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Home » Companies » Bykhovsky Factory of Hard Alloys LTD
Bykhovsky Factory of Hard Alloys LTD

Hard alloys
Hard alloys

 

 

 

 

Hard alloys

 

 

 

Hard alloys are currently the common tool material, widely used in the tool industry. Due to the presence in the structure of refractory carbides carbide tool has high hardness HRA 80-92 (HRC 73-76), temperatures (800-1000 °C) so they can operate at speeds several times higher than the cutting speeds for high speed steel. However, unlike high speed steels, hard alloys have low strength (σи = 1000-1500 MPa), do not have toughness. Hard alloys low-tech: due to the large hardness of them cannot be manufactured by solid forming tool, in addition, they are partially polished only with diamond tools, hard alloys and therefore used in the form of plates that are either mechanically fixed to the tool holders of the tool or soldered to them.

Hard alloys because of their high hardness are applied in the following areas:

· Machining of structural materials: cutters, mills, drills, broaches, and other tools.

· Equipment measuring instrument: vehicle precise micrometric surfaces of the equipment and the supports of the weights.

· Branding: vehicle of the working of the brands.

· Drawing: the equipment of the working parts of the die.

· Stamping: vehicle dies and matrices.

· Rolling: carbide rolls (made in the form of rings made of hard alloy, wear on metal base)

· Mining equipment: brazed, sintered and welding of cast of hard alloys.

· Production of wear-resistant bearings: balls, rollers, cage and plating on steel.

· Rudoobrazovanie equipment: equipment work surfaces.

· Thermal spraying of wear-resistant coatings

Solid alloys are hard and wear-resistant metal-ceramic materials obtained by powder metallurgy methods, are able to maintain these properties at 900-1150 °C. is mostly made of very hard and refractory materials to snowcarbon tungsten, titanium, tantalum, chromium, cobalt or associated nicoletaylormusic ligament, with different contents of components.

Hard metals are distinguished by the metals of the carbides present in them: tungsten — BK2 ВК3,ВК3М, ВК4В, ВК6М, VK6, ВК6В, VK8, ВК8В, ВК10, ВК15, ВК20, ВК25; titanium-tungsten — Т30К4, T15K6, Т14К8, Т5К10, Т5К12В; titanium-tantalum-tungsten — ТТ7К12, ТТ11К8Б; ТНМ20, ТНМ25, ТНМ30.

The chemical composition of solid alloys klassificeret:

· wolframmathematica hard alloys (VK);

· titanomaghemite hard metals (TC);

· титанотанталовольфрамокобальтовые hard alloys (TTR).

Hard alloys for the purpose of sharing (classification ISO):

· R — for steel castings and materials, the processing of which produces long chips;

· M — for working hard materials (usually stainless steel);

· — For processing of cast iron;

· N — for machining aluminum and other nonferrous metals and their alloys;

· S — heat resistant alloys and alloys based on titanium;

· H — for hardened steel.

Due to the shortage of tungsten developed by the group of tungsten carbide, called cermet. These alloys contain in their composition the carbides of titanium (TiC), titanium carbonitrides (TiCN) associated nitelivebingo basis. Their production technology is similar wolframtones solid alloys.

These alloys compared to tungsten hard alloys have a lower bending strength, impact toughness, sensitive to changes in temperature due to low thermal conductivity, but have advantages — higher heat resistance (1000 °C) and low adhesion on treated materials, so not prone to built-up edge during cutting. Therefore, they propose to use for finishing and medium turning, milling. By appointment refer to the group R of ISO.
Item sintered hard alloys

Hard alloys can be divided into three main groups:

· wolframalpha hard alloys

· technologyprogramme hard alloys

· titanosauriform hard alloys

Each of these groups of hard alloys are divided in turn into stamps, differing in chemical composition, physical-mechanical and performance properties.

Some brands of alloy having the same chemical composition, different grain size of carbide components that determines the differences in their physico-mechanical and performance properties, and hence applications.

The designation of grades as follows:

1 group - alloys containing tungsten carbide and cobalt. Denoted by the letters VK, after which the numbers indicate the percentage content in the alloy of cobalt. This group includes the following brands:

VKZ, VKSM, VK6, ВК6М, ВК6ОМ, ВК6КС, ВК6В, VK8, ВК8ВК, ВК8В, ВК10КС, ВК15, ВК20, ВК20КС, ВК10ХОМ, ВК4В.

Group 2 - titanomaghemite alloys, having in its composition of titanium carbide, tungsten carbide and cobalt. Indicated by the letters TC, with the figure standing after the letter T indicates % content of the carbides of titanium, but after the letter To the cobalt content. This group includes the following brands: Т5К10, Т14К8, T15K6, ТЗ0К4.

Group 3 — titanosauriform alloys, having in its composition of titanium carbide, tantalum and tungsten and cobalt and denoted by the letters TTK, with the figure standing after the TT % content of the carbides of titanium and tantalum, and after the letter To the cobalt content. This group includes the following brands: ТТ7К12, ТТ20К9.

Group 4 — the alloy with wear-resistant coatings. Has a letter designation EAP. This group includes the following brands: ВП3115 (base VK6), ВП3325 (base VK8), ВП1255 (base ТТ7К12).

Hard alloys used for metal cutting: VK6, VKSM, ВК6М, ВК60М, VK8, ВК10ХОМ, Т30К4, T15K6, Т14К8, Т5К10, ТТ7К12, ТТ20К9.

Hard alloys used for bastrikova processing of metals and wood, wearing parts of machines, instruments and fixtures: vkz, VKSM, VK6, ВК6М, VK8, ВК15, ВК20, ВК10КС. ВК20КС.

The solid alloys used to equip mining tools: ВК6В, ВК4В, ВК8ВК, VK8, ВК10КС, ВК8В,ВК11ВК,ВК15.






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