Evaluation of the effect of application of cutting fluid at high pressure on tool wear during turning operation of AISI 316 austenitic stainless steel
Evaluation of the effect of application of cutting fluid at high pressure on tool wear during turning operation of AISI 316 austenitic stainless steel
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DOI：
10.1016/j.wear.2013.03.016
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发表时间：
2013-04
期刊：
影响因子：
5
通讯作者：
V.T.G. Naves;M. B. Silva;F. Silva
中科院分区：
文献类型：
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作者：
V.T.G. Naves;M. B. Silva;F. Silva
高压冷却剂在切削过程中的应用可以显著地影响刀具的磨损，从而延长刀具的使用寿命。这是可能的，因为流体更好地渗透到刀具-工件和刀具-切屑接触区域，提供更好的冷却效果，并通过润滑接触区域减少刀具磨损。为了更好地了解对刀具寿命的影响，有必要研究磨损机制，因为这取决于刀具-切屑界面的摩擦/热条件。这项工作的目的是研究在使用涂层硬质合金刀具车削AISI 316奥氏体不锈钢时，在高压和不同浓度的切削液对刀具磨损机制的影响。实验在车削加工中进行，切削液在前刀面施加于切屑和刀具之间的不同压力（10、15和20MPa）。结果与干切削和湿切削进行了比较。采用中温化学气相沉积技术（MTCVD），在ISO K级硬质合金刀具表面涂覆TiN、al2o3和Ti （C，N）。主要发现是使用高压冷却液减少了刀具磨损，减少了刀具与切屑的接触长度。前端面和后端面的主要磨损机制为粘着磨损。在减少刀具磨损方面，高压冷却液技术比顶置液应用和干式切削更有效。当流体浓度为10%，压力为10MPa时，磨损最小。
The application of high-pressure coolant (HPC) in cutting processes can strongly influence the wear on the cutting tools providing a longer tool life. This is possible due to better penetration of the fluid into the tool–workpiece and tool–chip contact region, providing a better cooling effect and decreasing tool wear through lubrication of the contact areas. To better understand the effect on tool life, it is necessary to investigate wear mechanisms, as these depend on the frictional/thermal conditions at the tool–chip interface. The objective of this work is to study how tool wear mechanisms are influenced by cutting fluid applied at high pressure and in different concentrations in the turning operation of AISI 316 austenitic stainless steel using coated cemented carbide tools. The experiments were carried out in a turning operation and the cutting fluid was applied at different pressures (10, 15 and 20MPa) between the chip and tool at the rake face. The results are compared to dry cutting and wet cutting. Cemented carbide tools of class ISO K coated with TiN, Al2O3and Ti (C,N), using the chemical vapor deposition at medium temperature technique (MTCVD), were employed. The main findings were the reduction of tool wear and reduced tool-chip contact length with the use of high-pressure coolant. The main wear mechanism observed on the rake face and the flank face was adhesion. The high-pressure coolant technique was more efficient than both overhead fluid applications and dry cutting with regard to the reduction of cutting tool wear. The lowest wear was obtained when the fluid was applied with a concentration of 10% and at a pressure of 10MPa.