Aluminium calcium manganese titanium iron alloy for steel-smelting deoxygenation and alloying

Abstract

An Al-Ca-Mn-Ti-Fe alloy for deoxidizing and alloying in smelting steel is provided. The chemical components (in % by weight) are as follows: Al20-70, Ca2-30, Mn2-30, Ti0.5-5, Fe and impurity.

Description

1. Technical field [0001] The invention relates to a ferroalloy, in particular to an aluminum-calcium-manganese-titanium-iron alloy used for final deoxidation and alloying of steelmaking. 2. Background technology [0002] Chinese patent ZL98120546.1 discloses a kind of aluminum-manganese-titanium-iron alloy used for final deoxidation and alloying of steelmaking. Its chemical composition (weight %) is: AI30-70, Mn4-30, Ti1-10, and the balance is Fe and Unavoidable impurities. The alloy is widely used because of its good deoxidation ability, not easy to pulverize, and no need to add titanium element when smelting titanium-containing low-alloy steel and micro-alloy steel, but its disadvantage is that its deoxidation product AI 2 o 3 The inclusions formed in the steel form strips, and their non-plasticity will reduce the impact toughness and elongation of the steel. Also, since the AI 2 o 3 It has a high melting point, and it is easy to condense during molten steel casting,...

AI Technical Summary

Problems solved by technology

The alloy is widely used because of its good deoxidation ability, not easy to pulverize, and no need to add titanium element when smelting titanium-containing low-alloy steel and micro-alloy steel, but its disadvantage is that its deoxidation product AI 2 o 3 The inclusions formed in the steel are in the form of strips, and their non-plasticity will reduce the impact toughness and elongation of the steel

Also, since the AI 2 o 3 High melting point, easy to condense during molten steel casting, block the nozzle, especially unfavorable for continuous casting