摘要
实验通过调整润滑组元及SiC配比,设计了5种铜基粉末冶金高铁制动闸片配方,并对其物理力学性能和摩擦磨损性能进行了测试分析。研究结果表明,SiC颗粒对Cu基体表面具有强化作用,能显著提升闸片的耐磨性;Cr粉和高碳Cr-Fe粉同时使用可以对材料起到协同强化作用。MoS_(2)和不同形状尺寸石墨搭配使用有效降低了材料磨耗量。当配方中SiC配比为1.5%且润滑组元(片状石墨:颗粒石墨:MoS_(2))比例为9:8:1时闸片表现出优异的高温稳定性、导热散热性和耐磨损性能。当制动速度为350 km/h时,其平均摩擦因数为0.337,摩擦表面最高温度为372℃,磨耗量仅为0.0347 cm^(3)/MJ。完全满足时速350 km及以上高铁制动要求。本研究对相似粉末冶金摩擦材料性能研究开发具有借鉴意义。
In this paper,five kinds of copper-based powder metallurgy brake pads were independently designed,in which the ratio of different shape graphite and SiC content were adjusted,and the physical and mechanical properties,the friction and wear properties of five formula samples were tested and analyzed under the same experimental conditions.The results show that SiC particles have a reinforcing effect on Cu matrix surface,which can significantly improve the wear resistance of brake plate.The simultaneous use of Cr powder and high carbon Cr-Fe powder can strengthen the materials together.When the ratio of SiC is 1.5%and the ratio of lubrication group(sheet graphite:granular graphite:MoS_(2))is 9:8:1,the brake plate shows excellent high temperature stability,thermal conductivity and heat dissipation and wear resistance,When the braking speed is 350 km/h,the average friction coefficient is 0.337,the highest temperature of the friction surface is 372℃,and the wear consumption is only 0.0347 cm^(3)/MJ,which can fully meet the braking requirements of 350 km/h and and above high-speed trains.This study has an important reference significance for the development and application of copper-based powder metallurgy brake pieces.
作者
左鹏军
刘文
周吉峰
丁春华
王云平
刘世锋
ZUO Pengjun;LIU Wen;ZHOU Jifeng;DING Chunhua;WANG Yunping;LIU Shifeng(Shaanxi Huaxia Powder Metallurgy Co.,Ltd.,Xianyang 712000,China;Shaanxi Machinery Research Institute,Xianyang 712000,China;Shaanxi science and technology holding group,Xi’an 710077,China;School of Aerospace Engineering,Xi’an Jiaotong University,Xi’an 710049,China;College of Metallurgical Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China)
出处
《粉末冶金工业》
北大核心
2024年第6期39-44,共6页
Powder Metallurgy Industry
基金
陕西省秦创原“科学家+工程师”队伍建设项目(2023KXJ-217)
关键词
高铁
铜基粉末冶金
制动闸片
摩擦因数
磨耗量
high-speed train
copper-based powder metallurgy
brake pad
friction factor
wear consumption
