暴露于高温时摩擦材料的膨胀,增长和尺寸稳定性

[中文适用范围]： 该性能标准规定了测量摩擦材料尺寸变化以确定温度影响的通用方法。该测试适用于汽车和商用车液压和空气制动系统中常用的盘式和鼓式衬片。本标准描述了两个主要测试程序。方法 A，其中摩擦材料与加热表面接触，以模拟实际使用过程中发生的摩擦垫热输入。方法 B 使用烤箱加热独立式材料，是需要较少仪器的近似程序。盘式刹车片推荐方法A [外文原描述]： This document specifies a universal method of measuring the thickness change of friction materials to determine the effects of temperature. The test applies to both disc and drum-type linings commonly used in hydraulic and air brake systems for automotive or commercial vehicle applications.This document describes several methods for thermal swell and growth. Method A is where the friction material is in contact with a heated surface to simulate the heat input to the pad that occurs during actual usage. Method B uses an oven to heat the freestanding material and is an approximate procedure requiring less instrumentation. Method A is recommended for disc brake pad assemblies, noise insulators, or flat coupons, while Method B is recommended for curved drum brake linings.This document also describes how to test the warmed-up disc brake pads and noise insulators for hot compressibility using Method A.