How to heat treat to make sure the metal stays straight as an arrow.

J

JZknives

Joined
Feb 7, 2013
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204
I have a question. If I was to heat treat something that was going to fit into a long machined (square/rectangle) slot. How would i make sure the peice in question stays so straight that minimal or (if possible) no sanding / grinding would be required to make it fit?
 
Warp free heat treating depends on the piece being stress free beforehand, then
heated evenly. and cooled (quenched) evenly.
 
Sub critical anneal on received steel, 1200 F ,2 hours. Grind etc , 2 hour subcritical anneal. Straighten after anneal if necessary. Quench eveny, agitate edge to spine.
 
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