Effect of Zone Melting on Microstructure of 304 Stainless Steele under Nitrogen Atmosphere
Author of the article:LI Shenglin;JIN Qinglin;CAO Rong;GU Hangzhen
Author's Workplace：College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
Key Words：304 stainless steel nitrogen pressure microstructure orientation relation
Abstract：
Nitrogen containing 304 austenitic stainless steel was prepared by zone melting method. The effect of nitrogen pressure on microstructure and orientation of austenite and ferrite was investigated. The results show that with the increase of nitrogen pressure and the content of nitrogen, the volume fraction of austenite increased and ferrite decreased. The increase of nitrogen pressure will promote the peritectic transformation process and make more ferrite transform into austenite. With the increase of nitrogen pressure, the consistency of ferrite and heat flow direction will become worse. In addition, with the increase of nitrogen pressure, the orientation relationship between ferrite and austenite will not only maintain the original K-S relationship, but also the N-W relationship.
