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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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

Received: 12 October 2020 Published: 18 January 2021

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	XIE Maoqing
	WANG Leigang

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XIE Maoqing,WANG Leigang. Thermal degradation and judder characteristics of the friction facing for automobile dry clutch enhanced by potassium hexatitanate whisker[J]. Materials Science and Engineering of Powder Metallurgy, 2020, 25(6): 520-526.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2020/V25/I6/520

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