VIBRATIONPROOF COMPOSITE MATERIAL

摘要

PURPOSE: To electric resistance-weld composite plates of a light structure by dispersing ferroalloy powder by a predetermined volume percentage with a predetermined grain size in the degree that the composite material is resistance- weldable to form a plastic core layer, hereby shielding a sound wave in a solid. CONSTITUTION: A vibration-resistant composite material is formed of two steel coating plates 2 and a viscoelastic plastic core layer 3 disposed between the plates 2. The layer 3 contains ferroalloy powder 4 having a grain size of 70 to 130% of a layer thickness of the plastic layer of an amount of 3 vol.% or more uniformly dispersed. The composite material formed in this manner can be electric-resistance welded to one another by welding electrodes 1.