Al-Mn-Fe Alloy

With the rapid development of the steel industry, the variety of steel deoxidizer is also more and more, but whether it is Si-Al-Fe or Al-Si-Ba-Fe, etc., the true melting point, specific gravity, boiling point and affinity with oxygen are not ideal, making the role of aluminum in the alloy is greatly reduced. The density of ferromanganese aluminum is 5.7g/cm3, much larger than the specific gravity of steel slag, slightly smaller than the specific gravity of liquid steel, so it is obviously slowed down the floating speed, very few to melt ferromanganese aluminum, will not be crowded out to the surface of the slag layer like aluminum, and suspended in the liquid steel. And the existence of aluminum and manganese composite deoxidation reaction, the formation of a manganese-rich zone around the aluminum, improving the solubility of aluminum and equivalent aluminum deoxidation capacity, and generate low melting point of the composite deoxidation products, greatly reducing the content of inclusions in the steel in the continuous casting has a tendency to reduce the water mouth of the tumor. Therefore, the use of aluminum manganese iron final deoxidation, can optimize the deoxidation, improve the intrinsic quality of steel, effectively reduce the cost of steelmaking deoxidation, with obvious economic and social benefits.

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Product Description

Aluminum-manganese ferro alloy is an alloy composed of manganese, silicon, iron and a small amount of carbon and other elements, and it is a kind of ferroalloy with wider use and larger production. Its consumption accounts for two of the electric furnace ferroalloy products. Silicon and manganese in the silicon manganese alloy and oxygen affinity is stronger, the use of silicon manganese alloy in steelmaking, produced by the deoxidation products MnSiO3 and MnSiO4 has a low melting point, particles, easy to float, deoxidizing effect and other advantages. In the same conditions using manganese or silicon alone deoxidation, its burn rate is 46 and 37, respectively, and with silicon and manganese alloy deoxidation, the two burn rate is 29. therefore, it has been widely used in steelmaking, its production growth rate is higher than the average growth rate of ferroalloys, and it has become an indispensable composite deoxidizer and alloying agent for the iron and steel industry. Silicon-manganese alloys containing less than 1.9 carbon are also used as semi-finished products for the production of medium-low carbon ferromanganese and electro-silicon thermal method of manganese metal. In the ferroalloy production enterprises, the silicomanganese alloy used for steelmaking is usually called commercial silicomanganese alloy, the silicomanganese alloy used for smelting low carbon iron is called self-silicon manganese alloy, and the silicomanganese alloy used for smelting metal is called high-silicon manganese alloy. Manganese can be synthesized into silicides MnSiO3, MnSiO and MnSiO3 with silicon, because the negative value of free energy generated by manganese silicides is much larger than the negative value of free energy produced by manganese carbide, the higher the content of silicon in silicomanganese alloys is, the lower the carbon content is.

牌号	化学成份 %
	Mn	Si	C ≤	P≤		S≤
	Mn	Si	C ≤	Ⅰ	Ⅱ	Ⅲ
FeMn64Si27	60～67	25～28	0.5	0.10	0.15	0.25	0.04
FeMn67Si23	63～70	22～25	0.7	0.10	0.15	0.25	0.04
FeMn68Si22	65～72	20～23	1.2	0.10	0.15	0.25	0.04
FeMn64Si23	60～67	20～25	1.2	0.10	0.15	0.25	0.04
FeMn68Si18	65～72	17～22	1.8	0.10	0.15	0.25	0.04
FeMn64Si18	60～67	17～20	1.8	0.10	0.15	0.25	0.04
FeMn68Si16	65～72	14～17	2.5	0.10	0.15	0.25	0.04
FeMn64Si16	60～67	14～17	2.5	0.20	0.25	0.30	0.05