Research On The Machining Technology For The Laser Cladding Of Titaniumalloy

Compared with other repairing technology, laser cladding of titanium has various advantages, and it is widely applied in many fields, such as air, sea and aerospace. However, cracks in the coatings confine the development of laser cladding in the industry. Thus, this paper focuses on the research about the influence of process parameters on laser cladding of titanium by the methods of simulation and experiment. The numerical and experimental results provide the theoretical guidance for the optimization of parameters in the laser cladding on Ti-6Al-4V alloy.By using finite element method, model of single-channel cladding of Ti-6Al-4V alloy was built. This model encompasses the effects of the temperature-dependent thermal conduction and radiation as well as the latent heat of fusion. The temperature and stress fields of laser cladding were calculated under different process parameters.The effect of process parameters to the temperature and stress of claddings were discussed by using the single factor and orthogonal experiment method. Besides, stresses of coatings with three different scanning paths were presented and compared. Ti-6Al-4V laser cladding experiments were performed using orthogonal experiment method. The real time temperature was measured and the topography of claddings were analyzed and contrasted.