等离子球化钨粉  

Plasma Spheroidization of Tungsten Powder

作　　者：侯玉柏[1] 曾克里[1] 于月光[1] 任光京[1] 许根国[1] 马江虹[1] 

机构地区：[1]北京矿冶研究总院,北京100044

出　　处：《有色金属》2008年第1期41-43,共3页Nonferrous Metals

摘　　要：研究以Ar为工作气体,H2为送粉气体,用高频感应等离子体炬制备球化钨粉的过程。球化后的钨粉在流动速度和松装密度方面有了非常大的提高。等离子功率低,则得不到球形钨粉,等离子体功率过高,则钨粉氧化和烧损都非常严重。熔融的钨颗粒直接导入水中冷却,球形钨粉表面有轻微氧化,生成WO1.09,在H2气氛中进行950℃,1h还原处理效果良好,而且粉末的形貌基本没有改变。制得球形钨粉的适宜工艺条件是电压70V,电流500A。The preparation process of spheroidal tungsten powder by the induction coupled plasma torch with pure Ar as working gas and Ha as medium gas is investigated. The flow rate and loose density are enhanced greatly after spheroidizing. When the plasma power is high, with burning and oxidating a lot of powders are lost. When the melting tungsten powders flow into the water, the surface of powders are oxidized gently. The product is WO1.09. At last the powders are deacidized at 950℃ in the Ha atmosphere. The optimum parameters are： electric voltage 70V; current flow 500A.

关 键 词：粉末冶金 钨粉 等离子体 球化 

分 类 号：TF123.2[冶金工程—粉末冶金] TF123.73[冶金工程—冶金物理化学]