Nitrided silicon-vanadium-iron alloy and production method thereof

A technology of ferro-silicon-vanadium nitride and ferro-silicon-vanadium, which is applied in the field of ferroalloys, can solve the problems of many types of reaction raw materials, many types of production raw materials, and poor compositional uniformity, so as to achieve fewer types of raw materials and avoid uneven mixing , Good product quality

Active Publication Date: 2015-07-15
攀枝花市仁通钒业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The calcination reaction of vanadium oxide and ferrosilicon is carried out in the solid state, and there are problems such as incomplete reaction, insufficient nitrogen enrichment, high residual oxygen content, low apparent density, and many types of raw materials for production; However, due to the use of ferrovanadium as raw material, the product quality may be slightly better than the former, but its production cost is higher
[0007] Chinese invention patent ZL201210433086.8 discloses a production method of ferrosilicon vanadium nitride, which uses ferrosilicon as raw material and performs calcination reaction with ferrosilicon to prepare ferrosilicon nitride products, but there are still many types of reaction raw materials and uniform composition. Poor adaptability and other problems, high production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take ferrosilicon-vanadium alloy containing 30wt% vanadium and 10wt% silicon, grind it until it passes through -100 mesh, then send it into a high-temperature self-propagating reactor, and vacuumize the reactor to 10 -2 Pa, fill in high-purity nitrogen with a purity of 99.9%, ignite after the pressure in the container reaches 6MPa, keep the pressure in the container at 6-12MPa, and finish the reaction after 30 minutes, continue to fill in nitrogen to cool for 15 minutes, and then take out the furnace, take a sample to detect its composition: 25.2wt %V, 8.7wt%Si, 13.1wt%N, apparent density is 5.3g / cm 3 , the molar ratio of nitrogen to vanadium is 1.89.

Embodiment 2

[0029] Take ferrosilicon-vanadium alloy containing 45wt% vanadium and 15wt% silicon, grind it until it passes through -120 mesh, then send it into a high-temperature self-propagating reactor, and vacuumize the reactor to 10 -2 Pa, fill in high-purity nitrogen with a purity of 99.99%, ignite after the pressure in the container reaches 6MPa, keep the pressure in the container at 6-12MPa, and finish the reaction after 45min; continue to fill in nitrogen to cool for 15min and then take it out of the furnace, and take a sample to detect its composition: 35.7wt %V, 11.9wt%Si, 18.3wt%N, apparent density is 5.8g / cm 3 , the molar ratio of nitrogen to vanadium is 1.87.

Embodiment 3

[0031] Take ferrosilicon-vanadium alloy containing 60wt% vanadium and 20wt% silicon, grind it until it passes through -140 mesh, then send it into a high-temperature self-propagating reactor, and vacuumize the reactor to 10 -2 Pa, filled with high-purity nitrogen with a purity of 99.999%; ignite after the pressure in the container reaches 6MPa, keep the pressure in the container at 6-12MPa, and finish the reaction after 35 minutes, continue to fill with nitrogen to cool for 15 minutes and then take it out of the furnace, take a sample to detect its composition: 45.7wt %V, 15.6wt%Si, 23.1wt%N, apparent density is 5.4g / cm 3 , the molar ratio of nitrogen to vanadium is 1.84.

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Abstract

The invention belongs to the technical field of iron alloy, and specifically relates to nitrided silicon-vanadium-iron alloy and a production method thereof. The provided nitrided silicon-vanadium-iron alloy is composed of the following components in percent by weight: 25-55 wt% of vanadium, 11-26 wt% of nitrogen, 8-20 wt% of silicon, and the balance iron and unavoidable impurities. The provided production method for the nitrided silicon-vanadium-iron alloy comprises: crushing the raw material silicon-vanadium-iron alloy, reacting with nitrogen under high temperature, and cooling to obtain the nitrided silicon-vanadium-iron.

Description

technical field [0001] The invention belongs to the technical field of iron alloys, and in particular relates to a silicon nitride ferro-vanadium alloy and a production method thereof. Background technique [0002] The most important technological progress in the iron and steel industry in recent years is the development and application of microalloying technology for iron and steel materials. The commonly used microalloying elements are niobium, vanadium, titanium and so on. They are usually added in the form of carbides or nitrides. From an economic point of view, they are also directly added to silicon-vanadium-iron alloys or silicon-vanadium-iron alloys. [0003] The industrial-scale application of a large number of vanadium-nitrogen microalloyed steel shows that only when vanadium exists in an effective combined state (vanadium nitride) in the steel can the mechanical properties of the steel be improved to the greatest extent. During the formation process, it has expe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/16C22C1/04
Inventor 陈守均陈守俊
Owner 攀枝花市仁通钒业有限公司
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