clarification required of hot forming vs cold forming

[sarawana]

dears,

can you clarify whare it can be applicable for hot forming & what is process.

 

[david339933]

Hot forming heads is done when required by UG-79/UCS-79 or service required. You can hot form or PFHT (Post Form Heat Treat)
Heat the plate to approx. 1650F then form the head.

 

[0707]

"Hot forming refers to an industrial metal modification process that involves the bending, stretching, flattening or otherwise physically modifying the metal at temperatures greater than 600°C (1112°F).

Hot forming imparts strength to the metal and reduces its susceptibility to corrosion and other damaging agents."

Regards

 

[abangbikerz]

Does that mean hot forming is better than cold forming??

 

[weldstan]

From a metallurgical standpoint hot forming is done above the recrystallization temp and cold forming below.

 

[EdStainless]

'Better' depends on what you need.
Some alloys require PFHT if you cold form.
And some require PFHT if you hot form in order to get back to the correct structure.
There is no universal solution.
It depends on the alloy and the forming required.
That is why there are rules for both methods.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

 

[Dhurjati Sen]

You have asked a very general question. Get hold of "Mechanical Metallurgy" by Dieter and have a look.

DHURJATI SEN
Kolkata, India

 

[r6155]

They can be both hot and cold rolled, depending on grade and thickness, and final dimensions.
Some manufacturers' machines are capable of rolling steel sheets up to 10" thick or more.
The same concept to form heads.

Regards