SURFACE REINFORCING METHOD FOR VEHICLE PARTS TO OBTAIN HIGH MECHANICAL PROPERTIES AND A PART REINFORCED BY THE SAME

摘要

PURPOSE: A surface reinforcing method for vehicle parts and a part reinforced by the same are provided to obtain high mechanical properties for satisfying durability of vehicle parts.;CONSTITUTION: A surface reinforcing method for vehicle parts comprises a casting step(S10), a laser remelting step(S20), and a machining step(S30). In the laser remelting step, a laser beam is projected at a constant propagation speed from a predetermined distance to a specified portion of a cast part so that the surface of the specified portion is remelted and rapidly hardened. In the remelting step, a fiber laser with high output of 4.5 KW or greater is used and the output, propagation speed, and projection distance of the laser are controlled to obtain a remelting depth of 2mm or greater and a remelting width of 3mm or greater.;COPYRIGHT KIPO 2013;[Reference numerals] (AA) Completion of part; (S10) Casting part; (S20) Laser remelting; (S30) Machining