That¡¯s good to know. What a guy. I have been heat treating A2 for years in SS foil in the past but never knew I could do that with low carb in my driveway if I had to.
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On Apr 24, 2020, at 5:06 PM, Andrei <calciu1@...> wrote:
?
Very good video.?
To add what Bill in OKC has said about case hardening low carbon steel,
where Tom Griffin takes you through the process using a simple back-yard firebrick kiln.? He is case hardening 1018 parts for a clamp knurling tool that he has demonstrated how to build.
I haven't tried it yet, but need to harden the parts for that knurling tool, so am getting ready to give it a go.?
On Thursday, April 23, 2020, 08:26:22 PM PDT, Bill in OKC too via groups.io <wmrmeyers@...> wrote:
Lots of people have built forges and furnaces by digging a hole in the ground. Or piling up dirt. Bricks, blocks, or rocks? too. A fan, a handful of feathers, or a shop vac to force draft. Scrap wood, charcoal, waste oil, propane... There are a lot of
ways to do it.?
Alexander Weygers has a pretty good book, The Complete Modern Blacksmith.?
https://www.amazon.com/Complete-Modern-Blacksmith-Alexander-Weygers-ebook/dp/B007KPNJD8/ref=mp_s_a_1_3?dchild=1&keywords=complete+modern+blacksmith&qid=1587698705&sr=8-3
Bill in OKC
William R. Meyers, MSgt, USAF(Ret.)
A human being should be able to change a diaper, plan an invasion,
butcher a hog, conn a ship, design a building, write a sonnet, balance
accounts, build a wall, set a bone, comfort the dying, take orders,
give orders, cooperate, act alone, solve equations, analyze a new
problem, pitch manure, program a computer, cook a tasty meal, fight
efficiently, die gallantly. Specialization is for insects.
LAZARUS LONG (Robert A. Heinlein)
On Thursday, April 23, 2020, 09:38:37 PM CDT, Andrei <calciu1@...> wrote:
Where is Jody going to get a forge and how will he keep it at 1000+ degrees for several hours?
Typos are courtesy of autocorrect.
Or you can put it in a metal box or can packed with carbon, scraps of leather or horn, or a few other things, seal it, and put it in a forge and keep it red-hot for several hours. Then dump and quench. There are usually several ways to do things in metalworking.
Some of them are old-fashioned and not as controllable, but adequate for occasional use.?
I guess it helps if you read old books on how things were done before modern equipment was invented.?
Bill in OKC
William R. Meyers, MSgt, USAF(Ret.)
A human being should be able to change a diaper, plan an invasion,
butcher a hog, conn a ship, design a building, write a sonnet, balance
accounts, build a wall, set a bone, comfort the dying, take orders,
give orders, cooperate, act alone, solve equations, analyze a new
problem, pitch manure, program a computer, cook a tasty meal, fight
efficiently, die gallantly. Specialization is for insects.
LAZARUS LONG (Robert A. Heinlein)
On Thursday, April 23, 2020, 08:31:38 PM CDT, Andrei <calciu1@...> wrote:
1018 can be hardened by carburizing. It takes hours at high temperatures, it takes a special furnace where they pump carbon monoxide and sulphur and other stuff. Definitely not something you can do at home.? And it won't be as good
as o1 steel
Typos are courtesy of autocorrect.
Glenn sticking 1018 in water will not harden its a waist of time
GP
On Thursday, April 23, 2020, 9:02:06 PM EDT, Glenn N <glennsneff@...> wrote:
Glenn
Sent: Thursday, April 23, 2020, 5:18 PM
Subject: [atlas-craftsman IO] Making an ER40 Collet Chuck
So I went by the metal store by the house and picked up a 3" 1018 round bar drop off for a few bucks.? Very little round bar to choose from so I grabbed a piece of what they had since its only a few bucks.
I believe I should be able to get this heat treated afterwards.? ?I'll have to see what sort of hardness it? an provide.
I have no idea how this will machine.? I'll give it a spin.
So what sort of hardness is needed for a? collet chuck.
-Jody
Sent via the Samsung Galaxy S10+, an AT&T 5G Evolution capable smartphone
-------- Original message --------
Date: 4/23/20 4:00 PM (GMT-06:00)
Subject: Re: [atlas-craftsman IO] Making an ER40 Collet Chuck
A collet chuck needs a hardened surface where the collet"s contact the taper of the chuck. You can use a oil hardening steel or water hardening. Make sure you do it properly and watch the colors of the steel when you dunk it in. I can walk you
thru the process but i need to know the type of steel
GP
On Thursday, April 23, 2020, 4:38:15 PM EDT, Andrei
<calciu1@...> wrote:
Oops. forgot about the collets being hardened and the cast iron, vastly less so. Thanks?GP
A collet chuck needs to be made from tool steel not cast iron. The collet will dig in to the cast iron. Its a no no
GP
On Thursday, April 23, 2020, 4:16:05 PM EDT, Andrei
<calciu1@...> wrote:
1 foot long piece of 4.25" cast iron is 106 bucks at mcmaster. yuo need this diameter to finish at 100mm for your chuck.
1144 is only available in 3" max diameter, so your options may be limited in using this.?
Cast iron is always a good (but messy) option. You can order a slice of various diameters from McMaster Carr. This is a company that never disappoints, until your check your bill
?. Their products are top notch, selections are wide and deep and they are delivered quickly. The prices match the quality of product and service. I have never hesitated buying from them.?
Best Regards,
Andrei D. Calciu
6371 Birch Leaf Court
Burke, VA 22015-3528 USA
?
703-995-4822 (landline and Fax)
571-436-0169 (mobile)
mailto:calciu1@...
?
?
Jody - Regarding your question about stainless for your project: I have not had much experience working with stainless, but what little I have had has all been bad. This may say more about my fairly limited machining experience than anything else, but
I found work hardening to be a real problem.
Take a look at this chart for some idea of how easy it is to machine various metals:
You might consider 1144 stressproof. You can look up various alloys on SpeedyMetals and get more information on typical uses.
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Brian Cayer