Solid metal calcium and composite core-spun yarn containing rare earth, niobium, vanadium and boron high-titanium titanium-silicon nitride alloy powder

Abstract

The invention relates to an alloy core-spun yarn, and particularly relates to solid metal calcium and a composite core-spun yarn containing rare earth, niobium, vanadium and boron high-titanium titanium-silicon nitride alloy powder. The core-spun yarn comprises a sandwich layer and a sheet iron layer, wherein the sheet iron layer wraps the sandwich layer, a steel or iron net support layer is arranged between the sandwich layer and the sheet iron layer, the sandwich layer comprises a titanium-silicon nitride alloy powder layer, a middle protective layer and a solid calcium metal wire, the middle protective layer wraps the solid calcium metal wire, the titanium-silicon nitride alloy powder layer wraps the middle protective layer, the mass ratio of the solid calcium metal wire to the titanium-silicon nitride alloy powder layer is 1:(2 to 5), and the titanium-silicon nitride alloy powder layer is made of rare earth, niobium, vanadium and boron containing high-titanium titanium-silicon nitride alloy powder of which the particle size is below 3 mm. A method of the core-spun yarn is adopted, so that alloy and calcium are added to microalloyed steel, the problem of low recovery rate can be solved, and additionally, compared with a conventional solid calcium metal wire, the composite core-spun yarn has the advantages of high yield, long storage time and stable yield and has obvious 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 purpose of the present invention is to provide a composite cored wire of solid metal calcium and high-titanium nitride silicon nitride alloy powder containing rare earth, niobium, vanadium, boron, and alloy and calcium are added to microalloyed steel by adopting the method of cored wire It can not only solve the problem of low recovery rate, but also 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.