The Box-Behnken response surface analysis method was used to optimize the surface morphology of the laser tailor-welding.The four factors

welding voltage

pulse frequency

pulse width

speed of welding

were selected for experimental design. The secondary response surface model was obtained. The response surface analysis show that the welding pressure and pulse frequency have a great influence on the morphology of the weld

followed by the welding speed and pulse width. Through optimization

it is found that when the welding voltage

pulse frequency

pulse width and welding speed are 265.42 V

19.65 Hz

10.22 ms

and 321.26 mm/min

respectively

the weld morphology is best. Moreover

the F value is 5.51 obtained by the model variance

indicating that the quadratic equation is significant. The model fitted well in the entire regression region

which could be used to analyze and predict the process of the weld morphology. Through the experimental comparison and analysis

it is found that the welding morphology

microstructure and hardness values are better under the optimal process parameters.