With indefatigable ardency disputes on whether it is possible to make cast iron continue? Such welding will be how reliable? Experience of inquisitive and persistent "samodelkiny" shows that to eliminate a crack in a cauldron, to repair oven grid-irons by means of gas or electric welding quite perhaps.
It is required to you
- Gas burner or electric welding machine, additive bars, electrodes.
Instruction
1. Use gas welding – one of the most reliable ways of welding of cast iron. Gas welding allows to receive the built-up metal the closest on the properties to the basic. A message gas welding of cast iron is better with preliminary heating. Previously clean edges of the welded material from rust and dirt with a metal brush, remove all traces of oil. As additive bars use pig-iron cores 40 — 70 cm long. Diameter of a bar has to be equal to a half of thickness of base metal.
2. It is possible white, malleable. You will be able to receive the best results if you use CCh brand electrodes – 4 with karbidoobrazuyushchy elements in a covering (to 70% of vanadium). At first build up facing rollers electrodes with a diameter of 3 mm, current 65 - 80A. Conduct welding with breaks that the detail did not get warm higher than +100 degrees of Page. After that impose a seam electrodes of large diameter, at the same time also without allowing a detail to overheat.
3. If there are no special electrodes, take a usual electrode for welding staly, wind it with a copper wire and you cook as usual. Previously the detail is better to warm up up to +400 degrees in the furnace. Upon termination of works cool the welded detail together with the oven. In this case there will be no cracks and tension.
4. Still a way - welding on hairpins. From sides along the line of a seam drill openings, cut in them a carving and screw hairpins from low-carbon steel. At first scald all hairpins separately, then weld them among themselves. After that impose facing seams. Conduct welding with breaks, without allowing overheating of a detail.