Silicon chromium alloy is an alloy of iron, chromium and silicon containing not less than 30.0% chromium and not less than 35.0% silicon. Its production process is divided into two types: one-step method (usually called "slag-containing method" or "ore method") and two-step method (usually called "slag-free method"). The raw materials used in one-step smelting include silica, chromium ore and coke. The raw materials used in the two-step smelting include silica, carbon ferrochrome, and steel scraps. Both smelting methods use coke as the reducing agent.

The source of silicon in the alloy is mainly SiO2 in silica, and the sources of chromium are chromium ore and carbon ferrochrome. They are all produced by smelting in ferroalloy submerged arc furnaces. It is mainly used as a reducing agent for the production of medium-low carbon ferrochrome and micro-carbon ferrochrome and as an intermediate alloy agent for steelmaking. According to the content of Si, Cr, and C, ferro silicon chrome alloys can be divided into many different brands of ferro silicon chromium alloys. The composition phase of its alloy system is, Si>50% is composed of (Fe·Cr)Si2, Si>40% is composed of (Fe·Cr) Si2 and (Fe·Cr)Si, Si>30% is composed of (Fe· It is composed of Cr)Si and (Fe·Cr)Si. When Si<19%, (Fe·Cr)3C and (Fe·Cr)23C6 account for the majority.

Silicon Chromium Alloy

chemical composition

Brand	Chemical Composition %
	Si	Cr	C	P		S
	Si	Cr	C	I	II	S
	≥		≤
FeCr30Si40-A	40.0	30.0	0.02	0.02	0.04	0.01
FeCr30Si40-B	40.0	30.0	0.04	0.02	0.04	0.01
FeCr30Si40-C	42.0	30.0	0.06	0.02	0.04	0.01
FeCr30Si40-D	42.0	30.0	0.10	0.02	0.04	0.01
FeCr32Si35	35.0	32.0	1.0	0.02	0.04	0.01

Since the phase composition of SiCr alloy determines the carbon reduction effect outside the furnace, in industrial production, the Si content in FeSiCr alloy is generally controlled to be greater than 40%. The C content of siliconchromium alloys released from the furnace is generally 0.2-0.8%, which is difficult to use directly. It must undergo carbon reduction treatment outside the furnace. The C content of the alloy can be reduced to less than 0.02%. Different grades of silicon chrome alloys are refined according to user requirements. In addition, ferrosilicon is added to liquid high-carbon ferrochromium to produce ferrosiliconchromium alloy.

ferro Silicon chrome alloy plays an important role in steel production and smelting.

The main application areas include:

Deoxidizer and reductant

The silicon and chromium contained in silicon-chromium alloy can effectively remove impurities such as oxides and sulfides in steel and improve the purity of steel;

Alloy additive

It is one of the important components of steel alloy. Adding a certain amount of silicon-chromium alloy can enhance the physical properties of steel, such as strength and toughness;

Casting material

It can be used as casting material, as well as raw materials for the production of stainless steel, alloy steel, heat-resistant alloy and other materials.

Silicon Chromium Alloy