How to reduce liquation cracking in super austenitic stainless steels ?

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Nelaturi V Raghavaiah

Slowing cooling except in the range of 450 to 850 deg C gives better castings.

André Vicente

Dear Nithin Raj ,

Good afternoon!

I would suggest you to check the chemical composition of the part with special attention to residual elements such as S, P or B that may have an important role in causing or enhancing liquation effects. Some solidification and/or liquation cracking is associated with intentional minor alloying additions, such as Nb.

I published a paper on hot cracking of austenitic stailess steels that may be useful for you:

Article The use of duplex stainless steel filler metals to avoid hot...

I hope you like it!

I am working on a new paper on solidification cracking of Ni based alloys.

Kind regards,

Andre

Gary Coates

Check the grain size of the casting - large grains give more cracking. Need to find a balance between slow cooling and grain size.