Characterization of laser powder micro-deposition of thin StelliteF wall
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1.
Research Center for Non-ferrous Metals Composites, General Research Institute for Non-ferrous Metals, Beijing 100088, China;
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2.
Departamento de Engenharia de Materiais, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
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Received Date:
2005-09-13
Accepted Date:
2006-04-21
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Abstract
For laser powder micro-deposition process,the bonding between the deposited materials and the substrates is crucial to the quality of the deposited components.In order to fabricate fine thin parts with uniform thickness and good bonding strength directly,the effect of processing parameters on wall thickness uniformity and stability of the process during laser micro-deposition of metallic powder from StelliteF alloy is investigated experimentally.The observation and analysis of the cross-section and the microstructure of the deposited thin walls indicate that,the change of heat dissipation condition during deposition influences the wall thickness uniformity.Under reasonable processing parameters,thin wall parts with surface roughness(Ra) as low as 10μm,the wall thickness as thin as 0.4mm and metallurgically sound structure can be deposited directly.It indicates that laser micro-deposition of metallic powder has a bright prospect in laser surface modification of small parts and direct fabrication of fine and precise components.
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References
|
[1]
|
ABBOTT D H,ARCELLA F G.Laser forming titanium components[J].Advanced Materials Processes,1998,152(5):29～30. |
|
[2]
|
SCHWENDNER K I,BANERJEE R,COLLINS P C et al.Direct laser deposition of alloys from elemental powder blends[J].Scripta Materialia,2001,45(10):1123～1129. |
|
[3]
|
LEWIS G K,SCHLIENGER E.Practical considerations and capabilities for laser assisted direct metal deposition[J].Materials Design,2000,21 (4):417～423. |
|
[4]
|
WU X,LIANG J,MEI J et al.Microstructures of laser-deposited Ti6Al-4V[J].Materials Design,2004,25(2):137～144. |
|
[5]
|
CHOI J,CHANG Y.Characteristics of laser aided direct metal/material deposition process for tool steel[J].International Journal of Machine Tools and Manufacture,2005,45 (4～5):597～607. |
|
[6]
|
KEICHE D M,SMUGERESKY J E.The laser forming of metallic components using particulates materials[J].Journal of Metals,1997,49(5):51～54. |
|
[7]
|
ARCELLA F G,FROES F H.Producing titanium aerospace components from powder using laser forming[J].Journal of Metals,2000,52(5):28～30. |
|
[8]
|
KOBRYN P A,MOORE E H,SEMIATIN S L.The effect of laser power and traverse speed on microstructure,porosity,and build height in laser-deposited Ti-6Al-4V[J].Scripta Materialia,2000,43 (4):299～305. |
|
[9]
|
PINKERTON A J,LI L.The significance of deposition point standoff variations in multiple-layer coaxial laser cladding[J].International Journal of Machine Tool and Manufacture,2004,44 (6):573～584. |
|
[10]
|
MAZUMDER J,DUTTA D,KUKUCHI N et al.Closed loop direct metal deposition:art to part[J].Optics and Lasers in Engineering,2000,34(4～6):397～414. |
|
[11]
|
HUD M,KOVACEVIC R.Sensing,modeling and control for laserbased additive manufacturing[J].International Journal of Machine Tools and Manufacture,2003,43 (1):51～60. |
|
[12]
|
LI X Y,QI X J,ZENG X Y.Establishment and application of temperature field model in laser micro-cladding[J].Laser Technology,2005,29(6):561～564(in Chinese). |
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