锅炉受热面管的复合涂层防护技术  

PROTECTION TECHNIQUE FOR COMPOUND COATING OF BOILER HEATING TUBE

作　　者：聂铭[1] 林介东[1] 刘红文[2] 成晓玲[3] 匡同春[3] 

机构地区：[1]广东省电力试验研究所 [2]广东省电力试验研究 [3]广东工业大学实验中心

出　　处：《冶金丛刊》2004年第6期17-19,共3页Metallurgical Collections

摘　　要：针对燃煤电站锅炉受热面管磨蚀严重 ,导致泄露、爆管等事故而被迫停炉检修的情况 ,根据受热面管的形状、工况条件和使用环境状况 ,对电弧喷涂工艺以及对若干用于锅炉抗高温磨蚀的喷涂丝材所制备涂层的微观组织结构、硬度、涂层结合性能以及耐冲蚀磨损性能和高温腐蚀性能等进行了深入的研究。结果表明 ,以超音速电弧喷涂NiAl丝材作为结合底层、金属 -陶瓷材料或高Cr材料作为功能层、并辅以高温封孔的复合涂层制备技术 ,可提高锅炉运行的可靠性和经济性。In view of the situation of shutting down for reparing due to the severe erosion, leakage and tube-cracking, and in accordance with the shape、 working condition and environment of the heating tube, this article takes a profound research on the electric arc spraying coat process、 micro-structure、 hardness, coating layer characteristic made from spraying material, as well as performance of erosion-resistance and high temperature erosion-resistance. The result indicates the reliability and economic benefit of the boiler operation could be enhanced, by means of applying the ultra-sonic electric arc spraying coating NiAl as the connecting foundation, metal-ceramic material or Cr material as the function foundation, plus the compound coating making technique in high temperature hole sealing.

关 键 词：丝材 复合涂层 超音速电弧喷涂 微观组织结构 磨蚀 结合性能 金属 受热面管 锅炉运行 停炉 

分 类 号：TF71[冶金工程—钢铁冶金] TG174[金属学及工艺—金属表面处理]