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Carbide Rods Have Wear Resistance

Jul 31, 2017

Carbide round Rod is a kind of cemented carbide tungsten steel (WC) as the main raw materials, coupled with other precious metals and paste through the use of powder metallurgy method to suppress sintering of high hardness, high-strength alloy materials.

Cemented carbide rods are widely used in the field of production and processing: such as: micro-drill in the PCB industry, electrode rods in the photoelectric communication industry, tungsten carbide drills, drill shank, top, push rod, wear-resisting precision parts, CNC milling cutters and tool materials with holes.

Carbide rods are carbides in transition metals in the periodic table, such as tungsten carbide, titanium carbide, and tantalum carbide, their hardness is very high, Carbide Round Bar melting point is more than 2000 ℃, some even more than 4,000 ℃. In addition, the transition metal nitride, Boride, Silicide has similar properties, but also can be used as a hardening phase in cemented carbide. The existence of hardened phase determines that the alloy has extremely high hardness and wear resistance. Bonded metals are usually ferrous metals, often cobalt and nickel.

When making cemented carbide, the particle size of the raw material powder is between the micrometer and the high purity. Raw materials in accordance with the provisions of the proportion of ingredients, added to alcohol or other media in the wet grinding ball mill, Carbide Round Bar so that they are fully mixed, crushed, after drying, after the addition of wax or plastic, such as a type of molding agent, and then after drying, sieving to make the mixture. Then, when the mixture granulation, pressure type, heating to close to the bonding metal melting point (1300~1500℃), hardening and bonding metal formed eutectic alloy. After cooling, the hardening phase is distributed in a grid of bonded metal, closely interconnected to form a solid whole. Hardness of cemented carbide depends on the content of hardening phase and grain size, that is, the higher the content of hardening phase, the finer the grain, Carbide Round Bar the greater the hardness. The toughness of cemented carbide is determined by bonding metal, the higher the bond metal content, the greater the flexural strength.

Cemented carbide rods are powder metallurgy products sintered in a vacuum furnace or a hydrogen reduction furnace, with high hardness refractory metal carbides (WC, tic) micron powder as the main ingredient, cobalt (CO) or nickel (NI) and molybdenum (MO) as binder. Carbide Rods Ⅳb, ⅴb, ⅵb metal carbide, nitride, boron, etc., Carbide Round Bar due to hardness and melting point is particularly high, collectively referred to as cemented carbide. The structure, characteristics and applications of hard gold are described below as the focus of carbide. Carbide Rods Ⅳa, ⅴa, ⅵa metal and carbon formed in the metal carbide, due to the small carbon atom radius, can be filled in the metal character gap and retain the original metal lattice form, forming a solid solution. Under appropriate conditions, such solid solution can continue to dissolve its constituent elements until saturated. Therefore, Carbide Round Bar their composition can be changed within a certain range (e.g., the composition of titanium carbide is changed between the TiC0.5~tic) and the chemical formula does not conform to the valence rule. When the dissolved carbon content exceeds a certain limit (e.g., ti:c=1:1 in titanium Carbide), the lattice type will change to make the original metal crystal lattice turn into another form of metal crystal lattice, when the solid solution is called an interstitial compound. Metal carbide, especially Ⅳb, ⅴb, ⅵb metal carbide melting point is more than 3273K, of which the carbonation of hafnium, Tantalum carbide, respectively, 4160K and 4150K, is currently known to be the highest melting point of the matter. Most carbide hardness is very large, Carbide Round Bar their microhardness is greater than 1800kg·mm2 (Microhardness is one of the hardness of the expression method, more used for cemented carbide and hard compounds, microhardness 1800kg·mm2 equivalent to a diamond hardness of 9). Many carbides are not easily decomposed at high temperatures, and their antioxidant capacity is stronger than their constituent metals. The best thermal stability of titanium carbide in all carbides is a very important metal carbide.  However, in an oxidizing atmosphere, all carbides are easily oxidized at high temperatures, which can be said to be a major weakness of carbides. Carbide Rods In addition to carbon atoms, nitrogen atoms, boron atoms can also enter the metal lattice gap, the formation of a solid solution. They are similar to the properties of the filled carbide, Carbide Round Bar which can conduct electricity, heat conduction, high melting point, large hardness, and brittleness.

Carbide rods can also be used to make rock drilling tools, mining tools, drilling tools, measuring gauges, wear-resistant parts, metal abrasives, cylinder liner, precision bearings, nozzles and so on.