Ni3Al bonded ultra-fine grained tungsten carbide-based hard alloy and preparation method thereof

A tungsten carbide-based, hard alloy technology, applied in Ni3Al bonded ultra-fine grained tungsten carbide-based cemented carbide and its preparation, ultra-fine grained tungsten carbide-based cemented carbide and its preparation field, can solve the problem of ultra-fine grained hard alloy. The alloy is expensive and the production cost is high, and the production cost is low, the density is improved, and the fine distribution is uniform.

Inactive Publication Date: 2012-07-11
CENT SOUTH UNIV
View PDF3 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since cobalt is a strategic resource, the ultrafine-grained cemented carbide prepared by this method also has the disadvantages of high price and high production cost.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ni3Al bonded ultra-fine grained tungsten carbide-based hard alloy and preparation method thereof
  • Ni3Al bonded ultra-fine grained tungsten carbide-based hard alloy and preparation method thereof
  • Ni3Al bonded ultra-fine grained tungsten carbide-based hard alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The preparation composition is WC-5Ni 3 Al-0.08LaB 6 -0.05Cr 3 C 2 -0.05VC (mass fraction, the same below) Ni 3 Al-bonded ultrafine-grained tungsten carbide-based cemented carbide. The raw materials used are 0.5um tungsten carbide powder, 1um nickel powder, 2um aluminum powder, 2.5um vanadium carbide powder, 2.5um chromium carbide powder, and 5um lanthanum hexaboride powder. Weigh the raw material powder according to the alloy ratio, use acetone solution as the ball milling medium, add paraffin wax molding agent, and use argon protection to ball mill at a speed of 600 rpm for 48 hours on a ball mill with a ball-to-material ratio of 5:1. Under the pressure molding of 400MPa. The compact was degreased in a hydrogen furnace at 400°C for 5 hours. Then sinter in a low-pressure sintering furnace, the sintering pressure is 1MPa, the sintering temperature is 1500°C, and the sintering time is 2h, the obtained Ni 3 The average grain size of WC in Al-bonded ultra-fine-grain...

Embodiment 2

[0038] The preparation composition is WC-20Ni 3 Al-0.1CeB 6 -0.25Cr 3 C 2 -0.5VC (mass fraction, the same below) Ni 3 Al-bonded ultrafine-grained tungsten carbide-based cemented carbide. The raw materials used are 0.3um tungsten carbide powder, 2um nickel powder, 1um aluminum powder, 5um vanadium carbide powder, 2.5um chromium carbide powder, and 3.5um cerium hexaboride powder. Weigh the raw material powder according to the alloy ratio, use acetone solution as the ball milling medium, add paraffin wax molding agent, and pass through the protection of argon, ball mill on the ball mill at a speed of 300 rpm for 72 hours, the ball to material ratio is 3:1; then at room temperature Under the pressure molding of 200MPa. The compact was degreased in a hydrogen furnace at 350°C for 15 hours. Then sinter in a low-pressure sintering furnace, the sintering pressure is 5MPa, the sintering temperature is 1550°C, and the sintering time is 5h, the obtained Ni 3 The average grain size...

Embodiment 3

[0040] The preparation composition is WC-40Ni 3 Al-0.01NdB 6 -0.5Cr 3 C 2 -0.25VC (mass fraction, the same below) Ni 3 Al-bonded ultrafine-grained tungsten carbide-based cemented carbide. The raw materials used are 0.1um tungsten carbide powder, 1um nickel powder, 1um aluminum powder, 2.5um vanadium carbide powder, 5um chromium carbide powder, and 2.5um niobium hexaboride powder. Weigh the raw material powder according to the alloy ratio, use acetone solution as the ball milling medium, add paraffin wax molding agent, and under the protection of argon, ball mill on the ball mill at a speed of 450 rpm for 24 hours, the ball to material ratio is 10:1; then at room temperature Under the pressure molding of 300MPa. The compact was degreased in a hydrogen furnace at 450°C for 5 hours. Then sinter in a low-pressure sintering furnace, the sintering pressure is 3MPa, the sintering temperature is 1600°C, and the sintering time is 1h, the obtained Ni 3 The average grain size of W...

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

PropertyMeasurementUnit
sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention provides a Ni3Al bonded ultra-fine grained tungsten carbide-based hard alloy and a preparation method thereof, and belongs to the field of high-performance structural materials. The hard alloy comprises the following components in percentage by mass: 0.01 to 0.1 percent of rare earth hexaboride (ReB6), 0.05 to 0.5 percent of chromium carbide (Cr2C3), 0.05 to 0.5 percent of vanadium carbide (VC), 5 to 40 percent of nickel aluminum (Ni3Al) and the balance of tungsten carbide powder. The method comprises the following steps of: weighing the tungsten carbide powder, nickel powder, aluminum powder, ReB6 powder, Cr2C3 powder and VC powder with certain granularity in a weight percent ratio, uniformly mixing the powder by a mixing method, and pressing by a compression molding process to obtain a blank with a certain shape; and degreasing the blank, putting into a low-pressure sintering furnace, sintering, and cooling with the furnace to obtain the Ni3Al bonded ultra-fine grained tungsten carbide-based hard alloy. The alloy prepared by the method is fine grained and has a uniform structure, high density and strength, corrosion resistance and high-temperature resistance, the process is simple, preparation cost is low, and industrial production can be implemented.

Description

technical field [0001] The invention discloses an ultra-fine-grained tungsten carbide-based hard alloy bonded with intermetallic aluminides and a preparation method thereof, specifically a Ni 3 Al-bonded ultrafine-grained tungsten carbide-based hard alloy and a preparation method thereof. It belongs to the field of high-performance structural materials. Background technique [0002] Ultrafine-grained tungsten carbide-based cemented carbide is widely used as cutting tools, mining tools and wear-resistant materials because of its high strength, high hardness and high wear resistance. The existing ultra-fine-grained tungsten carbide-based cemented carbide is mainly composed of tungsten carbide and cobalt metal in the binder phase. Cobalt is a scarce resource of strategic resources, which is expensive, and its high-temperature oxidation resistance and corrosion resistance are poor, which limits cobalt. Further application of tungsten carbide-based cemented carbide as binder ph...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/05
Inventor 肖代红宋旼申婷婷李秀秀欧小琴贺跃辉
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap