We have an application where we need to form a small Inconel X750 corrugated assembly to be a very precise height (.00025" repeatability or better).
The corrugations are basically .005" thick foil formed into 1" long x 0.5" wide corrugations about .025" tall, with a 0.1" pitch. These are then spot-welded to a base foil at the ends. We need to have the .025" height be very, very repeatable, even with small variations in stock material thickness, etc.
One idea we have been talking about is to form the corrugations in the annealed state, but make them slightly too tall. Then spot-weld them onto the assembly. Then put the assembly into a heat treating fixture that is a precise height. We then solution anneal in the fixture, followed by precipitation heat treatment (or just use the X750 "triple" heat treatment).
Any thoughts?
Thanks,
Erik
The corrugations are basically .005" thick foil formed into 1" long x 0.5" wide corrugations about .025" tall, with a 0.1" pitch. These are then spot-welded to a base foil at the ends. We need to have the .025" height be very, very repeatable, even with small variations in stock material thickness, etc.
One idea we have been talking about is to form the corrugations in the annealed state, but make them slightly too tall. Then spot-weld them onto the assembly. Then put the assembly into a heat treating fixture that is a precise height. We then solution anneal in the fixture, followed by precipitation heat treatment (or just use the X750 "triple" heat treatment).
Any thoughts?
Thanks,
Erik
