BF 45
Agglomerated Welding Flux
Description & applications
Agglomerated, neutral flux for cladding, joining of composite (clad metals) and hardfacing overlay applying the electroslag (RES) process in combination with appropriate strip electrodes of the high alloyed Cr- CrNi(Mo)- and NiCr(Mo) types. Based on its constant alloying vector without any Cr- and Ni- compensation- (the alloying vectors describe the difference in the chemical composition between the filler metall and the all-weld metal due to the influence of the flux)) the flux BF 45 can be used for many applications ranging from corrosion resistant overlay surfacing of chemical and nuclear plant components as well as for hardfacing of steel mill rolls, mainly for continuous caster rolls. The flux gives weld deposits with low hydrogen content due to its characteristics and the use of prefused raw materials. BF 45 exhibits smooth weld bead appearance and fine wetting action. Good slag removal without slag residuals in the first or the following layers, also on high preheated workpieces, are other features.
Classification
| EN 760 |
|---|
| SA FB 2 DC |
Typical weld metal composition (%)
| SiO2 | Al2O3 | CaF2 |
|---|---|---|
| 10 | 30 | 60 |
Packaging
25 kg PE-bag or 25 kg PE-coated aluminium bag
40 kg rubber-sealed steeldrum (on request)
Application Instructions
BF 45 can be used for joining and corrosion resistant surfacing of components for chemical plants and constructions where austenitic and NiCr(Mo) overlays are required. In combination with appropriate solid wire/strip-electrodes as commonly used for overlay procedures constant weld deposits with lower dilution rates (due to the RES-process) are achievable. Especially suitable for joint-surfacing (closing) of clad steels, produced by rolling, explosive cladding or welding. The characteristics of the flux BF 45 make it suitable especially for weld surfacing together with Nickel-Alloy strip electrodes such as type 82 / EQNiCr-3 (NiCr20Mn3Nb) or type 625 / EQNiCrMo-3 (NiCr22Mo9Nb). Another wide field of application is hard-facing together with appropriate Cr-/CrMo(Ni)-alloyed martensitic filler metals, including metal powder-cored wires/strips (MPCW) or sintered strip electrodes, for example hardfacing or continuous caster rolls or other steel mill rolls and crushers.
Flux Type
Fluoride-Basic
Flux Density
1.1 kg / dm³
Grain Size
2-14; Tyler 12 x 68
Current-Carrying Capacity
1500 A DC using one strip electrode 60 x 0.5 mm
Storage and redrying
The flux is to be handled and stored according to our recommendations. For corrosion resistant austenitic sur-facing of components flux redrying can be neglected if the flux is stored under properly maintained and controlled storage conditions. If, however, redrying is necessary the flux has to be redried at 150 to 250°C effective flux temperature.