| HUANG Zu-feng,ZHANG Chong,TANG Qun-hua,DAI Pin-qiang,WU Bo.Effects of Annealing on the Microstructure and Hardness of Laser Cladding FeCoCrNiB High-entropy Alloy Coating[J],42(1):9-13 |
| Effects of Annealing on the Microstructure and Hardness of Laser Cladding FeCoCrNiB High-entropy Alloy Coating |
| Received:September 13, 2012 Revised:October 14, 2012 |
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| DOI： |
| KeyWord:high-entropy alloy coating laser cladding high temperature annealing |
| Author | Institution |
| HUANG Zu-feng |
College of Materials Science and Engineering, Fuzhou University, Fuzhou , China |
| ZHANG Chong |
College of Materials Science and Engineering, Fuzhou University, Fuzhou , China |
| TANG Qun-hua |
College of Materials Science and Engineering, Fuzhou University, Fuzhou , China |
| DAI Pin-qiang |
College of Materials Science and Engineering, Fuzhou University, Fuzhou , China;Department of Materials Science and Engineering, College of Fujian University of Technology, Fuzhou , China |
| WU Bo |
College of Materials Science and Engineering, Fuzhou University, Fuzhou , China |
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| Abstract: |
| FeCoCrNiB high-entropy alloy coating was prepared on the Q235 steel substrate. The coating is free of crack and pore defect, which is composed of rod-like M3B phase and fcc matrix phase. Formation mechanism of the phases was analyzed. Effects of high temperature annealing on microstructure and microhardness were investigated. The results show: after annealed at 900 ℃ and 1000 ℃ , some granular and short rod-like M3B phase are precipitated in coating; After annealed at 1150 ℃ , rod-like, granular and short rod-like structure disappear, a blocky M3B phase formes, the microhardness of blocly phase is 1188 HV; The coating exhibits excellent resistance to high temperature softening, the decrease of microhardness is only about 7 % and 9 % after annealed at 900 ℃ and 1000 ℃ . |
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