Anyone got a clue?
We also have C45 + QT
We where thinking it was Quenc Tempered but i don`t find a solid source for it.
Edited by MatsNorway, 23 February 2012 - 07:42.
Posted 23 February 2012 - 07:42
Edited by MatsNorway, 23 February 2012 - 07:42.
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Posted 23 February 2012 - 09:47
Posted 23 February 2012 - 10:09
Quenched and Tempered.
Heated till just turning red in daylight (about 550c) thrown into water and reheated again to about 250c.
Edited by MatsNorway, 23 February 2012 - 10:09.
Posted 23 February 2012 - 10:42
Posted 23 February 2012 - 11:32
My thumb starts turn red at about -10C550C/1000F is when it just starts to turn red in daylight, old rule of the thumb.
Posted 23 February 2012 - 14:05
550C/1000F is when it just starts to turn red in daylight, old rule of the thumb.
Edited by MatsNorway, 23 February 2012 - 14:06.
Posted 23 February 2012 - 15:22
My lips are sealed.Ohh Tony. Magical fingers. The girls must love that.
Posted 23 February 2012 - 15:58
Its probably whats called dark cherry red..
Only 250degress off..
Posted 23 February 2012 - 17:48
Edited by MatsNorway, 23 February 2012 - 17:50.
Posted 24 February 2012 - 03:30
Most people have heard about steel type 42CroMo4 But no one here knows what the TQ + T stands for. 42CroMo4 TQ + T
Anyone got a clue?
We also have C45 + QT
We where thinking it was Quenc Tempered but i don`t find a solid source for it.
Posted 24 February 2012 - 07:44
Posted 26 February 2012 - 02:25
Good guess but the C45 + QT is a separate steel. It peaks at around 650 Vickers or HRC 65 on the surface and drops down to 300 vickers 0.5mm within. lowest is 198 vickers (HV10)
Its highly likely that it is indeed Quenc tempered. With induction heater.
The 42CrMo4 TQ +T is the big mistery.
And that one is not any harder than the C45 steel it is about the same, slightly above 650 vickers but overall stronger. Im guessing it has been just Quenc tempered for 650 vickers but likely in a different matter. In a slower and milder way. Normalised perhaps? usually they then according to a sales person ad a N for normalised. C45 + N for instance.