Research on the solidified microstructure and segregation behaviors of the UNS N10276 alloy produced by electroslag remelting

作     者：HE Yutian XU Changzheng 

作者机构：Research InstituteBaoshan Iron & Steel Co.Ltd. 

出 版 物：《Baosteel Technical Research》 (宝钢技术研究（英文版）)

年 卷 期：2019年第13卷第4期

页      面：20-29页

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：funded by National Science and Technology Major Project( No. 2015ZX06002001-001) 

主　　题：alloy UNS N10276 solidified microstructure segregation precipitates thermodynamic calculation 

摘      要：In this study,the solidified microstructure and segregation behaviors of the alloying elements and precipitate behaviors of the UNS N10276 alloy in a large-scale electroslag remelting(ESR)ingot were ***,the formation of the solidified microstructure and segregation of ESR were systematically analyzed via thermodynamic *** ESR ingot of the UNS N10276 alloy exhibits a typical dendritic *** secondary dendrite spacing at the head of the ingot is clearly larger than that at the bottom of the *** alloying elements(e.g.,Mo,Mn,Si,and C),which are positive segregation elements,segregate to the interdendritic zones during the solidification ***,Fe,W,and Cr segregate to the dendritic trunk zones,indicating that they are negative segregation *** the alloying elements,Mo segregates the most,especially at the head of the ESR *** of the precipitates that precipitate in the interdendritic zones and at grain boundaries belong to large-scale μ and M6C phases,*** is the main element of the *** precipitates at the head of the ESR ingot are more abundant and larger than those at the bottom of the ***,to improve the metallurgical quality and hot working properties of the UNS N10276 alloy,the segregation of the Mo element should be minimized,whereas the formation of the precipitates should be reduced as much as possible during the optimization of the composition and production processes.