Anyone know if induction brazing has been attempted on these heads or the hybrid heads for the big Ford six?
When I did furnace brazing(on smaller components), the braze/flux was already added to the joints in either a strip of the correct thickness to get the gap correct or a paste with tooling to hold the gap correct. The furnace is heated to below the melting temperature of the braze and held, allowing the component temp. to normalize. Then, the furnace temperature is ramped up into the brazing temperature and allowed to soak for a set time. After, temp is dropped below the solidification temp and cooled at a set rate.
Furnace brazing is no small feat. The furnace atmosphere may need to be controlled as well. I did pretty well with tack welding components in position(proper gap & alignment) on low volume test runs to avoid tooling costs, but they weren't cast iron.
