Vanadium Carbide Coating Growth on Die Steel Substrate in Borax Salt Bath  

作　　者：王洪福 

机构地区：[1]School of Materials Science and Engineering, Wuhan University of Technology [2]School of Mechanical Engineering and Automation, North University of China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2010年第4期600-603,共4页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(No.50675165);the National Key Technology R&D Program(No.2006BAF02A29)

摘　　要：Vanadium pentoxide, borax, boron carbide and sodium fluoride were used to grow vanadium carbide coating on die steel（Cr12, Cr12MoV） surface at 950 ℃ by TD process, which extended the life period of Cr12 and Cr12MoV as punching die. Kinetics of vanadium carbide coating growth was brought forward and verified by comparison of the mathematical model with the experimental results. The thickness of coating was illustrated by SEM. The chemical constituent of coating and remnants were tested by XRD. To increase the thickness, rare earths （FeSiRe23） were added to the borax salt bath. The electronic probe microanalysis （EPMA） revealed that the addition of rare earths could decrease carbon concentration in the coating and increase the depth of vanadium carbide coating.Vanadium pentoxide, borax, boron carbide and sodium fluoride were used to grow vanadium carbide coating on die steel（Cr12, Cr12MoV） surface at 950 ℃ by TD process, which extended the life period of Cr12 and Cr12MoV as punching die. Kinetics of vanadium carbide coating growth was brought forward and verified by comparison of the mathematical model with the experimental results. The thickness of coating was illustrated by SEM. The chemical constituent of coating and remnants were tested by XRD. To increase the thickness, rare earths （FeSiRe23） were added to the borax salt bath. The electronic probe microanalysis （EPMA） revealed that the addition of rare earths could decrease carbon concentration in the coating and increase the depth of vanadium carbide coating.

关 键 词：vanadium carbide coating TD process punching die rare earths 

分 类 号：TG174.4[金属学及工艺—金属表面处理]