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Microstructural and Mechanical Properties of a NiCoCrAlY Coating Prepared by Laser Cladding on a Compacted Graphite Cast Iron Surface
Liu, H.; Yu G(虞钢); He XL(何秀丽); Yang, H. F.; Han, Z. T.; Yang, HF (reprint author), China Univ Min & Technol, Sch Mech & Elect Engn, Xuzhou 221116, Jiangsu, Peoples R China.
Source PublicationLASERS IN ENGINEERING
2017
Volume37Issue:4-6Pages:273-289
ISSN0898-1507
AbstractLaser cladding with synchronous powder feeding on the surface of compacted graphite cast iron (CGCI) was conducted using NiCoCrAlY powder in this research, with the aim of obtaining coatings mainly consisting of directional columnar crystals in the microstructure. A metallographic microscope, scanning electron microscope (SEM), X-ray diffractometer (XRD), and Vickers hardness tester were used to analyse the dilution rate, bonding properties, microstructure, and microhardness of the coating. The research results showed that: the alloy coating mainly consisted of the dendrites of gamma(Fe, Ni) and the carbide phases of Cr7C3 and Cr23C6 between grain boundaries. Meanwhile, it was discovered that the powder feed rate can significantly influence the crystalline state within the coating: with increasing powder feed rate, the microstructure of the coating was gradually converted from dendrites with poor directivity to columnar crystals with strong directivity, and the average microhardness was reduced owning to the decrease of the amount of Cr7C3 and Cr23C6 phases.
KeywordNd:Yag Laser Compacted Graphite Cast Iron (Cgci) Nicocraly Powder Laser Cladding Columnar Ctystal Growth Boa Rang Interface Microhardness Powder Feed Rate
Indexed BySCI ; EI
Language英语
WOS IDWOS:000406998700007
WOS KeywordSUPERALLOY SINGLE-CRYSTALS ; DEPOSITION ; TEMPERATURE ; RESISTANCE ; EVOLUTION ; GROWTH
WOS Research AreaMaterials Science ; Optics
WOS SubjectMaterials Science, Multidisciplinary ; Optics
Funding OrganizationPriority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) ; Discipline Research Initiative of CUMT(2015XKQY12)
DepartmentMAM激光智能制造工艺力学
ClassificationQ4
Ranking1
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/70035
Collection先进制造工艺力学重点实验室
Corresponding AuthorYang, HF (reprint author), China Univ Min & Technol, Sch Mech & Elect Engn, Xuzhou 221116, Jiangsu, Peoples R China.
Recommended Citation
GB/T 7714
Liu, H.,Yu G,He XL,et al. Microstructural and Mechanical Properties of a NiCoCrAlY Coating Prepared by Laser Cladding on a Compacted Graphite Cast Iron Surface[J]. LASERS IN ENGINEERING,2017,37(4-6):273-289.
APA Liu, H.,虞钢,何秀丽,Yang, H. F.,Han, Z. T.,&Yang, HF .(2017).Microstructural and Mechanical Properties of a NiCoCrAlY Coating Prepared by Laser Cladding on a Compacted Graphite Cast Iron Surface.LASERS IN ENGINEERING,37(4-6),273-289.
MLA Liu, H.,et al."Microstructural and Mechanical Properties of a NiCoCrAlY Coating Prepared by Laser Cladding on a Compacted Graphite Cast Iron Surface".LASERS IN ENGINEERING 37.4-6(2017):273-289.
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