Abstract

A Cu-free brake friction material was produced with three surface scorching conditions, and the brake performance was compared using maps of the friction coefficient, maximum disc temperature, and deceleration. The tests were carried out using a subscale dynamometer to avoid any influence of hardware on the obtained brake data. The friction coefficient decreased with velocity and contact pressure and as the intensity of the scorching treatment increased. As a consequence, the material with intermediate scorching showed the most stable coefficient of friction throughout the different brake conditions (10–80 bar; 40–200 km/h). The brake decelerations were found to strongly increase with pressure and, depending on the scorching condition, to slightly decrease when the velocity was increased. The specific wear rates were evaluated for specific brake sections and were found to be dependent on the scorching treatment, which must be properly designed to optimize the brake performance of the tribological system.

摘要

在三种表面烧焦条件下生产了无铜制动摩擦材料，并使用摩擦系数，最高碟盘温度和减速度的曲线图比较了制动性能。为了避免硬件对获得的制动数据产生任何影响，使用了小规模的测功机进行了测试。摩擦系数随着速度和接触压力的增加而降低，并且随着焦化处理强度的增加而降低。结果，在不同制动条件下（10–80 bar； 40–200 km / h），具有中度焦化的材料显示出最稳定的摩擦系数。发现制动减速度随着压力的增加而大大增加，并且根据焦化条件，当速度增加时，制动减速度会略有减少。