matrix.

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references

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