SiO_(2)颗粒形貌及含量对铁基粉末冶金材料性能的影响  

Effect of different morphological SiO_(2) contents on the properties of iron-based powder metallurgy materials

作　　者：张明豪 尹彩流 杨明 张新疆 王秀飞 李乘波 ZHANG Minghao;YIN Cailiu;YANG Ming;ZHANG Xinjiang;WANG Xiufei;LI Chengbo(Guangxi Colleges and Universities Key Laboratory of Environmental-friendlyMaterials and New Technology for Carbon Neutralization,Guangxi Key Laboratory ofAdvanced StructuralMaterials and Carbon Neutralization,School ofMaterials and Environment,GuangxiMinzu University,Nanning 530105,China;BeijingYoucaitec Material Co.,Ltd.,Beijing 100095,China)

机构地区：[1]广西高校环境友好材料及碳中和新技术重点实验室,广西先进结构材料与碳中和重点实验室,材料与环境学院,广西南宁530105 [2]北京优材百慕航空器材有限公司,北京100095

出　　处：《粉末冶金工业》2024年第4期33-40,53,共9页Powder Metallurgy Industry

基　　金：广西科技重大“尖峰行动”专项资助(桂科AA23062026,桂科AA23062036)

摘　　要：采用粉末冶金技术分别制备了以球形和不规则SiO_(2)颗粒作为增强介质的铁基粉末冶金材料,同时考察了SiO_(2)颗粒不同形貌和不同含量对该材料微观组织和性能的影响,测试表征了材料的微观结构、密度、硬度、室温拉伸及摩擦磨损性能。研究结果表明:球形和不规则SiO_(2)颗粒在基体中分布均匀,SiO_(2)/铁基体之间未发生界面反应;相同添加含量下,球形SiO_(2)加入的铁基粉末冶金材料密度降低更小;SiO_(2)颗粒的加入显著提高了基体的硬度和抗拉强度,添加2.0%球形和不规则SiO_(2)将基体材料的硬度从96HBW分别提高至161HBW和158HBW,添加1.0%球形和2.0%不规则SiO_(2)将基体材料的抗拉强度从161 MPa分别提高至217 MPa和231 MPa;SiO_(2)颗粒形貌对基体材料摩擦磨损性能的影响趋势基本一致,当球形和不规则SiO_(2)颗粒的加入显著降低了基体的摩擦因数和磨损量,且材料的摩擦因数和磨损量随着SiO_(2)颗粒含量的提高而降低。The research direction of SiO_(2)particle-enhanced powder metallurgy friction materials mainly focused on factors such as particle size,mixed particles,particle content and particle modification,with little research reported on particle morphology.In this experiment,iron-based powder metallurgical materials with spherical and irregular SiO_(2)particles as reinforcing medium were prepared by powder metallurgy technology,respectively,and the effects of different morphologies and different contents of SiO_(2)particles on the microstructures and properties of the materials were also investigated,and the microstructures,densities,hardnesses,room-temperature tensile and friction and wear properties of the materials were characterized in the tests.Spherical and irregular SiO_(2)particles are uniformly distributed in the matrix,and no interfacial reaction occurs between SiO_(2)/iron matrix.The density of iron-based powder metallurgy materials with the addition of spherical SiO_(2)decreases less at the same addition content.The addition of SiO_(2)particles significantly increases the hardness and tensile strength of the matrix.The addition of 2.0%of spherical and irregular SiO_(2)increases the hardness of the matrix material from 96HBW to 161HBW and 158HBW,respectively,and the addition of 1.0%spherical and 2.0%irregular SiO_(2)increases the tensile strength of the matrix material from 161 MPa to 217 MPa and 231 MPa,respectively.The influence of the morphology of SiO_(2)particles on the friction and wear performance of the matrix material has the same trend,where the addition of spherical and irregular SiO_(2)particles significantly lowers the friction factor and wear amount of the matrix.The friction factor and wear amount of the material are significantly reduced with the increase of SiO_(2)particle content.Spherical SiO_(2)particles have good fluidity,so that the mixed powder pressing performance has been improved,conducive to material densification.The addition of hard particles can be assessed by the material of the a

关 键 词：铁基粉末冶金 颗粒形貌 力学性能 磨损 SiO_(2)颗粒 

分 类 号：TF125[冶金工程—粉末冶金]