磨損形態(tài)及其切削耐用度
(1. 沈陽大學 材料科學與工程系, 沈陽 110044;
2. 中國科學院 金屬研究所 沈陽材料科學國家(聯(lián)合)實驗室,沈陽 110016;
3. 東北大學 冶金與材料學院, 沈陽 110004；
4. 沈陽理工大學 材料工程學院，沈陽 110168)
摘 要: 研究了Al2O3和Al2O3/ZrO2(Y2O3) 復合刀具材料的Weibull分布、磨損形態(tài)及其切削耐用度。用一元線性回歸方法確定Al2O3/ZrO2(Y2O3)刀具的耐用度參數(shù)，分析切削條件對Al2O3/ZrO2(Y2O3) 復合刀具材料壽命的影響。結(jié)果表明：Al2O3和含2%(摩爾分數(shù))及3%Y2O3的ZrO2/Al2O3(Al2O3/ZrO2(2Y)及Al2O3/ZrO2(3Y))復合刀具材料Weibull模數(shù)的m值分別是5.6、10.2和11.7, 說明Al2O3/ZrO2(3Y)陶瓷的可靠性最優(yōu)；Al2O3/ZrO2(3Y)復合刀具切削40CrMoNiA合金鋼的磨損形態(tài)主要來自磨粒磨損和粘結(jié)磨損，耐用度參數(shù)vc、f、ap的指數(shù)值分別為1.3、1.69和0.66, 陶瓷刀具更適合高速切削，最大影響因素是進給量(f)，在最佳切削條件下(vc＝140 m/min, ap=0.5 mm和f=0.3 mm/r)切削耐用度為3 h。
關(guān)鍵字: Al2O3/ZrO2(Y2O3)復合材料；刀具；可靠性；磨損形態(tài)；一元線性回歸；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
