RE: [MW:4984] Super Duplex Welding

In Super duplex steel inter pass temp need to control / monitor.In my previous project with PDO it was mandatory requirement for our contractor to use PAM unit( Pulse arc monitoring ) during welding of DSS to monitor/ control heat input.
Also in super duplex steel welding the pass done after root pass is called as Cold Pass not Hot Pass !

Bharat B. Gole

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From: standardliu@hotmail.com
To: materials-welding@googlegroups.com
Subject: RE: [MW:4961] Super Duplex Welding
Date: Tue, 27 Apr 2010 16:27:12 +0800

Hi, Rui,
Fortunately, I am working in Boehler Welding China Representitive.
please find enclosed paper sheet of both T-PUT and Boehler products. It may help you I think.
 
My fellows and I discuss your case, our commends are:
1, the diameter is OK. there is no difference between 1.0 and 1.2mm in welding.
2, you have to control interpass temperature. commonly, ≤150℃ is requested, but we prefer to ≤120℃.
3, pre-heating is not necessary.
4, low heat input!
 
I hope it will help you.
 
Regards
 
Roy LIU

 

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To: materials-welding@googlegroups.com
Subject: [MW:4958] Super Duplex Welding
From: Rui.Pinho@pt.linde-gas.com
Date: Mon, 26 Apr 2010 12:45:47 +0100


Dear All


We have problems for welding Super Duplex Nº 1.4410 (see attach of Base Material Certificate) with8 mm thickness.
The process is GMAW - MAG welding an use wire electrode AWS A5.9-06 : ER2594 (see attach of Wire electrode Certificate) and the shielding gas is Ar+20%He+2%CO₂

The bead of first pass is OK, but the next pass (interpass) have lots of porosity, no penetration and Spatter.

Will be control the temperature of interpass?
Will be change the wire electrode?


Thanks for help

Best Regards



Rui Fernandes Pinho
Divisão de Gases Industriais
Desenvolvimento de Aplicação de Gases

Linde Sogás, Lda.
Travessa Joaquim Dias Salgueiro, Nº 44
4470-416 Vila Nova da Telha, Portugal
Phone + 351 22 999 8380, Fax: + 351 22 996 4039
Mobile + 351 91 473 9197
rui.pinho@pt.linde-gas.com, www.linde.pt
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To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

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