Effect of Al content on high temperature erosion properties of arc-sprayed FeMnCrAl/Cr_3C_2 coatings

作     者：罗来马 刘少光 俞佳 罗娟 郦剑 

作者机构：Department of Materials Science and Engineering Zhejiang University Wenzhou Cadre New Special Material Co. Ltd. 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2010年第20卷第2期

页      面：201-206页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Project(2009C31129) supported by the Science and Technology Department of Zhejiang Province  China 

主　　题：high velocity arc spraying (HVAS) coating erosion mechanism high temperature erosion(HTE) 

摘      要：Three types of FeMnCrAl/Cr3C2 coatings with different AI content were deposited on 20# steel substrates by the high velocity arc spraying （HVAS） process. Surface microstructures of the coatings were analyzed by optical microscopy （OM） and X-ray diffractometry （XRD）. High temperature erosion （HTE） tests were performed in an erosion tester at different impact angles. The surface morphologies of the eroded coatings were observed on a field emission scanning electron microscope（FE-SEM）. The laminated structure is found on all the prepared coatings with the porosity and oxide fraction in the coatings decreasing with the Al content from 0 to 15% （mass fraction）. Sample FA3 with 15% Al, possessing the lowest porosity and oxide fraction, has the best HTE resistance, which demonstrates that Al addition can improve the HTE resistance of the coatings. The erosion rate of sample FA1 exhibits a maximum value at 90° impact angle. The maximum erosion rates of both FA2 and FA3 samples appear in the range of 60°-90° impact angles. Erosion loss of the coatings occurs through brittle breaking, cutting and fatigue spalling.