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中南大学学报(自然科学版)

Journal of Central South University

第49卷    第5期    总第285期    2018年5月

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文章编号:1672-7207(2018)05-1087-08
中重型车辆离合器摩擦副材料的高温摩擦磨损性能
屈盛官1,袁志敏1,赖福强1,李小强1,付志强2

(1. 华南理工大学 机械与汽车工程学院,广东 广州,510640; 2. 中国地质大学 工程技术学院,北京,100083)

摘 要: 为了探讨离合器摩擦副材料在高温下的摩擦磨损机制,采用30CrSiMoVM钢作为与铜基粉末冶金摩擦片配对使用的对偶钢片,在MMU-10G高温端面摩擦磨损试验机上,研究30CrSiMoVM钢和摩擦片组成的摩擦副在室温到600 ℃之间的摩擦磨损性能。研究结果表明:随着温度升高,材料的强度逐渐降低,摩擦界面氧化膜不断形成与脱落,使摩擦副摩擦因数和磨损量总体趋势逐渐增大。在温度为300~500 ℃时,摩擦副摩擦因数和磨损量均平稳增大,表明摩擦副材料在此温度段摩擦磨损性能较稳定,磨损机制表现为磨粒磨损、氧化磨损和疲劳磨损;在600 ℃时,摩擦副材料表层软化,摩擦片摩擦因数和磨损量急剧增大,对偶钢片因表层黏着磨损严重,相对磨损量较小,磨损机制表现为黏着磨损、氧化磨损和疲劳磨损。

 

关键词: 30CrSiMoVM钢;铜基粉末冶金;高温;摩擦磨损性能

Friction and wear properties for clutch friction materials in medium-heavy-duty vehicle at high temperature
QU Shengguan1, YUAN Zhimin1, LAI Fuqiang1, LI Xiaoqiang1, FU Zhiqiang2

1. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China; 2. School of Engineering and Technology, China University of Geosciences, Beijing 100083, China

Abstract:In order to study the friction and wear mechanisms of the clutch friction pair at high temperature, 30CrSiMoVM steel was selected as the dual-steel-disk pairing with the copper based powder metallurgy frictional material, and its friction and wear properties were investigated at the temperatures from room temperature to 600 ℃, through a high temperature wear tester (MMU-10G type). The results show that with the increase of temperature, the strength of friction pair materials decrease gradually and the oxide film coatings are constantly formed and peeled on the contact surface, leading to a gradual increase at the friction coefficient and wear loss of the friction pair. At 300-500 ℃, the friction coefficient and wear loss of the friction pair increase steadily, indicating that the friction and wear properties are stable, and the predominant wear mechanisms are abrasive wear, oxidative wear and fatigue wear. At 600 ℃, the material surface is softened, resulting in a rapid increase at the friction coefficient of friction pair and wear loss of the frictional material. Severe adhesive wears occur on the dual-steel-disk surface, but its relative wear loss remains low, and the dominant wear mechanisms are adhesive wear, oxidative wear and fatigue wear.

 

Key words: 30CrSiMoVM steel; copper based powder metallurgy; high temperature; friction and wear properties

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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