文献类型：期刊文献

英文题名：Wear of PCBN tool when cutting materials difficult-to-cut based on thermodynamics entropy

作者：Shao, Fang Wang, Yuting Wang, Yunhai Qun, Cai

第一作者：邵芳

机构：[1] School of Mechanical Engieering, Guizhou Institute of Technology, Guiyang, Guizhou, China; [2] School of Finance Management, Shanghai International Business and Economics University, Shanghai, China

第一机构：贵州理工学院机械工程学院

年份：2015

卷号：7

期号：4

起止页码：381-389

外文期刊名：Metallurgical and Mining Industry

收录：EI(收录号：20152701006367);Scopus(收录号：2-s2.0-84934754737)

语种：英文

外文关键词：Cutting - Diffusion - Free energy - Gibbs free energy - Oxidation - Solubility - Thermodynamics - Tribology - Wear of materials

摘要：Cutting temperature always highly reaches over to 1000°C when high speed machining with PCBN tools. Diffusion of tool material element may have important influence on tool wear at such high temperature., the diffusion wear and oxidation wear have become the major wear mechanism. In this paper, the rules of diffusion wear and oxidation wear for PCBN cutting tools are proposed and analyzed based on thermodynamics theory. Dissolution concentrations in typical normal workpice materials of PCBN tool material at different temperature are then calculated. Diffusion reaction rules in high temperature are developed and analyzed using Gibbs free energy criterion. The machining tests were conducted using the PCBN tools at different cutting speeds of 50, 95,100 and 180 m/min, feed of 0.1, 0.2 and depth of cut of 0.1, 0.8, 1, and 1.5 mm respectively on PUMA300LM numerically-controlled lathe. It was found that the theoretical results were uniform with the experimental data; the results will provide useful references for tool material design and selection. ? Metallurgical and Mining Industry, 2015.