摘要
陶瓷刀具切削高硬钢时,刀具和工件之间的元素扩散将加剧刀具前刀面的磨损。采用双因素均匀试验法通过EDS(能谱仪)分析Al2O3基TiC增韧复合陶瓷刀具与1Cr17Ni7不锈钢中Ti和Fe的扩散结果,利用二次回归找出了温度与高温持续时间双因素对扩散的影响函数方程。方程指出温度对扩散的影响比时间更显著。不同温度所需的扩散激发时间不同,900℃时只需69 min。同时使用显微硬度仪对扩散与刀具和工件显微硬度的影响进行了研究。扩散副交接面处Al2O3基TiC增韧复合陶瓷硬度降低了1/2。
During high-speed machining of high-hard steel with a ceramic cutting tool, the chemical diffusion between the cutting tool and the workpiece material usually accelerates the crater wear,on the rake surface of the cutting tool. This paper uses an energy dispersion spectroscopy to study the diffusion of Ti and Fe between Al2O3-TIC ceramic cutting tool and 1Cr17Ni7 Austenite stainless steel. The study shows that there is a greater influence of temperature on diffusion than on soaking time. The diffusion of Ti and Fe elements needs different lengths of activation time at different temperatures. For example, at the temperature of 900℃, the activation time is only 69 minutes. The paper also studies the hardness at the interface of the diffusion couple.
出处
《机械科学与技术》
CSCD
北大核心
2011年第12期2061-2066,共6页
Mechanical Science and Technology for Aerospace Engineering
基金
芙蓉学者基金项目
湖南省教育厅资助科研项目(10C1259)资助
