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MoS2含量对Fe-15Cu-0.8C减摩材料组织和性能的影响 |
李佳欣1,包 宇1,冯 晗1,陈鹏起1,2,王士平3,程继贵1,2
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1.合肥工业大学 材料科学与工程学院,合肥 230009;2.安徽省粉末冶金工程与技术研究中心,合肥230009;3.马鞍山市华东粉末冶金厂,马鞍山 243012
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摘要: |
以Fe、Cu、石墨粉为主要原料,MoS2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MoS2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-3MoS2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MoS2组成。MoS2在烧结时会部分分解,但随着MoS2加入量增加,烧结体试样中残留MoS2含量增加。在一定范围内,浸油处理后试样的摩擦系数也随MoS2添加量呈降低趋势,含3.0wt.%MoS2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。 |
关键词: 粉末冶金;铁基减摩材料;MoS2含量;显微组织;摩擦磨损 |
基金项目:安徽省重点研究与开发计划项目(202104a05020046) |
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Effects of MoS2 Addition on the Microstructure and Properties of Fe-15Cu-0.8C Antifriction Materials |
Li Jiaxin1, Bao Yu1, Feng Han1, Chen Pengqi1,2, Wang Shiping3, Cheng Jigui1,2
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1. School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009;2. Research Centre for Powder Metallurgy Engineering and Technology of Anhui Province, Hefei 230009;3. Ma?anshan Powder Metallurgy Factory in East China, Ma?anshan 243012
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Abstract: |
Fe-15Cu-0.8C-MoS2 powder mixes were prepared using Fe, Cu, and graphite as the main raw materials, MoS2 and zinc stearate as lubricants. Fe-15Cu-0.8C-MoS2 antifriction materials were prepared by pressing and sintering the powder mixtures. Density, microstructures, hardness, and tribological properties of the sintered Fe-15Cu-0.8C-MoS2 samples were investigated. The results show that the density of the sintered samples decreases slightly as MoS2 content increases. The hardness gradually increases and then tends to be stable. The sintered Fe-15Cu-0.8C-3MoS2 sample has the maximum hardness value of about 70HRB. Microstructure of the sintered samples are mainly composed of pearlite, Cu and MoS2. MoS2 remains more as the addition amount of MoS2 increases in the powder mixtures. Friction coefficient of the sintered Fe-15Cu-0.8C-MoS2 samples impregnated with lubrication oil first decreases and then increases. The Fe-15Cu-0.8C-3 wt.% MoS2 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. |
Key words: powder metallurgy;ferrous antifiction materials;MoS2 contents; microstructure;friction properties |