Study On The Key Technology In High-frequency Strengthening Processing Ofautomobile Impact Beams

It is often installed side-door impact beams to improve the vehicle safety. The impact beams are used to absorb the energy which generated between cars in front-to-side crashes and reduce the deformation degree of the side doors to protect the passengers in the cars. The mechanical properties of impact beams which are made of high-strength steel are always improved by induction hardening which has many advantages, such as faster heating rate , easier controlled and environmentally friendlier. Also, induction hardening is a complex process and it can offer guidance for practical production to research the factors which affect the temperature of the beams.Basis on the theory of the numerical simulation, the principle of the coupled electromagnetic-thermal analysis is proved by numerical simulation of the process of the induction hardening of the impact beams. It is proved that the permeability of introduction heating is an advantage method than others. The influencing regularities of temperature field is researched by changing the value of the factors which affect the process of induction hardening,such as power supply frequency, the electric current , the speed of the impact beams, etc. Also, the optimum process parameters of the factors are obtained by simulation.After got the work pieces by induction hardening in actual production, the side-door impact beams are tensile tested and observe the metallographic phase of the work pieces. It is proved that the results of the experiment are agreed with the simulation results. So it could improve the quality of the impact beams and improve the efficiency of the process with the optimum process parameters.