WHITE BEAR knife handmade by master Pavlo Honcharenko, order to buy in Ukraine, steel K390™ 65 HRC)
- Brand: Студія ножів ручної роботи Павла Гончаренка
- Product Code: БІЛИЙ ВЕДМІДЬ - ніж роботи майстра Павла Гончаренка
| Загальна довжина клинка mm: | 280±05 мм |
| Матеріал леза | K390 blade - in stainless damask laminate through three layers of copper.BOHLER powder tool steel in stainless Damascus is a new martensitic steel from the Swedish-Austrian concern Bohler-Uddeholm |
| Твердість клинка (метал): | Загартованість - 65 HRC |
| Матеріал руків'я: | Hibuki, makume-gane guard and back, neuselber, tompak, amber in acrylic with mother-of-pearl, stabilized mammoth tooth, stabilized elk horn. 3mm Leather Cord Lanyard, Polar Bear Claw Beads with Fur Elements |
| Довжина леза | 145±05 мм |
- Availability: In Stock
Available Options
Description
TECHNICAL CHARACTERISTICS:
The name of the knife: WHITE BEAR, handmade knife by master Pavel Honcharenko, order to buy in Ukraine, steel K390™ 65 HRC
Knife type: Fixed blade
Brand: Workshop "Pavel Honcharenko's handmade knives"
sharpening angle: 36 degrees Sharpened
Downs: Straight
Taper: 0.3 mm
Blade hardness: 65 HRC
Overall length: 280 mm
Blade length: 145 mm
Blade width: 34 mm
Blade thickness: 4.0 mm
Handle length: 135 mm
Handle thickness: 30 mm
Bolster (guard) and back material: Makume-gane
Handle: Hibuki, guard and back made of makume-gane, neiselber, tompak, amber in acrylic with mother-of-pearl, stabilized mammoth tooth, stabilized horn moose Lanyard made of leather cord 3 mm, beads made of white bear claws with fur elements
Handle color: Coffee
Handle impregnation: Yes
Handle cover: Yes
Lace hole (for the lanyard): Yes
Lanyard: Lanyard, calfskin leather, sewn by hand with waxed thread. Strap made of leather cord 3mm, stabilized mammoth tooth
Scabbard: Stabilized elk horn. Wood carving, chamois calf leather, Italian genuine vegetable tanned leather, treated with water-repellent finish and impregnated with protective solutions, stitched with waxed thread. Manual embossing of the invoice. Free suspension, removable. Insert made of stabilized moose horn and mammoth tooth.
Model: ASGARD exclusive collector's knife handmade by studio master Pavlo Honcharenko, order to buy in Ukraine (Steel K390™ 64-65 HRC)
Model number: 147
Country of birth: Ukraine
Artisan: Master Pavlo Honcharenko, Ivankiv, Ukraine ( Workshop "Pavel Honcharenko's handmade knives" )
Best use : Hunting, carcass cutting, slicing
Knife condition: new
The price is indicated together with the scabbard.
A sharpened knife is not a cold weapon.
Our knives are very sharp, so open and use very carefully. We are not responsible for injuries related to 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, upon confirmation of your order, we will inform you about the availability or when the product will be ready. The product may differ slightly from the one shown in the photo.
Steel K390 for knives: advantages and disadvantages of the alloy
K390 steel from the Austrian company Bohler is considered one of the best for making knives and other cutting tools. This is a tool powder steel designed for the production of stamping tools by the method of cold deformation. It is mainly used for the manufacture of folding and hunting knives.
For the production of kitchen knives, as a rule, it is not used due to the high cost. Knives of the highest price category are made from this metal. But, like other types of steel alloys, the material has its advantages and disadvantages.
Features of K390 alloy
K390 steel is characterized by increased hardness, strength and wear resistance. It is a high-speed steel with high viscosity and resistance to mechanical wear. The special chemical composition ensures the high hardness of the material, thanks to which the cutting edge of the blade retains its sharpness for the longest time, even during hard use.
At the moment, the brand is considered one of the best tool steels for cutting tools on the market. In the production process, a homogeneous carbide structure is formed, which guarantees maximum hardness and wear resistance.
It has the following chemical composition:
Carbon (C) – 2.5%. Provides hardness, wear resistance and viscosity. Due to the high carbon content, the edge remains sharp for a long time.
Chromium (Cr) - 4%. Increases density and tensile strength. Provides protection against corrosion, but in this case it is insignificant, since the chromium content is not high. Slightly increases hardness.
Molybdenum (Mo) - 4%. Increases strength, hardness and firing. Promotes corrosion protection.
Silicon (Si) - 0.55%. Deoxidizes steel and increases strength.
