Re: [MW:31754] Facing crack in during overlay welding of Stellite 12 on Duplex material

https://www.valvemagazine.com/magazine/sections/materials-q-a/7461-hardfacing-stainless-steel.html

On Fri, 20 Nov 2020 at 15:16, SURESH <qms.pjgpl@gmail.com> wrote:

Dear Experts

During welding of Duplex grade material we are facing crack on the weld metal as attached in the photo. Below is the detailed process for reference

Process: PTAW

Base Material: ASTM 182 Gr.F55

Consumable: Stellite 12 (Powder)

PreHeat: Nil

Interpass: <200*C

Current: 128 to 145

Gas: Ultra Pure ARGON

Job Size: OD544 X ID 472 X Thk 36mm

Welding: Overlay weld on OD Surface alone

We are welding deposition thickness of 3mm. So as per this we are doing welding of 2 layer with multi pass, On welding second layer we found crack. Can anyone suggest where it is went wrong and why this crack is propagated. Please advice

 

In First layer- Total of 12 weld pass

In second layer- Total of 12 weld pass

Regards

Suresh

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