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NEPHRITE 3.0 knife, handmade by the master SERHIA DROZDA, buy to order in Ukraine, steel - CPM® S125V™ in stainless Damascus, 64 HRC
NEPHRITE 3.0 knife, handmade by the master SERHIA DROZDA, buy to order in Ukraine, steel - CPM® S125V™ in stainless Damascus, 64 HRC
NEPHRITE 3.0 knife, handmade by the master SERHIA DROZDA, buy to order in Ukraine, steel - CPM® S125V™ in stainless Damascus, 64 HRC
NEPHRITE 3.0 knife, handmade by the master SERHIA DROZDA, buy to order in Ukraine, steel - CPM® S125V™ in stainless Damascus, 64 HRC
NEPHRITE 3.0 knife, handmade by the master SERHIA DROZDA, buy to order in Ukraine, steel - CPM® S125V™ in stainless Damascus, 64 HRC
NEPHRITE 3.0 knife, handmade by the master SERHIA DROZDA, buy to order in Ukraine, steel - CPM® S125V™ in stainless Damascus, 64 HRC
NEPHRITE 3.0 knife, handmade by the master SERHIA DROZDA, buy to order in Ukraine, steel - CPM® S125V™ in stainless Damascus, 64 HRC
NEPHRITE 3.0 knife, handmade by the master SERHIA DROZDA, buy to order in Ukraine, steel - CPM® S125V™ in stainless Damascus, 64 HRC
NEPHRITE 3.0 knife, handmade by the master SERHIA DROZDA, buy to order in Ukraine, steel - CPM® S125V™ in stainless Damascus, 64 HRC
NEPHRITE 3.0 knife, handmade by the master SERHIA DROZDA, buy to order in Ukraine, steel - CPM® S125V™ in stainless Damascus, 64 HRC
NEPHRITE 3.0 knife, handmade by the master SERHIA DROZDA, buy to order in Ukraine, steel - CPM® S125V™ in stainless Damascus, 64 HRC

NEPHRITE 3.0 knife, handmade by the master SERHIA DROZDA, buy to order in Ukraine, steel - CPM® S125V™ in stainless Damascus, 64 HRC

Загальна довжина клинка mm: 250±05 mm
Матеріал леза Blade steel - CPM® S125V™ laminate in stainless Damascus covers - high-alloy martensitic stainless tool steel produced by Crucible Industries (USA).
Твердість клинка (метал): Hardness - 64 HRC
Матеріал руків'я: Combined. Guard and buttplate stainless damask, ebony or ebony and stabilized mammoth tusk
Довжина леза 125±05 mm
  • Availability: In Stock
35,000.00 грн.

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Description

SPECIFICATIONS:

The name of the knife: NEPHRITE 3.0 knife, handmade by the master SERHIA DROZDA, buy to order in Ukraine, steel - CPM® S125V™ in stainless Damascus, 64 HRC
Knife type: Fixed blade
Brand: Studio of exclusive handmade knives SERGIA DROZDA


Steel brand: Blade steel - CPM® S125V™ laminate in stainless Damascus covers - high-alloy martensitic stainless tool steel produced by Crucible Industries (USA).
Steel sheet: One-piece cast, through-mounting on screed and resin
Blade Sharpening Angle: 36 Degree Pointed
Microfeed: 38 degrees - (the cut on the shin of the forearm is simply wild - the comment of the master)
Descents: Straight
Reduction: 0.3 mm
Blade hardness: 64 HRC
Overall length: 275mm
Blade length: 125mm
Blade width: 35mm
Blade thickness: 4.2 mm
Handle length: 125mm
Handle thickness: 24mm
Grinding of the blade: Blade finish - manual longitudinal satin
Bolster and back material: Made of stainless damask
Handle material: Combined. Guard and buttplate stainless damask, ebony or ebony and stabilized mammoth tusk
Handle Color: Brown
Handle Impregnation: Yes
Sleeve Cover: Yes
Lanyard hole (for lanyard): None
Temlyak: Absent
Scabbards: 3.5mm genuine vegetable tanned leather, treated with water repellent finish and impregnated with protective solutions, wax impregnation, stitched with waxed thread. Manual embossing of the invoice. Finish with Apretura. Free suspension
A gift box is included


Model: NEPHRITE 3.0 knife, handmade by the master SERHIA DROZDA, buy to order in Ukraine, steel - CPM® S125V™ in stainless Damascus, 64 HRC
Model number: 021
Country of birth: Ukraine
Master: Master Serhiy Drozd, knife studio "SERGIYA DROZDA",  Khmelnytskyi , Ukraine. Studio of exclusive handmade knives SERGIA DROZDA
Best use: Multi-purpose: hunting, fishing, tourism, household - cutting, etc.
Knife condition: new
The price is indicated with the sheath.

