热物性参数对Al_2O_3/(W,Ti)C/CaF_2梯度自润滑陶瓷刀具材料残余应力的影响  

Effects of Thermo-physical Parameters on the Residual Stresses of Al_2O_3/(W,Ti) C/CaF_2 Gradient Self-lubricating Ceramic Tool Materials

作　　者：许崇海[1,2] 肖光春[1,2] 张永莲[1,2] 

机构地区：[1]齐鲁工业大学机械与汽车工程学院,济南250353 [2]齐鲁工业大学山东省高校轻工装备先进制造与测控技术重点实验室,济南250353

出　　处：《人工晶体学报》2014年第7期1744-1750,共7页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51075248);山东省自然科学杰出青年基金(JQ201014);教育部科学技术研究重点项目(212097);山东省高等学校科研发展计划项目(J14LB02)

摘　　要：基于功能梯度材料的设计思想,设计并制造了Al2O3/(W,Ti)C/CaF2梯度自润滑陶瓷刀具材料。利用有限元法计算分析了梯度自润滑陶瓷刀具材料层间热膨胀系数差值、分布指数和弹性模量对其残余应力的影响,并给出了径向应力和Von Mises等效应力的分布图,为梯度自润滑陶瓷刀具的研制开发提供了理论基础。以此为基础,采用真空热压工艺制备了Al2O3/(W,Ti)C/CaF2梯度自润滑陶瓷刀具材料。结果表明:据此制备的梯度自润滑陶瓷刀具材料具有良好的力学性能。Al2O3/（W,Ti） C /CaF2self-lubricating ceramic tool material was designed based on the idea of functionally gradient material（FGM）. Effects of the different thermal expansion coefficient,distribution exponent and Young’s modulus of gradient self-lubricating ceramic tools on the residual stress were analyzed by the finite element method. Both the distributions of radial and Von Mises stresses were obtained which provided theoretical basis for the development of gradient self-lubricating ceramic tools.An Al2O3/（W,Ti） C /CaF2 gradient self-lubricating ceramic tool material was fabricated by vacuum hotpressing technique according to the design results. It indicated that the developed gradient self-lubricating ceramic tool material had good mechanical properties.

关 键 词：固体润滑剂 梯度自润滑 陶瓷刀具材料 残余应力 

分 类 号：TQ174[化学工程—陶瓷工业]