快速凝固高硅铝合金粉末形貌与组织特性研究  

Study on the Morphology and Microstructure Characteristics of Rapidly Solidifi ed High Silicon Aluminum Alloy Powder

作　　者：刘鹏 霍冬亮 疏敏 黄秋良 Liu Peng;Huo Dongliang;Shu Min;Huang Qiuliang(Inner Mongolia Xuyang New Materials Co.,Ltd.,Inner Mongolia,029200)

机构地区：[1]内蒙古旭阳新材料有限公司,内蒙古029200

出　　处：《当代化工研究》2023年第18期21-23,共3页Modern Chemical Research

摘　　要：目的:分析高硅铝合金粉末形貌与组织特性。方法:搭配超音速气体雾化法先进行高硅铝合金粉末形貌的分析,随后,通过显微镜对粉末组织结构进行标注研究,验证结构演变和热效应,最终通过冷却速度的计算来分析过冷度的变化。结果:针对粒度25μm和45μm的高硅铝合金粉末的测定,采用四个阶段进行测试,最终得出以下结果,该粉末自身的过冷度随粒度减小而明显增大,随粒度的增大而减小,这是导致不同粒度粉末组织和结构差异的主要原因。结论:不同粒度状态下,高硅铝合金粉末与过冷度呈现反向的组织特征变动关系。Objective:To analyze the morphology and microstructure of high-silicon aluminum alloy powder.Methods:The morphology of high-silicon aluminum alloy powder was analyzed with supersonic gas atomization method.Then,the microstructure of powder was labeled by micro-scope to verify the structural evolution and thermal effect.Finally,the change of supercooling degree was analyzed by calculating the cooling rate.Results:For the determination of high-silicon aluminum alloy powder with particle size of 25μm and 45μm,four stages were used to test,and the fol-lowing results were obtained.The supercooling degree of the powder itself increased significantly with the decrease of particle size,and decreased with the increase of particle size,which was the main reason for the difference in microstructure and structure of the powder with different particle size.Conclusion:In different particle size states,the microstructure characteristics of high-silicon aluminum alloy powder and the degree of supercooling are reversed.

关 键 词：高硅铝合金 铝合金粉末 形貌状态 组织特性 快速凝固 特征识别 

分 类 号：TG146[一般工业技术—材料科学与工程] TG166.3[金属学及工艺—金属材料]