Effect of vacuum heat treatment on microstructure and corrosion behavior of HVOF sprayed AICoCrFeNiCu high entropy alloy
作者机构：School of Engineering and TechnologyChina University of Geosciences(Beijing)Beijing 100083China School of Materials Science and EngineeringJiangsu University of Science and TechnologyZhenjiang 212100JiangsuChina Zhengzhou InstituteChina University of Geosciences(Beijing)Zhengzhou 451283HenanChina College of Material Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001HeilongjiangChina Department of Mechanical EngineeringImperial College LondonLondon SW72AZUK National Key Lab for RemanufacturingAcademy of Armored Forces EngineeringBeijing 100072China
出 版 物：《Journal of Iron and Steel Research International》 (J. Iron Steel Res. Int.)
年 卷 期：2023年第30卷第8期
页 面：1550-1561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）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化]
基 金：supported by the National Key R&D Program of China(Grant No.2022YFB3706600) the National Natural Science Foundation of China(Grant Nos.52175196 and 52275218) the Fundamental Research Funds for Central Universities(Grant No.265QZ2021008)
主 题：High velocity oxygen fuel AICoCrFeNiCu high entropy alloy coating Vacuum heat treatment Microstructure Corrosion
摘 要：To improve the corrosion resistance of coalbed methane drilling equipment,an AICoCrFeNiCu high entropy alloy coating was prepared on the AISI 4135(35CrMo)steel substrate by high velocity oxygen fuel(HVOF)technology,and the coating was subjected to vacuum heat treatment(VHT)at different temperatures(500,700,900 and 1100℃).The corrosion test of the substrate and the coatings after VHT in coalbed methane drilling fluid was carried *** results show that the HVOF sprayed AICoCrFeNiCu high entropy alloy(HEA)coating has a good bonding with the substrate,and the porosity of the coating is about 2.4%.There is partial segregation in the coating,and the coating mainly consists of body-centered cubic *** coating has good thermal stability,and the phase structure and microstructure of the coatings have changed after VHT at different *** with the substrate,the as-sprayed coating has better uniform corrosion resistance,and the corrosion resistance of the coating after VHT is further *** VHT at 500℃,the HVOF-sprayed AICoCrFeNiCu HEA coating has the best corrosion resistance.
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