Patent ID: 9694450
Date: 2017-07-04
CPC Classifications: B23K,B23P,C21D,C22F,F02F

Claim:
1. A method for manufacturing a piston with a re-molten reinforced combustion chamber throat, wherein the material of the piston is an aluminum alloy or a magnesium alloy, and the method comprises: a) roughly machining a piston, wherein a combustion chamber throat and a combustion chamber bottom of the piston are weakest parts of the piston, and machining allowances of the combustion chamber throat and the combustion chamber bottom range from 1 mm to 3 mm; b) washing and degreasing the piston; c) coating or spraying a surfactant on the combustion chamber throat and the combustion chamber bottom to be re-molten, wherein, d) re-melting the piston by A-TIG (Argon arc welding); and e) processing the piston into a finished product after the re-melting.