Effect of laser power on the molten pool temprature and layer thickness at the curvature radius of thin-wall part fabricated by laser direct metal forming

  • Đoàn Tất Khoa

Abstract

To discuss the effect of laser power on the molten pool temperature and layer thickness at the curvature radius of thin-wali parts, the numerical simulation and expemncntal was studied The numerical results showed that the molten pool temperature of the thin-wall increases with the layer number, and the molten pool temperature of thin-wall cylinders were increa.sed when curv'aturc radius decreased The rules of laser power changing with the layer number and ciinuture in ilie processing of the thin-wall blade can be obtained when keeping molten pool temperature stable. According to the numerical results, the thin-wall blades were fabneated by experiments. The experimental results showed that the excessive build-up occ^uired and unevenness thickness layer at small radius ccimcr with constant laser power because of the increase of energy density at comers, while varied laser power is more Uniterm than the constant laser power, which IS in agreemeni with the numerical simulation.

điểm /   đánh giá
Published
2017-10-13
Section
Articles