 


A sharpened knife is not a cold weapon.

Our knives are very sharp, so be very careful when opening and handling them. We are not responsible for any injuries resulting from the use of our knives.
Our products are intended for legal use only by responsible buyers. We will not sell our products to anyone under the age of 18.


Availability changes regularly, after confirming your order we will notify you of availability or when the item is ready. The product may differ slightly from the one shown in the photo.


Powdered steel Crucible CPM® S125V™
CPM® S125V™ is a high-alloy martensitic stainless tool steel manufactured by Crucible Industries (USA). The corrosion resistance of the alloy is comparable to ZDP-189, that is, it is quite high. Steel ZDP-189 contains 20% chromium versus 14% for CPM S125V. The amount of carbon is about the same. It would seem that 125ya should rust more, but in ZDP-189 much more chromium goes into carbides than in S125V, where vanadium also goes into carbides. As a result, the chromium content in the solid solution for both steels is not so different.

Recently, many knife manufacturers have abandoned the CPM S125V, primarily due to the complexity of the finish. Custom craftsman Phil Wilson (Phil Wilson) said that handmade satin S125V takes three times longer than for CPM 10V - one of the most difficult steels (more or less mass-produced).

The steel is made using the technology of amorphous metal alloys, better known among knife makers and hobbyists under the acronym CPM (Crucible Particle Metallurgy). The CPM process makes it possible to produce a very uniform, high quality steel that is characterized by superior stability, uniformity and toughness compared to steels from traditional heat production.

Powdered high speed steel was developed in Sweden in the late 60s of the last century. The powder metallurgy method makes it possible to introduce more alloying elements into the steel without reducing the strength and machinability.

Powder steel, unlike ordinary steel, is fed in molten form through a special nozzle through a stream of liquid nitrogen. Steel quickly hardens into small particles. The result is a powder with a uniform arrangement of carbides (the place of accumulation of carbides is the place where cracks originate). Carbides perform the same function in the composition of steel as cobblestones on the street: they (carbides) are harder than the steel surrounding them, and contribute to its increase in wear resistance.

The resulting powder is sieved and placed in a steel container in which a vacuum is created. Next, the contents of the container are sintered at high temperature and pressure - thus achieving material homogeneity. This process is called hot isostatic pressing. The steel is then pressure treated. The result is a high speed steel with very small carbide particles evenly distributed in the steel substrate. The resulting steel can be rolled in the traditional way, as well as serial grades of steel, resulting in its increased strength.

Differences in the wear resistance of different grades of powder steel are explained by the presence of different carbides in their composition in different proportions and with different distribution uniformity throughout the steel volume. Of two steels having approximately the same hardness, the more wear-resistant will be the one in which there are more carbides or they are harder.

Steel composition:

C 3.3% - the carbon content in the alloy is 3.3%. Carbon is the most important element in steel, it increases its strength and gives the metal good hardness.

Cr 14.0% - the chromium content in the alloy is 14.0%. Chromium is a greyish-white lustrous hard metal. Chromium affects the ability of steel to harden, gives the alloy anti-corrosion properties and increases its wear resistance. Contained in stainless steel of any brand.

Mo 2.5% - the molybdenum content in the alloy is 2.5%. Molybdenum is a silvery white metal. Molybdenum is a hard-melting element, it prevents brittleness and brittleness of the blade, giving it the necessary rigidity, making it sufficiently resistant to high temperatures.

V 12.0% - the content of vanadium in the alloy is 12.0%. Vanadium is a grayish-white lustrous metal with great hardness. It is responsible for elasticity and enhances the properties of chromium, makes the metal inert to aggressive chemical environments.


Well, you can buy a knife made of Steel Crucible CPM® S125V™. Composition and properties. on our website knife.net.ua or by contacting us by phone +380674072030

It is worth remembering that when using a knife for its intended purpose and with careful handling, the knife will serve you for a very, very long time.


Ebony tree Botanical name: Diospyros crassiflora.

Characteristics of wood

Ebony tree Botanical name: Diospyros crassiflora.
Black (or black with stripes) wood of some tropical trees of the genus Persimmon (Diospyros), which grow in the humid tropical forests of West, Central and East Africa, South and Southeast Asia, on the islands of the Indian Ocean, in the monsoon forests of India and the island of Ceylon. Heartwood without noticeable annual rings is very hard and heavy and belongs to the most valuable wood species. The yellow-gray sapwood, which is removed from the tree immediately after felling, can occupy up to 70% of the trunk and is never sold, as it is considered unattractive. The density of ebony is up to 1300 kg / m³ at a humidity of 15%. This wood sinks in water.

