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以纯金属粉末Fe、Cr、Ni、W、Ti和纳米Y2O3为原料(成分配比为Fe-18Cr-8Ni-2W-1Ti-0.35Y2O3),通过在氮气氛围下高能球磨的方式实现混合粉末的合金化。在球磨时间不变的情况下,改变氮气压力,获得含氮量不同的合金钢粉末。研究了氮含量对粉末形貌、粒度、粉末相组成、晶格畸变程度以及合金化效果的影响。球磨后的粉末在900和1100℃下退火,研究了退火温度及含氮量对退火后粉末相组成的影响。
Pure alloyed powders of Fe, Cr, Ni, W, Ti and nano Y2O3 were used as raw materials (composition ratio is Fe-18Cr-8Ni-2W-1Ti-0.35Y2O3) The Under the condition of constant milling time, the nitrogen pressure is changed to obtain the alloy steel powder with different nitrogen contents. The effect of nitrogen content on the morphology, particle size, phase composition, degree of lattice distortion and alloying effect was investigated. The ball milled powders were annealed at 900 and 1100 ℃. The effects of annealing temperature and nitrogen content on the phase composition of the powders were investigated.