Analysis on Turning Ti-6Al-4V with Different Cooling Methods
The aim of this paper is to optimize the machining of Ti-6Al-4V alloy, by studying the chip formation, roughness and tool wear for different cooling conditions. The results were compared between cooling methods,minimal quantity of fluid (MQF) and flooding, and also without fluid for the tool H13A. The turning of Ti-6Al-4V has shown good results on roughness (0,8μm) and tool life, which was 11％ lower with MQF than with the flooding method. The tool wear causes variation of the shear angle, which promotes strength hardening of the chip. As a result, the machined surface could be damaged. The use of the cutting fluid helps to save the cutting edge and could reduce the strength hardening. Nevertheless, it could also facilitate the formation of built-up edge. The nucleation of alpha lamellar colonies can occur due to a combination of deformation rates and temperature,mainly when the flooding is used,but its not conclusive. The lamellar colonies were also found with the MQF in some regions, however, this structure did not show hardness variation compared to equiaxial. For all this reasons, the machining parameters might be carefully chosen.
Titanium (Ti) machining roughness wear
Marcos V. Ribeiro Rafael S. Galdino
Department of Materials and Technology,Univ. Estadual Paulista - UNESP,Guaratinguetá/SP,Zip Code: 12516-410,Brazil
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
1957-1960
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）