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

Rare-earth-added ultra-fine grain high-toughness WC-10Co hard alloy material and preparation method

A cemented carbide, ultra-fine grain technology, applied in the field of powder metallurgy, to achieve the effect of simple and convenient process

Active Publication Date: 2020-05-01
UNIV OF SCI & TECH BEIJING
View PDF9 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the current research on rare earth inhibitors focuses on several rare earths such as Ge, Y, and La, and there is no public report on the preparation of ultrafine-grained high-toughness cemented carbide by adding praseodymium oxide and neodymium oxide.

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
  • Rare-earth-added ultra-fine grain high-toughness WC-10Co hard alloy material and preparation method
  • Rare-earth-added ultra-fine grain high-toughness WC-10Co hard alloy material and preparation method
  • Rare-earth-added ultra-fine grain high-toughness WC-10Co hard alloy material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] According to mass fraction WC89%, Co10%, VC0.5%, Cr 3 C 2 0.3% and Pr 6 o 110.2% for batching, with absolute ethanol as the ball milling medium, its addition amount is 240ml / kg, paraffin wax addition amount is 80g / kg, zirconia pellets are added as 500g each of Φ10 and Φ6, put into the polyester ball mill jar, and The ball milling process was carried out for 8 hours at a rotational speed of 150r / min. Then the ball-milled mixture was rinsed through an 80-mesh sieve with absolute ethanol; the sieved mixed powder was placed in a ventilated drying oven for 12 hours to dry. Then put the dried mixed powder directly into the molding die, and use 70MPa pressure to keep the pressure for 2 minutes to prepare the green body. In the vacuum sintering furnace, after the vacuuming is completed, the temperature is raised to 500°C at a rate of 2°C / min and kept for 60 minutes, then the temperature is raised to 1380°C at a rate of 4°C / min, kept for 90 minutes, and finally cooled with t...

Embodiment 2

[0037] According to mass fraction WC88.8%, Co10%, VC0.5%, Cr 3 C 2 0.3% and Pr 6 o 11 0.4% for batching, with absolute ethanol as the ball milling medium, its addition amount is 240ml / kg, paraffin wax addition amount is 80g / kg, zirconia pellets are added as 500g each of Φ10 and Φ6, put into the polyester ball mill jar, and The ball milling process was carried out for 8 hours at a rotational speed of 150r / min. Then the ball-milled mixture was rinsed through an 80-mesh sieve with absolute ethanol; the sieved mixed powder was placed in a ventilated drying oven for 12 hours to dry. Then put the dried mixed powder directly into the molding die, and use 70MPa pressure to keep the pressure for 2 minutes to prepare the green body. In the vacuum sintering furnace, after the vacuuming is completed, the temperature is raised to 500°C at a rate of 2°C / min and kept for 60 minutes, then the temperature is raised to 1380°C at a rate of 4°C / min, kept for 90 minutes, and finally cooled wit...

Embodiment 3

[0039] According to mass fraction WC89.1%, Co10%, VC0.5%, Cr 3 C 2 0.3% and Nd 2 o 3 0.1% for batching, with absolute ethanol as the ball milling medium, its addition amount is 240ml / kg, paraffin wax addition amount is 80g / kg, zirconia pellets are added as 500g each of Φ10 and Φ6, put into the polyester ball mill jar, and The ball milling process was carried out for 8 hours at a rotational speed of 150r / min. Then the ball-milled mixture was rinsed through an 80-mesh sieve with absolute ethanol; the sieved mixed powder was placed in a ventilated drying oven for 12 hours to dry. Then put the dried mixed powder directly into the molding die, and use 70MPa pressure to keep the pressure for 2 minutes to prepare the green body. In the vacuum sintering furnace, after the vacuuming is completed, the temperature is raised to 500°C at a rate of 2°C / min and kept for 60 minutes, then the temperature is raised to 1380°C at a rate of 4°C / min, kept for 90 minutes, and finally cooled with...

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
Fracture toughnessaaaaaaaaaa
Sizeaaaaaaaaaa
Fracture toughnessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a rare-earth-added ultra-fine grain high-toughness WC-10Co hard alloy material and a preparation method, and belongs to the field of powder metallurgy. The hard alloy comprises the components: 88.7 percent to 89.1 percent of tungsten carbide, 10 percent of cobalt, 0.5 percent of vanadium carbide, 0.3 percent of chromium carbide, and 0.1 percent to 0.5 percent of praseodymium oxide (or 0.1 percent to 0.5 percent of neodymium oxide). Rare earth oxide can be used for refining WC grains through influencing the content of W elements in binding-phase Co and influencing the liquid phase temperature in sintering, so that the hardness of the hard alloy is improved; and in addition, the rare earth oxide can be used for enhancing the toughness through acting on a Co phase. The alloy continuity can be worsened along with the increase of the content of the rare earth oxide, so that the adding content of the rare earth oxide is limited within a certain range. The rare-earth-added ultra-fine grain high-toughness WC-10Co hard alloy is prepared through ball milling, briquetting and vacuum sintering. The hard alloy provided by the invention is fine in grain size which reaches to 190nm minimally, higher in hardness which reaches up to 2100HV, and favorable in toughness which reaches up to 28.17MPa.m1 / 2 at the same time. A hard alloy product with high hardness and high toughness at the same time is not publicly reported.

Description

technical field [0001] The invention relates to a rare earth-added ultra-fine-grain high-toughness WC-10Co hard alloy material and a preparation method thereof, belonging to the field of powder metallurgy. Background technique [0002] Cemented carbide has excellent properties such as high hardness, high strength, wear resistance and corrosion resistance. Cemented carbide, known as "industrial teeth", is widely used in various fields of industrial production. It is often used in cutting, drilling, mining, forming and other tool manufacturing. In the future, it will be used in aerospace, automobile industry, high-end equipment manufacturing industry, etc. The field is in great demand. With the decrease of WC particle size, its hardness and wear resistance are greatly improved, and its toughness is also greatly improved. Currently common inhibitors include VC, Mo 2 C, Cr 3 C 2 , NbC, TaC, etc. [0003] There are many cemented carbide patents that have been consulted, mai...

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): C22C29/08B22F3/10B22F9/04C22C1/05C22C1/10
CPCB22F3/1007B22F9/04B22F2009/043C22C1/051C22C29/067C22C29/08
Inventor 于浩吴伟嘉黎淑英
Owner UNIV OF SCI & TECH BEIJING
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