Need all your experience sharing on the below problem.
Material: ASTM A182, F55
Process: PAW
Welding: Hard facing weld overlay
Consumable ERCoCr-B (Stellite 12)
Layer deposited: 2 Layers
Deposition thick: 3 to 4mm ERCoCr-B on Base material
Interpass maintained: 150*C
During weld deposition of PAW process on 2nd layer itself crack has been propagated. We tried to rework by grinding and touch up, from that moment crack has been developed. If we tried to attend the crack place, other place are developing crack. Also now we again tried to rework, crack has been developing all the place, kindly tell me where this goes wrong?????
We are confused to do rework. As we goes deep to remove the crack, so we tried to grind 4mm deep now again deposited ER2594 by Tig process and then we follwed to weld by ERCoCr-B filler by TIG process. Again crack is developing enormously.
Please give valuable input to overcome from where we goes wrong in this?
REGARDS
SURESH
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
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