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

Diamond cutting tool based on rare earth modified iron-based binder and preparation method thereof

An iron-based binder and rare earth modification technology, which is applied to other manufacturing equipment/tools, engine components, turbines, etc., can solve the problems of poor wettability of diamonds, so as to improve the encasement strength, increase wear resistance, and reduce heat loss. damage effect

Active Publication Date: 2022-06-24
CHINA UNIV OF GEOSCIENCES (WUHAN)
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wettability of iron to diamond is poor, mainly relying on the difference in thermal expansion of the two during the sintering process to encase the diamond

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
  • Diamond cutting tool based on rare earth modified iron-based binder and preparation method thereof
  • Diamond cutting tool based on rare earth modified iron-based binder and preparation method thereof
  • Diamond cutting tool based on rare earth modified iron-based binder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Mixing 30-40 mesh synthetic diamonds with a metal bond in a volume ratio of 1:5 to obtain a mixed powder, the metal bond includes Fe70Cu30 pre-alloyed powder 94.5%, Ni50Cr50 pre-alloyed powder 5.0%, praseodymium 0.5% (mass Fraction);

[0026] (2) after the mixed powder is loaded into the graphite mold, hot-press sintering is performed, the sintering temperature is 960 ° C, the sintering pressure is 13 MPa, and the temperature is kept for 3 minutes to obtain a diamond cutting unit;

[0027] (3) The diamond cutting unit is fixed on the steel body of the saw blade by brazing to make a diamond saw blade.

[0028] The holding force coefficient of the diamond cutting unit matrix obtained in Example 1 to diamond was 0.538, and the impact strength of diamond was 0.889.

Embodiment 2

[0030] (1) Mixing 40-50 mesh synthetic diamond with a metal binder in a volume ratio of 1:4 to obtain a mixed powder, the metal binder includes Fe70Cu30 pre-alloyed powder 89.2%, Ni50Cr50 pre-alloyed powder 10.0%, Pr 0.8% (mass fraction );

[0031] (2) after the mixed powder is loaded into the graphite mold, hot-press sintering is performed, the sintering temperature is 1000 ° C, the sintering pressure is 15 MPa, and the temperature is kept for 5 minutes to obtain a diamond cutting unit;

[0032] (3) The diamond cutting unit is fixed on the steel body of the drill bit by welding to make a diamond drill bit.

[0033] The holding force coefficient of the cutter matrix obtained in Example 2 to diamond was 0.539, and the impact strength of diamond was 0.875.

[0034] like figure 1 and figure 2 , it can be seen from the energy spectrum of the surface of the cutting unit carcass that Pr can promote the formation of solid solution of Cu and Cr, and improve the flexural strength o...

Embodiment 3

[0036] (1) Mix the 50-60 mesh synthetic diamond with a metal binder in a volume ratio of 3:10 to obtain a mixed powder, the metal binder includes Fe70Cu30 pre-alloyed powder 84.0%, Ni50Cr50 pre-alloyed powder 15.0%, Pr 1.0% (mass fraction );

[0037] (2) after the mixed powder is loaded into the graphite mold, hot-press sintering is performed, the sintering temperature is 1100 ° C, the sintering pressure is 18 MPa, and the temperature is kept for 6 minutes to obtain a diamond cutting unit;

[0038] (3) The diamond cutting unit is directly hot-pressed and sintered on the steel body of the drill to make a diamond drill.

[0039] The holding force coefficient of the cutter matrix obtained in Example 3 to diamond was 0.577, and the impact strength of diamond was 0.867.

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
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a diamond cutting tool based on a rare earth modified iron-based binder, which is made of artificial diamond with a particle size of 30-200 mesh and a metal binder, and the metal binder is composed of the following raw materials in mass fraction: 60 %-95% Fe70Cu30 pre-alloyed powder, 5%-40% Ni50Cr50 pre-alloyed powder, 0.1-1.2% pure praseodymium powder; the invention also discloses a diamond cutting tool based on rare earth modified iron-based binder. The invention can reduce the thermal damage of the diamond in the sintering process, improve the strength of the carcass to the diamond, increase the wear resistance of the cutting tool, and prolong the working life of the diamond cutting tool.

Description

technical field [0001] The present invention relates to the technical field of cutting tools. More specifically, the present invention relates to a diamond cutting tool based on a rare earth modified iron-based binder and a preparation method thereof. Background technique [0002] Diamond tools are widely used in geological exploration, building repair construction, superhard material processing and other fields. The commonly used diamond tool matrix includes tungsten carbide and cobalt matrix. Tungsten carbide matrix has high mechanical properties. However, the high hardness of tungsten carbide leads to poor self-sharpening; while the cobalt matrix has excellent formability and sinterability, and has good wettability to diamond, the bonding strength of diamond and matrix is ​​high, and self-sharpening is good. , which was once considered to be the most excellent matrix in the field of diamond tools. However, cobalt is an important resource with high price, so it can only ...

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): B22F1/12B22F3/14B22F5/00B22F7/08C22C33/02C22C26/00C22C30/02C22C1/05C22C38/42
CPCB22F3/14B22F5/00B22F7/08C22C33/0207C22C33/0278C22C26/00C22C30/02C22C1/05C22C38/42C22C38/005B22F2005/001
Inventor 石恒超谭松成段隆臣方小红杨展周燕
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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