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Απ: [MW:30801] Heat input and cooling

By Materials & Welding
The issue is complex. 
Higher heat input  with high sink (large and thick work) will result in high cooling rate which will result to high hardness if no adequate preheat

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-------- Αρχικό μήνυμα --------
Από: Kannayeram Gnanapandithan <kgpandithan@gmail.com>
Ημερομηνία: Κυρ, 19 Απρ 2020, 08:48
Προς: materials-welding <materials-welding@googlegroups.com>
Θέμα: Re: [MW:30797] Heat input and cooling
Yes. More heat input will be cooled slowly depending on somany condition where as less heat input will be cooled faster . 

On Sun, 19 Apr 2020 10:30 am Student, <nabeel233@gmail.com> wrote:
Dear all
I am confused about the following statement. Can anyone tell me the reason.

High heat input causes slow cooling and low heat input causes fast cooling.

I understand that cooling is a function of temperature differences between the metal and ambulance system. If high heat input causes high temperature then temperature differential should be higher than low heat input.
Can any one tell me the reason.

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