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

A method for rapidly preparing gradient cemented carbide by adding rare earth elements

A technology of cemented carbide and rare earth elements, applied in the field of cemented carbide material manufacturing, can solve the problem of adding few alloy members

Active Publication Date: 2017-04-19
株洲金韦硬质合金有限公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, little research has been done on the addition of alloy group members to gradient alloys

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
  • A method for rapidly preparing gradient cemented carbide by adding rare earth elements
  • A method for rapidly preparing gradient cemented carbide by adding rare earth elements
  • A method for rapidly preparing gradient cemented carbide by adding rare earth elements

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] step one

[0057] Configuration of carbon-poor cemented carbide powder containing rare earth elements: in the carbon-poor cemented carbide powder containing rare earth elements, it includes by mass percentage:

[0058] WC powder 87.5%; Co powder 6%; W powder 6%; rare earth oxide Y 2 o 3 , wherein Y accounts for 0.5% of the total mass of the carbon-poor cemented carbide powder containing rare earth elements; the total content of carbon in the carbon-poor cemented carbide powder containing rare earth elements is 5.22wt.%; the rare earth element Y is by Y 2 o 3 obtained after reduction; the particle size of the WC powder is 2 μm; the particle size of the Co powder is 2.0 μm; the particle size of the W powder is 1.5 μm; the Y 2 o 3 The particle size of the powder is 1.5μm; the preparation process is as follows: the prepared WC powder, Co powder, W powder, Y powder 2 o 3 Dry mill for 2 hours, mix well, in order to make Y 2 o 3 Reduction to Y, heating in a hydrogen a...

Embodiment 2

[0075] Other conditions are completely consistent with embodiment 1, just the rare earth element is changed into La, and its content is 0.7wt%, and Y 2 o 3 changed to La 2 o 3 , reducing La 2 o 3 The temperature is 1050°C, the time is 40 minutes, and the carburizing temperature is 1450°C; the specific test items and test results are shown in Table 3

[0076] table 3

[0077]

Embodiment 3

[0084] Other conditions are exactly the same as in Example 1, except that the rare earth element is replaced by Ce, and its content is 0.6wt%, and Y 2 o 3 replaced by CeO 2 , reducing CeO 2 The temperature is 1100°C, the heating time is 30 minutes, the forming pressure is 300MPa, and the carburizing temperature is 1460°C; the specific test items and test results are shown in Table 5.

[0085] table 5

[0086]

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
thicknessaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for quickly preparing gradient cemented carbide by adding rare-earth elements, and belongs to the field of manufacturing cemented carbide materials. The method disclosed by the invention comprises the following steps: pressing and forming carbon-poor cemented carbide powder containing rare earth, and performing vacuum sintering to obtain a carbon-poor presintering base body; performing carburizing treatment for 40-120 minutes at the temperature of 1,400-1,460 DEG C under the hydrogen atmosphere to obtain the gradient cemented carbide, wherein the thickness of a gradient layer of the gradient cemented carbide is 200-3000 [mu]m. The rare-earth elements are added in the process of preparing the gradient cemented carbide, so that alloying components are solidified and dissolved in a Co phase in the presintering process, and the effect of inhibiting crystal grains from growing can be achieved. But in the carburizing process, the influence of adding the rare earth on the dissolution and the separation of WC (wolfram carbide) in the Co phase is weakened, and more passages are provided for the diffusion of activated carbon, so that the thickness of the gradient layer of the alloy can be quickly increased.

Description

technical field [0001] The invention discloses a method for rapidly preparing gradient hard alloy by adding rare earth elements, and belongs to the field of hard alloy material manufacturing. Background technique [0002] Cemented carbide is a composite tool material prepared by powder metallurgy with refractory metal compounds (WC, TaC, TiC, NbC, etc.) as the matrix and transition metals (Co, Ni, Fe) as the binder phase. Due to its high strength, high hardness, high elastic modulus, wear resistance, corrosion resistance and other advantages, it plays an important role in metal cutting, wood processing, mining drilling and other aspects. Generally, carbides play an important role in the hardness and wear resistance of the alloy, while bonding has an important impact on the strength and toughness of the alloy. Generally speaking, increasing the WC grain size or increasing the Co content will increase the thickness of the binder phase of the alloy and improve the plasticity o...

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 Patents(China)
IPC IPC(8): C22C1/04C22C29/08
Inventor 刘咏李晓峰周建华付坤梁宵鹏吕信群韦伟杜萌
Owner 株洲金韦硬质合金有限公司
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