VK8 plate, hard alloy
Supplier — AvekGlob company — offers at affordable prices from the manufacturer plates made of a solid alloy grade VK8. The supplier guarantees the timely delivery of products to any address specified by the consumer.
The VK8 solid alloy is a highly melting compound of solid, ceramic tungsten carbide with viscous cobalt. This material is a composite of a metal matrix in which cobalt particles are placed in a matrix of tungsten carbide. Tungsten carbide may have the formula WC or WC 2, depending on the synthesis conditions.
A characteristic feature of this alloy is high strength, compression and hardness resistance, high electrical and thermal conductivity, at sufficiently low values of plasticity, toughness and shear resistance. The closest European analogues of the material are the hard alloys HG30 and HG40.
Urgency of application
The VK8 grade alloy is used in the manufacture of particularly strong tooling by pressing and sintering methods. It is used for making both cutting and cold-setting tools. To increase strength and rigidity, surface coatings are used. The VK8 alloy is sensitive to bending loads, and therefore is used mainly in the processes of obtaining axisymmetric billets.
In accordance with the technical requirements of GOST 3882−74, VK8 alloy has the following composition:
Tungsten carbide — 92%;
Cobalt — 8%.
Physical and mechanical properties
The melting point is 2862 ° C;
Strength limit, MPa — 1400;
Density, kg / m 3 — 14400… 15600;
Bending strength, MPa — 1700;
Compressive strength, MPa — 4900;
Modulus of elasticity, GPa — 600;
Hardness according to Rockwell (scale A), 87.5;
Impact strength, kJ / m 2 — 13,0.
Assortment and properties
The hard alloy VK6 is obtained by sintering the dimensions of the initial mold taking into account the shrinkage. Available plates, discs and cylinders of various sizes. It is possible to obtain plasticized plates, previously sintered at high temperature. To obtain the final product it is necessary to use the technologies of electric spark, electric-arc or anodic-mechanical treatment. Less effective grinding with carborundum circles, followed by grinding with powders of boron carbide.
Supplier — the company AvecGlob — offers to purchase at affordable prices from the manufacturers of plates that are made of a solid alloy grade VK8. Products can be bought at a price formed on the basis of European and world standards of production. Implementation is possible in bulk and retail, for regular customers, a flexible system of discounts operates.