Fabrication of high nitrogen austenitic stainless steels with excellent mechanical and pitting corrosion properties

作     者：Hua-bing Li Zhou-hua Jiang Yang Cao Zu-rui Zhang 

作者机构：School of Materials and Metallurgy Northeastern University Shenyang 110004 China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2009年第16卷第4期

页      面：387-392页

核心收录：

学科分类：080602[工学-钢铁冶金] 08[工学] 0806[工学-冶金工程] 

基　　金：supported by the National Natural Science Foundation of China(No.50534010) 

主　　题：high nitrogen austenitic stainless steels electroslag remelting nitrogen alloying ductile-brittle transition pitting corrosion resistance 

摘      要：A series of high nitrogen austenitic stainless steels were successfully developed with a pressurized electroslag remelting furnace. Nitride additives and deoxidizer were packed into the stainless steel pipes, and then the stainless steel pipes were welded on the surface of an electrode with low nitrogen content to prepare a compound electrode. Using Si3N4 as a nitrogen alloying source, the silicon contents in the ingots were prone to be out of the specification range, the electric current fluctuated greatly and the surface qualities of the ingots were poor. The surface qualities of the ingots were improved with FeCrN as a nitrogen alloying source. The sound and compact macrostructure ingot with the maximum nitrogen content of 1.21wt% can be obtained. The 18Cr18Mn2Mo0.9N high nitrogen austenitic stainless steel exhibits high strength and good ductility at room temperature. The steel shows typical ductile-brittle transition behavior and excellent pitting corrosion resistance properties.