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一种针刺C/C复合材料-40Cr配副的摩擦学性能
吴坤尧1,王妍2,曹凤香1,孙乐1
1.西安航空学院材料工程学院,西安 710077;2.西安建筑科技大学冶金工程学院,西安 710055
摘要:
采用MMUD-10B型摩擦磨损试验机分别在干摩擦和水润滑两种不同环境下,固定转速为100 r/min,在不同载荷下(70、150和230 N)对摩擦配副C/C-40Cr进行摩擦学性能对比分析及表征。利用奥林巴斯GX51金相显微镜观察试样表面的磨痕、采用JJ324BC型的电子天平表征每次实验的磨损量、使用JSM-6510A型扫描电子显微镜(带有EDS能谱仪)观察磨屑的形貌及各元素的原子比。结果表明:在干摩擦中,试样的摩擦因数较大,在0.046~0.070波动,磨损量较少,且摩擦因数与磨损量随着载荷的增加而增加;在水润滑摩擦情况下,摩擦因数变化范围较小,在0.037~0.052,但磨损量较大。干摩擦和水润滑条件下的摩擦因数和磨损量与载荷的大小呈正相关趋势。此外磨屑中稳定存在碳纤维和片层状的40Cr,磨损机制为黏着磨损和磨粒磨损共同作用。
关键词:  针刺C/C复合材料  40Cr  干摩擦  水润滑摩擦
DOI:10.12044/j.issn.1007-2330.2020.04.018
分类号:TH117.1
基金项目:陕西省教育厅2019年度专项科学研究计划(19JK0430)
Tribological Properties of A Kind of Needle Punching C/C Composites-40Cr Pair
WU Kunyao1, WANG Yan2, CAO Fengxiang1, SUN Le1
1.School of Materials Engineering, Xi’an Aeronautical University,Xi’an 710077;2.College of Metallurgical Engineering,Xi’an University of Architecture and Technology,Xi’an 710055
Abstract:
The friction properties of friction pair C/C-40Cr were analyzed and characterized by MMUD-10B friction and wear tester under dry friction and water lubrication conditions with fixed rotation speed of 100 r/min and three different loads(70,150 and 230 N).The wear marks on the surface of the samples were observed by Olympus GX51 metallographic microscope, the wear amount of each experiment was characterized by J324BC electronic balance, and the morphology of wear debris and atomic ratio of each element were observed by JSM-6510A scanning electron microscope (with EDS energy spectrometer).The experimental results show that in dry friction,the friction coefficient fluctuates at 0.046 to 0.070, and the friction coefficient and wear amount increase with the increase of load, while in water lubrication,the variation range of friction coefficient is small from 0.037 to 0.052, but the wear amount is more.Under dry friction and water lubrication, the friction coefficient and wear amount are positively correlated with the load. Carbon fiber and laminated 40Cr structure exist stably in the wear debris.The wear mechanism is adhesive wear and abrasive wear
Key words:  Needle punching C/C composites  40Cr  Dry friction  Water lubrication