六钛酸钾晶须增强汽车干式离合器摩擦片的热衰退和振颤特性

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摘要汽车离合器用摩擦片是影响离合器使用寿命、动力传递效率和舒适性的关键零件,提高其在滑磨过程中摩擦因数稳定性和对振颤的衰减特性是避免传递扭矩不稳定,汽车发生振颤的重要技术手段。本文制备一种六钛酸钾晶须增强离合器摩擦片,研究该类材料的热衰退特性,并进行振颤台架试验。结果表明：添加8%(质量分数)六钛酸钾晶须的汽车离合器摩擦片在400 ℃时摩擦因数大于等于0.2,优于德国大众3101程序热衰退测试标准350 ℃的要求;其在20 000个循环后在500 r/min和800 r/min的平均阻尼因数小于等于0.05 N∙m∙s,满足德国3102程序振颤测试规定标准;在20 000个循环后在500 r/min的最大阻尼因数小于等于0.1 N∙m∙s规定标准,对振颤有明显衰减作用。

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	谢茂青
	王雷刚

关键词 ：离合器, 摩擦片, 六钛酸钾晶须, 热衰退, 振颤

Abstract：Friction facings for automobile clutches are the key parts that affect the service life, power transmission efficiency and comfort of the clutch. Improving the stability of the friction factor and the attenuation characteristics of judder during the sliding process is an important technical mean to avoid the unstable transmission torque and vehicle judder. In this paper, a kind of potassium hexatitanate whisker reinforced clutch friction facing was prepared. The thermal decay characteristics of the modified materials were studied and the judder bench test was carried out. The results show that the addition of 8% (mass fraction) potassium hexatitanate whiskers to enhance the friction coefficient of the automobile clutch friction facing at 400 ℃ is greater than or equal to 0.2, which is better than the requirement of the German Volkswagen 3101 program thermal decay test standard at 350 ℃. Its average damping factor at 500 r/min and 800 r/min after 20 000 cycles is less than or equal to 0.05 N∙m∙s, which meets the German 3102 procedure judder test regulations. After 20 000 cycles, the maximum damping factor of 500 r/min is less than or equal to the specified standard of 0.1 N∙m∙s, which has a significant damping effect on judder.

Key words： clutch friction facing potassium hexatitanate whisker thermal decay judder

收稿日期: 2020-10-12 出版日期: 2021-01-18

ZTFLH:

U456.6

基金资助:国家自然科学基金资助项目(51775249)

通讯作者: 王雷刚,教授,博士,博导。电话：13606646047;E-mail: lgwang@ujs.edu.cn

引用本文:

谢茂青, 王雷刚. 六钛酸钾晶须增强汽车干式离合器摩擦片的热衰退和振颤特性[J]. 粉末冶金材料科学与工程, 2020, 25(6): 520-526.
XIE Maoqing, WANG Leigang. Thermal degradation and judder characteristics of the friction facing for automobile dry clutch enhanced by potassium hexatitanate whisker. Materials Science and Engineering of Powder Metallurgy, 2020, 25(6): 520-526.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2020/V25/I6/520

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