机械合金化制备含氮ODS奥氏体不锈钢粉末  

Preparation of ODS Austenitic Stainless Steel Powder Containing Nitrogen by Mechanical Alloying

作　　者：许迎利[1] 周张健[1] 李明[1] 何培[1] 

机构地区：[1]北京科技大学特种陶瓷与粉末冶金实验室,北京100083

出　　处：《稀有金属材料与工程》2010年第A01期89-93,共5页Rare Metal Materials and Engineering

基　　金：国家重点基础研究发展规划("973"计划)(2007CB209800)

摘　　要：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 Fe, Cr, Ni, W, Ti and nano-Y2O3 powders （the compositions of the powders are Fe-18Cr-8Ni-2W-1Ti-0.35Y2O3） were processed by high energy mechanical milling under N2 atmosphere. Powders with diverse nitrogen contents were processed by altering the pressure of N2 with fixed milling time. The effect of nitrogen contents on particle morphology, particle size, phase, deformation of crystal lattice and element distribution due to solid solution were investigated during the processing. The as-milled powders were then annealed under vacuum at 900 and 1100 ℃ to promote the formation of the equilibrium phases. X-ray diffraction was used for phase identification.

关 键 词：氮含量 机械合金化 氧化物弥散强化(ODS) 奥氏体不锈钢 

分 类 号：TF123.2[冶金工程—粉末冶金]