I have an aerospace part currently being manufactured to a typical aerospace process plan. Three details two are Inco 718 and one is Rene 41. All three are GTAW welded to typical aerospace standard. After welding the assembly is put on an expander to bring back into drawing tolerance due to welding and maching stress up to this point. At this point the manufacturer sends the part out for a full Solution Heat Treat along with a Precipitation Hardening cycle. The part is laid down in the vacuum furnace for the heat treat, no fixturing to retain flatness or roundness of datums. What I am interested in developing is a heat treat tool to restrain or size the part during heat treat to ensure the part meets flatness and roundness requirements. Does anyone have any experience with designing such a tool? What metal would you pair with the Inconel 718/Rene 41 weldment? I have designed many other tools like this, but never for Inconel 718?
Please lend a hand if you can, I would appreciate it very much,
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