In order to investigate the relationship between the interface response and wear behavior under low impact velocity,multi-cycle low velocity impact wear experiments were carried out.The effect of impact velocity on the mechanical response of the contact interface was studied by analyzing the peak value of contact force,contact duration,contact force impulse and kinetic energy dissipation during the impact process.The effect of impact velocity on the wear damage behavior of the contact interface was studied by measuring and analyzing the wear profile,morphology and wear volume of impact wear marks,as well as the change of element composition in the wear mark area.Results show that the contact interface is subjected to stronger mechanical effects in a shorter time with the increase of impact velocity.The energy absorption rate is insensitive to the change of impact velocity.While the increase of the impact velocity will lead to the gradual reduction of wear damage caused by unit energy.Impact wear scars can be divided into two areas with plastic deformation and delamination wear as the main damage forms,respectively.The wear zone experiences severe tribo-oxidation,and the impact-pair material transfer occurs with the increase of impact velocity.Therefore,the higher the impact velocity,the more intense the friction between the contact interfaces.And the formed surface oxide layer avoids the direct contact between the impact-pair and the substrate material,which delays the further development of wear damage.