Vanadium (V) – 9%. Improves viscosity and strength. Increases resistance to abrasion and rust formation.
Tungsten (W) – 1%. Increases viscosity, strength and firing. Hardness does not change under the influence of elevated temperatures.
Cobalt (Co) – 2%. Increases hardness and strength. Allows hardening at elevated temperatures. Strengthens the positive properties of other elements.
The HRC indicator (hardness value on the Rockwell scale) of this metal varies in the range of 62-66 units. This is one of the best indicators on the cutting tool steel market. Thanks to this hardness, the cutting edge retains its hardness for as long as possible. At the same time, it is quite difficult to sharpen such a hard alloy with household tools.
The material is relatively expensive, so premium segment knives are produced from it. At the moment, steel provides the maximum possible resistance of the cutting edge to abrasive wear. At the same time, high chip resistance and good impact strength are maintained.
Advantages of K390 steel
The main advantages of the Bohler K390 alloy include:
- Increased resistance of the cutting edge to abrasive and other mechanical wear. The closest analogue in terms of this characteristic is the CPM 10V brand, which was previously considered a standard, but lost to K390 in other parameters.
- Increased impact strength due to the presence of a sufficient amount of molybdenum, tungsten and cobalt. According to this characteristic, the metal is 1.5 times higher than CPM 10V.
- Good flexibility for grinding and polishing. This allows you to remove deep risks and other stress concentrators from the surface. The blade and cutting edge can be given an almost mirror-like shine.
- Increased compressive strength. This allows you to make all kinds of stamps, dies, tape knives and other parts.
- Resistance to chip formation. This ensures reliability and a long service life of finished products.
- Homogeneity of the structure. Due to this, the characteristics are stable over the entire area of the blade.
- High hardness - 62-66 HRC. Even with intensive and hard use, the sword remains sharp for a long time.
- Resistance to overheating during heat treatment. Steel withstands long-term heat treatment without deterioration of properties, which guarantees high-quality hardening and calcination.
- Possibility of making blades by forging method. This allows craftsmen to make unique collector's items.
- The possibility of additional improvement of working characteristics in the process of manufacturing finished products. For example, some manufacturers perform additional heat treatment using repeated thermal cycling and cryogenic treatment.
Large knife with K390 steel
Disadvantages of the alloy
Despite the huge number of positive characteristics, the material has some disadvantages:
High cost. Knives of the highest price category are made from this steel. It is used by large manufacturers. Although some private craftsmen produce products from this alloy in small batches. For the production of kitchen knives, as a rule, enyaets is not used.
Low resistance to corrosion. The composition contains quite a lot of carbon and little chromium, so the material can rust. This is a kind of payment for maximum hardness. Therefore, the knife requires proper and regular maintenance.
It is quite difficult to sharpen the edge yourself. The steel is very hard, so it is difficult to sharpen. To do this, you need to use special sharpening tools, such as diamond and elbor blocks. The complexity of sharpening is one of the secondary factors of the high cost of finished products.
Risk of injury. When sharpened with a knife, it is very easy to cut yourself, so you should work with it carefully.
Small selection of models. Only a few large manufacturers and private craftsmen make knives from this alloy. At the moment, the company offers the largest number of models
Conclusions and recommendations
Steel K390 is deservedly considered one of the best tool alloys on the market for the production of cutting tools. However, products made of this material cannot be called a good choice for every person. Knives with K390 blades are quite expensive, and the selection of models is small.
Large companies produce products in small batches, and individual craftsmen often produce only to order. Therefore, such products can be recommended to professionals who are familiar with steels and the peculiarities of their operation. Such a blade must be properly cared for, otherwise it can become covered with rust and pitting, which often affects not only the appearance, but also the performance characteristics.
The K390 knife should be used carefully, as a damaged edge will be expensive to restore due to the difficulty of resharpening. Otherwise, K390 is an excellent powder steel for making premium quality knives.
Well, you can buy a Damascus steel knife on the portal https://knife.net.ua/ on our website or by contacting us by phone +380961711010.
Happy shopping! We will be glad to see you among our customers!
Tompak or Bakunt
Tompak or bakunt is a type of brass with 88-97% copper and up to 10% zinc. It has high plasticity, anti-corrosion and anti-friction properties. Copper alloys with a zinc content of 10-20% are called semi-tompaks.
Reinvented by the European civilization of London watchmaker Christopher Pinchbecker (c. 1670-1732), the tompac was known in the past to the Moche civilization of Peru in particular.
Sometimes names are used for the alloy: chrysochalcus, similor, oreide, chryzorin, princemetal, etc.
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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