火焰喷镀和 PTA 沉积镍基自流变合金涂层的微观结构分析

IF 2.4 4区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Welding in the World Pub Date : 2024-07-24 DOI:10.1007/s40194-024-01814-5
Ivan Vidaković, Katica Šimunović, Goran Heffer, Vedrana Špada
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引用次数: 0

摘要

本文介绍了通过火焰喷涂同时熔化和等离子传输弧(PTA)工艺在 42CrMo4 前淬火和回火(QT)钢基体上沉积的镍基自熔合金 NiCrBSi、NiCrBSi-WC 和 NiBSiWC 的微观结构分析结果,包括光学显微镜、扫描电子显微镜与能量色散光谱仪和 X 射线衍射分析。通过上述微观结构分析,确定了所研究涂层的微观结构特征,尤其是涂层/基体界面的微观结构特征,以及喷涂和焊接技术对钢基体的影响。分析表明涂层/基材界面的微观结构发生了变化。具体来说,观察到了某些化学元素(碳和铁)从涂层向基体以及从基体向涂层的扩散特性。此外,分析还确定了涂层中存在的新相,这些新相是上述扩散以及与涂层中的化学元素发生反应的结果。化学元素的扩散在涂层/基底界面区域最为明显,而在远离该区域的地方则有所减少。
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Microstructural analysis of flame-sprayed and PTA-deposited nickel-based self-fluxing alloy coatings

In this paper, the results of microstructural analyses, including optical microscopy, scanning electron microscopy with energy dispersive spectroscopy and X-ray diffraction analysis, of the Ni-based self-fluxing alloys NiCrBSi, NiCrBSi–WC, and NiBSi–WC deposited on a previously quenched and tempered (QT) steel substrate 42CrMo4 by flame spraying with simultaneous fusing and plasma transferred arc (PTA) process are presented. The aforementioned microstructural analysis was carried out to determine the microstructural characteristics of the investigated coatings, especially at the coating/substrate interface, and the influences of the spraying and welding technology on the steel substrate. The analysis revealed a change in the microstructure of the coating/substrate interface. Specifically, the diffusion characteristics of certain chemical elements (carbon and iron) from the coating to the substrate and from the substrate to the coating were observed. Additionally, the analysis established the existence of new phases within the coating that arose as a result of the aforementioned diffusion and reaction with chemical elements from the coating. The diffusion of chemical elements was most pronounced in the area of the coating/substrate interface, while it decreased away from this area.

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来源期刊
Welding in the World
Welding in the World METALLURGY & METALLURGICAL ENGINEERING-
CiteScore
4.20
自引率
14.30%
发文量
181
审稿时长
6-12 weeks
期刊介绍: The journal Welding in the World publishes authoritative papers on every aspect of materials joining, including welding, brazing, soldering, cutting, thermal spraying and allied joining and fabrication techniques.
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