Localised Solution Annealing Duplex Casting
Localised Solution Annealing Duplex Casting
(OP)
Hi,
I have a casting made to ASTM A890 1A, Duplex Stainless. The casting has failed hydro testing, a weld repair has been made. I know Solution annealing is required. The question has been raised to conduct a workshop localised PWHT, heating to above 1100 deg C followed by quenching (buckets of water and wet rags).
I am concerned that potentially more damage could be done as there is a chance of forming embrittled precipitates in the surrounding region. I believe the entire casting should be uniforming heated and quenched.
Am I on the right path?
I have a casting made to ASTM A890 1A, Duplex Stainless. The casting has failed hydro testing, a weld repair has been made. I know Solution annealing is required. The question has been raised to conduct a workshop localised PWHT, heating to above 1100 deg C followed by quenching (buckets of water and wet rags).
I am concerned that potentially more damage could be done as there is a chance of forming embrittled precipitates in the surrounding region. I believe the entire casting should be uniforming heated and quenched.
Am I on the right path?





RE: Localised Solution Annealing Duplex Casting
RE: Localised Solution Annealing Duplex Casting
The entire casting should be re-annealed and quenched.
Make sure that the quench tank is large enough to to assure adequate cooling.
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P.E. Metallurgy, Plymouth Tube