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Journal of KWJS. 2007;25(1):30-36. Published online March 26, 2007.
- Effect of Process Parameters on Laser Overlay Behavior of Fe-based Alloy Powder on Aluminum Substrate
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Yeon-Gon Yoo, Namhyun Kang, Cheol-Hee Kim, Jeong-Han Kim, Mok-Soon Kim
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- Abstract
- A joining of disimilar metal combination faces signifi cant problems such as poor strength and cracking asociated with britle intermetallic compounds (IMC) formed. An aplication of laser allows low heat input; leading to les dilution and smaller heat afected zone. The CO₂ laser overlay was conducted on an AC2B alloy with feeding Fe-based powders. The overlay area was signifi cantly influenced from the travel velocity rather than the powder f eeding rate. The interface between the overlay and substrate consisted of the hard and britle IMC (FeAl₃, Fe₃Al, Fe₂Al?), which initiating and propagating the crack. The reciprocating test for the slide wear was conducted on a multi-pas overlay experiment. Comparing with the multi-pas overlay with no overlap, the overlay with 50% overlap showed beter wear resistance.
Keywords :CO₂ laser;Clading;Fe-based powder;Al su bstrate;Crack;Overlay;Wear resistance
