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Silicon chromium alloy

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Silicon chromium alloy is an alloy composed of two elements: silicon and chromium. It is usually used in steel smelting and casting to improve the characteristics and properties of steel.The main function of silicon chromium alloy is to enhance the wear resistance, corrosion resistance, and oxidation resistance of steel. It can improve the hardness of steel and maintain stability at high temperatures, so it is widely used in the manufacturing of refractory materials, stainless steel, alloy steel, and other fields.
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It is a ferroalloy composed of silicon, chromium, and iron. Also known as silicon-ferrochrome. It is mainly used as an electrosilicon thermal method for the production of medium, low and micro carbon ironMaster alloys。 It is used as a deoxidizer (instead of ferrosilicon) and chromium additive in steelmaking. Generally, it contains 30% Cr> and 35% > Si, and the balance is iron and a small amount of impurities. According to the classification of carbon content, such as carbon ≤ 0.06%, ≤ 0.10%, ≤ 1.0%, etc. 

Alloys of iron, chromium and silicon with a chromium content of not less than 30.0% and a silicon content of not less than 35.0%. There are two types of production processes: a one-step process (often referred to as the "slag process" or "ore process") and a two-step process (often referred to as the "slag-free process"). The raw materials used in one-step smelting are silica, chrome ore and coke. The raw materials used in the two-step smelting are:silica, carbon ferrochrome, steel scraps. Both smelting methods use coke as a reducing agent.


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The source of silicon in alloys is mainly SiO in silica2The sources of chromium are chrome ore and carbon ferrochrome, respectively. All of them are smelted in a ferroalloy submerged arc furnace. It is mainly used in the production of medium and low-carbon ferrochrome, micro-carbon ferrochrome reducing agent and steelmakingMaster alloysDose. According to the silicon-chromium alloy containing Si, Cr, C, it can be divided into a variety of different grades of silicon-chromium alloy. The composition of the alloy system is as follows, and 50% of the Si> is composed of (Fe· Cr)Si240% of Si> composed of (Fe· Cr) Si2and (Fe· Cr)Si, containing 30% of Si> composed of (Fe· Cr)Si and (Fe· Cr) Si composition, Si < 19% (Fe· Cr)3C and (Fe· Cr)23C6Majority.

Because the phase composition of silicon-chromium alloy determines the effect of carbon reduction outside the furnace, the Si content in silicon-chromium alloy is generally controlled to be greater than 40% in industrial production. The C content of the silicon-chromium alloy produced by the furnace is generally 0.2-0.8%, which is difficult to use directly, and it must be treated by carbon reduction outside the furnace, and the C content of the alloy can be reduced to less than 0.02%, and different grades of silicon-chromium alloy can be refined according to user requirements. In addition, ferrosilicon is added to a liquid high-carbon ferrochrome to produce silicon-chromium alloys.

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The products include ferrosilicon, calcium silicate cored wire, ferrovanadium, silicon manganese, ferromolybdenum, ferrotitanium, ferrochrome, ferromanganese, metallic silicon and other materials, which can meet the needs of different industries and customers.

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