weld repair chaplet in cast iron/ductile iron
weld repair chaplet in cast iron/ductile iron
(OP)
we are having some big castings made in ductile iron. To support some large internal cores the foundry prefers to use steel "chaplets" that pass thru the casting wall and protrude to the inside and outside. The chaplets are ground off and weld repairs are made. Welding this material has sometimes proven difficult without cracking, and even when the welds are sound the effect on metallurgy is always suspect. The operating stress is completley unknown, so objecting to welding on that level lacks teeth (as does NOT objecting).
Is there some other method of core support?
Is there some other method of core support?





RE: weld repair chaplet in cast iron/ductile iron
Finally, there are some foundries that weld ductile iron on a regular basis (from what I have read this requires very close control over the DI chemistry) - you may want to find one and move your operation there for this part. We have a local foundry that welds their ductile iron on a regular basis, and with ordinary steel wire MIG...I tried to find out how they do it, but they keep their cards very close to their vests. If only they were small enough to do some of our more "special" designs.
RE: weld repair chaplet in cast iron/ductile iron
RE: weld repair chaplet in cast iron/ductile iron
Is the core simply supported or cantilever type.
Can you make the core print deeper to anchor the core well.
Are reinforcement rods able to support the core.
Have you changed the core binder to obtain higher strengths and finally
Have you tried shaped graphite blocks as chaplets ?
I'm just one step away from being rich, all I need now is money.
( read somewhere on the internet)
RE: weld repair chaplet in cast iron/ductile iron
Dan T