Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of low-oxygen vanadium-nitrogen alloy

A technology of oxygen-vanadium-nitrogen alloy and nitrogen alloy, applied in the field of preparation of low-oxygen vanadium-nitrogen alloy, which can solve the problems of incomplete reduction of vanadium oxide, affecting the use effect of steel, and high residual oxygen content in products.

Active Publication Date: 2019-01-29
HUNAN ZHONGXIN NEW MATERIALS TECH
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vanadium-nitrogen alloy is a new type of steel additive. At present, the production method of vanadium-nitrogen alloy is to compress the oxide of vanadium and carbonaceous reducing agent into a solid state, and then reduce it in a high-temperature, positive-pressure nitrogen atmosphere in a sintering furnace. , Nitriding to produce vanadium-nitrogen alloy; during the reaction process, the carbonaceous reducing agent reduces vanadium oxide to vanadium carbide, and then further nitrides to vanadium-nitrogen alloy. , leading to incomplete reduction of vanadium oxide, high residual oxygen content in the product, and affecting its use in steel

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The production method of the low-oxygen vanadium-nitrogen alloy of the present embodiment may further comprise the steps:

[0025] Step 1: Add powdery vanadium compound and carbonaceous powder into a vacuum induction heating furnace, carry out carbonization reaction at a vacuum of 100Pa and a temperature of 1100°C-1400°C, keep the temperature for 3-5 hours, then cool to room temperature, and leave The vanadium carbide after charging is packed with the first sealed barrel, and nitrogen protection is passed into the sealed barrel.

[0026] Step 2: Import the vanadium carbide in the sealed barrel into the atmosphere-protected tilting wet mill, and add forming agent and wet grinding medium into the tilting wet mill for wet ball milling. The tilting wet mill Internal nitrogen protection, after ball milling in a tilting wet mill for 4-6 hours, mix evenly to form a vanadium carbide slurry, and pour it into the second sealed barrel.

[0027] Step 3: Place the second sealed bar...

Embodiment 2

[0037] This embodiment includes the following steps:

[0038] Step 1: Add vanadium pentoxide and graphite powder according to the ratio of 100 parts by weight: 27 parts into a vacuum induction heating furnace, carry out carbonization reaction at a vacuum degree of 100 Pa, and a temperature of 1100 ° C, and keep warm for 5 hour, then cooled to room temperature, the vanadium carbide after the discharge is packed with the first sealed barrel, and nitrogen protection is passed into the sealed barrel.

[0039] Step 2: Import the vanadium carbide in the sealed barrel into an atmosphere-protected tilting wet mill, and add molding agent paraffin and wet grinding medium anhydrous ethanol into the tilting wet mill for wet ball milling. Nitrogen protection in the type wet mill, after ball milling by the tilting type wet mill for 4 hours, mix evenly to form a vanadium carbide slurry, and pour it into the second sealed barrel.

[0040] Step 3: Place the second sealed barrel containing the...

Embodiment 3

[0044] Step 1: Get ammonium metavanadate and charcoal powder according to the proportioning ratio of parts by weight of 100 parts: 29 parts, and mix 0.8 part of reduced iron powder, the average particle size of reduced iron powder is 30 microns, join above raw material in In the vacuum induction heating furnace, the carbonization reaction is carried out at a vacuum degree of 100 Pa and a temperature of 1400 ° C. The temperature is kept for 3 hours, and then cooled to room temperature. The discharged vanadium carbide is packed in the first sealed barrel, and the sealed barrel is passed into Nitrogen protection.

[0045] Step 2: Introduce the vanadium carbide in the sealed barrel into an atmosphere-protected tilting wet mill, and add molding agent polyethylene glycol (PEG) and wet grinding medium acetone into the tilting wet mill for wet grinding Ball milling, nitrogen protection in the tilting wet mill, after ball milling in the tilting wet mill for 6 hours, mix evenly to form ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Provided is a preparation method of a low-oxygen vanadium-nitrogen alloy. According to the method, powder-like vanadium compound and carbonaceous powder are added into a vacuum induction heating furnace according to a certain proportion to be subjected to a carbonization reaction; then a forming agent and wet milling media are mixed and added into a wet mill to be subjected to wet milling treatment, and then spraying drying is performed so that vanadium carbide particles can be manufactured; then a forming agent desorption process, a pre-sintering process and a nitriding process are sequentially performed in a vacuum dewaxing and sintering integrated furnace; and finally the low-oxygen vanadium-nitrogen alloy is made. By adopting the preparation method of the low-oxygen vanadium-nitrogen alloy, temperatures of the carbonization reaction and a nitridation reaction can be effectively lowered, and the oxygen content of the finished vanadium-nitrogen alloy is substantially lowered.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a method for preparing a low-oxygen vanadium-nitrogen alloy. Background technique [0002] Vanadium-nitrogen alloy is a new type of alloy additive that can replace ferro-vanadium for the production of micro-alloyed steel. Adding vanadium nitride to steel can improve the comprehensive mechanical properties of steel such as strength, toughness, ductility and thermal fatigue resistance. It also makes the steel have good weldability, and at the same strength, adding vanadium nitride can save 30-40% of the vanadium addition, thereby reducing the cost. In recent years, due to the obvious technical and economic advantages of vanadium-nitrogen microalloying technology, vanadium-nitrogen microalloys have been used in high-strength steel bars, non-quenched and tempered steels, high-strength strips, CSP products, high-strength thick plates and thick-walled H-beams, It has been widely used in...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C22C1/10C22C29/16C22C35/00
CPCC22C1/10C22C29/16C22C35/00
Inventor 张春雨
Owner HUNAN ZHONGXIN NEW MATERIALS TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com