COYOT knife handmade by master Pavlo Goncharenko, buy to order in Ukraine, steel - M390 in stainless steel laminate 95x18, 64 HRC
- Brand: Майстерня ножів ручної роботи Павла Гончаренка
- Product Code: КОЙОТ - ніж ручної роботи майстра Павла Гончаренк
| Загальна довжина клинка mm: | 280±05 mm |
| Матеріал леза | Blade steel - M390 thermocyclic treatment (TCT) Powder steel BOHLER M390 MICROCLEAN is produced at the enterprises of Austria by Bohler-Uddeholm AG |
| Твердість клинка (метал): | Cutting edge hardness 64 HRC |
| Матеріал руків'я: | Stainless steel, bronze, end macume-gane, stabilized mammoth tooth, stabilized oak shaft, mosaic lanyard tube and foam. |
| Довжина леза | 145±05 mm |
- Availability: Під замовлення
Available Options
Description
SPECIFICATIONS:
COYOT knife handmade by master Pavlo Goncharenko, buy to order in Ukraine, steel - M390 in stainless steel laminate 95x18, 64 HRCLARK handmade knife by Pavel Honcharenko, order to buy in Ukraine, steel - k110 in stainless steel laminate 95x18 through nickel, 61 HRC
Knife type: Fixed blade
Brand: Pavlo Honcharenko's Handmade Knives Studio
Blade sharpening angle: 35 degree sharpened
Downcuts: Straight
Blade hardness: Cutting edge hardness 61 HRC
Total length: 280 mm
Blade length: 145 mm
Blade width: 33 mm
Blade thickness: 4.0 mm
Handle thickness: 33 mm
Blade finish: 600 grit hand-satin finish.
Bolster and back material: Stainless steel
Handle: Stainless steel, bronze, end macume-gane, stabilized mammoth tusk, stabilized oak split, mosaic lanyard tube and foam.
Lanyard: 3mm braided nylon cord lanyard, oak split beads.
Handle impregnation: Yes
Handle coating: Sanding
Lanyard hole: Yes
Condition of the knife: New
Price: Indicated with the scabbard and gift case
Model number: 162
Craftsman: Master Pavlo Honcharenko, Ivankiv, Ukraine Pavlo Honcharenko's Handmade Knives Studio
Best use: Hunting, fishing, tourism, household, carcass division, 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 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.
Steel M390: composition, decoding and application
Damascus steel has long held a leading position in terms of strength, reliability and durability. Modern technologies have allowed us to obtain a new type of material with the best performance - M390 steel. It was first introduced in Austria by Bohler-Uddeholm AG in the early 1990s.
Due to its high technological characteristics, the material quickly gained recognition and began to be used for the manufacture of knives. Its main properties include:
- Hardness (60-62 HRC) is due to the unique structure of the crystal lattice with a solid structure. This result was obtained on the basis of careful adjustment of the composition and ratio of components. Steel grade M390 is subjected to hardening, which significantly increases its strength.
- The use of vanadium and tungsten. Sharpening knives is carried out using tabletop units, since the use of a water stone will significantly complicate the process. After such processing, the knife remains sharp for a long time.
- The possibility of mirror polishing due to the high hardness of the metal. The smooth polished surface of M390 steel is characterized by the same reflective ability as a mirror.
Decoding and chemical composition
Today, the composition is widely used for the manufacture of cutting tools, including knives. It refers to materials of the powder production method, during its processing, the raw material is crushed and baked in molds at a temperature of up to 1500 degrees. This allows the use of a significant part of the alloying elements, which improves the characteristics of M390 steel.
The development of the metal was carried out on the basis of EU standards, according to which the chemical composition of M390 steel, in addition to iron, includes:
- Carbon in the amount of 1.85±0.05%. It is necessarily present in the metal of high hardness, binding the molecules of Ferrum (Fe) increasing mechanical properties. On the other hand, its presence worsens the processability of processing and increases brittleness. However, steel is considered the optimal material in the ratio of brittleness to strength.
- Chromium is contained in steel in an amount of 20±1%. It is intended to improve mechanical performance and corrosion resistance as a result of heat treatment. Increasing the concentration of this chemical element in steel grade M390 guarantees an extension of the period of trouble-free operation under cyclic loading and abrasive action.
- Silicon and manganese are contained in the metal in the amount of 0.7±0.1% and 0.25±0.05%, respectively. They are deoxidizers that prevent chemical elements from the air from entering the alloy during manufacturing. Due to them, chemical leaching is reduced, strength and surface quality are increased.
- Molybdenum and vanadium are contained in amounts of 1% and 3-4%, respectively. They are characterized by a high melting point, which increases the material's resistance to elevated temperatures, hardness, and improves technical properties.
