环保型NAO刹车片的摩擦磨损行为和力学性能  

Friction and wear behaviors and mechanical properties ofeco-friendly NAO brake pads

作　　者：花能斌 耿德虎 王劲扬 HUA Nengbin;GENG Dehu;WANG Jinyang(School of Materials Science and Engineering,Fujian University of Technology,Fuzhou 350118,China)

机构地区：[1]福建工程学院材料科学与工程学院,福建福州350118

出　　处：《福建工程学院学报》2023年第3期230-236,共7页Journal of Fujian University of Technology

基　　金：福建省科技计划项目(2022L3062)。

摘　　要：采用成本低廉的纺织废料纤维作为组成原料制备环保型无石棉有机物(NAO)刹车片,研究了不同纺织废料纤维含量对刹车片的结构与摩擦磨损性能的影响。结果表明:纺织边角料复合NAO刹车片结构均匀致密,主要含有SiO_(2)、CaCO_(3)、BaSO_(4)3种晶相。在钢球作为摩擦对偶件往复摩擦条件下,随着w纺织纤维从0增加到6%,刹车片的摩擦系数从0.52降低到0.33,磨损速率从0.787 mm 3·m^(-1)·kN^(-1)降低到0.233 mm 3·m^(-1)·kN^(-1),耐磨性提高,磨损机制主要是疲劳磨损;刹车片的硬度从34 HR增加到57 HR,抗弯强度从21.85 MPa增加到51.76 MPa,从纺织纤维复合NAO刹车片断口中可以看出,韧性纺织纤维的加入改善了刹车片各组分界面结合,提高了强度,从而表现出更优异的耐磨性能。Eco-friendly non-asbestos-organic(NAO)brake pads were prepared by using low-cost textile waste fibers as raw materials.The effects of the content of textile waste fiber on the structure,friction-and wear properties of brake pads were studied.Results show that the textile waste composite NAO brake pads exhibit an uniform and compact structure,mainly containing SiO_(2),CaCO_(3) and BaSO_(4) crystalline phases.Under the reciprocating friction condition using steel ball as friction couple pair,as the textile fiber mass fraction w increases from 0 to 6%,the friction coefficient of brake pads decreases from 0.52 to 0.33,the wear rate decreases from 0.787 mm 3·m^(-1)·kN^(-1) to 0.233 mm 3·m^(-1)·kN^(-1),and the wear resistance increases.The main wear mechanism is fatigue wear.Meanwhile,the hardness of brake pads increases from 34 HR to 57 HR,and the flexural strength increases from 21.85 MPa to 51.76 MPa.It can be seen from the fracture morphology of textile fiber composite NAO brake pads that the addition of ductile textile fiber improves the interfacial bonding of each component of brake pads,improves the strength,and thus shows superior wear resistance.

关 键 词：无石棉有机刹车片 摩擦行为 纺织纤维 磨损机理 力学性能 

分 类 号：TH117.1[机械工程—机械设计及理论]