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Subject: Re: TIG WELDING ALUMINIUM DC Author: Rens [ Next Thread | Previous Thread | Next Message | Previous Message ] Date Posted: 07:09:03 09/30/02 Mon In reply to: Wynand 's message, "TIG WELDING ALUMINIUM DC" on 13:16:04 08/24/02 Sat It is not clear to me if you are welding with electrode positive or negative. If welding with electrode positive (so a very good "cleaning" of the material), commonly used for wedling thin plate take care that you should use thick electrodes (90 A allready require a 6.4 mm electrode) and very well pointed. If welding with electrode negative (usually for DC welding) and the use of 99.9 Argon you will have a poor penetration as the energy of the Argon arc is insufficient to break the oxides. The arc wanders around in the manner you describe. Therefore you should use a Argon-Helium mix (30 to 50% Helium) and a doped electrode (ThO2). However this is not really suitable for welding thin plate. I suggest therefore to go for DC with electrode positive and a thick electrode or use AC. [ Next Thread | Previous Thread | Next Message | Previous Message ]

Replies:

Subject Author Date Re: TIG WELDING ALUMINIUM DC alan clarke 07:27:37 11/20/02 Wed Re: TIG WELDING ALUMINIUM DC jim barnes 11:07:38 10/01/03 Wed Re: mig brazing of copper -- sridhar, 17:50:57 10/02/03 Thu Re: mig brazing of copper -- Tom Jones, 20:24:40 04/19/04 Mon Re: TIG WELDING ALUMINIUM DC brian ludbrook 13:21:26 10/09/03 Thu