The production process of low alloy steel cored wire with potassium cryolite

At present domestic engineering machinery steel strength level enhances unceasingly, Q690Q800 such as widening the application range of the high strength level of the steel plate, but the Gao Jiangban matching with welding material market supply is less, and the current market supply of form a complete set of welding materials exist poor mechanical properties of welded joint, the weld metal of low elongation, impact toughness at low temperature is low, especially in ship and ocean engineering in heavy plate (1025 mm), high strength steel welding technology of low alloy high performance flux cored wire.

The process of welding wire by weight percentage include: rutile by 3050%;

Calcium oxide or magnesium oxide or mixture of two kinds of 58%;
Potassium feldspar 26%;

Sodium fluoride, sodium cryolite, potassium cryolite one or more of the mixture of 25%;

Zircon sand 26%;

Containing chromium alloy powders converted into Cr: 02%;

Containing manganese alloy powders converted into Mn1520 %;

Containing molybdenum alloy powders converted into Mo: 02%;

Vanadium alloy powders or V: 03%;

Alloy powder containing niobium (Nb: 03%;

Boron alloy powders or B: 0;

Rare earth alloy is 05%;

Titanium iron 26%;

Nickel powder, 24%;

Allowance for iron powder.