E9018-B3 repair is cracking
E9018-B3 repair is cracking
(OP)
We are attempting a crack repair on a large F22 forging (several tons I estimate), where the joint restraint is extremely high. The first attempt with TIG & SMAW has failed, with at least one of the SMAW passes showing centreline cracking.
My question is this: is the B3L filler any less prone to cracking than B3?
My question is this: is the B3L filler any less prone to cracking than B3?
"If you don't have time to do the job right the first time, when are you going to find time to repair it?"





RE: E9018-B3 repair is cracking
d
RE: E9018-B3 repair is cracking
The excavation was at a 90° internal corner where fatigue cracking had initiated, and I suspect the first excavation was too narrow.
I want to implement every technique possible to prevent a repeat of the cracking, including B3L if that helps. Block welds and root layers will all be done using GTAW.
Preheat will be 350°F min.
"If you don't have time to do the job right the first time, when are you going to find time to repair it?"
RE: E9018-B3 repair is cracking
Dik
RE: E9018-B3 repair is cracking
RE: E9018-B3 repair is cracking
Do you mean after partial repair?
"If you don't have time to do the job right the first time, when are you going to find time to repair it?"
RE: E9018-B3 repair is cracking
RE: E9018-B3 repair is cracking
RE: E9018-B3 repair is cracking
RE: E9018-B3 repair is cracking
Your recommendations for the weld prep are similar to what I have advised them. Electric resistance pads are being used. They were worried about too much preheat, but I told them more is better, and with the mass involved there is no possibility of it running away.
"If you don't have time to do the job right the first time, when are you going to find time to repair it?"
RE: E9018-B3 repair is cracking
I had to put the brakes on the contractor's PWHT procedure, which permits a too high heating and cooling rate.
"If you don't have time to do the job right the first time, when are you going to find time to repair it?"