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Sand cast billet - then forge to final
Weaponeer Forums : Casting

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  OldCoot

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Posted: September 21 2014 at 11:30am | IP Logged Quote OldCoot

I've been doing some forging from bar stock.  Got to looking at the SKS receiver as a model, and considering how to make it better -cheaper.  Cast steel tends to have a very coarse grain structure to it.  If a fellow was to take the cast billet, anneal it, and then take it to forging heat and do a forged receiver from that billet, I wonder what the final grain structure would look like?

Have gotten conflicting suggestions from a couple of the old men that I know, who have been messing with steel since before I was wearing anything but nappies (yeah, they'r old...) so I guess the only way to get a good answer is to try it.
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  backbencher

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Posted: September 21 2014 at 4:56pm | IP Logged Quote backbencher

How big is your hammer?
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  OldCoot

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Posted: September 21 2014 at 8:26pm | IP Logged Quote OldCoot

I can go up to half a ton, and get up to ten and a half feet of drop.  Unfortunately, it requires the tractor to recock the thing, which is why I made the hammer capable of being added to to get that weight.  Maximum die I can get onto the anvil block is about a foot by eight inches.
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  backbencher

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Posted: September 22 2014 at 1:44pm | IP Logged Quote backbencher

Wow. That IS a forge. Does Mrs Coot drive the tractor?
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  northumbrian

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Posted: September 23 2014 at 12:52am | IP Logged Quote northumbrian

I've been looking at building a two cylinder hydraulic press for my forge when I get it built that is.
Using two short 50ton rams, and a hydraulic power pack to drive it.

But back to the original question, the core will still be coarse grained, but the outer should be compressed.
However it will need a fair amoount of playing around with to get it right.
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  OldCoot

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Posted: September 28 2014 at 10:09am | IP Logged Quote OldCoot

backbencher wrote:
Wow. That IS a forge. Does Mrs Coot drive the tractor?


Would dearly love to have her back to do the tractor driving, backbencher.  I did build the weight so I can do a partial drop.  First drop is about 250 pounds dropping eight feet.  Second drop is another 250 pounds dropping nine feet, and the last chunk drops ten, and weighs about five hundred pounds.

I'll be adding steel as I can find it available cheap, because I want to get up to a ton at ten feet before I'm finished building on this thing.
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  backbencher

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Posted: September 28 2014 at 10:46pm | IP Logged Quote backbencher

Ah, my apologies. I suppose they won't give tractor licenses to late Coots. Are there young Coots handy?
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