Micron-nano WC-Co hard alloy, preparation process and application thereof

A cemented carbide, micro-nano technology, applied in the field of its preparation, micro-nano WC-Co cemented carbide, can solve the problems of complex control of the second phase interface and difficult quality control, and achieve the effect of good strengthening and toughening effect.

Inactive Publication Date: 2012-10-31
王永富
View PDF6 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the rise of nanotechnology, the development of cemented carbide has also experienced the introduction of various nano-modification technologies, especially the second-phase hard nanoparticles such as TiN,

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
  • Micron-nano WC-Co hard alloy, preparation process and application thereof
  • Micron-nano WC-Co hard alloy, preparation process and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1 The preparation method of the micronano WC-Co cemented carbide is:

[0048] Prepare raw materials according to the following ratio:

[0049] Micro-nano WC composite powder 89%

[0050] Metal Co powder 10%

[0051]VC powder 1%

[0052] Toner <1%

[0053] And the raw materials are uniformly mixed in alcohol, wherein the micro-nano WC composite powder is prepared by mixing WC powder with a particle size of 5 microns and 100 nanometers in a ratio of 1:1;

[0054] Afterwards, use cemented carbide balls as grinding balls, the ball-to-material ratio is 1:5, the ball milling speed is 200 rpm, and the ball milling time is 48 hours;

[0055] Then vacuum-dried, mixed with 3wt% polyvinyl alcohol binder relative to the weight percentage of the cemented carbide raw material, granulated, molded at 350 MPa, heated at 0.5 degrees per minute to 350 degrees for 3 hours, degreased for 3 hours, and vacuum sintered at 1350 degrees for densification. Obtain micro-nano WC-Co c...

Embodiment 2

[0057] Example 2: The difference between this example and Example 1 is that the mixing ratio of 5 microns and 100 nanometers of WC powder in the micro-nano WC composite powder is 1:2, and its mechanical properties are shown in Table 1.

Embodiment 3

[0058] Example 3: The difference between this example and Example 1 is that the mixing ratio of 5 microns and 100 nanometers of WC powder in the micro-nano WC composite powder is 1:3, and its mechanical properties are shown in Table 1.

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

The invention discloses a micron-nano WC-Co hard alloy, a preparation process and application thereof. According to the hard alloy, micron scale WC particles and nano scale WC particles serve as hard phase raw materials and account for 80-95 wt.%, micron scale WC particles and nano scale WC particles can be in any proportion, 0.01-5 wt.% of VC serves as a grain growth inhibitor, and 3-20 wt.% of Co serves as a binder phase. The preparation process comprises procedures such as ball milling, drying, pelleting, press forming and vacuum sintering which are conducted sequentially. According to the hard alloy, the preparation process and the application, a traditional powder metallurgy process is adopted, the harmonious enhancement function of micron-nano particles of different scales is used, the hard alloy has performance characteristics of both micron coarse-grain hard alloys and ultra-fine grain and nanocrystalline hard alloys, both the strength and the toughness are considered, and good comprehensive performance such as strength, hardness, shock resistance and wearing resistance is represented. Combinations of micron-nano particles can be designed according to requirements of different application areas, regulation and control of performance are achieved, and good modification and improvement of traditional hard alloy products are achieved.

Description

technical field [0001] The invention relates to a hard alloy and a preparation method thereof, in particular to a micronano WC-Co hard alloy, a preparation method and an application thereof. Background technique [0002] Cemented carbide is an alloy material made of hard compounds of refractory metals and bonding metals through powder metallurgy. It mainly uses carbides (WC, TiC) as the main component, and cobalt (Co) or nickel (Ni ), molybdenum (Mo) is the binder, and the WC-Co series is the most widely used. 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 is widely used as industrial cutting tools, mining drills, wear-resistant parts, precision parts, etc. The mechanical properties of cemented carbi...

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): C22C29/08C22C1/05
Inventor 王永富陈名海
Owner 王永富
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