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Old 12-09-2019, 08:19 PM
Secant Secant is offline
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Default Elements of Tempering, Normalizing and Annealing

An older film on youtube, interesting & informative on a subject that is often confusing and misunderstood-

https://m.youtube.com/watch?v=COasmrnxbqg
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Old 12-10-2019, 12:14 PM
crystallographic crystallographic is offline
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Default steel heats by color

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Originally Posted by Secant View Post
An older film on youtube, interesting & informative on a subject that is often confusing and misunderstood-

https://m.youtube.com/watch?v=COasmrnxbqg

Thanks Karl,

This should be very helpful for those working with steel.
When the film shows the 1525F for annealing steel - with slow cooling from that temp) - imagine taking mild steel body work to the red heat in a lighted room, and quenching it suddenly with cold water ... and it becomes ... harder. (This film should remove that surprise element. )
Steel heats at colors are listed here:

http://www.mooseforge.com/Techniques/heatcolors.html
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Old 12-10-2019, 01:36 PM
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I enjoy watching just about anything in black and white. Varied shades of red is good too. Both were interesting, thanks.
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Old 12-10-2019, 06:21 PM
skintkarter skintkarter is offline
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Good relevant stuff Karl - thanks for posting. Takes me back to my early days at British Steel polishing and etching samples to look at grain structures.
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Old 12-11-2019, 12:42 AM
Secant Secant is offline
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Three more to ponder:

The Drama of Metal Forming
https://m.youtube.com/watch?v=aEatTMQsGtg

Heat treatment of Aluminum-part 1
https://m.youtube.com/watch?v=BBFBJ1zJlmA&t=186s

Heat Treatment of Aluminum-part 2
https://m.youtube.com/watch?v=fJyD8R8zFLEl
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