Alloy cored wire containing rare earth, calcium, barium, molybdenum and high-titanium titanium-silicon nitride

Abstract

The invention relates to an alloy cored wire, in particular to an alloy cored wire containing rare earth, calcium, barium, molybdenum and high-titanium titanium-silicon nitride. The cored wire comprises a core layer, and a steel sheath layer wrapping the exterior of the core layer; the core layer is composed of alloy powder, wherein the particle size of the alloy powder is smaller than 3 mm, and the alloy power contains rare earth, calcium, barium, molybdenum and high-titanium titanium-silicon nitride; a net-shaped supporting layer made from steel or iron is arranged between the core layer and the steel sheath layer; the alloy power containing rare earth, calcium, barium, molybdenum and high-titanium titanium-silicon nitride is composed of, by mass percentage, 1.0-2.5% of Al, 5-15% of N, 2.5-5.0% of Mn, 1.0-2.5% of Mg, 40-50% of Ti, 25-35% of Si, 5-10% of Ca, 0.5-1.0% of Mo, 0.5-1.0% of Ba, 1.0-2.0% of a rare earth element, smaller than or equal to 0.1% of P, smaller than or equal to 0.1% of S and the balance Fe. The alloy powder is added into microalloyed steel in a cored wire method, the problem that the recycling rate is low can be solved, the using amount of ferrosilicon and ferromanganese can also be reduced, application of titanium-silicon nitride and a cored wire alloy thereof is developed, and remarkable economic benefits are achieved.

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

[0006] The purpose of the present invention is to provide a cored wire containing rare earth, calcium, barium, molybdenum and high titanium nitride silicon alloy, which can not only solve the problem of low recovery rate by adding the cored wire to the microalloyed steel , and can also save the use of ferrosilicon and ferromanganese, and develop the application of titanium nitride silicon and its cored wire alloy, which has significant economic benefits