Phase Constitution, Microstructure, and Properties of Two Flame-Sprayed Ni60 Coatings with Different Carbon Contents
发布时间：2024-01-18
点击次数：
影响因子：3.1
DOI码：10.1007/s11666-023-01705-z
所属单位：中南大学粉末冶金研究院
教研室：高温结构材料研究所
发表刊物：Journal of Thermal Spray Technology
项目来源：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）
关键字：Coating materials, Carbon content, Processability, Wear resistance
摘要：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.
合写作者：Xuepeng Wang, Haibo Liu, Tao He, 陈嘉祺, Wanxiang Dai, Yong Liu
第一作者：Jian Yao
论文类型：Article
通讯作者：谭黎明, Feng Liu
学科门类：工学
一级学科：冶金
ISSN号：1059-9630
是否译文：否
发表时间：2024-01-18