新型超音速电弧喷涂锅炉水冷壁防护涂层

doi:10.13251/j.issn.0254-6051.2020.04.039

金属热处理 ›› 2020, Vol. 45 ›› Issue (4): 183-187.DOI: 10.13251/j.issn.0254-6051.2020.04.039

新型超音速电弧喷涂锅炉水冷壁防护涂层

蒙殿武¹, 张建堂¹, 沈楠¹, 胡学飞^2,3, 陆雨⁴, 杜晓东⁴

1. 江苏大唐国际吕四港发电有限责任公司, 江苏南通 226246;
2. 大唐锅炉压力容器检验中心有限公司, 安徽合肥 230088;
3. 中国大唐集团科学技术研究院有限公司华东电力试验研究院, 安徽合肥 230088;
4. 合肥工业大学材料学院, 安徽合肥 230009

收稿日期:2019-10-05 出版日期:2020-04-25 发布日期:2020-05-08
通讯作者: 杜晓东,教授,博士生导师,E-mail:hfutdxd@126.com
作者简介:蒙殿武(1969—),男,工程师,主要从事电厂金属材料防护研究,E-mail:1678073477@qq.com
基金资助:
大唐电力集团科技项目专项资金项目(ZXZB-2015-009);大唐电力集团科技项目(P-XJ-19-00069254)

New supersonic arc spraying coating for boiler water wall protection

Meng Dianwu¹, Zhang Jiantang¹, Shen Nan¹, Hu Xuefei^2,3, Lu Yu⁴, Du Xiaodong⁴

1. Jiangsu Datang Internationgal Lvsigang Power Generation Co., Ltd., Nantong Jiangsu 226246, China;
2. Datang Boiler and Pressure Vessel Inspection Center Co., Ltd., Hefei Anhui 230088, China;
3. East China Branch, China Datang Corporation Science and Technology Research Institute Co., Ltd., Hefei Anhui 230088, China;
4. School of Materials Science and Engineering, Hefei University of Technology, Hefei Anhui 230009, China

Received:2019-10-05 Online:2020-04-25 Published:2020-05-08

摘要/Abstract

摘要： 为获得火电厂锅炉运行工况下具有较高寿命的的水冷壁防护涂层,在已有涂层成分的基础上自行设计制作了一种新型防护涂层。采用超音速电弧喷涂的方式,在Q235钢基体上制备了自研FeCrNiBSi涂层和FeCrNi两种涂层。对两种涂层进行耐高温腐蚀性能试验,并通过光学显微镜、扫描电镜、X射线衍射仪等手段对涂层在熔盐环境下腐蚀前、后的表面形貌和腐蚀机理进行研究。结果表明,FeCrNiBSi涂层较之FeCrNi涂层具有更好的抗高温腐蚀性能和更高的表面硬度,硬度高使得涂层耐粉尘冲蚀性好,从而更适合于做火电厂锅炉水冷壁防护涂层。

关键词: 锅炉水冷壁, 高温腐蚀, 孔隙率, 超音速电弧喷涂

Abstract: In order to obtain a water wall protective coating with high service life under the operating conditions of thermal power plant boilers, a new developed coating was designed and manufactured on the basis of referring to the composition of existing coating. The developed FeCrNiBSi coatings and FeCrNi coating were prepared on Q235 steel by supersonic arc spraying. The high temperature corrosion resistance test of the two coatings were carried out respectively. The surface morphology and corrosion mechanism of the coatings before and after corrosion in molten salt environment were studied by means of metallographic microscope, scanning electron microscope and X-ray diffraction. The results show that the developed FeCrNiBSi coatings have better high temperature corrosion resistance and higher surface hardness than the FeCrNi coatings, and are more suitable for the protection coatings of boiler water wall in thermal power plants.

Key words: boiler water wall, high temperature corrosion, porosity, supersonic arc spraying

中图分类号:

TG174.4

蒙殿武, 张建堂, 沈楠, 胡学飞, 陆雨, 杜晓东. 新型超音速电弧喷涂锅炉水冷壁防护涂层[J]. 金属热处理, 2020, 45(4): 183-187.

Meng Dianwu, Zhang Jiantang, Shen Nan, Hu Xuefei, Lu Yu, Du Xiaodong. New supersonic arc spraying coating for boiler water wall protection[J]. Heat Treatment of Metals, 2020, 45(4): 183-187.

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新型超音速电弧喷涂锅炉水冷壁防护涂层

New supersonic arc spraying coating for boiler water wall protection

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