Dear Mr.Bo,
You have to use ERCuNi for both the layers.
Be careful on preheat to avoid any crack at first layer.
Interpass to be controlled carefully. Overheating will lead to excessive dilution and incresed hardness.
First layer current is very critical and it controls the dilution.
Overlap to be maintained in SMAW around 40-50%
For SAW/ESW overlap to be maintained 10-15mm.
Regards,
Ibrahim PK
On 11 May 2010 16:03, Marco Engelvaart <mengelvaart@smwpc.com> wrote:
Bo,
Can you give more details?
- Process used, welding parameters, overlap of weld-beads?
- 1 layer Ni and 2 layers ER-CuNi? Or 1 layer of both
- What Ni and Fe-content are you looking for?
In the doc attached you will find more details on cladding these alloys ---> page 16 and further
Best regards,
Marco
-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of bo gyi
Sent: 11 May 2010 05:41
To: Materials & Welding
Subject: [MW:5137] Copper Nickel weld overlay
I have encountered that Ni & Fe content are too high for two layers of
ERCuNi overlay to SA106 Gr.B.
When I use ERNi-1 as buffer layer, Ni% much more higher than without
buffer.
Can anyone give me some advice?
Regards,
--
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Thanks & Regards
Muhammed Ibrahim PK
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