Interaction Between Elements Nb and Mo During Precipitation in Microalloyed Austenite  

作　　者：YUAN Shao-qiang LIANG Guo li ZHANG Xiao-juan 

机构地区：[1]Department of Eleetromeehanieal Engineering, Tangshan College, Tangshan 063000, Hebei, China

出　　处：《Journal of Iron and Steel Research International》2010年第9期60-63,共4页

基　　金：Item Sponsored by Natural Science Foundation of Hebei Province of China (E2008001141)

摘　　要：Thermo-simulation test and transmission electron microscopy （TEM） have been used to investigate the interaction between the microalloying elements Nb and Mo within the precipitates during relaxation after austenite deformation of C-Ti-Mo steel and C-Nb-Mo steel. The experimental results demonstrated that the austenitic structure was preserved both in C-Ti-Mo steel and C-Nb-Mo steel even if they were relaxed for 1000 s after deformation at 850℃. The strainqnduced precipitate occurs in two kinds of steel. Through the energy spectrum analysis, it was found that the precipitates were Ti（C, N） and Mo-bearing Nb（C, N） respectively and there exists a strong affinity of Mo for Nb with in the precipitates. Mo atoms would enter the lattice of Nb（C, N） particles probably after Nb（C, N） formation.Thermo-simulation test and transmission electron microscopy （TEM） have been used to investigate the interaction between the microalloying elements Nb and Mo within the precipitates during relaxation after austenite deformation of C-Ti-Mo steel and C-Nb-Mo steel. The experimental results demonstrated that the austenitic structure was preserved both in C-Ti-Mo steel and C-Nb-Mo steel even if they were relaxed for 1000 s after deformation at 850℃. The strainqnduced precipitate occurs in two kinds of steel. Through the energy spectrum analysis, it was found that the precipitates were Ti（C, N） and Mo-bearing Nb（C, N） respectively and there exists a strong affinity of Mo for Nb with in the precipitates. Mo atoms would enter the lattice of Nb（C, N） particles probably after Nb（C, N） formation.

关 键 词：thermo-simulation microstructure strain-induced precipitation RELAXATION CARBONITRIDE 

分 类 号：TG142.71[一般工业技术—材料科学与工程] TG142.13[金属学及工艺—金属材料]