碳化硅陶瓷摩擦磨损性能及摩擦过程中接触应力分析

Analysis on Tribological Properties and Contact Stress during Friction Process of SiC Ceramic Materials

采用MMW-1A多功能立式摩擦磨损试验机,以全因子设计的方法研究干摩擦条件下,载荷和转速两因素对摩擦因数与磨损量的影响。摩擦因数与磨损量的方差分析结果表明,转速对摩擦因数的影响更为显著,而载荷对Si C磨损量的影响更为显著。结合ABAQUS有限元分析软件对Si C陶瓷与45#钢的摩擦过程进行模拟仿真,得到摩擦过程中接触区域的应力分布,同时还探讨Si C陶瓷的磨损机制。结果表明:Si C陶瓷表面的最大等效应力位于接触区边缘,最大拉应力位于滑动前方,最大压应力位于滑动后方;不同应力下Si C陶瓷表面的磨损机制也不一样,主要表现为黏着磨损、磨粒磨损、犁沟磨损。

The effect of load and speed on friction coefficient and wear loss under dry friction condition was researched on the MMW-1A muhifunction vertical friction and wear testing machine with full-factorial design method.The variance a- nalysis of friction coefficient and wear loss Show that the speed has the most important impact on the friction coefficient, while the load has the most important impact on the wear loss.The friction and wear process of SiC ceramic against 45 steel was simulated by using ABAQUS software to analyze the stress distribution of contact area during friction and wear process, and the wear mechanism of SiC ceramic was discussed.The test results show that the maximum Mises stress of SiC ceramic is located at the outside of contact area, and the maximum tensile stress is located at the anterior of sliding, while the maximum compressive stress is located at the rear of sliding. Under different stress, the wear mechanisms of SiC ceramic are different, which are mainly adhesive wear, abrasive wear and ploughing wear.