摘要
以Fe、Cu、石墨粉为主要原料,MoS_(2)粉末为固体润滑剂,硬脂酸锌为成形润滑剂,制备成形混合料,经压制、烧结制得Fe-15Cu-0.8C铁基减摩材料。对烧结体试样的密度、显微组织、硬度和摩擦磨损性能等进行测试分析。结果表明:烧结体试样的密度随MoS_(2)含量的增加有所降低,硬度先增加后趋于稳定,成分为Fe-15Cu-0.8C-3MoS_(2)烧结体试样的硬度可达70HRB。试样的微观组织主要由珠光体、Cu和MoS_(2)组成。MoS_(2)在烧结时会部分分解,但随着MoS_(2)加入量增加,烧结体试样中残留MoS_(2)含量增加。在一定范围内,浸油处理后试样的摩擦系数也随MoS_(2)添加量呈降低趋势,含3.0wt.%MoS_(2)的Fe-15Cu-0.8浸油试样具有最低的摩擦系数值0.071。试样的磨损机制主要为粘着磨损、磨料磨损和氧化磨损。
Fe-15Cu-0.8C-MoS_(2) powder mixes were prepared using Fe,Cu,and graphite as the main raw materials,MoS_(2) and zinc stearate as lubricants.Fe-15Cu-0.8C-MoS_(2) antifriction materials were prepared by pressing and sintering the powder mixtures.Density,microstructures,hardness,and tribological properties of the sintered Fe-15Cu-0.8C-MoS_(2) samples were investigated.The results show that the density of the sintered samples decreases slightly as MoS_(2) content increases.The hardness gradually increases and then tends to be stable.The sintered Fe-15Cu-0.8C-3MoS_(2) sample has the maximum hardness value of about 70HRB.Microstructure of the sintered samples are mainly composed of pearlite,Cu and MoS_(2).MoS_(2) remains more as the addition amount of MoS_(2) increases in the powder mixtures.Friction coefficient of the sintered Fe-15Cu-0.8C-MoS_(2) samples impregnated with lubrication oil first decreases and then increases.The Fe-15Cu-0.8C-3 wt.%MoS_(2) samples has a lowest friction coefficient of 0.071 under test load of 300N.The wear mechanisms are mainly adhesive wear,abrasive wear and oxidation wear.
作者
李佳欣
包宇
冯晗
陈鹏起
王士平
程继贵
Li Jiaxin;Bao Yu;Feng Han;Chen Pengqi;Wang Shiping;Cheng Jigui(School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009;Research Centre for Powder Metallurgy Engineering and Technology of Anhui Province,Hefei 230009;Maʼanshan Powder Metallurgy Factory in East China,Maʼanshan 243012)
出处
《航天制造技术》
2023年第3期6-12,共7页
Aerospace Manufacturing Technology
基金
安徽省重点研究与开发计划项目(202104a05020046)。
关键词
粉末冶金
铁基减摩材料
MoS_(2)含量
显微组织
摩擦磨损
powder metallurgy
ferrous antifiction materials
MoS_(2) contents
microstructure
friction properties
