Process for making a piston and piston

摘要

The method involves subjecting the piston (10) to a melting process at least in some regions. The melting process is carried out by means of a light arc welding technique and cooling at a rate of 100 to 1000 degrees Kelvin per second is carried out after the melting process. The welding process makes use of plasma or metal inert gas or MIG welding. An independent claim is also included for the following: (a) a piston for an internal combustion engine.