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[MW:1074] RE: 1073] The influence of flux TiO2, MnO and Al2O3 for weldingproperties

By Materials & Welding
Acicular ferrite, is a new term to me, is it some thing related to
improving toughness? (Though' I didn't remember but I read it somewhere
on a article related to underwater welding)
I am end user of consumables (and most of us) doesn't bother about the
chemistry of coatings in to that depth
I am curious to know what made you to change coating for 60XX series
rather than going for 70XX series to get better mechanical properties?

From the textbook reading I can say Tio2 is an arc stabilser, where as
Mno&Al2O3 are added for slag forming.

Wish you Good luck, and hope you will share your findings with us soon

Probably you could find some info for your research in the book Welding
metallurgy by George E. Linnert
-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of verry
Sent: Thursday, August 28, 2008 11:32 PM
To: Materials & Welding
Subject: [MW:1073] The influence of flux TiO2, MnO and Al2O3 for
weldingproperties


Dear Members

I have a problem with my reseach, i want to know the influence of
those flux ability to change the properties of weld metal. Know i was
found an advantage that flux TiO2 can increase the mechanical
properties of weld metal. from the AWS Standard they say that E6013
will have 430-460 MPa of minimum strength, but i had 508 MPa with
E6013 by adding flux TiO2 in electrode face.

My analysis now just from the mechanical test, i was find an acicular
ferrite structure in this research. But i don't know how the
accicular ferrite function for the mechanical properties of weld metal
and the theory of the influence of flux TiO2, MnO and Al2O3
accurately.

I need yours help for all members that want to partcipate.

thanks so much...

note : this research done in Mechanical Engineering Departmet,
University of Andalas, West Sumatra, Indonesia.

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