激光淬火对制动盘摩擦振动噪声影响的实验研究  

An Experimental Study on Influence of Laser Quenching on the Frictional Vibration and Noise of Brake Disc

作　　者：王书文[1] 赵德玉 严晟凯 张欢 Wang Shuwen;Zhao Deyu;Yan Shengkai;Zhang Huan(College of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093)

机构地区：[1]上海理工大学机械工程学院,上海200093

出　　处：《汽车工程》2020年第12期1688-1694,共7页Automotive Engineering

基　　金：国家自然科学基金(51275126);上海市科委项目(18060502400)资助。

摘　　要：制动摩擦振动与噪声的产生机理和控制技术是学术界和工程技术人员多年来一直在努力解决的世界性难题。本文中采用激光表面淬火技术对4个铸铁制动盘的摩擦表面进行激光改性处理,实验研究了激光淬火功率对制动盘残余应力、阻尼系数、摩擦因数以及摩擦振动和噪声的影响。实验结果表明,激光淬火后制动盘的表面残余应力由拉应力变为压应力;阻尼系数随着淬火功率的增大而增大;摩擦因数随着淬火功率的增大有所降低但更趋稳定,有效地减小了制动摩擦振动和噪声的产生,尤其对制动卡钳的减振效果明显,在实验范围内将制动卡钳的振动加速度均方根值最大降低到原盘的30%。本研究对制动摩擦振动噪声的控制、减少制动磨损进而改善环境都具有重要意义。The generation mechanism and control technology of braking vibration and noise is a worldwide problem that the academia circle and engineers have been trying to solve for many years.In this study,laser surface quenching technique is employed to modify the frictional surfaces of four cast iron brake discs.The effects of laser quenching power on residual stress,damping coefficient,friction coefficient and braking vibrations and noise of brak discs are experimentally studied.The experiemntal results show that after laser quenching,the surface residual stress of the brake discs changes from tensile stress to compressive stress;the damping coefficient of brake discs increases with the increase of laser quenching power;the friction coefficient decreases with the increase of laser quenching power but becomes more stable,which effectively reduces braking fritional vibrations and noise.Particularly,the braking vibration of caliper reduces significantly,with a maximum reduction of RMS of the braking caliper to 30%of the original disc within the experimental range.This study is of great significance to the control of braking frictional vibrations and noise,reduction of brake wear,and improvement of the environment.

关 键 词：制动盘 激光淬火 残余应力 摩擦振动噪声 

分 类 号：TG1[金属学及工艺—金属学]