Wear Behaviours of Al2O3 Ceramic Tool when Machining Typical Workpiece Materials Based on Thermodynamic Characteristics
Authors
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School of Mechanical Engineering, Guizhou Institute of Technology, Guiyang 550003 ,CN
Fang Shao -
School of Mechanical Engineering, Guizhou Institute of Technology, Guiyang 550003 ,CNJiang Hongwan
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School of Mechanical Engineering, Shandong University, Jinan 250061 ,CNRenwei Wang
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Key Laboratory of Advanced Manufacturing Technology, Ministry of Education, Guizhou university, Guiyang 550025 ,CNChengcheng Niu
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School of Mechanical Engineering, Guizhou University, Guiyang 550025 ,CNFa Zhang
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Center of Analysis and Testing, Guizhou Institute of Technology, Guiyang, 550003 ,CNXiao Lihua
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School of Electrical and Information Engineering, Guizhou Institute of Technology, Guiyang 550003 ,CNKesheng Zhang
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School of Mechanical Engineering, Guizhou Institute of Technology, Guiyang 550003 ,CNAijun Liu
Keywords:
Thermodynamics Characteristics, Al2O3 Ceramic Tool, Wear Behaviour.Abstract
Cutting temperature always highly reaches over to 1000°C during high speed machining with Al2O3 ceramic tools. Diffusion wear is the main wear mechanisms at such high temperature. In this paper, the rules of diffusion wear for Al2O3 ceramic tools are studied based on thermodynamics. Dissolution concentrations in typical normal workpiece materials of ceramic tool material at different temperatures are then calculated. Diffusion reaction rules in high temperature are also analyzed using Gibbs free energy criterion, it is found that the theoretical results are uniform with the experimental data; and the diffusion solubility of Al2O3 ceramic tools is usually much smaller. The order of dissolution of Al2O3 ceramic tools in machining several typical normal workpieces is as follows: titanium> nickel> steel. At the same cutting condition, when machining cast iron and 35# steel, the wear performance of tools is very different and the wear mechanism should be researched more. The results will provide useful references for tool material design and selection.
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