摘要
在流动氮气氛下,采用高能球磨法制备出了含氮不锈钢粉末,随后利用冷压及烧结工艺获得了含氮不锈钢材料,研究了粉末随球磨时间的增加其物相、粒度、形貌、氮含量的变化及烧结体的显微组织。结果表明:随球磨时间的延长,粉末不断细化,氮含量也呈增加趋势,但球磨超过4h后,粉末不再发生细化,氮含量的增长也变得极其缓慢。烧结体为奥氏体—铁素体双相组织,相对密度达到97%,最终氮含量为(质量分数)0.27%,其拉伸性能优于高压熔炼法制得的含氮不锈钢。
The powders of nitrogen-contained stainless steels were prepared by high-energy ball milling under flowing Na atmosphere and were subsequently cold-pressed and sintered. The variation of phases, sizes, morphologies, nitrogen contents of powders with the increasing milling time and the microstructure of sintered samples were studied. The results show that the particle size~ of powders become finer and their nitrogen contents tended to higher level with the increasing milling time, but above 4h milling, the particle sizes of powders could not be further fined and the nitrogen contents of powders increase quite slowly. The sintered body has austenite-ferrite duplex microstructures, its relative density could reach 97% , nitrogen content is （mass） 0.27 % and its tensile properties are superior to those of the materials produced by high pressure melting method.
出处
《粉末冶金技术》
EI
CAS
CSCD
北大核心
2007年第1期3-6,共4页
Powder Metallurgy Technology
基金
国家973计划资助项目(TG2000067203)
关键词
含氮不锈钢
粉末
高能球磨
烧结
nitrogen-contained stainless steel
powder ： high-energy ball milling
sintering
