中文摘要：

针对火花等离子体放电法制得粉末中的氧含量高的现状,对高温合金粉末的还原过程进行了探索性研究。结果表明：火花等离子体放电法制得的氧含量较高的镍基高温合金粉末使用CaH2作为脱氧剂,在常压氩气保护下550℃的低温下即可将原始粉末中的氧含量由9.26%（质量分数,下同）降至1.52%,最终粉末中的氧含量主要取决于CaO的去除情况。

英文摘要：

Due to the high oxygen content of the superalloy powder produced by a novel Spark Plasma Discharge Process,the reduction process of superalloy powder was studied exploringly.Results show that under the protection of argon by atmospheric pressure at 550 ℃ and with CaH2 as its deoxidizer,the oxygen content of the Ni-based superalloy powder prepared by the novel method is decreased from 9.26% to 1.52%,and the final oxygen content depends mainly on the content of CaO left.