Dear Friends
For Aluminium welding following Good Engg practices are recommended
i) Humidity level preferably kept below 50% in case of Pur Al welding
ii) Tungstun electrodes are ground to rounded tip and NOT sharp one
iii) Use AC power source with DC suppressor
iv) Welding wire should be cleaned before welding, some time passivated by using hot caustic solution.
v) Weld edges should be smooth draw filed ( No serration )
vi) Some time Dye penetrant remains in pores causing Porosity if not cleaned properly . ( Hence Good old practice of Kerosene / chalk pwder being used in place of regular dye)
Regards
Hegde P.B.
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of kcrtechnical
Sent: Friday, August 06, 2010 9:09 AM
To: materials-welding@googlegroups.com
Subject: [MW:6323] Porosity in Aluminium welding Reg.,
Dear All,
What are all the probable reasons for getting porosity in aluminium welding, other than weather conditions, here both material and filler are 99.7% Pure Aluminium.
Please share with any type of reason.
K C R
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