Technical properties of wood

The average density of ebony is 1300 kg / m3.
Ebony: Core black wood with no visible annual rings. The yellow-gray sapwood, which is removed from the tree immediately after felling, can occupy up to 70% of the trunk and is never sold, as it is considered unsightly.

Using

Ebony wood is primarily used in the manufacture of furniture. It is also used for marquetry and veneer or in the manufacture of musical instruments (for example, fretboards for violin instruments, frets, pegs), billiard cues and in art. It is known from history that it was a favorite tree for door and window handles, cutlery handles, trimmings were used to make knitting needles and hooks or for razor handles.


HANDLE MATERIAL - MAMMUT TOOTH

Mammoth tooth is a rare raw material used to make decorative items, such as knife handles, pistol grips, and jewelry. This is a unique natural element, which can be obtained infrequently, so its cost is quite high.

Today, a mammoth tooth, after a certain processing (stabilization), is widely used by master knifemakers. Stabilization is the process of polymerizing a material under vacuum with or without fat-soluble dyes, while the material is impregnated with polymeric substances through and through.

HANDLE MATERIAL MAMMUT TOOTH

Mammoth tooth is an ornamental material of animal origin. Its exceptional feature is the fact that its source is extinct animals - mammoths. Paleontologists found that they lived on Earth about 10 thousand years ago, and their number was very large. The teeth of mammoths were not permanent, and changed about four times during their lives. Fallen teeth, which modern scientists find during excavations, become the basis for decorative elements, among which there are knife handles.

Due to the long stay in the soil, the material acquired a very unstable structure - the enamel received stone hardness, and the dentin, on the contrary, became loose. But modern material stabilization technologies have helped turn mammoth teeth into an excellent base for creating luxurious knife handles. The polymer composite provides products with resistance to corrosion and moisture, and the natural base gives a unique texture and intricate pattern.

Material Features

Mammoth molars are used to create a variety of products. Outwardly, they look like elephant teeth, but they are much larger and have a different shade. Given the historical value and rarity, the mammoth tusk is especially highly valued, since this animal died out long before our era. The tusks of prehistoric giants can be found not only in paleontological museums, but also on the shelves of jewelry stores, they are used to decorate the interior, they are used to create various decorative elements - of course, not in their original form, but in a processed one.

The age of the material, according to scientists, is 10-40 thousand years. How mammoths lived is not fully understood to date. However, the remains of these giants found by scientists, their bones, teeth, even whole carcasses, allowed scientists to make serious progress in this area of ​​research. The available data made it possible to find out what the appearance of mammals was, what they ate, in what climatic conditions they lived, what kind of behavior they had (for example, they led a herd or solitary existence).

The mammoth ate almost the same as the modern elephant: its diet was plant foods. In the modern world, an animal could eat coniferous plants. They preferred roughage, which they chewed without difficulty with their strong jaws and teeth like large plates. An interesting feature of the mammoth organism was that as the old tooth wore out, a new one grew, which displaced the old one and took its place. Thus, the animal could change its teeth several times in a lifetime. Completely all the teeth changed in about a ten-year interval, and the average life expectancy of a mammoth was 40 years. In other words, one animal could survive on average four complete changes of molars. It is due to this feature that people often find individual worn-out mammoth teeth, but do not meet other traces of it.

Appearance

If you look at the tooth of a mammoth, you can see a heterogeneous surface with ribbed edges. Bone, enamel and soft tissue alternate in this case. The material has a rather complex structure:

its basis is dentin.

The dentin layer is covered with a protective enamel.

It is worth noting that the mammoth had only 4 molars and 2 tusks, which protruded outward and served mainly for self-defense.

After special processing, the molar can be used to make a variety of jewelry products. The density of the material is very high and resembles a stone. In order to process such a product, the master will need to spend a lot of time and effort.

Raw material stabilization

So that the tooth and tusk do not collapse during use and the manufacture of the product from it, stabilization technology is used. This is a critical stage of processing, in which the following technologies are used:

Polycondensation.
vacuum processing.
Application of special dyes.

All voids of the tooth are filled with a polymeric substance, due to which the base acquires reliable protection from climatic influences. Such a product does not deform, cracks do not appear on it, it becomes able to withstand high temperatures. The appearance of the material also changes, becoming more attractive and unique.
 


Before the advent of this technology, mammoth teeth and bones were rarely used for making souvenirs, as they did not have sufficient strength due to the large number of cracks and delaminations inside. In addition, tooth enamel has a high hardness, which, when processed, quickly renders the saw unusable. A stabilized product is much easier to post-process. The mammoth tooth has become especially popular in the manufacture of knife handles. It looks unusual, attractive, and if you add dye, you can create a unique pattern that can give even such a rare thing a special personality.

 

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