Effect of Heat Treatment on the Structure of High-Nitrogen Austenitic Corrosion-Resistant 04Kh22AG17N8M2F and 07Kh20AG9N8MF Steels

被引：3
|
作者：
Berezovskaya, V. V. [1 ]
Kostina, M. V. [2 ]
Blinov, E. V. [2 ]
Bobrova, V. E. [1 ]
Bannykh, I. O. [2 ]
机构：
[1] Ural State Tech Univ UPI, Ul Mira 19, Ekaterinburg 620002, Russia
[2] Russian Acad Sci, Baikov Inst Met & Mat Sci, Moscow 119991, Russia
来源：
RUSSIAN METALLURGY | 2009年 / 02期
基金：
俄罗斯基础研究基金会;
关键词：
81.40.Gh; 81.65.Kn;
D O I：
10.1134/S0036029509020086
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The structures of high-strength austenitic 04Kh22AG17N8M2F and 07Kh20AG9N8MF steels are studied after various heat-treatment conditions, and the relation between these structures and the mechanical and chemical properties of these steels is analyzed. The phase compositions of the steels, the morphology of phases, the fine structure of austenite, and the mechanism of its decomposition upon heating are investigated by X-ray diffraction and transmission electron microscopy. The homogeneous decomposition of the supersaturated gamma solid solution in the 04Kh22AG17N8M2F steel at 500 degrees C is shown to be accompanied by the formation of the CrN nitride, which is isomorphic to the matrix, and to increase the strength and elastic stresses in the austenite, decreasing the stress corrosion cracking (SCC) resistance of the steel. Heating at 800 degrees C facilitates stress relaxation and increases the SCC resistance of the steel.
引用
收藏
页码：146 / 153
页数：8
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