用机械合金化法制备含氮不锈钢粉末

Preparation of stainless steel powder containing nitrogen by mechanical alloying technique

采用机械合金化法(MA)分别在N_2气氛和氨水介质中利用高能球磨进行了含氮不锈钢粉末的制备，探讨了MA法对含氮不锈钢粉末性能的影响．结果表明，随球磨时间延长，粉末含氮量升高，接近高氮不锈钢氮含量，且颗粒不断细化，球磨10h的粉末粒度可达到1．878μm．

The mechanical alloying （MA） technique was used to prepare stainless steel powders containing nitrogen by high energy ball milling under N2 atmosphere and NH3·H2O medium. The effect of MA technique on the property of the powders was investigated. The results showed that the nitrogen content in the powder increased and the powder size decreased with increasing milling time. The nitrogen content in the powder was close to that in high nitrogen stainless steel. The powder size was close to 1.878 μm when milling was carried out for 10 h.