1.Profile：
Flux
cored wire was so called tubular wire, could be apply on auto or semi-auto
welding procedure. In accordance America Welding Society (AWD) classification
as following chart：
|
Covered
type
Character
|
Classification
|
Gas Shield
|
Self Shield
|
|
|
With Slag
|
With Slag Basic type
|
Metal Cored
|
With Slag
|
|
|
AWS A5.20
|
E70T-1C
E71T-1C
E71T-1M
|
E71T-5C
E71T-5M
|
AWS 5.18
E70C-6C
E70C-6M
|
E70T-4
E70T-7
E71T-8
E71T-11
E71T-GS
|
|
|
AWS A5.36
|
E70T1-C1A0-CS1
E71T1-C1A0-CS1
E71T1-M21A0-CS1
|
E71T5-C1A2-CS1
E71T5-M21A2-CS1
|
E70T15-C1A4-CS1
E70T15-M21A4-CS1
|
E70T4-AZ-CS3
E70T7-AZ-CS3
E71T8-A2-CS3
E71T11-AZ-G
E71TGS-AZ-G
|
|
|
Weldability
|
Spatter
|
Ⓞ
|
○
|
○
|
△
|
|
Slag removable
|
Ⓞ
|
○
|
－
|
△
|
|
溶滴狀態
|
Ⓞ
|
○
|
○
|
△
|
|
Smoke
|
○
|
○
|
Ⓞ
|
△
|
|
Mechanical result
|
Weld Bead Inspection
|
○
|
Ⓞ
|
Ⓞ
|
△
|
|
Welding Speed
|
○
|
○
|
Ⓞ
|
○
|
|
Welding efficiency
|
○
|
○
|
Ⓞ
|
○
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Ⓞ: Good ○: Fair △: Poor －: Not acceptable
2.Working instruction：
(1)FCAW Storage & Handling:：
① FCAW had been packed by plastic spool /basket wire forms, coil and pail pack (drum packing). To maintain the integrity of these products, electrodes must be protected from the atmosphere. All flux cored electrodes, regardless of package, should be protected from condensation. TO ensure that
condensation does not form on the product, it is recommended that the electrode
be stored in an environment that is kept above the dew point temperature for a
given relative humidity.
②Most of tubular wire type of overlapping, but seems likely more absorb moisture
easily than seamless wire. In case of exposed to damp
moisture conditions or extremes in temperature, it is recommended to use
aluminum foil packing.
③In order to avoid humidity where surface
condensation occur porosity issue. When not in use, wire should be placed in
original packaging and sealed as best as possible.
(2)Caution：
①Because flux-cored wire is softer than solid wire,
knurled drive rolls provide a good “bite” on the wire without compressing and
deforming it – which could happen if standard roll are used.
②Horizontal
and overhead position recommend forehand welding would be appearance perfect
welding bead. But please also make sure the welding condition to avoid poor
penetration.
③For vertical down and filler metal welding
position, recommend use single pass moving or little waving for button layer.
④FCAW
easily caused porosity than MIG wire welding due to working piece in bad
clearance. Make sure groove clean and recommend using iron powder type products
(E70T-1C) for application.
⑤The
welding condition with MIX GAS shielding is more sensitive above working piece
clearance. Therefore, appropriate AMP and VOLT need to be avoided welding arc
length getting too long.
⑥Fore
metal cored wire recommends using 80%Ar+20%CO2 gas shielding by spray arc welding. Add pulse mode
for welding management would get better bead quality.
