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Preparation method of vanadium nitride and nitride ferrovanadium alloy reinforcing agent

A technology for nitriding vanadium ferroalloy and reinforcing agent is applied in the field of preparation of vanadium nitride and vanadium nitride ferroalloy reinforcing agent, and can solve the problems of poor stability of performance strengthening effect, low performance standard rate of steel and high process sensitivity , to achieve the effect of promoting strengthening effect, high bonding rate and reducing cost

Inactive Publication Date: 2018-06-01
马鞍山市恒兴耐火炉料厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the low utilization rate of vanadium, high process sensitivity, poor stability of performance strengthening effect, low rate of steel performance compliance and high application cost when adding vanadium nitride or ferrovanadium nitride in the existing molten steel alloying process, The present invention provides a vanadium nitride and ferrovanadium nitride alloy reinforcing agent and its preparation method and application. On the one hand, nitrogen-fixing alloy elements such as Si and Mn are preferred, and N is allowed to form nitrides with them. N exists in an ion state, and two It is to screen and optimize the composition ratio of nitrogen-fixing elements in order to combine with nitrogen to the greatest extent. The third is to test and select the preparation method of nitriding treatment in order to obtain high nitriding efficiency and obtain nitrides with stable physical state, and give full play to its strengthening effect, making it The enhancement effect is fully reflected in the application process of vanadium nitride and ferrovanadium nitride

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Select raw materials, metal silicon and ferrosilicon, and crush and grind them separately to obtain fine materials with a particle size of ≤0.2mm. The mass fractions of each component of the selected metal silicon are: Si: 96%, Fe: 1.8%, Al: 0.03%, C: 0.05%, P: 0.05%, S: 0.06%, and the balance is unavoidable impurities. The mass fraction of each component of ferrosilicon is: Si: 72%, Al: 0.3%, Mn: 0.7%, C: 0.12%, P: 0.10%, S: 0.12%, and the balance is Fe and unavoidable impurities.

[0038] (2) Proportioning the fine material obtained from the processing in (1), then adding 1.5% (mass fraction) binder to fully mix and granulate, and the particle size is ≤4.0mm. Binder: polycarbosilane 31%, silicic acid sol 60%, antelope methyl cellulose 9%.

[0039] (3) Put the granular material made in (2) into a drying furnace to heat, control the temperature to 350° C., and simultaneously fill the furnace with nitrogen gas with a purity of 99.0%, and keep the temperature for 6 h...

Embodiment 2

[0047] (1) Select raw materials, silicomanganese and metal silicon, and crush and grind them separately to obtain fine materials with a particle size of ≤0.35mm. The mass fraction of each component of silicon-manganese selected is: Si: 17%, Mn: 65%, Al: 0.3%, C: 3.2%, P: 0.15%, S: 0.20%, the balance is Fe and unavoidable Impurities. The mass fraction of each component of metal silicon is: Si: 97.4%, Fe: 1.6%, Al: 0.21%, C≤0.04%, P≤0.04%, S≤0.05%, and the balance is unavoidable impurities.

[0048] (2) Proportioning the fine material obtained in (1), then adding 1.6% (mass fraction) of a binder to fully mix and granulate, and the particle size is ≤4.0mm. Binder: polycarbosilane 42%, silicic acid sol 46%, antelope methyl cellulose 12%.

[0049] (3) Put the granular material made in (2) into a drying furnace to heat, control the temperature to 300° C., and simultaneously fill the furnace with nitrogen gas with a purity of 99.0%, and keep the temperature for 8 hours.

[0050] (...

Embodiment 3

[0055] (1) Select raw materials, ferrosilicon, ferromanganese, ferrotitanium, and ferrochrome, and crush and grind them separately to obtain fine materials with a particle size of ≤0.3mm. The mass fraction of each component of ferrosilicon selected is: Si: 70%, Al: 0.9%, Mn: 0.5%, C: 0.3%, P: ≤0.09%, S≤0.10%, the balance is Fe and unavoidable of impurities. The mass fraction of each component of ferromanganese is: Si: 2.0%, Mn: 70%, Al: 0.25%, C: 6.0%, P≤0.20%, S≤0.03%, and the balance is Fe and unavoidable impurities. The mass fraction of each component of ferro-titanium is: Ti: 69%, Si: 1.2%, Mn: 1.5%, Al: 5.0%, C: 0.4%, P≤0.05%, S≤0.04%, and the balance is Fe and unavoidable impurities. The mass fraction of each component of ferrochrome is: Cr: 52%, Si: 3.0%, C: 2.0%, P≤0.06%, S≤0.05%, and the balance is Fe and unavoidable impurities.

[0056] (2) Proportioning the fine material obtained in (1), then adding 1.2% (mass fraction) of binder to fully mix and granulate, and t...

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Abstract

The invention discloses a preparation method of a vanadium nitride and nitride ferrovanadium alloy reinforcing agent and belongs to the field of special alloy materials. The reinforcing agent is composed of 23-66% of Si, 0.1-17.5% of Mn, 11-37% of N, 0-9.6% of Ti, 0-7.3% of Cr, 0.03-5.6% of Al, 0.1-1.9% of C, less than or equal to 0.10% of P, less than or equal to 0.15% of S, and the balance Fe and impurities. A solid nitride alloy element like silicon and manganese is preferably used and forms a nitride together with N, and the preparation method mainly has the following characteristics that1, the rate of bonding with nitrogen is high, 2, the method benefits molten steel without harm, and 3, molten steel deoxidation and desulfuration are facilitated to optimize the thermodynamic environment of the vanadium nitride and nitride ferrovanadium microalloying, more nitrogen ions can be cured, and the utilization rate of the alloy elements is greatly improved.

Description

[0001] The present invention is an application number: 201610711104.2, the application date is: August 23, 2016, and the title is "a vanadium nitride and ferrovanadium nitride alloy strengthening agent and its preparation method and application method". Application. technical field [0002] The invention belongs to the field of special alloy materials, and more specifically relates to a preparation method of vanadium nitride and ferrovanadium nitride alloy reinforcing agent. Background technique [0003] Vanadium nitride and ferrovanadium nitride are alloys widely used in iron and steel metallurgy. When producing high-strength steel, vanadium nitride and ferrovanadium nitride alloy are usually used to alloy molten steel to improve the mechanical strength of steel ( performance). At present, vanadium nitride or ferrovanadium nitride is used to alloy molten steel alone. In microalloyed steels, microalloying of vanadium plays an important role. With the continuous deepening ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/00C22C29/16
CPCC21C7/0056C21C7/0006C22C29/16
Inventor 陈来祥
Owner 马鞍山市恒兴耐火炉料厂
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