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  1. 05-16-2013, 04:50 AM #1
    GVIkzn
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    Default Home-made furnace for hardening

    Hi gents!
    I decided to make a muffle furnace
    I read the forums, made calculations, collected materials.
    For hardening of knives and razor blades to me more than enough
    Internal Dimensions: Diameter - 50 mm, length - 280 mm. The design temperature up to 1000 degrees. Celsius.
    Automatic first made on thyristors, but for some reason he was burned in the tests, and I remade by a magnetic switch. It seems as long as everything works. Will soon begin full operation, except the furnace should be much more.
    Name: Фото0008.jpg Views: 1525 Size: 21.2 KB
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    Last edited by GVIkzn; 05-16-2013 at 04:53 AM.
    If something is unclear in the text, please correct me ......
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  3. 05-16-2013, 04:57 AM #2
    Bruno
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    Cool. What materials did you use?
    Til shade is gone, til water is gone, Into the shadow with teeth bared, screaming defiance with the last breath.
    To spit in Sightblinder’s eye on the Last Day
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  4. 05-16-2013, 05:03 AM #3
    GVIkzn
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    The base of the big old electrical fuse
    Heater - nichrome wire 1 mm.
    Plastering - chamotte clay to 1600 C
    Winding - asbestos cloth.
    Thermal insulation - basalt wool
    The rest can be seen in the photo
    Substance likes this.
    If something is unclear in the text, please correct me ......
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  5. 05-16-2013, 05:50 AM #4
    Bruno
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    Can you still get Asbestos cloth in Russia?
    Substance likes this.
    Til shade is gone, til water is gone, Into the shadow with teeth bared, screaming defiance with the last breath.
    To spit in Sightblinder’s eye on the Last Day
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  6. 05-16-2013, 06:04 AM #5
    GVIkzn
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    Do not quite understand your question.
    Asbestos we can buy
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    If something is unclear in the text, please correct me ......
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  7. 05-16-2013, 08:12 AM #6
    bongo
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    That looks fantastic mate ....Thanks for sharing with us !!
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  8. 05-16-2013, 12:08 PM #7
    Bruno
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    Quote Originally Posted by GVIkzn View Post
    Do not quite understand your question.
    Asbestos we can buy
    Asbestos is highly carcinogenic (asbestos particles cause lung cancer), and is not sold anymore in many Western European countries.
    Last edited by Bruno; 05-16-2013 at 12:10 PM.
    edhewitt and Substance like this.
    Til shade is gone, til water is gone, Into the shadow with teeth bared, screaming defiance with the last breath.
    To spit in Sightblinder’s eye on the Last Day
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  9. 05-16-2013, 11:01 PM #8
    DDTech
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    Quote Originally Posted by GVIkzn View Post
    What exactly is necessary, in my mind, everything is clear.
    If you have any specific questions - ask.
    Nothing specific. I just meant, i'd like to see/hear more of it like being in action.
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