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Materials 2016, 9(10), 804; doi:10.3390/ma9100804

Analysis of Minimum Quantity Lubrication (MQL) for Different Coating Tools during Turning of TC11 Titanium Alloy

1
Department of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2
Shanghai Aerospace Precision Machinery Research Institute, Shanghai 200240, China
*
Author to whom correspondence should be addressed.
Academic Editor: Federico Bella
Received: 6 July 2016 / Revised: 12 September 2016 / Accepted: 12 September 2016 / Published: 28 September 2016
(This article belongs to the Section Manufacturing Processes and Systems)
View Full-Text   |   Download PDF [12469 KB, uploaded 28 September 2016]   |  

Abstract

The tool coating and cooling strategy are two key factors when machining difficult-to-cut materials such as titanium alloy. In this paper, diamond coating was deposited on a commercial carbide insert as an attempt to increase the machinability of TC11 alloy during the turning process. An uncoated carbide insert and a commercial Al2O3/TiAlN-coated tool were also tested as a comparison. Furthermore, MQL was applied to improve the cutting condition. Cutting performances were analyzed by cutting force, cutting temperate and surface roughness measurements. Tool wears and tool lives were evaluated to find a good matchup between the tool coating and cooling strategy. According to the results, using MQL can slightly reduce the cutting force. By applying MQL, cutting temperatures and tool wears were reduced by a great amount. Besides, MQL can affect the tool wear mechanism and tool failure modes. The tool life of an Al2O3/TiAlN-coated tool can be prolonged by 88.4% under the MQL condition. Diamond-coated tools can obtain a good surface finish when cutting parameters and lubrication strategies are properly chosen. View Full-Text
Keywords: TC11 aluminum alloy; turning; minimum quantity lubrication (MQL); tool coating; tool wear TC11 aluminum alloy; turning; minimum quantity lubrication (MQL); tool coating; tool wear
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MDPI and ACS Style

Qin, S.; Li, Z.; Guo, G.; An, Q.; Chen, M.; Ming, W. Analysis of Minimum Quantity Lubrication (MQL) for Different Coating Tools during Turning of TC11 Titanium Alloy. Materials 2016, 9, 804.

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