Comparative study of stainless steel AISI 431 coatings prepared by extreme-high-speed and conventional laser cladding
| Autor: | Faming Shen, Y. Zhou, Liqun Li, Tao Wang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Cladding (metalworking) Materials science Biomedical Engineering 02 engineering and technology 021001 nanoscience & nanotechnology Electrochemistry Microstructure 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Corrosion Cooling rate 0103 physical sciences Composite material 0210 nano-technology Instrumentation |
| Zdroj: | Journal of Laser Applications. 31:042009 |
| ISSN: | 1938-1387 1042-346X |
| DOI: | 10.2351/1.5094378 |
| Popis: | High quality 431 steel coatings were prepared on a 27SiMn substrate by extreme-high-speed laser cladding (EHLA) and conventional laser cladding (CLA), respectively. The cladding speed of the EHLA process was 150 m/min, and the surface rate could reach up to 1.14 m2/h, which is four times higher than that of the CLA process. The microstructure of the coatings was investigated in detail. The microstructure of both coatings was dominated by dendrites. Benefitting from the ultrahigh cooling rate, the dendrites of EHLA coatings were more refined than that of CLA coatings. The element distribution between dendrites and interdendritic regions was more uniform. The corrosion resistance was evaluated by electrochemical tests. The results indicated that the EHLA coatings performed better corrosion resistance due to the fine uniform microstructure. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|