Silicon nitride ferrovanadium and production method thereof

Abstract

The invention discloses silicon nitride ferrovanadium, which comprises the following components in percentage by weight: 15 to 50 percent of vanadium, 10 to 40 percent of silicon, 8 to 30 percent of nitrogen, 4 to 30 percent of iron, less than or equal to 1 percent of carbon, less than or equal to 0.01 percent of aluminum, less than or equal to 0.05 percent of sulfur, and less than or equal to 0.05 percent of phosphor. Compared with the prior art, the product combines high nitrogen content of the silicon nitride and microalloying effect of vanadium nitride, and overcomes the defects that the silicon nitride has high melting point and small density, and is completely decomposed and overflowed in high temperature molten steel, and the nitrogen content of the vanadium nitride is low; and compared with the vanadium nitride products, the product has higher nitrogen content, and according to the proportion of silicon and vanadium, the nitrogen content reaches 22 to 30 percent. Compared withsilicon nitride products, the composite nitrides have low melting point and large density, and are advantageous to absorption of molten steel. When the silicon nitride ferrovanadium is used in steel making production, the nitrogen content in the steel can be effectively improved, and the steel can be microalloyed.

Description

technical field [0001] The invention relates to a silicon nitride ferro-vanadium alloy and a production method thereof. It belongs to the field of ferroalloy technology. The alloy is used for nitrogen increase and microalloying in the steelmaking process, and the product form is silicon nitride iron vanadium. Background technique [0002] Various research materials have shown that nitrogen plays an important role in the precipitation of carbonitrides in microalloyed steels. Therefore, research on nitrogen has attracted more and more attention. Nitrogen exists in the form of compounds in vanadium-containing steel, and its main function is to strengthen the effect of precipitation strengthening and grain refinement of vanadium. [0003] There are many kinds of nitrides. The nitrides of metal vanadium, manganese, chromium, titanium, aluminum, silicon and the above iron alloys are commonly used in metallurgy. Due to their different performance characteristics, their preparation...

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Problems solved by technology

[0007] However, the above inventions are all made of silicon nitride or vanadium nitride alone, and have not fully considered the technical requirements of fast nitrogen increase and stable nitrogen absorption required by the characteristics of steelmaking production.