Overview of Tungsten Carbide Powder WC12Co/WC10Co4Cr Powder for HVOF
Tungsten is a metallic element with the element symbol W and atomic number 74. It is located in the VIB group of the sixth period of the periodic table of elements. In nature, tungsten mainly exists in the form of hexavalent cations. Its ionic radius is small, it has strong polarization ability, and it is easy to form complex anions.
When preparing pure tungsten or tungsten alloy, the main methods include powder metallurgy, smelting (including electron beam melting, vacuum melting, plasma beam melting) and chemical vapor deposition.
Feature of Tungsten Carbide Powder WC12Co/WC10Co4Cr Powder for HVOF
The thermal expansion coefficient of tungsten is very low, only 4.5×10^-6 m/mK, so it has good thermal stability. These properties make tungsten widely used in manufacturing high-temperature components and reliable heat detectors.
(Tungsten Carbide Powder WC12Co/WC10Co4Cr Powder for HVOF)
Parameters of Tungsten Carbide Powder WC12Co/WC10Co4Cr Powder for HVOF
Tungsten carbide powders, specifically WC12Co (12% Cobalt) and WC10Co4Cr (10% Cobalt and 4% Chromium), are commonly used in high-velocity oxygen fuel (HVOF) spraying applications due to their excellent wear resistance, thermal stability, and mechanical properties.
Here are some key parameters for HVOF processing with these tungsten carbide powders:
1. Particle Size Distribution: WC12Co and WC10Co4Cr powders typically have a narrow size distribution, usually ranging from 30 to 75 microns. This ensures good flowability and uniform coating during the HVOF process.
2. Flowability: Both powders should exhibit good flow characteristics to achieve proper mixing and atomization during the spray process. This can be achieved by maintaining proper storage conditions and using appropriate agglomeration inhibitors.
3. Ignition Temperature: The powders require a specific ignition temperature, usually around 2000-2200°C, to initiate combustion in the HVOF torch. The torch’s oxygen and fuel mixture must be optimized for efficient particle heating and ignition.
4. Spray Parameters: For WC12Co, the spray parameters might include an oxygen-to-fuel ratio of around 1.5-2.0, a powder feed rate of 0.5-3.0 kg/h, and a standoff distance of 150-250 mm. For WC10Co4Cr, these values could be similar but may need adjustments based on the specific application requirements.
5. Deposition Rate: The deposition rate depends on the equipment and application, but it’s typically around 0.1-1.0 mm/h for both powders. Faster rates can lead to higher productivity but may affect coating quality.
6. Thermal Conductivity: Tungsten carbide has high thermal conductivity, which is essential for minimizing heat buildup during spraying. However, the addition of cobalt and chromium may slightly decrease this property, so proper cooling systems should be employed.
7. Coating Properties: The final coating will have high hardness, wear resistance, and low coefficient of friction, making it suitable for demanding applications such as wear-resistant coatings, cutting tools, or thermal protection.
Remember that the exact HVOF parameters may vary depending on the manufacturer, equipment, and specific application requirements. Always consult the material data sheet and follow the manufacturer’s recommendations for optimal performance.
(Tungsten Carbide Powder WC12Co/WC10Co4Cr Powder for HVOF)
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FAQ
Question: What are some common applications for Tungsten Carbide Powder WC12Co/WC10Co4Cr Powder for HVOF?
Answer: Tungsten Carbide Powder WC12Co/WC10Co4Cr Powder for HVOF are widely used in cutting tools, drilling tools, high-speed steel, carbide, electrode materials, lighting equipment, aerospace, nuclear industry and other fields.
Question: What is tungsten alloy?
Answer: Tungsten alloy is an alloy composed of tungsten as a base and other elements added. It has the characteristics of high density, high hardness, good corrosion resistance and thermal stability. It is often used to make radiation shielding materials, counterweights, etc.
Question: Why is tungsten filament used in light bulbs?
Answer: Tungsten wire has a high melting point and excellent electrical conductivity, and can maintain stable luminous performance at high temperatures, so it is often used to make filaments for incandescent light bulbs.
Question: What is the role of the tungsten electrode in TIG welding?
Answer: Tungsten electrode is used as an electrode in tungsten argon arc welding. It has high melting point, high thermal conductivity and high electron emission capability. It can stably generate arc and achieve high-quality welding.
Question: What is Tungsten Carbide Powder WC12Co/WC10Co4Cr Powder for HVOF? What are its uses?
Answer: Tungsten Carbide Powder WC12Co/WC10Co4Cr Powder for HVOF is a compound composed of tungsten and carbon and has extremely high hardness and wear resistance. It is commonly used in the manufacture of cutting tools, drill bits and wear-resistant parts.
Question: What are the applications of tungsten in aerospace?
Answer: Tungsten and its alloys are used in the aerospace field to manufacture rocket engine nozzles, missile structural components, etc. Because of their high temperature resistance and corrosion resistance, they can withstand extreme working environments.
Question: What is the mining and processing process for Tungsten Carbide Powder WC12Co/WC10Co4Cr Powder for HVOF?
Answer: Mining of Tungsten Carbide Powder WC12Co/WC10Co4Cr Powder for HVOF usually involves underground mining or open-pit mining. After the ore is crushed and ground, the tungsten is extracted through chemical or physical methods. The processing process includes steps such as smelting, powder preparation, molding and sintering.
Question: What impact does Tungsten Carbide Powder WC12Co/WC10Co4Cr Powder for HVOF have on the environment?
Answer: Waste water, waste gas and solid waste may be produced during the mining and processing of Tungsten Carbide Powder WC12Co/WC10Co4Cr Powder for HVOF, which will have a certain impact on the environment. Therefore, appropriate environmental protection measures need to be taken to reduce pollution.
Question: How to identify the authenticity of tungsten products?
Answer: The authenticity of tungsten products can be identified by observing the appearance of the product, measuring its physical properties (such as density, hardness), and conducting chemical composition analysis. It is recommended to choose formal channels and reputable brands when purchasing.
(Tungsten Carbide Powder WC12Co/WC10Co4Cr Powder for HVOF)
