It is interesting in develop beam pattern used to Kw levels laser wide cladding or alloying. Computer simulation was carried out to determine the role of beam shape in convection and heat transfer in laser melted pool. Four typical beam patterns of A mode 20 × 20mm, B mode 1 × 20mm, C mode 2 × 10mm and D mode 4 × 5mm were used. Temperature profiles and fluid flow fields, thermal cycles and solidfication rates, single pass melted widths and depths, needed laser powers were calculated with M–160 computer for four beam patterns using SIMPLE program. It is shown that linear pattern A has the capability of single pass of melted pool of large widths and shallow depths, low needed input laser power and large cooling rate, it is a good source available to Kw levels laser cladding and alloying. Square pattern B could produce large single pass melted widths and large depths, but needed power is large, it is avariable to 10–20Kw levels laser melting, alloying and cladding. Experiments on melted pool topography, the secondary dendrite arm spacings and laser power are found to be in fair agreement with theoretically calculated values.
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ICALEO '90: Proceedings of the Laser Materials Processing Conference
November 4–9, 1990
Boston, Massachusetts, USA
ISBN:
978-0-912035-42-0
PROCEEDINGS PAPER
The role of beam shape in convection and heat transfer in laser melted pool Available to Purchase
Yang Xi–Chen;
Yang Xi–Chen
1
Laser Processing Laboratory, Tianjin College of Textile Technology
Tianjin, P. R. China
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Yan Yu–He;
Yan Yu–He
1
Laser Processing Laboratory, Tianjin College of Textile Technology
Tianjin, P. R. China
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Peng Shou–Jun;
Peng Shou–Jun
2
Tianjin Computer Center
, China
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Shi Jing–Nian
Shi Jing–Nian
2
Tianjin Computer Center
, China
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Published Online:
November 01 1990
Citation
Yang Xi–Chen, Yan Yu–He, Peng Shou–Jun, Shi Jing–Nian; November 4–9, 1990. "The role of beam shape in convection and heat transfer in laser melted pool." Proceedings of the ICALEO '90: Proceedings of the Laser Materials Processing Conference. ICALEO '90: Proceedings of the Laser Materials Processing Conference. Boston, Massachusetts, USA. (pp. pp. 480-491). ASME. https://doi.org/10.2351/1.5058391
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