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Processing Window and Microstructure of NiCoCrAlY Coating Deposited on Cast Iron Using Multilayer Laser Cladding
Liu H(刘昊); Chen PJ(陈培见); Yang HF; Hao JB; Tian XH; He XL(何秀丽); Yu G(虞钢)
Source PublicationJOURNAL OF SPECTROSCOPY
2019-02-17
PagesAR9308294
ISSN2314-4920
AbstractCast iron is an iron-carbon alloy widely used in mechanical engineering. Nickel-base or cobalt-base alloy coatings prepared by laser cladding can improve the surface properties of cast iron, thereby increasing the service life of the components; however, due to the poor weldability and high carbon content of cast iron, the use of laser cladding to prepare alloy coatings faces many difficulties. To reduce the brittleness of the bonded interface, laser cladding was applied to the surface of cast iron using a multilayer deposition strategy. Through testing of the single-track laser cladding, the causes of defects in the coating are analysed, including poor bonding, slag inclusions, and pores. An analytical model based on mass and heat conservation is developed, and a processing window of laser tracks without defects is determined thereby. NiCoCrAlY alloy coating prepared by overlapping laser tracks mainly consists of -(Fe, Ni) dendrites and interdendritic M7C3 and M23C6 carbides. Although there are no cracks in a single laser track, cracks are detected when laser tracks are overlapped under the same process parameters. The increase in laser power helps to reduce cracking susceptibility on this occasion. The morphology of the grain in NiCoCrAlY alloy coating is mainly epitaxially grown columnar crystals. The increase in microhardness of the coating is mainly attributed to ductile dendrites, precipitated carbides, and grain refinement.
DOI10.1155/2019/9308294
Indexed BySCI ; EI
Language英语
WOS IDWOS:000460252700001
WOS KeywordDUCTILE IRON ; WEAR-RESISTANCE ; BEHAVIOR ; ALLOY ; STRESS
WOS Research AreaBiochemical Research Methods ; Spectroscopy
WOS SubjectBiochemistry & Molecular Biology ; Spectroscopy
Funding OrganizationNatural Science Foundation of Jiangsu Province [BK20160258] ; China Postdoctoral Science Foundation [2015M581881] ; Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
ClassificationQ3
Ranking5+
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78496
Collection先进制造工艺力学重点实验室
Affiliation1.{Liu, Hao、Yang, Haifeng、Hao, Jingbin、Tian, Xianhua} China Univ Min & Technol, Sch Mech & Elect Engn, Xuzhou, Jiangsu, Peoples R China
2.{Liu, Hao} China Univ Min & Technol, Jiangsu Key Lab Mine Mech & Elect Equipment, Xuzhou, Jiangsu, Peoples R China
3.{Chen, Peijian} China Univ Min & Technol, Sch Mech & Civil Engn, Xuzhou, Jiangsu, Peoples R China
4.{He, Xiuli、Yu, Gang} Chinese Acad Sci, Inst Mech, Key Lab Mech Adv Mfg, Beijing, Peoples R China
5.{He, Xiuli、Yu, Gang} Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Liu H,Chen PJ,Yang HF,et al. Processing Window and Microstructure of NiCoCrAlY Coating Deposited on Cast Iron Using Multilayer Laser Cladding[J]. JOURNAL OF SPECTROSCOPY,2019:AR9308294.
APA 刘昊.,陈培见.,Yang HF.,Hao JB.,Tian XH.,...&虞钢.(2019).Processing Window and Microstructure of NiCoCrAlY Coating Deposited on Cast Iron Using Multilayer Laser Cladding.JOURNAL OF SPECTROSCOPY,AR9308294.
MLA 刘昊,et al."Processing Window and Microstructure of NiCoCrAlY Coating Deposited on Cast Iron Using Multilayer Laser Cladding".JOURNAL OF SPECTROSCOPY (2019):AR9308294.
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