等离子喷涂参数对TiB_2可湿润阴极涂层沉积效率的影响  

Effect of atmospheric plasma spraying parameters on deposition efficiency of TiB_2 wettable cathode coating

作　　者：彭如振[1] 李荣兴[1] 俞小花[1] 谢刚 

机构地区：[1]昆明理工大学冶金与能源工程学院,云南昆明650093 [2]云南冶金集团,云南昆明650031

出　　处：《金属热处理》2016年第3期37-42,共6页Heat Treatment of Metals

基　　金：可湿润性阴极TiB_2涂层基础研究(KKK0201352107)

摘　　要：采用大气等离子喷涂(APS)在石墨质碳阴极材料上沉积TiB_2可湿润性阴极涂层。研究了喷涂工艺参数对涂层沉积效率的影响。结果表明,涂层沉积效率随喷涂距离的增加而增加,随主气流量、喂料速率和喷涂功率增加呈现出先增加后减少的趋势,随粉末尺寸的减少而增加。最佳工艺参数为:喷涂距离80 mm,主气流量1900 L/h,送粉气流量(Ar)120 L/h,喂料速率27.34 g/min,喷涂功率35.8 k W,颗粒直径(d_(50))≤37.4μm,该条件下涂层沉积效率为67.26%。该TiB_2涂层在220 k A铝电解槽上应用,槽稳定后铝液中Ti含量为0.0021wt%。TiB_2 wettable cathode coating was prepared on graphitiferous cathode carbon block by atmospheric plasma spraying（ APS）. The influence of the plasma spraying parameters on deposition efficiency of the TiB_2 coating was examined. The results show that the deposition efficiency of TiB_2 coating increases with the spray distance increasing. With the increase of plasma Ar gas flow,powder feed rate and power,the deposition efficiency first increase and then decrease. The deposition efficiency increases with powder size decreasing. The optimized parameters are 80 mm for spray distance,1900 L/h for plasma Ar gas flow,120 L/h for carrier Ar gas flow,35. 8 k W for powder,27. 34 g/min for feed rate,≤37. 4 μm for powder size（ d50）,under which,deposition efficiency is up to 62. 7%. The result of the TiB_2 coating in220 k A aluminum electrolysis cell indicate that the content of titanium in molten aluminum is 0. 0021wt%.

关 键 词：等离子喷涂 TiB_2涂层 沉积效率 

分 类 号：TG174.44[金属学及工艺—金属表面处理]