Dear Tahir:
Use low heat input welding processes. The lower, the better...
GMAW-Spray mode is good but pulsed arc works magic for these Q&T materials.
Use low heat input welding processes. The lower, the better...
GMAW-Spray mode is good but pulsed arc works magic for these Q&T materials.
Do not forget to control so that you do not exceed preheat and inter-pass temp ranges.
Ramin Kondori
Sr. QA/QC engineer
Yadavaran Oilfield Project
SIPC (SINOPEC)
On Wed, Apr 16, 2014 at 1:59 PM, tahir alam <tahiralam007@gmail.com> wrote:
Dear Experts--we try to qualify PQR of Material 16 mm 514 Gr F in 2G and 3G position.we did the testing of tensile test ,bend and hardness test.Tensile test and bending test is satisfactory but vickers hardness number is more in HAZ(i.e 322) .Here while doing welding of piece we maintain the preheat temperature of 400F and interpass temp of 200F.But according to client hardness should be 250 max.Can u advice me how to reduce the hadness in HAZ while doing welding of test piece.Kindly advice me any method to maintain hardness 250.Best RegardsTahir Alam
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