Thermal fatigue and wear of compacted graphite iron brake discs with various thermomechanical properties
作者机构：School of Nuclear Equipment and Nuclear EngineeringYantai UniversityYantai 264005ShandongChina School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Key Laboratory for Advanced Materials Processing TechnologyMinistry of EducationBeijing 100084China
出 版 物：《China Foundry》 (中国铸造（英文版）)
年 卷 期：2024年第21卷第3期
页 面：248-256页
核心收录：
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：supported by the Science and Technology Innovation Development Project of Yantai(No.2023ZDX016)
主 题：compacted graphite iron brake disc thermomechanical properties thermal fatigue wear
摘 要：The increase in payload capacity of trucks has heightened the demand for cost-effective yet high performance brake *** this work,the thermal fatigue and wear of compacted graphite iron brake discs were investigated,aiming to provide an experimental foundation for achieving a balance between their thermal and mechanical *** graphite iron brake discs with different tensile strengths,macrohardnesses,specific heat capacities and thermal diffusion coefficients were produced by changing the proportion and strength of *** peak temperature,pressure load and friction coefficient of compacted graphite iron brake discs were analyzed through inertia friction *** morphology of thermal cracks and 3D profiles of the worn surfaces were also *** is found that the thermal fatigue of compacted graphite iron discs is determined by their thermal properties.A compacted graphite iron with the highest specific heat capacity and thermal diffusion coefficient exhibits optimal thermal fatigue *** of the matrix at low temperatures significantly weakens the function of alloy strengthening in hindering the propagation of thermal *** the reduced hardness,increasing the ferrite proportion can mitigate wear loss resulting from low disc temperatures and the absence of abrasive wear.
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