金刚石制品用Fe-Co-Cu预合金粉末的制备及其粒度控制  

Preparation and granularity control of Fe-Co-Cu prealloyed powder

作　　者：向波[1] 谢志刚[1] 贺跃辉[1] 黄艳华[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2007年第2期123-128,共6页Materials Science and Engineering of Powder Metallurgy

基　　金：广西科学研究与技术开发计划资助项目(桂科能05112001-2B1)

摘　　要：用共沉淀热分解法制备了用于金刚石制品的Fe-Co-Cu预合金粉。研究了共沉淀反应的pH值、温度、溶液浓度、加料顺序和速度对粉末粒度的影响,以及热分解条件对粉末粒度和含氧量的影响。用X射线衍射仪(XRD)分析粉末的物相组成,用扫描电子显微镜(SEM)观察其形貌特征。研究结果表明:采用快速并流共沉淀方式,当共沉淀反应pH值为6.5～7.0、反应温度为50～70℃、金属盐溶液A与复合沉淀剂溶液B浓度均为0.5～0.8 mol.L?1时,制得的前驱体粉末在510～550℃分解30～50 min,得到收得率高、含氧量较低、粒度适中的Fe-Co-Cu预合金粉末。Fe-Co-Cu prealloyed powder was fabricated by co-precipitation and thermal decomposition method. The effects of co-precipitation temperature, concentration, pH value, charging sequence and rate on the particle size, and the condition of the thermal decomposition on the particle size and oxygen content were studied. The composition and morphology of the powder were characterized by X-ray dififraction（XRD） and scanning electronic microscope （SEM）. The results show that the prealloyed powder of high recovery ratio, lower oxygen content and appropriate granularity can be prepared by thermal decomposition of the precursor powder in 510-550 ℃ for 30-50 min by using a quick parallel-flow co-precipitation mode with co-precipitation temperature of 50-70 ℃, reaction pH value of 6.5-7.0, and both the metal-salt solution A and complex precipitator B concentration of 0.5-0.8 mol·L^-1.

关 键 词：共沉淀法 预合金粉 粒度 

分 类 号：TF123.5[冶金工程—粉末冶金] TQ164[冶金工程—冶金物理化学]