F53 Duplex SS forgings crack during heat treatment
F53 Duplex SS forgings crack during heat treatment
(OP)
Hi everyone,
I have a problem regarding F53 duplex SS. We were annealing 2-1/2" OD forgings in-house at the recommended ~2000 deg F. The forgings were taken out even before any quenching with long cracks along the surface or even split in half. I know that the intermetallic sigma phase can cause a severe reduction in ductility.
This may not be much information to give a good analysis, but any ideas as to how this may have happened would be greatly appreciated. I will try to provide any further info that is requested.
Pictures of the cracked forgings are attached
I have a problem regarding F53 duplex SS. We were annealing 2-1/2" OD forgings in-house at the recommended ~2000 deg F. The forgings were taken out even before any quenching with long cracks along the surface or even split in half. I know that the intermetallic sigma phase can cause a severe reduction in ductility.
This may not be much information to give a good analysis, but any ideas as to how this may have happened would be greatly appreciated. I will try to provide any further info that is requested.
Pictures of the cracked forgings are attached





RE: F53 Duplex SS forgings crack during heat treatment
RE: F53 Duplex SS forgings crack during heat treatment
RE: F53 Duplex SS forgings crack during heat treatment
http://www.imoa.info/_files/stainless_steel/IMOA_S...
Maui
www.EngineeringMetallurgy.com
RE: F53 Duplex SS forgings crack during heat treatment
Can you provide us chemical composition with all residual elements?
What is the hot working Ratio?
What is the ramp up velocity of the furnace?
What is the temperature of the forgings when it was introduced in heat Treatment Furnace?