Electroslag Welding of Cast Iron

概要

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A new electroslag welding of cast iron plates using a consumable electroslag welder is discussed. Uses of a mild steel wire, a silicon-containing wire, a cored wire containing white cast iron or gray cast iron powder and a cast iron rod are compared. Major results obtained are as follows : 1) Welding with a mild steel wire is easy to execute but results in an extremely hard weld metal which is difficult to machine. 2) Use of a high silicon wire produces a considerably less hard weld metal than that of a mild steel wire, but the results are not fully satisfactory. 3) Use of a cored wire with a graphite nozzle gives the best results with the hardness, tensile strength, color tone and damping factor of weld metal about the same as those of base metal. 4) Use of a castiron rod is useful in welding a short length job. 5) About fluxes experimentally prepared with the aim to obtain a lower temperature fusible flux, the behavior during welding, properties of weld metal and physical properties of molten slag have been checked ; and it has been confirmed that a certain flux is suitable for electroslag welding of cast iron.
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