磨损形态及其切削耐用度
(1. 沈阳大学 材料科学与工程系, 沈阳 110044;
2. 中国科学院 金属研究所 沈阳材料科学国家(联合)实验室,沈阳 110016;
3. 东北大学 冶金与材料学院, 沈阳 110004；
4. 沈阳理工大学 材料工程学院，沈阳 110168)
摘 要: 研究了Al2O3和Al2O3/ZrO2(Y2O3) 复合刀具材料的Weibull分布、磨损形态及其切削耐用度。用一元线性回归方法确定Al2O3/ZrO2(Y2O3)刀具的耐用度参数，分析切削条件对Al2O3/ZrO2(Y2O3) 复合刀具材料寿命的影响。结果表明：Al2O3和含2%(摩尔分数)及3%Y2O3的ZrO2/Al2O3(Al2O3/ZrO2(2Y)及Al2O3/ZrO2(3Y))复合刀具材料Weibull模数的m值分别是5.6、10.2和11.7, 说明Al2O3/ZrO2(3Y)陶瓷的可靠性最优；Al2O3/ZrO2(3Y)复合刀具切削40CrMoNiA合金钢的磨损形态主要来自磨粒磨损和粘结磨损，耐用度参数vc、f、ap的指数值分别为1.3、1.69和0.66, 陶瓷刀具更适合高速切削，最大影响因素是进给量(f)，在最佳切削条件下(vc＝140 m/min, ap=0.5 mm和f=0.3 mm/r)切削耐用度为3 h。
关键字: Al2O3/ZrO2(Y2O3)复合材料；刀具；可靠性；磨损形态；一元线性回归；耐用度
lifetime of Al2O3/ZrO2(Y2O3) composites
（1. Department of Materials Science and Engineering, Shenyang University,Shenyang 110044, China;
2. Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016, China;
3. Institute of Metallurgy and Materials, Northeastern University,Shenyang 110004, China;
4. School of Materials and Engineering, Shenyang Ligong University,Shenyang 110168, China）
Abstract:The Weibull distribution, abrasion performance and cutting lifetime of Al2O3 of Al2O3/ZrO2(Y2O3) composites were investigated. The cutting lifetime of Al2O3/ZrO2(Y2O3) cutting tool was established using single linearity regression. The effects of different cutting conditions on the cutting lifetime of Al2O3/ZrO2( Y2O3) composite cutting tool were completely analyzed. The results show that Weibull modula (m) of Al2O3, Al2O3/ZrO2(2Y) and Al2O3/ ZrO2(3Y) composites are 5.6, 10.2 and 11.7 respectively, showing that the Al2O3/ZrO2(3Y) composite has the best reliability. The abrasion mechanism during cutting process of 40CrMoNiA alloy steel by Al2O3/ZrO2( Y2O3) cutting tool results from grain abrasion and adhesion abrasion. The parameters in the endurance model, vc, f and a p are 1.3, 1.69 and 0.66, respectively. The cutting tool material investigated at present is suitable for high-speed cutting. The maximal influence factor is the amount of feed (f). Under the optimum cutting conditions, vc＝140 m/min, ap=0.5 mm and f=0.3 mm/r, the endurance life of the composite cutting tool is 3 h.
Key words: Al2O3/ZrO2(Y2O3) composite; cutting tool; reliability; abrasion modality; single linearity regression; cutting lifetime
