Aluminate-based selection of newly developed test agglomerated flux OKFlax10.72 alkalinity of 1.9. The flux characteristics can withstand the high current, and the application of high-speed welding. Diffusible hydrogen content of the weld metal ≤ 5ml/100g. AC and DC. Deposited metal -50 ° C low temperature notched impact toughness up to the requirements of the European standard. In the narrow groove (50 °), multi-layer Welding Alloys slag removal.
On the strength of the joint performance requirements, selection process test a OKAutrod12.22 wire. The higher silicon content of this wire have a beneficial effect on deoxidation of the weld pool metal and flux slag removal. The impurity content in the wire is controlled at a relatively low level, which is very important to guarantee the low temperature impact toughness.
Welding heat input
50 +5 ° sided V-groove welding test plate, the blunt edge of 3 ~~ 5 mm. Underlying weld submerged arc Welding Wire (parallel) to a single supply dual welding heat input 19kJ/cm filling layer and cover the surface with two pairs of two-wire serial arc submerged arc welding, the welding heat input 27kJ/cm The test panels preheat 125 ℃, most high-level inter-temperature 250 ° C. The total number of the weld bead of the weld 31.