Composite cored wire composed of solid calcium metal, silicon iron and titanium-silicon nitride alloy containing rare earth, barium and molybdenum

Abstract

The invention relates to an alloy cored wire, in particular to a composite cored wire composed of solid calcium metal, silicon iron and titanium-silicon nitride alloy containing rare earth, barium and molybdenum. The cored wire comprises a core layer and a steel sheet layer wrapping the core layer. A meshed supporting layer made of steel or iron is arranged between the core layer and the steel sheet layer. The core layer comprises a silicon iron and titanium-silicon nitride alloy powder layer, a middle protecting layer and a solid calcium metal wire, wherein the solid calcium metal wire is wrapped with the middle protecting layer; the silicon iron and titanium-silicon nitride alloy powder layer wraps the middle protecting layer and is composed of silicon iron powder and titanium-silicon nitride alloy powder containing rare earth, barium and molybdenum; the particle size of the silicon iron powder and the particle size of the titanium-silicon nitride alloy powder are both below 3 mm; and the mass ratio of the solid calcium metal wire to the silicon iron powder to the titanium-silicon nitride alloy powder containing rare earth, barium and molybdenum is 1:(1-2):(2-5). Compared with a conventional calcium metal wire, the composite cored wire has the advantages of being higher in yield, longer in preservation time and more stable in yield, and also has significant economic benefits.

Description

technical field [0001] The invention relates to an alloy cored wire. Background technique [0002] my country is a big country of iron and steel, but the quantity and variety of high-quality steel account for a relatively small proportion, which not only cannot meet the requirements of my country's economic construction and national defense construction, but also causes a serious waste of resources, resulting in continuous increase in the cost of iron and steel smelting. The fundamental way to solve the above problems is to adopt the new metallurgical discipline that appeared in the 1970s—microalloying technology, that is, adding a small amount (0.001%-0.1%) of alloying elements to the steel can improve the properties of the steel (such as high Strength, high toughness, good weldability and corrosion resistance) have been significantly improved, while saving precious alloying elements to reduce costs, which is an important sign of the transformation from traditional steel pr...

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of solid metal calcium, ferrosilicon and containing rare earth, barium, molybdenum titanium nitride silicon alloy compound cored wire, by adopting the method for cored wire to add alloy and calcium in the microalloyed steel not only It can solve the problem of low recovery rate, and has the advantages of higher recovery rate, longer storage time and more stable recovery rate than conventional solid calcium metal wire, and has significant economic benefits