Aluminizing Low Carbon Steel at Lower Temperatures  

作　　者：Xiao Si Bining Lu Zhenbo Wang 

机构地区：[1]Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China [2]The High School Affiliated to Renmin University of China, Beijing 100080, China

出　　处：《Journal of Materials Science & Technology》2009年第4期433-436,共4页材料科学技术（英文版）

基　　金：supported by the National Science Foundation of China (Nos.50701044 and 50890171);the Ministry of Science and Technology of China (No.2005CB623604)

摘　　要：This study reports the significantly enhanced aluminizing behaviors of a low carbon steel at temperatures far below the austenitizing temperature, with a nanostructured surface layer produced by surface mechanical attrition treatment （SMAT）. A much thicker iron aluminide compound layer with a much enhanced growth kinetics of η-Fe2Al5 in the SMAT sample has been observed relative to the coarse-grained steel sample. Compared to the coarse-grained sample, a weakened texture is formed in the aluminide layer in the SMAT sample. The aluminizing kinetics is analyzed in terms of promoted difusivity and nucleation frequency in the nanostructured surface layer.This study reports the significantly enhanced aluminizing behaviors of a low carbon steel at temperatures far below the austenitizing temperature, with a nanostructured surface layer produced by surface mechanical attrition treatment （SMAT）. A much thicker iron aluminide compound layer with a much enhanced growth kinetics of η-Fe2Al5 in the SMAT sample has been observed relative to the coarse-grained steel sample. Compared to the coarse-grained sample, a weakened texture is formed in the aluminide layer in the SMAT sample. The aluminizing kinetics is analyzed in terms of promoted difusivity and nucleation frequency in the nanostructured surface layer.

关 键 词：Nanostructured materials Surface mechanical attrition treatment ALUMINIZING DIFFUSION NUCLEATION 

分 类 号：TG142.31[一般工业技术—材料科学与工程] TQ153.11[金属学及工艺—金属材料]