Selective Laser Melting Process of Fe-Ni Metal Powder

The density of the SLM forming parts is investigated to determine the good technological parameters of SLM at the same time obtain the dense parts. In the SLM experiment, material used is Fe-Ni metal powder, the good technological parameters of SLM are determined by analyzing the effect of the laser electric current, the laser pulse width, the pulse of laser light frequency, the scan speed, the scan interval, push powder thickness and the scanning way on the single channel scanning, the single-layer scanning, which can lay the foundation for afterward block body formation. Microstructure and properties of the block specimen prepared under the different SLM process parameter are studied by the density measurement and the scanning electronic microscope analysis. The forming parts with high density have been prepared under the optimal SLM process parameters.