Based on practical production

effects of pre-treatment of wear resistant ring

quality of liquid Al alloy

operation programs of the worker on the bonding quality of wear resistant ring in the piston were analyzed. After pre-treatment for wear resistant ring

on the one hand

cleanness of the wear resistant ring should be ensured

on the other hand

storage time should be strictly controlled to prevent erosion from the wear resistant ring. During production process

time of infiltrated-liquid aluminum alloy should be rationally controlled to avoid high Fe content and gas content in the liquid alloy influencing bonding quality of wear resistant ring. Before putting in or taking out wear resistant ring from the liquid Al alloy

oxidized film on working region of wear resistant ring should be cut to avoid oxide film adhering surface to form black oxide film defects. In addition

skills of worker should be improved to shorten transferring time of wear resistant ring

which could decrease the bonding defects of alloy. Based on above methods

the programs were set standard and strictly implemented

effectively decreasing scrap rate of the castings.