Alloyed nickel-chromium-iron composite alloy for final deoxidizing in steel-making

Abstract

The invention belongs to the metallurgical field, in particular to an aluminum nickel chrome iron composite alloy for final deoxidization and alloying in steelmaking. The aluminum nickel chrome iron composite alloy solves the problems that a low alloyed steel containing Cr and Ni, alloy steel and steel grades with special use have uneven deoxidation effect, poor yield and complex deoxidation process and are suitable for the smelting need of the steel grade containing Als and nickel chrome. The aluminum nickel chrome iron composite alloy comprises the following compositions in percentage by weight: less than or equal to 0.5 percent of C, less than or equal to 3 percent of Si, less than or equal to 0.05 percent of P, less than or equal to 0.05 percent of S, 1 to 70 percent of Al, 1 to 60 percent of Ni, 1 to 60 percent of Cr and the balance being Fe. The aluminum nickel chrome iron composite alloy has low melting point, large specific gravity, no pulverization and no impurity. The smelting process is convenient to operate; final deoxidization has good deoxidization alloying effect, and the Ni yield is 100 percent; the Cr yield can reach 90 to 95 percent; the smelting yield of the steel grade is 100 percent; and the aluminum nickel chrome iron composite alloy can smelt the steel grade containing Ni and Cr and bring considerable economical benefit for enterprises.

Description

technical field [0001] The invention belongs to the field of metallurgy for steel alloys, in particular to an aluminum-nickel-chromium-iron composite alloy used for final deoxidation and alloying of steelmaking. Background technique [0002] With the rapid development of the iron and steel industry, the demand for stainless steel, alloy steel and special steel in all walks of life is increasing, and the quality requirements are getting higher and higher. In the past, the chromium and nickel alloys that need to be added were not easy to process in the production of these steel types, especially the nickel plate, which was very difficult to cut. When making steel, they had to be added to the converter together with the scrap steel. It is also necessary to make up molten iron and re-smelt steel, causing great losses. Ferrochromium should also be added to the converter at the end of refining when the carbon and temperature are suitable. It needs to be heated in advance to preve...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of aluminum-nickel-chromium-iron composite alloy that is used for final deoxidation and alloying of steelmaking, to solve the problem of uneven deoxidation effect in low-alloy steel, alloy steel and special-purpose steel grades containing Cr and Ni. The yield is not good, and the deoxidation process is troublesome