Trailing Shield:
This is used for welding of highly reactive material like Titanium.
There are chances that these materials are prone to oxidation in hot condition even after solidifaction. To prevent that, a shield is attached to the welding torch in a trailing manner so that shielding gas will prevent the oxidation of the solidified hot weldment.
Single / Multiple Electrode technique is for SAW only where you can have two or more wires are being feeded in the same weld pool.
Reg,
Jaydeep
On Mon, Dec 20, 2010 at 9:49 AM, aslam khan <aslamkhan4u@gmail.com> wrote:
HI FRIENDS,
GOOD MORNING !
IN WPS GAS (QW-408) IT IS WRITTEN TRAILING SHIELD, CAN YOU SHARE YOUR
KNOWLEDGE ,WHAT IS TRAILING SHIELD ?AND
TECHNIQUE (QW-410 ),IT IS ALSO BE WRITTEN MULTIPLE OR SINGLE
ELECTRODE, IS THERE ANY TECHNIQUE BY WHICH WE CAN DO WELDING OF SMAW
AS MULTIPLE ELECTRODES?
THANKS IN ADVANCE
REGARDS
ASLAM
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