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Production method of carbon vanadium nitride solid melt and hard alloy thereof

A vanadium-titanium carbonitride and vanadium-titanium carbonitride-based technology, which is applied in the field of cemented carbide, can solve the problems of complex nitrogen partial pressure and flow rate, increase production cost, and nitrogen content exceeding the standard, and achieve easy control and operation of nitrogen content. Easy-to-control, simple-to-operate effects

Inactive Publication Date: 2019-01-04
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual production, the control operation of nitrogen partial pressure and flow is complicated, and a little carelessness will lead to excessive nitrogen content in the product.
In addition, because industrial general nitrogen contains a small amount of oxygen and moisture, these oxygen or moisture will cause oxidation of the product, and high-purity nitrogen with high purity must be used, thereby increasing production costs

Method used

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  • Production method of carbon vanadium nitride solid melt and hard alloy thereof
  • Production method of carbon vanadium nitride solid melt and hard alloy thereof
  • Production method of carbon vanadium nitride solid melt and hard alloy thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Take 44.14 grams of Ti(C,N) (solid solution formed by 30.53% TiC and 69.14% TiN) powder, and 55.86 grams of (Ti,V)C (solid solution formed by 99.96% TiC and 0.03% VC), Mix with absolute ethanol at a liquid-solid ratio of 6:1, and perform ball milling at a ball-to-material ratio of 8:1. The ball mill slurry is poured out from the ball mill, and at the same time passed through a sieve with an aperture of 0.05 mm for clarification, and the oversize is returned to the second batch of ball mills. After pouring out the supernatant liquid, dry it at a vacuum of 0.3 Pa at a temperature of 70° C. for 7 hours, and volatilize the ethanol therein to obtain a mixture. Compress the mixture to a density of 3.2g / cm 3 of compacts. Place the compact in a vacuum furnace at a vacuum degree of 6×10 -2 Pa, alloying at a temperature of 1600°C for 3 hours, cooling down to room temperature, breaking the vacuum, opening the vacuum furnace, and taking out the alloyed compact. After crushing t...

Embodiment 2

[0080] Take 13.52 grams of Ti(C,N) (solid solution formed by 30.53% TiC and 69.14% TiN) powder, and 86.48 grams of (Ti,V)C (solid solution formed by 99.96% TiC and 0.03% VC), 14 grams of Co powder and 6 grams of Ni powder were mixed with absolute ethanol at a liquid-solid ratio of 4:1, and the ball-to-material ratio was 5:1 for ball milling, and the ball milling time was 72 hours. The ball mill slurry is poured out from the ball mill, and passed through a 0.04-diameter sieve for clarification, and the oversize is returned to the second batch of ball mills. After pouring out the supernatant liquid, dry it at a vacuum of 0.2 Pa at a temperature of 70° C. for 8 hours, and volatilize the ethanol therein to obtain a mixture. According to the ratio of 120 grams of SD-2X rubber per kilogram, mix the mixture with the gasoline solution of SD-2X rubber evenly, and the concentration of the gasoline rubber solution is 0.024g / cm 3 . The mixture mixed with glue was dried in a vacuum atmosph...

Embodiment 3

[0082] Take V(C,N) (a solid solution composed of 34.03% VN and 65.97% VC) 82.97 grams, take (Ti, V)C (a solid solution formed by 79.22% TiC and 20.78% VC) 17.03 grams, Mix with absolute ethanol at a liquid-to-solid ratio of 8:1, ball milling with a ball-to-material ratio of 10:1, and the ball milling time is 24 hours. The ball mill slurry is poured out from the ball mill, and passed through a 0.04-aperture sieve for clarification at the same time, and the sieved material is returned to the second batch of ball mills. After pouring out the supernatant liquid, dry it at 80° C. for 6 hours at a vacuum degree of 0.5 Pa, and volatilize the ethanol therein to obtain a mixture. Compress the mixture to a density of 3.8g / cm 3 of compacts. The compact was placed in a tube furnace and kept warm under an argon atmosphere at a temperature of 1900°C for 6 hours for alloying. Open the door of the tube furnace and take out the alloyed compact. After crushing the compact, pass through a si...

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Abstract

The invention relates to a production method of a carbon vanadium nitride solid melt and a hard alloy thereof, belongs to the technical field of hard alloys and aims to solve the technical problem ofproviding a production method which is low in cost and easy in process control for the carbon vanadium nitride solid melt and the hard alloy thereof. The production method of the carbon vanadium nitride solid melt comprises the following steps: a, carrying out ball milling, namely putting solid powder into absolute ethyl alcohol in a liquid-solid ratio of (4-8):1, and carrying out ball milling mixing with a ball material ratio of (5-10):1, wherein the solid powder is carbon vanadium nitride powder and carbon nitriding metallic powder, and the carbon nitriding metallic powder is titanium carbonitride powder or carbon vanadium nitride powder; b, carrying out filtration and drying; c, carrying out pressing molding; d, carrying out reductive carbonization, thereby obtaining the carbon vanadiumnitride solid melt. Ti(C, N) or V(C, N) made by using a common carbon thermal reduction method provided by the invention is a nitrogen source produced carbon vanadium nitride solid melt and a corresponding hard alloy, the content of N in the melt is easy to control, and the production process is simple and feasible, convenient to control and low in cost.

Description

technical field [0001] The invention relates to a production method of vanadium-titanium carbonitride solid solution and hard alloy, belonging to the technical field of hard alloy. Background technique [0002] Cemented carbide is an alloy material made of hard compounds of refractory metals and bonding metals through powder metallurgy. Cemented carbide has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance and corrosion resistance, especially its high hardness and wear resistance, which basically remain unchanged even at a temperature of 500°C , it still has a high hardness at 1000°C, and can be widely used as tool materials, such as turning tools, milling cutters, planers, drills, boring tools, etc., for cutting cast iron, non-ferrous metals, plastics, chemical fibers, graphite, glass, Stone and ordinary steel can also be used to cut heat-resistant steel, stainless steel, high manganese steel, tool steel a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/04C22C1/05C22C1/10C01B21/082
CPCC01B21/0828C22C1/051C22C1/058C22C29/04
Inventor 陈敏方民宪张雪峰任杰李思艾
Owner PANZHIHUA UNIV
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