Patent ID: 9545665
Date: 2017-01-17
CPC Classifications: B22D,B23K,B23P,C21C,C22C,F01D

Claim:
1. A method of repairing a defect in a ductile cast iron workpiece, comprising: machining the workpiece in an area of the defect to remove the defect and form a chamber opening at a surface of the workpiece; anchoring a receptacle to the workpiece above the chamber, wherein the receptacle is provided with an orifice in communication with the chamber; adding molten iron into the receptacle so that at least part of the molten iron flows into the chamber; adding a slagging agent into the receptacle; heating the slagging agent and the molten iron with an electrode; adding a nodulizing agent into the molten iron so as to segregate graphite; and allowing the molten iron and the workpiece to cool down slowly.