Impact Factor:3.1
DOI number:10.1007/s11666-023-01705-z
Affiliation of Author(s):中南大学粉末冶金研究院
Teaching and Research Group:高温结构材料研究所
Journal:Journal of Thermal Spray Technology
Funded by:国家科学技术重大项目（J2019-IV-0003-0070）、加强基本计划技术领域基金（2021-JCJQ-JJ-1103）、CAST青年精英科学家赞助计划（2022QNRC001）、中国自然科学基金（91860105、52074366）、中国湖南省自然科学基金（2021JJ40757）、湖南省科技创新计划（2021RC3131）
Key Words:Coating materials, Carbon content, Processability, Wear resistance
Abstract:Ni60 alloy is one of the important brands of nickel-based self-fusing alloys. It is widely used in industries such as metallurgy, mining, and other fields for the repair and protection of fragile parts. However, there is little literature on the effect of C content on its properties. In this study, two Ni60 alloy coatings with different C contents prepared by flame spraying and remelting were investigated by means of XRD, SEM, EBSD, friction wear testing, thermodynamic calculation, etc. The results showed that the calculated freezing range (FR) of Ni60 decreased from 983-1165.90 degrees C to 980-1154.28 degrees C and the melting range (MR) of Ni60 decreased from 966.27-1089.28 degrees C to 958.91-1045.41 degrees C when the C content increased from 0.72 wt.% (S1) to 1.01 wt.% (S2). Besides, the Cr7C3 phase size of the Ni60 layer increased with the increase of C addition. The coating shrinks during the remelting and solidification process, and the inner pores do not have sufficient time to escape, caused by the decreased FR, leading to the generation of holes and the degradation of surface quality in S2. However, the hardness of the S2 was 66 HV higher than that of S1, and the wear resistance of the S2 coating was superior as well because of more precipitated carbides therein. This work would give a hint at balancing the processability and mechanical properties for the development of high-performance coatings.
Co-author:Xuepeng Wang, Haibo Liu, Tao He, Jiaqi Chen, Wanxiang Dai, Yong Liu
First Author:Jian Yao
Indexed by:Article
Correspondence Author:Liming Tan, Feng Liu
Discipline:Engineering
First-Level Discipline:冶金
ISSN No.:1059-9630
Translation or Not:no