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12-03-2016, 09:30 AM | #23 | ||||||
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Bruce, I feel your pain. That not only happens in fly over country but right here in the east. My home state of New Hampshire was once VERY RED and now has turned blue. Folks moving in from south of us with there liberal ideas.
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Daniel Webster once said ""Men hang out their signs indicative of their respective trades; shoemakers hang out a gigantic shoe; jewelers a monster watch, and the dentist hangs out a gold tooth; but in the mountains of New Hampshire, God Almighty has hung out a sign to show that there He makes men." |
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The Following 2 Users Say Thank You to Stephen Hodges For Your Post: |
12-04-2016, 07:46 PM | #24 | ||||||
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Pawel, I have Dr. Oscar Gaddy's articles from 1996 on the Color case hardening process if you would like to have them in a pdf format. They may be helpful to you. If so, please e mail me at
l.stallones@centurytel.net |
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The Following 2 Users Say Thank You to Leighton Stallones For Your Post: |
12-05-2016, 08:38 PM | #25 | ||||||
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Edgar. you can not do a Rockwell test or a Brinnell test on a casehardened surface because the depth of the case is in the case of a gun receiver is less than .002 deep. Therefore when the diamond penetrator enters the casehardened surface it enters to deep giving a false reading. Casehardening leaves the inside soft which makes the component stronger. Carbon steels have a carbon content of 0.4% or higher and will harden through the entire part although the core will be softer than the surface
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12-05-2016, 09:04 PM | #26 | ||||||
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...........
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"I'm a Setter man. Not because I think they're better than the other breeds, but because I'm a romantic - stuck on tradition - and to me, a Setter just "belongs" in the grouse picture." George King, "That's Ruff", 2010 - a timeless classic. |
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The Following 3 Users Say Thank You to Dean Romig For Your Post: |
12-05-2016, 10:43 PM | #27 | ||||||
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Carbon Steels usuaaly start with low carbon like 1008 and go up to 1030, medium carbon are 1040 to 1060 and high carbon is 1070 to 1090. Note the last two numbers refer to the decimal percent carbon content. These are simple unalloyed steels. Low carbon is not heat treatable per se but can be case hardened. The case depth is dependent on the process used and can be as little as .005 for nitriding and .010 for carbon packing and furnace heating. Gas carburizing can even go deeper.
Case hardening only makes the surface harder for low carbon steels. It does not make it stronger. What is the outcome of the process is a hard outer surface with a non-brittle tough core. Note that this is a very old process done with low tech steels.
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Spin Drift War Damn Eagle Molon Labe |
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12-06-2016, 01:40 AM | #28 | ||||||
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We need Ed "The Torch" Good to come back and explain case colors.
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The Following User Says Thank You to Bruce Day For Your Post: |
12-06-2016, 03:25 AM | #29 | |||||||||
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Quote:
Quote:
Unlike many gunmakers, Parker used forgings with elevated nickel and moly, not plain carbon steel. Blindly heat treating anything without knowing its analysis can leave you with much deeper harness, and reduced ductility. Quote:
Admit it, Bruce, you miss him too, right? |
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The Following 3 Users Say Thank You to edgarspencer For Your Post: |
12-06-2016, 06:24 AM | #30 | ||||||
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Oh yes Edgar. I do.
I fear some secrets have been lost without him, such as grade and viscosity of the motor oil, new or used and how long to apply the torch. And I miss his formidable writing skills. It's part of being inclusive, valuing each and everybody and being a safe space. I'm glad you agree. |
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The Following User Says Thank You to Bruce Day For Your Post: |
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case coloring, refinishing, restouration |
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