Robert Mullins
Member
- Messages
- 222
- Location
- Salisbury, uk
We welders at work have been asked if we've used metal cored wires before, and for our comments and opinions:
I have used them, at VT shipbuilding, Hanson's aggregates and AMG Engineering; at Hanson's and AMG the work was the refurbishment/overhaul of marine dredging equipment and BOC CORAMIG was specified for the welding of the 'abbro' wear resistant plate (although a bohler thyssen wire of the same specification superceded the CORAMIG due to its being vastly less expensive)
Downhand was always via the spray transfer mode, dip transfer spattered/spatters so much as to create huge amounts of extra cleaning work:
I've read up on metal cored wires in my 7th edition 'science & practice of welding' where little is said apart from what it is, and how it's made:
My manager and myself had a brief discussion about these wires, apparently the wire tube carries the electrical current up the outside of the wire and this creates a wider, bell shaped arc allowing better side wall fusion, and the powder core equates to a more molten, fluid weld pool:
After all this rambling, my question is, " why are metal cored wires so much more penetrating than solid wires?"
I have used them, at VT shipbuilding, Hanson's aggregates and AMG Engineering; at Hanson's and AMG the work was the refurbishment/overhaul of marine dredging equipment and BOC CORAMIG was specified for the welding of the 'abbro' wear resistant plate (although a bohler thyssen wire of the same specification superceded the CORAMIG due to its being vastly less expensive)
Downhand was always via the spray transfer mode, dip transfer spattered/spatters so much as to create huge amounts of extra cleaning work:
I've read up on metal cored wires in my 7th edition 'science & practice of welding' where little is said apart from what it is, and how it's made:
My manager and myself had a brief discussion about these wires, apparently the wire tube carries the electrical current up the outside of the wire and this creates a wider, bell shaped arc allowing better side wall fusion, and the powder core equates to a more molten, fluid weld pool:
After all this rambling, my question is, " why are metal cored wires so much more penetrating than solid wires?"