Optimal Heat Treatment Times for Steel Specimens: A Practical Guide

AI Thread Summary
The discussion centers on the heat treatment process of two specimens requiring hardening and tempering. The user seeks clarification on specific time calculations for heat treatment based on the dimensions of their specimens. The key points include the need to understand the cross-sectional area of the parts being treated, as this influences the duration of the heat treatment. The user’s specimens are specified, with one measuring 12.5mm x 12.5mm x 100mm and the other 12.5mm x 31mm x 32mm. The conversation highlights that heat treatment times can vary based on the type of material and the method used, such as whether the treatment is applied to billets or smaller parts like plates or strips. Additionally, it notes that some companies determine annealing times based on the length of the heat treatment mill and the speed of the material through the furnace.
shark86
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Hi forumer,

I have 2 specimens that need to be done hardening and tempering.

I have found some journals for it. But i don't understand the following statement.

"10mins/cm of ruling section" ; and

"1 hour per 25mm of section"

If my specimens dimension are:

A) 12.5mm X 12.5mm X 100mm ;and

B) 12.5mm X 31mm X 32mm.

So, how long should be the heat treatment for both specimen A and B.

Thank you. Hav a nice day
 
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One needs to know the cross sections of the parts being heat treated in the journals.

Are the heat treatments done on billets or smaller parts, e.g., plates or strip.

Some companies use strip mills and the annealing time is determined by the length of the heat treatment mill/furnace and speed of strip.

Surface hardening is often accomplished by induction elements with a particular speed of the part through an induction coil.
 

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