Also in super duplex steel welding the pass done after root pass is called as Cold Pass not Hot Pass !
Bharat B. Gole
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
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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