制动速度对铜基粉末冶金闸片材料摩擦学性能的影响  

Effect of braking speed on friction property of copper-based powder metallurgy brake materials

作　　者：王毅[1] 刘铁军[1] 朱军[2] 马强[2] WANG Yi LIU Tiejun ZHU Jun MA Qiang(Zhengzhou University of Aeronautics, Zhengzhou 450046, China School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi＇an 710129, China)

机构地区：[1]郑州航空工业管理学院,郑州450046 [2]西北工业大学力学与土木建筑学院,西安710129

出　　处：《粉末冶金材料科学与工程》2017年第3期366-371,共6页Materials Science and Engineering of Powder Metallurgy

基　　金：航空科学基金资助项目(2010ZF56016);河南省基础与前沿基金资助项目(072300440080;11230041003;152300410125);河南省重点科技攻关项目(082102210016;152102210348;162102210089)

摘　　要：以Sn+SiO_2+Al_2O_3+CaF_2作为摩擦组元,石墨+Pb作为润滑组元,制备铜基粉末冶金列车闸片材料,在MM-1000Ⅱ型摩擦试验机上进行摩擦试验,测定制动速度在120~200 km/h范围内材料的摩擦因数、磨损量与表面温度,并观察摩擦表面形貌,研究制动速度对该材料摩擦学性能的影响。结果表明:在制动速度<180 km/h时,随制动速度增加,闸片材料的摩擦因数在0.41~0.46之间波动,但制动速度达到200 km/h时,摩擦因数显著减小至0.32,摩擦因数稳定性总体较好。材料的磨损量随制动速度增大而增加,但在制动速度达到180 km/h时磨损量趋于稳定,为119 mg。低速制动下材料的磨损机理主要为疲劳磨损,高速制动时主要为磨粒磨损和氧化磨损。The copper-based powder metallurgy train brake material was fabricated using Sn＋SiO2＋Al2O3＋CaF2 as the friction component and the graphite＋Pb as the lubrication component. The friction test was carried out on a MM-1000 II friction tester. The friction coefficient, wear mass and surface temperature of the material with the speed braking in the range of 120-200 km/h were measured. The friction surface morphology was observed. The effect of braking speed on the friction property of the copper-based powder metallurgy material was also studied. The results show that the friction coefficient of the pad material fluctuates between 0.41-0.46 with the braking speed increasing from 120 to 180 km/h. But when the braking speed exceeds 180 km/h, the friction coefficient decreases to 0.32 and the friction coefficient is stable and overall good. The wear amount of the material increases with increasing braking speed, and the wear amount reaches 119 mg when the braking speed reaches 180 km/h and tends to be stable. The wear mechanisms of the materials are mainly fatigue wear under low speed braking and abrasive wear and oxidation wear under high speed braking.

关 键 词：铜基闸片材料 粉末冶金 制动速度 摩擦 磨损 显微组织 

分 类 号：TH117.22[机械工程—机械设计及理论]