Enhancing Tool Performance in High-Speed End Milling of Ti-6Al-4V Alloy: The Role of AlCrN PVD Coatings and Resistance to Chipping Wear

被引:4
|
作者
He, Qianxi [1 ]
Saciotto, Victor [1 ]
DePaiva, Jose M. [1 ,2 ]
Guimaraes, Monica C. [1 ]
Kohlscheen, Joern [3 ]
Martins, Marcelo M. [4 ]
Veldhuis, Stephen C. [1 ]
机构
[1] McMaster Univ, McMaster Mfg Res Inst, Hamilton, ON L8S 4L8, Canada
[2] Pontificia Univ Catolica Parana, Engn Grad Program PPGEM, BR-80215901 Curitiba, PR, Brazil
[3] Kennametal GmbH, Altweiherstr 27-31, D-91320 Ebermannstadt, Germany
[4] Hylab Green Hydrogen Collaborat Lab, P-7520089 Sines, Portugal
来源
JOURNAL OF MANUFACTURING AND MATERIALS PROCESSING | 2024年 / 8卷 / 02期
基金
加拿大自然科学与工程研究理事会;
关键词
Ti-6Al-4V end milling; AlCrN PVD coating; tool wear mechanism; mechanical property; coating characterization; MECHANICAL-PROPERTIES; CUTTING TOOLS; ALTIN; TIALN;
D O I
10.3390/jmmp8020068
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The conventional cutting tools used for machining titanium alloys normally experience rapid tool wear, and it is generally difficult to achieve a cutting speed over 60 m/min. In this paper, a comprehensive study on improving the machining of Ti-6Al-4V alloy is presented, focusing on high-speed end milling at 100 m/min. Three different AlCrN PVD-coated cemented carbide tools were employed over cemented solid carbide endmills. The study aimed to understand the factors influencing tool performance and, particularly, the uncommon tool wear behavior characterized by chipping on the rake face. The research methodology involves a detailed investigation of coating properties, mechanical characteristics, surface defects, and tool edge geometries. Mechanical properties were measured to assess the resistance to plastic deformation and impact fatigue fracture resistance. Surface defects were meticulously observed, and tool edge geometries were evaluated through optical microscopies. These analyses uncover the key factors contributing to the best tool performance, notably the resistance to plastic deformation (H3/E2 ratio), impact fatigue fracture resistance, and maintaining uniform tool edge geometries. The results of this study reveal that the moderate stress C3 coating outperformed the other two coatings, exhibiting a 1.5-times-longer tool life, a relatively stable cutting force curve, and favorable friction conditions in the cutting zone.
引用
收藏
页数:15
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