高速车削钛合金的硬质合金刀具磨损机理研究

使用硬质合金刀具材料进行钛合金(Ti-6Al-4V)的高速干车削试验.采用电子扫描显微镜(SEM)观察刀具的磨损形貌,通过能谱分析(EDS)分析磨损表面的元素分布,并对刀具的主要磨损机理进行了分析.研究结果表明,使用硬质合金刀具材料高速干车削Ti-6Al-4V时,刀具的磨损机理主要为粘结磨损、氧化磨损和扩散磨损.硬质合金刀具的氧化磨损主要发生在刀具前刀具和后刀面的磨损边缘区.由于车削过程中刀具前刀面的切削温度比后刀面的切削温度高,导致刀具前刀面的氧化磨损、粘结磨损和扩散磨损较后刀面严重.

Wear Mechanism of Cemented Carbide Tool in High Speed Machining Titanium Alloy (Ti-6Al-4V)

Cemented carbide tool was used to turn titanium alloys(Ti-6Al-4V) at high-speed under dry cutting condition.Wear images of cutting tool was observed by SEM,and element distribution of tool surface was analyzed by EDS.Adhesive wear,oxidation wear and diffusion wear were the main wear mechanisms of the cemented carbide tool.Oxidation wear appeared at the wear edge of rake face and flank face of cutting tool.During turning,the cutting temperature of rake face was higher than that of flank face,so adhesive wear...