振动式电脉冲沉积铝化物微晶涂层对Cr5Mo钢高温腐蚀性能的影响  

High-temperature Corrosion Behavior of Cr5Mo Steel with Micro-crystalline Aluminide Coating by Vibratile Electro-pulse Deposition

作　　者：宋洪建[1] 马静[2,3] 何业东[2] 

机构地区：[1]中国石化集团金陵石化有限公司,南京210037 [2]北京科技大学北京市腐蚀,磨蚀与表面技术重点实验室,北京100083 [3]河北科技大学材料学院

出　　处：《北京科技大学学报》2004年第3期272-276,共5页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金(59801002);中国石化集团金陵石化有限公司资助

摘　　要：采用振动式电脉冲沉积装置在Cr5Mo钢表面沉积了厚度达100μm的铝化物微晶涂层.在沉积涂层的过程中,铝电极与工件瞬时接触放电,产生很高的温度,形成了铁铝金属间化合物涂层;电极瞬时分离,涂层迅速冷却,获得了微晶结构,而且涂层与基体具有冶金结合.600℃空气中氧化200h,600℃流动的99.98％SO_2气氛中硫化50h的实验结果和SEM,XRD分析结果表明,沉积铝化物做晶涂层后Cr5Mo钢的抗氧化、硫化性能均得到大幅度提高.A micro-crystalline aluminide coating of 100μm thick was obtained by vibratile electro-pulse de- position on Cr5Mo steel. An Fe-Al intermetallic compound layer forms due to high temperature during instant dis- charging between alumimum electrodes and specimens, micro-crystalline structure is achieved due to the high cool- ing rate during deposition, and the coating bonds with the substrate firmly. The experimential results of oxidation in air for 200h at 600℃ and sulfuration in flowing 99.98%SO_2 for 50h at 600℃ and the analysis of SEM and XRD show that the high temperature oxidation and sulfuration resistances of Cr5Mo steel with aluminide coating are gre- atly improved.

关 键 词：电脉冲沉积 铝化物涂层 CR5MO 

分 类 号：TG174.32[金属学及工艺—金属表面处理]