Al-Si-Mn alloy and its preparing process

Abstract

An AlSiMn-alloy contains A (19-21 wt.%), Si (16-20 wt.%), Mn (48-52 wt.%), C (0-1.8 wt.%), P (0-0.25 wt.%), S (0-0.04 wt.%) and Fe (rest), and is prepared through thermal resmelting, slogging to remove carbon, adding Al and Si, fastly casting ingots, demoulding, cooling in air. Its advantages are short smelting time and less consumption of Al.

Description

Technical field [0001] The invention relates to a deoxidizer and additive for steelmaking and a preparation method thereof, in particular to an aluminum-silicon-manganese alloy and a preparation method thereof. Background technique [0002] At present, the demand for manganese-containing alloy steel series products, especially pipeline steel, is increasing day by day. Deoxidation and alloy addition of pipeline steel smelting are important processes for preparing suitable qualified steel products. Traditional steelmaking deoxidizers generally use single silicon, manganese or pure aluminum for deoxidation. The effect of these single elements as deoxidizers is poor. There are many non-metallic inclusions in the smelted steel, and the steel quality is not good. As one of the metallurgical materials, the composite deoxidizer has a better deoxidation effect than the single element, and this fact has long been recognized by the steelmaking industry. Among them, aluminum-silicon-ma...

AI Technical Summary

Problems solved by technology

However, the aluminum-manganese-silicon alloy of this composition cannot be produced in the submerged arc furnace. Even if the silicon-manganese alloy with low aluminum and high manganese or high manganese and high aluminum is produced, the cost is quite high. Defects such as difficulty in storage