I want to arc weld together two pieces of a boken garden seat frame..which is cast iron. Does anyone know what is the best method ie which rods to use ect ect.......thanks.
2006-07-29 01:28:24 · 5 answers · asked by Anonymous in Home & Garden ➔ Maintenance & Repairs
Welding cast is difficult because of the impurities. These impurities make the weld unable to melt the base metal well, and melting the base metal is key to a good weld. The best way is to make a slight groove along the crack with an angle grinder, and fill the groove in with your weld material. This will give more surface area to the crack. The weld sort of binds to, not melts with the base material, but it is better than nothing. Bronze braising works better because the bronze gets into the pores of the cast better.
2006-07-29 01:31:10 · answer #1 · answered by Man with a plan. 4 · 8⤊ 1⤋
Most modern garden furniture is made from metal that can be welded with a rod called " DISSIMILAR " or use a rod called " CASTOLIN " very often sold in small packs of 10. When you prepare the metal for welding grind the two pieces back to 45 degrees then you have a good groove to fill with weld to give the repair plenty of strength
2006-07-29 08:39:50 · answer #2 · answered by karen464916 4 · 0⤊ 0⤋
Cast iron is very difficult to weld, because of the crystalline structure of the metal. The metal will seem to weld just fine cold, but it will crack away.
To weld it successfully you must heat both pieces to as close to red heat as is practical, weld it and cool it very slowly. You can use mild steel rod if you heat properly and pack the metal, however specialty rods such as ni-rod may be a better choice.
The alternative is brazing with brazing rod, however you still must heat cast iron and cool it slowly.
2006-07-29 08:37:02 · answer #3 · answered by fiddlesticks9 5 · 0⤊ 0⤋
You can't really weld it easily - but you CAN braze it.
It needs to be well cleaned, a brazing flux applied & heated until cherry red. Brazing rod introduced & it will FLOW over the fluxed area.
Allow to cool SLOWLY as quenching it WILL crack the cast iron.
It may also be an idea to put a small plate at the back as a 'stitch' to support the join.
2006-07-29 08:41:37 · answer #4 · answered by creviazuk 6 · 0⤊ 0⤋
They make a rod with high nickel content and it works pretty good , but I can't remember the # . It is an expensive rod . Go to a welding supply place and tell them what you are doing , I'm sure they can tell you more .
2006-07-29 08:35:15 · answer #5 · answered by litespeed2rw 6 · 0⤊ 0⤋