Hi
Please check the shielding Gas
Argon + 2 % Nitrogen purity levels
purging gas 100 percent Argon . Better to control with less than 100 ppm
You should have purge monitor with least count .001
Nitrogen also play important role is Austentic and ferrtic phase distribution .
Kr
Das
On Thu, 29 Apr 2021, 12:50 pm Chintan, <chintan51@gmail.com> wrote:
Dear Expert,After Filling & Capping of Weld Metal, During % Ferrite check via Feritoscope values are showing less than requirement, How ever all other test i.e. Hardness, PMI etc. are well accepted.Kindly advice on possible root cause as well as tips to achieve high FerritePlease find below details for your quick ref.Material Grade - SDSS -UNS s32760Joint type -Pipe - Butt weld - 18 mm thickWelding Process - GTAW + SMAWWelding Consumable - ER 2594 + E 2594-15% Ferrite - GTAW ( Root ) - 35%, SMAW ( Capping) - 25 -28 %, Base metal - 35to 40%, HAZ - 32 to 35%% Ferrite - Spec Req - 30 to 70%Inerpass mentained - 100°C for GTAW, 120°C for SMAWHeat input - GTAW - 0.8 to 1 KJ/mmSMAW - 1.2 KJ/mm--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/6e8220cb-cdad-455d-b466-5cea0e6b4290n%40googlegroups.com.
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CAJyLdkrHDJoa3f3_Lyss87-9a6WQLqi6qCSSKZt07myGZ%2B9S2Q%40mail.gmail.com.
No comments:
Post a Comment