Performance Comparisons of Blown Powder Laser Metal:Deposition Technologies: Current Capabilities and Future Trends
Supersonic Laser Deposition (SLD) is a new coating and fabrication process which combines the supersonic powder beam found in Cold Spray (CS) with laser heating of the deposition zone. SLD combines some advantages of CS: solid-state deposition, high build rate and the ability to deposit metals onto a range of substrates, with reduced operating costs which arise from not u-sing a gas heater and replacing helium with nitrogen as the process gas. This paper reviews the current metal deposition technology and compares their capability with the SLD approach. A system has been developed to impact metallic powder particles onto a substrate which is locally heated using a diode laser. A pyrometer and control system are used to record and maintain impact site temperature. A range of material/substrate combinations are presented including Ti, Cu, Stainless steel, and Stellite-6. In this study, 50 μm powder particles are measured to be traveling at around 400 ms? 1, and heated to temperatures between 450 ℃ and 900 ℃ when they impact the substrates. Build rates of up to 45 g min-1 were achieved.
W.QNeill A.Cockburn R.Lupoi M.Sparkes
Institute for Manufacturing, Department of Engineering, University of Cambridge
国际会议
1st International Conference on Frontiers of Laser Processing(第一届激光加工前沿国际会议 ICFL 2011)
长春
英文
6
2011-07-11（万方平台首次上网日期，不代表论文的发表时间）