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Anyone here a blacksmith? #5388702 03/29/20 02:13 PM
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53' Stude Offline OP
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As many folks may or may not know, I enjoy the blacksmithing art or watching it being done. Is anyone here a blacksmith? Also, what actually is a quenching oil? I did google this and couldn't get a decent or proper answer.

Thank You kindly USA Canada


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Re: Anyone here a blacksmith? [Re: 53' Stude] #5388709 03/29/20 02:24 PM
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Quenching oil is to get more carbon into the steel to make it harder. Not a blacksmith but have an extensive metals background and have worked in 2 large steel mills among other metals manufacturing environments.


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Re: Anyone here a blacksmith? [Re: spk2000] #5388718 03/29/20 02:38 PM
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53' Stude Offline OP
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Originally Posted by spk2000
Quenching oil is to get more carbon into the steel to make it harder. Not a blacksmith but have an extensive metals background and have worked in 2 large steel mills among other metals manufacturing environments.

Thanks for the info. Some searching I did says possibly a vegetable oil. Anybody know what oil is used for quenching?


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Re: Anyone here a blacksmith? [Re: 53' Stude] #5388719 03/29/20 02:40 PM
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Would used motor oil work? Should have more carbon.

Just make sure it's not from a gdi engine! grin2

Last edited by spasm3; 03/29/20 02:41 PM.

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Re: Anyone here a blacksmith? [Re: 53' Stude] #5388864 03/29/20 06:58 PM
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Originally Posted by 53' Stude
Originally Posted by spk2000
Quenching oil is to get more carbon into the steel to make it harder. Not a blacksmith but have an extensive metals background and have worked in 2 large steel mills among other metals manufacturing environments.

Thanks for the info. Some searching I did says possibly a vegetable oil. Anybody know what oil is used for quenching?

Peanut oil and Canola oil.
https://www.knifepath.com/best-oil-quenching-steel/


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Re: Anyone here a blacksmith? [Re: 53' Stude] #5388879 03/29/20 07:18 PM
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Kestas Offline
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I've evaluated quenched and tempered product for 40 years and I've never heard of steel picking up carbon from the quench. I dont know where people get that from. It just doesn't happen.

Oil is used to reduce the quench severity, because water can sometimes crack the part. Used motor oil should work okay for backyard quenching. Just make sure the water content is low.

Re: Anyone here a blacksmith? [Re: Kestas] #5388889 03/29/20 07:26 PM
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Originally Posted by Kestas
I've evaluated quenched and tempered product for 40 years and I've never heard of steel picking up carbon from the quench. I dont know where people get that from. It just doesn't happen.

Oil is used to reduce the quench severity, because water can sometimes crack the part. Used motor oil should work okay for backyard quenching. Just make sure the water content is low.


Yeah … physics did not change circa Twitter … that’s how we made homemade chisels when I was in High School
(around the time iron was first discovered 😎)

Re: Anyone here a blacksmith? [Re: 53' Stude] #5388918 03/29/20 08:12 PM
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The machine shop I worked in almost 60 years ago water quenched and tempered some parts including small v notched knives. The company engineer wanted to try oil quenching and had some success. the blacksmith stuck with water as his knives would cut more glue tape than the oil quench. A comment was made that if the knives were oil quenched after sharpening some carbon would be embeded in the steel. Most heat treating was checked for hardness but not the knives.


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Re: Anyone here a blacksmith? [Re: 53' Stude] #5388923 03/29/20 08:20 PM
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Whoever made that comment didn't know what they were talking about. Chalk it up to myth or old wives tale.

Re: Anyone here a blacksmith? [Re: spasm3] #5388931 03/29/20 08:29 PM
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Originally Posted by spasm3
Just make sure it's not from a gdi engine! grin2


eek LOL

Re: Anyone here a blacksmith? [Re: Kestas] #5388933 03/29/20 08:31 PM
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53' Stude Offline OP
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Originally Posted by Kestas
Whoever made that comment didn't know what they were talking about. Chalk it up to myth or old wives tale.

Yeah, quenching steel or iron in water is let's just say not wise at all. Somedays I seriously just shake my head


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Re: Anyone here a blacksmith? [Re: 53' Stude] #5388991 03/29/20 09:52 PM
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It depends on the steel and what you want to end up with, if you are using an O type steel the O stands for oil quench, if your using an
A steel it is Air Quenching. If you use water you will get a harder finish but if you use a fine grained steel and water quench you stand a good chance of cracking it.
If you want to anneal it quench in sand.

Re: Anyone here a blacksmith? [Re: 53' Stude] #5389016 03/29/20 10:47 PM
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Originally Posted by 53' Stude
Yeah, quenching steel or iron in water is let's just say not wise at all. Somedays I seriously just shake my head

When heat treating a cold chisel I use the water method followed by annealing also in water. Been using this method since 1959.


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