摘要
采用直流电弧热等离子体对不规则TA1粉末进行球化处理。利用金相显微镜、扫描电子显微镜、粒度粒形分析仪、霍尔流速计、斯科特容量计及氧氮分析仪等分析测试手段,研究球化工艺对粉末组织形貌、粒度分布、球形度、流动性、松装密度及氧含量的影响。结果表明,球化处理可将不规则形状TA1粉末球化为表面附着亚微米颗粒的实心球形;球形粉末内部组织由等轴状α相转变为长条状α相。球化处理使TA1粉末平均粒径和氧含量降低,球形度升高。原料粉末粒度越小、等离子体发生器功率越高,球化后粉末平均粒径越小,球形度越高;但会导致球化后粉末中亚微米颗粒含量增加、粉末流动性变差、松装密度降低;去除亚微米颗粒可以提高粉末流动性,并进一步降低氧含量。
In this work, the irregular pure titanium powder was spheroidized by DC arc thermal plasma. Metallographic microscope, scanning electron microscope, particle size analyzer, Hall flowmeter, Scott volumeter and oxygen-nitrogen analyzer were used to study the particle size of raw material powder and the power of plasma generator in the process of spheroidization, and the effects on the microstructure, particle size, sphericity, fluidity, bulk density and oxygen content of the spheroidized powder. The results show that the irregular TA1 powder is spheroidized into solid spherical powder with uniform particle size after thermal plasma spheroidization. The surface is coated with a layer of submicron particle. After spheroidization, the internal structure of the powder changes from the initial equiaxed α phase to the long strip α phase. The average particle size and oxygen content of TA1 powder decrease and the sphericity increase by thermal plasma spheroidization. The smaller the particle size of raw powder and the greater the power of plasma generator, the smaller the average particle size of spheroidized powder and the higher the sphericity. Too small particle size of raw material powder and too high power of plasma generator will lead to the increase of nano-particle content in the powder after spheroidization, the deterioration of powder fluidity and the decrease of bulk density. Removing submicron particle can improve the fluidity of powder.
作者
宋美慧
李岩
张煜
李艳春
张晓臣
安德烈·萨莫欣
陈卓
韩芳明
Song Meihui;Li Yan;Zhang Yu;Li Yanchun;Zhang Xiaochen;Samokhin Andrey;Chen Zhuo;Han Fangming(Institute of Advanced Technology,Heilongjiang Academy of Sciences,Harbin 150009,China;Institute of Metallurgy and Materials,Russian Academy of Sciences,Moscow 119991,Russia;Aerospace Haiying(Harbin)Titanium Co.,Ltd,Harbin 150009,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2023年第2期617-622,共6页
Rare Metal Materials and Engineering
基金
黑龙江省“百千万”工程科技重大专项(2020ZX10A03)
黑龙江省重点研发计划(GA21A104)。
关键词
热等离子体球化
钛合金粉末
功率
球形度
松装密度
thermal plasma spheroidization
titanium alloy powder
power
sphericity
loose density
