Research on Powder Metallurgy High Nitrogen Stainless Steels

被引：2

作者：

Cui, Dawei ^{[1
]}

Wang, Jinlong ^{[1
]}

机构：

[1] Weifang Univ, Dept Machinery, Weifang 261061, Peoples R China

来源：

MATERIAL DESIGN, PROCESSING AND APPLICATIONS, PARTS 1-4 | 2013年 / 690-693卷

基金：

中国国家自然科学基金;

关键词：

nitrogen; austenitic stainless steels; mechanical alloying; powder metallurgy; CORROSION;

D O I：

10.4028/www.scientific.net/AMR.690-693.172

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High nitrogen Fe-18Cr-12Mn-3Mo-xN austenitic stainless steels were prepared by mechanical alloying and powder metallurgical pressing-sintering techniques. The microstructures, nitrogen contents and sintering properties of the milled powders and sintered bodies had been also investigated. The results show that high nitrogen and nearly spherical composite powders with good compressibility can be obtained by high-energy vibration ball milling and high temperature nitriding. It is also found that the sintering temperature has a significant effect on the density and the nitrogen content of sintered specimens, and the optimal sintering temperature are determined to be 1250 degrees C, at which a favorable combination of the relative density as high as 97.1% and the final nitrogen content of 0.79wt% in sintered specimens can be obtained. The sintered bodies mainly consist of gamma-austenite, a-ferrite and the lamellar Cr2N phase. After solution-annealing at 1150 degrees C for 1.5h followed by water-quenching, high nitrogen austenitic stainless steels reveal a fully austenitic structure.

引用

页码：172 / +

页数：2

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