I just meet a problem from one of my customers.
It is a Boiler Manufactory in China.
Details as follow:
base material: P91
process: SMAW (root) + SAW (filler metals)
Heat Input: high
I=380A
U=35V
V=250mm/min
Preheat, Interpass Temperature: ≤250℃
How to control cracks?
How to increase impact properties afer PWHT?
Best regards
Roy LIU
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