化学法去除热喷涂镍铬铝钇硅涂层的酸洗液成分和工艺研究  

Study on Composition and Process of Pickling Liquid for Chemical Removal of Thermal Sprayed NiCrAlYSi Coating

作　　者：夏春阳 侯伟骜 杨文超 章德铭 XIA Chunyang;HOU Weiao;YANG Wenchao;ZHANG Deming(BGRIMM Technology Group,Beijing 100160,China;BGRIMM Advanced Materials Science&Technology Co.,Ltd.,Beijing 102206,China;Northeastern University,Shenyang 110819,China)

机构地区：[1]矿冶科技集团有限公司,北京100160 [2]北矿新材科技有限公司,北京102206 [3]东北大学,沈阳110819

出　　处：《热喷涂技术》2024年第2期106-112,共7页Thermal Spray Technology

摘　　要：为实现重要热端零件的循环再加工利用,以DZ125合金型高压涡轮外环块和叶片作为研究对象,针对涂层的物理化学特性以及基体的结合状态,研究化学法去除试片级热喷涂镍铬铝钇硅(NiCrAlYSi)涂层的去除效果,进行酸洗液成分和工艺研究,得到适宜的涂层去除工艺方法。对整个工艺过程中的界面状态和对基体组织的影响进行检测和评价,发现此种方法在去除了涂层后,酸洗液对于基材性能没有造成损伤,适合作为此类高温合金上NiCrAlYSi涂层去除的酸洗液。In order to realize the recycling and reprocessing of important hot-end parts,this study takes the DZ125 alloy high-pressure turbine outer ring block and blades as the research objects.Based on the physical and chemical properties of the coating and the bonding state of the substrate,the chemical method to remove the specimen-level thermal sprayed NiCrAlYSi coating was studied.In order to determine the removal effect of the coating,research on the composition and process of the pickling solution was conducted to obtain a suitable coating removal process.The interface state and the impact on the matrix structure during the entire process were detected and evaluated.It is found that after the coating is removed by this method,the pickling solution does not cause damage to the properties of the substrate and is suitable for use as a coating on such high-temperature alloys.

关 键 词：高压涡轮外环 NiCrAlYSi涂层 涂层去除 酸洗液 

分 类 号：TG174.442[金属学及工艺—金属表面处理]