re-heat treat 1095 to shrink
re-heat treat 1095 to shrink
(OP)
I have been trying a new process for our 1095 ring, .057 thick x 1.38 ID x 2.12 OD. We normally stress relieve on fixtures, heat treat, quench and draw. We tried stress relieving without fixtures and my ID grew to 1.140 and my OD shrunk 2.11. It was only 100 pieces but was wondering if I can re-heat treat and shrink the ID?





RE: re-heat treat 1095 to shrink
Having said that, I know of no way to accomplish what you want to do. The 0.057” dimension (you call it a thickness, but it is really a height, correct?) is so small that I can’t think of anything to do but start over.
rp
RE: re-heat treat 1095 to shrink
RE: re-heat treat 1095 to shrink
Re: no documentation, that's an age-old problem. Nobody wants to fill out paperwork, particularly if nobody is going to check to make sure it is done correctly.
rp
RE: re-heat treat 1095 to shrink
I am not sure what metallurgical properties you need but 1095 steel is a good candidate for austempering, espcially with the size and thickness of your ring.
RE: re-heat treat 1095 to shrink
We are trying to lighten up the processes to make it faster by not putting on fixtures at the very first op. stress relieve. For some reason my 5 piece sample after draw the ID was larger than normal. Normal is Ø1.138 avg., these were Ø1.140-1.141.
The only thing I can think of is the operator forgot to tighten down the fixture during draw. Our fixtures are heated and the parts are stacked on the fixture and the nut is finger turned and put in the overn until the part and fixture are to temp. Then the parts and fixtures are taken out and the nut tightened with an impact wrench, put back in the over at temp.
I ran another large lot and had great results running as we always run. So something went amiss on our 5 piece sample????
RE: re-heat treat 1095 to shrink
RE: re-heat treat 1095 to shrink
PER AMS 5122 coil.
Right now we are cutting into strips to fit our blanchard grinders because we can only get material at the .060 thickness. Because these parts get plated we grind the strips to .057/.058. Parts are stamped from a die. We rough tumble because of cracking issues and stress relieve because of the grind and punch operations.
We have a lead on some material that is .058 thick so hopefully this pans out and we can eliminate seveal operations. ID and OD tolerances are generous +/-.010, but thickness and flatness are critical. Thickness because plating adds .004, and flatness has to be under .002. A bearing rides on the surface.
RE: re-heat treat 1095 to shrink