Numerical Simulation Of Deformation Of Steel Plate By Laser Scanning And Two-component Powder Prepared By Laser Ignition Induced SHS

In this paper, laser scanning experiments of 65Mn steel plate and laser ignition induced SHS are carried out. The experimental process is simulated by using the finite element analysis software ANSYS. The main contents are as follows:(1)Laser scanning experiments are carried out according to different processing parameters. Measure the deformation of steel plate after laser scanning. Through analysis of the laser scanning process of 65Mn steel plate, the heat transfer model has been established. By using the ANSYS finite element analysis software, numerical simulation is carried out on the laser scanning process of 65Mn steel plate. It gets the influence law of different process parameters on temperature field and strain field after scanning. The results show:When the scanning speed reduces and the power increases, the temperature of the steel plat rises faster, and the temperature gradient is greater, deformation quantity is bigger. The results show that the simulation results are consistent with the experimental results.(2) Ni powder and Al powder are evenly mixed according to the atomic ratio of 3:1. The mixed powders are pressed into the blank. Ni-Al alloy is prepared by laser ignition induced SHS. It analyses microstructure and phrase compositions of the sintering alloy. The product phase of top surface is Ni3Al, and the tissues of the sintered alloy appear network and cellular. The product phase of median surface is Ni3Al and NiAl, and the tissues of the sintered alloy are network and acicular, some regions are cellular. The product phase of lower surface is NiAl, and the tissues of the sintered alloy appear flake. The numerical simulation results show that the highest temperature is 1345K at the top surface, and the lowest temperature is 1032K at the lower surface. The temperature of median surface is 1137K.Through analysis of the thermodynamic characters of Ni-Al laser ignition induced SHS, it gets product phase of every surfaces. The results are consistent with the XRD.(3) Fe powder and Al powder are evenly mixed according to the atomic ratio of 2:3. The mixed powders are pressed into the blank. Fe-Al alloy is prepared by laser ignition induced SHS. It analyses microstructure and phrase compositions of the sintering alloy. The product phase of top surface is FeAl, and the tissues of the sintered alloy appear strip. The product phase of median surface is FeAl and Fe3Al, and the tissues of the sintered alloy appear strip. The product phase of lower surface is Fe3Al, and the tissues of the sintered alloy appear cellular. The numerical simulation results show that the highest temperature is 1150K at the top surface, and the lowest temperature is 820.979K at the lower surface. The temperature of median surface is 894.033K. Through analysis of the thermodynamic characters of Fe-Al laser ignition induced SHS, it gets product phase of every surfaces. The results are consistent with the XRD.