Aluminium killed steel deoxidizer - alfer

Abstract

The present invention present invention belongs to the field of steel-smelting technology. The Al-Fe alloy as deoxidizer is suitable for use in producing low-silicon degasified steel, converter No. 45 steel and pipe steel. The Al-Fe alloy as deoxidizer has the chemical components of Al 40-60 wt%, Fe 37-57 wt%, Mn 0.1-10 wt%, Si 0.1-8 wt%, Ti 0.1-10 wt%, C 0.1-1.0 wt%, P 0.001-0.1 wt% and S 0.001-0.1 wt%. It has high chalking resistance, high deoxidizing capacity, low cost, less ablation, high yield and high aluminum utilization, and can reduce bubble generated at most, fine steel structure crystal grain, raise the shock resistance of steel and lower cold brittleness and age tendency.

Description

technical field [0001] The invention belongs to the field of steelmaking, and is especially suitable for the production of aluminum killed steel, converter 45# steel and pipeline steel. Background technique [0002] Pure aluminum has always been the main deoxidizer in the steelmaking industry. It is used in the production of killed steel grades with high ductility and high stamping properties, especially low-carbon killed steel grades suitable for making cold-rolled sheets. process, instead of using ferrosilicon and ferromanganese as deoxidizers, because elements such as silicon and manganese are strictly controlled elements when smelting this type of steel; moreover, this type of steel requires more aluminum elements to deoxidize crystal grains. However, since the specific gravity of aluminum is much smaller than that of molten steel, when the molten steel is deoxidized and alloyed, it floats on the surface of the molten steel, which is easy to oxidize and burns a lot, whi...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that aluminum-iron alloys are easily pulverized in the atmosphere, so that they cannot be used