A kind of non-magnetic hard alloy and its preparation method and application
A cemented carbide and hard phase technology, applied in the field of non-magnetic cemented carbide and its preparation, can solve the problems of poor toughness, low strength and hardness of non-magnetic cemented carbide, etc., to improve mechanical properties, increase hardness and Strength, the effect of improving toughness
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0099] A second aspect of the present invention provides a method for preparing cemented carbide described in the first aspect of the present invention, comprising the following steps:
[0100] 1) WC powder, Ni powder, Cu powder and selected from Cr 3 C 2 powder, VC powder, Mo 2 One or more of the C powder and the TiC powder are mixed and wet-milled to obtain a wet-milled slurry;
[0101] 2) drying the wet-milled slurry to obtain an alloy powder mixture;
[0102] 3) Molding the alloy powder mixture into a compact, and then performing pressure sintering to obtain the hard alloy.
[0103] In some embodiments of the present invention, in step 1), a molding agent is also added during wet grinding, and the amount of the molding agent added is 1-3% of the material after mixing the components; and / or, the molding agent as paraffin and / or PEG.
[0104] In some preferred embodiments of the present invention, in step 1), a molding agent is also added during wet grinding, and the am...
Embodiment 1
[0114] By mass percentage: WC: 89.9%, Ni: 7.2%, Cu: 1.8%, Cr 3 C 2 : 0.6%, Mo 2 C: 0.5%, ingredients 1kg, ball milling medium is alcohol, the amount of alcohol added is 300ml, the weight ratio of ball to material is 3:1, molding agent PEG: 20g, wet mill in ball mill, filter after ball mill for 51h, and spray dry to get alloy powder mixture , and then press the alloy powder mixture, the molding pressure is 140MPa, and finally sintering, the sintering temperature: 1410°C, the sintering furnace pressure is 6MPa, the holding time is 2h, and its metallographic structure is as follows figure 1 and figure 2 As shown, the performance test results are shown in the table below, where K IC is the fracture toughness, which can be measured by the indentation method:
[0115]
[0116]
Embodiment 2
[0118] By mass percentage: WC: 90.4%, Ni: 7.2%, Cu: 1.8%, Cr 3 C 2 : 0.6%, ingredients 1kg, the ball milling medium is alcohol, the amount of alcohol added is 300ml, the weight ratio of the ball to material is 3:1, the molding agent PEG: 20g, wet mill in the ball mill, filter after ball milling for 45h, and spray dry to get the alloy powder mixture, Then the alloy powder mixture is pressed, the molding pressure is 140MPa, and finally sintered, the sintering temperature is 1410°C, the sintering furnace pressure is 6MPa, and the holding time is 2h. The performance test results are shown in the following table:
[0119]
PUM
| Property | Measurement | Unit |
|---|---|---|
| Curie point | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More