Tungsten Carbide Alloy Rotary File Blank

Tungsten carbide is used in many industries because it has superior hardness characteristics compared to tool steel and excellent toughness compared to technical ceramics. Considering these superior properties, tungsten carbide is most commonly associated with tools used in metal cutting applications, such as sawing, milling, and turning. Many people are surprised to find that tungsten carbide is also frequently used in fluid dispensing or flow applications, as it has excellent service life when exposed to corrosive wear. The wear resistance of tungsten carbide has been improved, which can extend the lifespan of components such as nozzles in industries such as water jet cutting, oil and natural gas, and electronics.

Tungsten carbide is a name used for a wide range of alloys, which are composed of actual tungsten carbide, metal adhesives, and other added carbides (i.e. TiC and TaC). The two most common metal adhesives are cobalt and nickel. Metal adhesives can affect hardness, toughness, and chemical compatibility. The content of metal adhesive may vary from 3 to 20% of the finished material, depending on the required performance.

There are generally two types of tungsten carbide. A chemical formula WC, which is a black hexagonal crystal with metallic luster and hardness similar to diamond. It is a good conductor of electricity and heat. Melting point 2870 ℃, boiling point 6000 ℃, relative density 15.63 (18 ℃). Tungsten carbide is insoluble in water, hydrochloric acid, and sulfuric acid, but is easily soluble in a mixed acid of nitric acid and hydrofluoric acid. Pure tungsten carbide is fragile, and adding a small amount of titanium, cobalt, and other metals can reduce brittleness. Tungsten carbide, used as a steel cutting tool, is often added with titanium carbide, tantalum carbide, or their mixture to improve its explosion resistance. The chemical properties of tungsten carbide are stable. In tungsten carbide, carbon atoms are embedded in the gaps of the tungsten metal lattice without damaging the original metal lattice, forming a interstitial solid solution, hence also known as interstitial (or insertion) compounds. Tungsten carbide can be produced by heating a mixture of tungsten and carbon at high temperatures, and the presence of hydrogen or hydrocarbons can accelerate the reaction. If tungsten containing oxygen-containing compounds are used for preparation, the product must ultimately undergo vacuum treatment at 1500 ℃ to remove carbon oxides. Tungsten carbide is suitable for mechanical processing at high temperatures and can be used to make cutting tools, structural materials for kilns, jet engines, gas turbines, nozzles, etc. Another chemical formula, W2C, has a molecular weight of 379.71. Black hexagonal crystal. The specific gravity is 17.15. Melting point 2860 ℃. The boiling point is about 6000 ℃. At 400 ℃, it strongly reacts with chlorine to form tungsten hexachloride and graphite. Made by heating tungsten powder and carbon for a short time to 1900 ℃.

Most metals can interact with carbon below their melting point temperature, therefore, carbides of insoluble metals can be prepared at temperatures ranging from 1200 to 2200 ° C. Industrially prepared tungsten carbide is produced by heating an appropriate mixture of tungsten powder and carbon black in a carbon tube furnace to a certain temperature. At high temperatures, carbon diffuses from the surface to the inside of tungsten particles. During the diffusion process, a portion of carbon black directly contacts the surface of tungsten particles to participate in diffusion, while another portion of carbon black forms on the surface of particles. Under the effect of concentration difference, carbon is continuously decomposed from the surface of tungsten particles, which is used for the gas phase carburization process. The impurities (including sulfur content) in metallurgical carbon black have a significant impact on the properties of tungsten carbide and other materials, making it the main indicator for measuring the quality of this product.

Chemical Composition: 

Using tungsten and carbon as raw materials, the average particle size is 3-5 μ M tungsten powder and equal amounts of carbon black are mixed dry with a ball mill, thoroughly mixed, pressurized and shaped, and then placed in a graphite disc. It is then heated to 1400~1700 ℃ in a graphite resistance furnace or induction furnace, preferably controlled at 1550~1650 ℃. In the hydrogen gas stream, W2C is initially generated and continues to react to generate WC at high temperatures. Alternatively, tungsten powder can be obtained by thermal decomposition of hexacarbonyl tungsten in a CO atmosphere at 650~1000 ℃, and then reacted with carbon monoxide at 1150 ℃ to obtain WC. Above this temperature, W2C can be generated.

Chemical reaction formula:2W+C===W₂C;W+C===WC;

The requirements for the particle size of tungsten carbide WC in hard alloys are based on the different uses of hard alloys, and different particle sizes of tungsten carbide are used; Hard alloy cutting tools, such as V-CUT blades for cutting feet, are used for precision machining of tungsten carbide with ultrafine sub fine particles; The coarse processed alloy adopts medium particle tungsten carbide; Gravity cutting and heavy cutting alloys use medium to coarse grained tungsten carbide as the raw material; Mining tools with high rock hardness and high impact load use coarse-grained tungsten carbide; Small rock impact and low impact load, using medium particle tungsten carbide as raw material for wear-resistant parts; When emphasizing its wear resistance, compression resistance, and surface smoothness, ultrafine and sub fine tungsten carbide particles are used as raw materials; The impact resistant tools mainly use medium to coarse grained tungsten carbide raw materials.

 

 

Hard alloy rotary files, used in conjunction with high-speed electric grinders or pneumatic tools, are mainly used for precision machining, polishing, chamfering, etc. Used in industries such as machinery, automobiles, shipbuilding, chemicals, dental nail enhancement, etc. Hard alloy rotary files can cut and process various metal and non-metallic materials below HRC70 at will, with high processing efficiency and good surface quality.

 

 

 

1. Widely used for high-speed cutting tools, kiln structural materials, jet engine components, metal ceramic materials, resistance heating components, etc.

 

 

 

2. Used for manufacturing cutting tools, wear-resistant components, melting crucibles for metals such as copper, cobalt, bismuth, and wear-resistant semiconductor films.

 

 

 

3. Used as superhard tool material and wear-resistant material. It can form a solid solution with many carbides. WC TiC Co hard alloy cutting tools have been widely used. It can also be used as a modification additive for NbC-C and TaC-C ternary system carbides, which can reduce sintering temperature while maintaining excellent performance, and can be used as aerospace materials.

 

 

 

4. Tungsten carbide (WC) powder was synthesized using tungsten anhydride (WO3) and graphite in a reducing atmosphere at high temperatures ranging from 1400 to 1600 ℃. Dense ceramic products can be obtained by hot pressing sintering or hot isostatic pressing sintering.

Packaging Service：

1.With regards to the packing of the item,we prefer to use crates.

2.Each product is packed in pp bag,and then 10 units are put in one paper box,and 5 boxes in a export carton. The carton is full of foam at each corner.

3.Please see to it that fragile goods should be wrapped in soft material and firmly packed in cardboard box.

Shipping services:

Sea freight is one of the most popular choices for international shipping.

Air freight is another mode of transportation used for international shipping. It is fast and efficient, making it ideal for transporting perishable goods, such as food or medical supplies.

Rail freight, while not as common as sea or air freight, is an excellent option for shipping goods over land.

Road transport is the most popular mode of transportation for domestic deliveries. It is fast, efficient, and cost-effective for transporting small quantities of goods over short distances.

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