Joined: Jan 2010
Posts: 9,809
Likes: 1,784
From: Northern California
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
The surfaces now have to be prepared with abrasives and with flux before re-brazing can be done, so you have to get the parts completely separated first.
I'm not sure if the order of operations now will be optimum, since the fork blades are now brazed in. But a framebuilder can fixture everything to allow the steerer to be brazed in. Paint around the crown will of course will be gone when all is done, so probably easier to find a replacement fork at this point.
The steerer should still be strong after the repair.
This is a ~1973 Raleigh, right?