After heating at 950°C and holding the temperature for 3 hours there is a soaking time that is provided for 12 hours. What is the soaking time being referred to here? A detailed reply to this will be very welcome.
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1$\begingroup$ kloecknermetals.com/blog/the-three-stages-of-heat-treatment $\endgroup$– Solar MikeMar 21, 2021 at 8:31
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$\begingroup$ It helps to know what is being heat treated here. Otherwise you'll get misunderstandings based on guesswork. $\endgroup$– user_1818839Mar 21, 2021 at 18:14
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1 Answer
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At that high temperature , there are some things like carbides and intermetallics going into solid solution. Also some chemical homogenization ( which is similar to the solution). To a small degree the temperature is becoming more uniform ; although the surface has reached temperature the core of a thick component takes longer to reach temperature ; Usually addressed by typical ASME requirement by " one hour per inch of thickness". For a lower temperature like 500 C ,it would be time for stress relieving to develop , as in PWHT. That high temperature sounds like a solution anneal for a ferrous superalloy, followed by a fast cool. However 3 + 12 hours is exceptionally long in my experience.
answered Mar 21, 2021 at 15:08
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$\begingroup$ Tip: You can also use HTML entities
Ω,μ,°,×, etc. as well as<sup>...</sup>and<sub>...</sub>in the posts (but they don't work in the comments). $\endgroup$ Mar 21, 2021 at 16:45