Effect of Holding in Mushy Zone on Precipitation Behavior of Cr18Mn18N Austenitic Stainless Steel
Author of the article:CAO Rong;JIN Qinglin;LI Shenglin;GU Hangzhen
Author's Workplace：College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
Key Words：holding in mushy zone nitrogen content microstructure sigma
Abstract：
Cr18Mn18N austenitic stainless steel was prepared by the nitriding process of melting holding in mushy zone. The effect of melting holding in mushy zone on nitrogen content and microstructure of Cr18Mn18N alloy was studied. The results show that the nitrogen content in the ingot increases from 0.161% to 0.384 with the increase of holding time in mushy zone when nitrogen pressure is 0.1 MPa, while the porosity decreases from 3.69% to 3.25%. With the increase of nitrogen content, the volume fraction of austenite structure increases gradually, ferrite and a phase decrease gradually, and when nitrogen content is 0.279%, the nucleation of a phase is completely inhibited.
