A method for preparing a uniform porous tungsten product
A technology of porous tungsten products, which is applied in metal processing equipment, transportation and packaging, etc., can solve the problems of loose packing and low tap density, large sintering shrinkage of the formed body, easy deformation and cracking, etc., and achieves the improvement of loose packing and vibration Density, improving product dimensional accuracy, and avoiding uneven distribution of pores
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0032] 1. Raw material powder: the raw material powder is commercially available tungsten powder, the purity is greater than 99.9%, and the Fischer particle size is 3um;
[0033]2. Feed preparation: Mix and disperse the tungsten powder particles obtained by the first heat treatment with the organic binder evenly, and make granular feed. The volume fraction of powder particles in the feed is 54%;
[0034] 3. Injection molding: The feed material is formed into a tungsten body of the required shape and size on the injection molding machine. The injection parameters are: injection speed is 90%, injection pressure is 100Mpa, and injection temperature is 165°C;
[0035] 4. Degreasing: Remove the binder in the tungsten body by proper process. The degreasing process is: immerse in trichlorethylene for 12 hours. The thermal degreasing process system is to raise the temperature to 300°C at 1°C / min and keep it warm for 60min. , then raise the temperature to 420°C at 2°C / min, hold for 30 ...
Embodiment 2
[0038] 1. Raw material powder: the raw material powder is commercially available tungsten powder, the purity is greater than 99.9%, and the Fischer particle size is 3um;
[0039] 2. Jet mill disperses and removes fine powder: Clean the jet mill equipment, turn on the main control to preheat, fill in high-purity nitrogen with a purity higher than 99.9% as the working gas, reduce the oxygen content to 0.1%, open the grinding valve, and adjust the grinding The pressure is 0.70Mpa, add high-purity tungsten powder into the grinding chamber for grinding, so that the agglomerates are opened, start the sorting wheel, adjust the speed of the sorting wheel to 6000rpm, and collect the sorted ultrafine particle tungsten powder (<2um);
[0040] 3. Jet mill classification treatment: reduce the rotation speed of the sorting wheel to 6000rpm to 3000rpm four times, and collect tungsten powder in batches;
[0041] 4. Powder heat treatment: under the protection of high-purity hydrogen atmosphere...
Embodiment 3
[0047] 1. Raw material powder: The raw material powder is commercially available tungsten powder with a purity greater than 99.9% and a Fischer particle size of 5um;
[0048] 2. Feed preparation: Mix and disperse the tungsten powder particles obtained by the first heat treatment with the organic binder evenly, and make granular feed. The volume fraction of powder particles in the feed is 54%;
[0049] 3. Injection molding: The feed material is formed into a tungsten body of the required shape and size on the injection molding machine. The injection parameters are: injection speed is 90%, injection pressure is 100Mpa, and injection temperature is 165°C;
[0050] 4. Degreasing: Remove the binder in the tungsten body by proper process. The degreasing process is: immerse in trichlorethylene for 12 hours. The thermal degreasing process system is to raise the temperature to 300°C at 1°C / min and keep it warm for 60min. , then raise the temperature to 420°C at 2°C / min, hold for 30 min...
PUM
Property | Measurement | Unit |
---|---|---|
porosity | aaaaa | aaaaa |
porosity | aaaaa | aaaaa |
porosity | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
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