CAJ | 학술논문

利用ANSYS有限元分析软件对5种Al_2O_3基陶瓷材料(纯Al_2O_3、Al_2O_3/TiC、Al_2O_3/(W,Ti)C、Al_2O_3/Ti(C,N)和Al_2O_3/SiCw)在MRH-3环块磨损试验机上与硬质合金摩擦进行模拟仿真,得到摩擦磨损过程中的应力及分布,并与室温下的磨损实验结果相比较,同时还探讨了不同添加剂的Al_2O_3基陶瓷的磨损机理.结果表明:不同成分的Al_2O_3基陶瓷材料在摩擦磨损过程中最大主应力位于摩擦副接触区中心,最大剪应力位于摩擦副接触区边缘;载荷对主应力和剪应力大小的影响比转速的影响大;在相同的摩擦条件下,受到合应力越大的陶瓷其磨损率越大;合应力越大的陶瓷磨损后陶瓷表面越容易产生微裂纹.5种Al_2O_3基陶瓷磨损率的大小为:Al_2O_3>Al_2O_3/(W,Ti)C>Al_2O_3/Ti(C,N)>Al_2O_3/TiC>Al_2O_3/SiCw.
이용ANSYS유한원분석연건대5충Al_2O_3기도자재료(순Al_2O_3、Al_2O_3/TiC、Al_2O_3/(W,Ti)C、Al_2O_3/Ti(C,N)화Al_2O_3/SiCw)재MRH-3배괴마손시험궤상여경질합금마찰진행모의방진,득도마찰마손과정중적응력급분포,병여실온하적마손실험결과상비교,동시환탐토료불동첨가제적Al_2O_3기도자적마손궤리.결과표명:불동성분적Al_2O_3기도자재료재마찰마손과정중최대주응력위우마찰부접촉구중심,최대전응력위우마찰부접촉구변연;재하대주응력화전응력대소적영향비전속적영향대;재상동적마찰조건하,수도합응력월대적도자기마손솔월대;합응력월대적도자마손후도자표면월용역산생미렬문.5충Al_2O_3기도자마손솔적대소위:Al_2O_3>Al_2O_3/(W,Ti)C>Al_2O_3/Ti(C,N)>Al_2O_3/TiC>Al_2O_3/SiCw.
The process of dry friction and wear test of Al_2O_3-based ceramic against cemented carbide (YG8) at room temperature with a MRH-3 high-speed ring-block tribometer was simulated by using ANSYS software. The research materials were Al_2O_3, Al_2O_3/TiC, Al_2O_3/(W,Ti)C, Al_2O_3/Ti(C,N) and Al_2O_3/SiCw. The stress distribution of Al_2O_3-based ceramic materials against YG8 during wear processes was obtained,and was compared with the experiment results at room temperature. The wear mechanism of ceramics with different additives was discussed. Test results show that the maximum of main stress is located at the center of sliding couple, while the maximum of shear stress at the outside of sliding couple. The value of the stress increases with the increase of applied load, and the sliding speed just has little effect on the stresses. Under the same working condition, if the stress during wear process is large enough, micro-crack will appear on the surface of ceramic. The collating sequence of wear rate of these five ceramic materials is Al_2O_3>Al_2O_3/(W,Ti)C>Al_2O_3/Ti(C,N)>Al_2O_3/TiC> Al_2O_3/SiCw.