Effect of nitrogen on microstructure and properties of martensitic stainless steel 00Cr13Ni4Mo

被引：0

作者：

Ma, Xiao-Ping ^{[1
]}

Wang, Li-Jun ^{[1
]}

Wang, Yuan-Yuan ^{[1
]}

Qin, Bin ^{[2
]}

Liu, Chun-Ming ^{[1
]}

Sundaresa, Subramanian ^{[3
]}

机构：

[1] Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, Shenyang 110819, China

[2] Research Institute for Stainless Steel, R and D Center, Baoshan Iron and Steel Co Ltd, Shanghai 201900, China

[3] Department of Materials Science and Engineering, Hamilton L8S 4M1, Canada

来源：

Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment | 2012年 / 33卷 / 04期

关键词：

Light transmission - Tempering - Steel corrosion - Chromium alloys - Molybdenum alloys - Austenite - Microstructure - Pitting - Ternary alloys - Martensitic stainless steel - Martensitic transformations - Corrosion resistance;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Effect of adding 0.04%N to 00Cr13Ni4Mo martensitic stainless steel on its solid phase transformation behavior and microstructure was investigated by means of dilatometry, optical microscopy and transmission electron microscopy (TEM). Mechanical properties and pitting corrosion resistance of the steel were evaluated by tensile, impact and electrochemical tests. The results show that solid-solutioned nitrogen effectively enhances the strength of the steel, however, decreases its elongation and toughness after normalizing from 1050°C. Tempering the steel at temperatures above 550°C promotes formation of retained austenite, which is reversed austenite distributed along martensitic lath boundaries and within laths, restoring the ductility and toughness of the steel. N is found to retard the kinetics of the formation of reversed austenite, thereby retarding the softening of the steel during tempering. Precipitation of Cr2N at martensite lath boundaries and within laths occurs simultaneously when the nitrogen-alloyed martensitic stainless steel is tempered at temperatures above 550°C, which causes the decrease in toughness and pitting corrosion potential. Traditional heat treatment of normalizing and tempering at temperature above Acl is not suitable for high nitrogen martensitic stainless steel to achieve good combined properties.

引用

页码：77 / 84