LM is a relatively new RP process. This process has been specifically targeted at themedical sector and is currently been used to produce customised implants and jigs.Process OverviewThe workings of the process are very similar to the SLS or SLA process. In this process a high powered laser is used to melt powder metal particles and fuse them together. When the laser has fused one complete layer another fresh layer of powder is dispersed across the build chamber. The thickness of this layer can vary from a minimum of 20 to a maximum of 100 microns. The parts produced are dense metal parts and are available in materials such as tool steel, stainless steel, cobalt chrome and titanium. When reactive materials such as titanium or aluminium are being used the oxygen content within the sealed chamber must be reduced to prevent oxides forming with consequent material defects. This is achieved by charging it with a high purity argon gas.
