A kind of composite strengthened cemented carbide and its preparation method
A cemented carbide and alloy technology, applied in the field of cemented carbide, can solve the problems of WC-Co alloy red hardness not being fundamentally improved, unable to meet demand and other problems
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0024] The raw material for preparing the composite strengthened hard alloy in the present invention includes alloy raw material powder, and the alloy raw material powder includes 30-80wt% tungsten carbide powder, preferably 35-78wt%, more preferably 40-75wt%. In the present invention, the particle size of the tungsten carbide powder is preferably 0.5-20 μm, more preferably 0.8-10 μm, more preferably 1-5 μm. In the present invention, the tungsten carbide (WC) powder is the base material and also one of the hard phases of the composite strengthened hard alloy.
[0025] The alloy raw material powder in the present invention includes 5-20 wt% titanium diboride powder, preferably 8-17 wt%, more preferably 10-15 wt%. In the present invention, the titanium diboride (TiB 2 The particle size of the ) powder is preferably 0.5 to 20 μm, more preferably 1 to 15 μm, even more preferably 2 to 10 μm. In the present invention, the titanium diboride powder can react with tungsten carbide po...
Embodiment 1
[0051] The chemical composition and dosage of the raw materials for composite strengthening cemented carbide are shown in Table 1, wherein the rare earth oxide is a mixture of samarium oxide and lanthanum oxide with a mass ratio of 1:1; the toughening agent is carbon nanotubes; the forming agent is 3% liquid paraffin.
[0052] Wet-mill the above raw materials with absolute ethanol as the ball milling medium for 20 hours, take out the wet abrasive and dry it for 8 hours at a vacuum degree of 0.1 Pa and a temperature of 90°C, and sieve to obtain alloy powder with a particle size of 1-5 μm ; The alloy powder is isostatically pressed into a blank; the blank is vacuum sintered at 1320°C for 15 hours, heated to 450°C at a heating rate of 2°C / min, kept for 2 hours, and heated at 4°C / min Heating to 930°C at a heating rate of 4°C / min and holding for 2 hours, then heating to the final sintering temperature at a heating rate of 4°C / min and holding for 0.5 hours. After sintering, the pro...
Embodiment 2
[0054] The chemical composition and dosage of the raw materials for composite strengthening cemented carbide are shown in Table 1, wherein the rare earth oxide is a mixture of samarium oxide and yttrium oxide with a mass ratio of 1:1; the toughening agent is silicon nitride whisker and silicon carbide whisker mass 1:1 mixture; forming agent is 4% liquid paraffin.
[0055] Wet mill the above raw materials with acetone as the ball milling medium for 25 hours, take out the wet abrasive and dry it for 10 hours at a vacuum degree of 5Pa and a temperature of 80°C, and sieve to obtain an alloy powder with a particle size of 1-5μm; press molding , to get the drawing die blank, the drawing die blank was vacuum sintered at 1350°C for 12 hours, heated to 460°C at a heating rate of 1°C / min, kept for 3 hours, and heated to 940°C at a heating rate of 2°C / min , keep it warm for 1 hour, then heat it to the final sintering temperature at a heating rate of 3°C / min, and keep it warm for 1 hour. ...
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle diameter | aaaaa | aaaaa |
| particle diameter | aaaaa | aaaaa |
| flexural strength | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More