Hi MPK I would like to share one practical example from my past assignments. In UT after SAW welding of CS, we were getting fine cracks. The WPS was religiously followed and we were confused ! After lot of investigation we found out that our welding operator had made short the SAW nozzle during welding which had caused copper contamination in the weld and resulted in cracks. Regards Prem Nautiyal Mobile +91 9004063879 / 9769316004
--- On Wed, 11/30/11, pgoswami@sympatico.ca <pgoswami@sympatico.ca> wrote:
From: pgoswami@sympatico.ca <pgoswami@sympatico.ca>
Subject: RE: [MW:13103] what is the root cause for copper crack in saw welding ?
To: materials-welding@googlegroups.com
Date: Wednesday, November 30, 2011, 9:22 AM
Hi MPK, It's a form of solidification cracking caused due to localized segregation of low melting elements. Copper is one of the elements which tends to form so, for C.S and high strength and medium strength low alloy steels. Please see the reference below. Thanks. P.Goswami,P.Eng,IWE http://content.lincolnelectric.com/pdfs/knowledge/articles/content/weldcracking.pdf
Date: Tue, 29 Nov 2011 16:32:37 +0300 Subject: [MW:13100] what is the root cause for copper crack in saw welding ? From: ranmi2007@gmail.com To: materials-welding@googlegroups.com Dear Experts,
What is the Root cause for copper crack in SAW welding ?
thanks,
MPK
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