摘要
研究了氧化-还原法直接再生回收高密度合金切屑粉末的工艺技术。发现通过控制工艺参数,如在850℃使用氢还原,能够得到高质量的再生高密度合金粉末,其粒度细小,约为1 μm,粉末形状规则;而当还原温度提高至900℃及其以上时,还原粉末长大,表面变得不规则,在原始颗粒表面生长出许多根须。随着还原温度从900℃提高至950℃,再生粉末的含氧量由0.2314％降低至0.1700％;此外,氧化-还原法直接再生回收的高密度合金粉末化学成分与原始粉末的相同。
The processes of directly recycling high density alloy by oxidation-reduction technique are investigated in details. The particle size of recycled powder is fine, and the shape of powder particle is regular when the final reduction temperature is 850℃. However, if the reduction temperature is and over 900℃, the surface feature of powder is complicated. Increasing reduction temperature from 900℃ to 950℃, the content of oxygen of recycled powder decreased from 0.2314% to 0.1700%, and powder particles grew slightly. It has been also found that the chemical composition of the recycled alloy powder is as same as the initial powder.
出处
《粉末冶金材料科学与工程》
EI
2002年第2期133-138,共6页
Materials Science and Engineering of Powder Metallurgy
关键词
氧化-还原法
再生
高密度合金
oxidation-reduction
recycling
high density alloy