- Tungsten in steel in an amount of 0.6±0.1%. It increases its strength and has the maximum effect on this indicator compared to other components.
Material features
The advantages of the alloy include:
- excellent plasticity with significant hardness;
- corrosion resistance, inability to oxidize in air and at t = 800 degrees;
- lack of reaction to the effects of many acidic and alkaline substances;
- preliminary heat treatment, which includes hardening and high tempering;
- strength that ensures failure under significant load, which is 1.4 times higher than the similar indicator of high-speed steels. The difference between the yield strength and tensile strength is practically absent;
- Knives made from M390 stay sharp for a long time.
The only disadvantages are the cost of the material and the difficulty of sharpening and grinding.
Knife from M390
Technical characteristics
M390 steel is characterized by the following main parameters:
- melting point 1300-1400 degrees;
- hardness 65 units according to Rockwell;
- ultimate strength of 900 MPa;
- the beginning of destruction is 850 MPa.
Application
The metal is used to make knife blades, surgical instruments, and industrial cutters. Knives are characterized by high hardness and the ability to withstand strong dynamic effects. They remain sharp for six months if the operating rules are followed. The only negative qualities are the difficulty of sharpening, which requires special equipment - a machine tool. It is also important to have skills in this process.
Analogues
Only the American product Duratech 20CV can be considered an analogue of M390 steel, which is due to the recent appearance of the metal on the market.
I also recommend looking at the following steel grades:
40XN;
12X18X10T.
Oak
Stabilized oak column
Many plants commonly called "oaks" do not belong to the species Quercus , such as African oak, Australian oak, bull oak, Jerusalem oak , poison oak, river oak, silky oak , brown oak , Tasmanian oak, and tulip oak.
oak, (genus Quercus), a genus of about 450 species of ornamental and woody trees and shrubs in the beech family (Fagaceae), common in the northern temperate zone and at high altitudes in the tropics. Acorns serve as fodder for small game, are used for fattening pigs and poultry; the acorns of some species can be made into flour for human consumption. Lumber from red and white oak is used in construction, flooring, furniture, joinery, cooperage, making sleepers, structural beams, and mine supports.
Physical description
Quercus species are characterized by alternate, simple, deciduous or evergreen leaves with lobed, toothed or entire margins. Male flowers are borne in yellow racemes that appear with or after the leaves. Female flowers occur on the same tree , singly or in two- or many-flowered spikes; each flower has a sheath of overlapping scales that enlarges to contain a fruit or acorn , which matures in one or two seasons. White oaks have smooth leaves without bristles at the tips, sometimes with glandular margins. Their acorns mature in one season, have sweet-tasting seeds, and germinate within a few days after falling. Red and black oaks have bristly leaves, hairy acorn shells, and bitter fruits that ripen late in the second growing season .
Oaks can be easily propagated from acorns and grow well in moderately moist, rich soil or dry, sandy soil. Many will regrow from stump sprouts. They are hardy and long-lived, but not shade-tolerant and can be damaged by leaf-eating organisms or oak wilt fungus.
Main types and uses
The taxonomy of the genus Quercus is complicated by the large number of natural hybrids . Oaks can be divided into three groups, sometimes considered subgenera: white oaks ( Leucobalanus ), red and black oaks ( Erythrobalanus ), and ( Cyclobalanus ).
In North America, several oaks have ornamental landscape value, including the common oak ( Q. palustris ) and the northern red oak ( Q. rubra ). White oak ( Q. alba ) and common oak ( Q. macrocarpa ) form picturesque oak groves in the midwestern United States . Many oaks native to the Mediterranean have economic value: the galls formed on the branches of the Aleppo oak ( Q. infectoria ) are a source of Aleppo tannin , which is used in the manufacture of ink; commercial cork is obtained from the bark of the cork oak ( Q. suber ), and the tannin-rich kermes oak ( Q. coccifera ) is the host of the kermes beetle , which was once harvested for the dye contained in its bodily fluids .
Two East Asian oaks are also of economic importance: the Mongolian oak ( Q. mongolica ) provides useful timber, and the Chinese cork oak ( Q. variabilis ) is a source of black dye and is also a popular ornamental plant. Other cultivated ornamental plants include the Armenian or Pontic oak ( Q. pontica ), the chestnut oak (Q. castaneaefolia ) , the golden oak ( Q. alnifolia ), the Holm oak, the orpad oak, the oak ( Q. ilex ) , the Italian oak (Q. frainetto ) , the Lebanese oak ( Q. libani ), the Macedonian oak ( Q. trojana ) , and the Portuguese oak ( Q. lusitanica ). Popular Asian ornamentals include the Japanese blue oak (Q. glauca ) , the daime oak (Q. dentata ) , the Japanese evergreen oak ( Q. acuta ) , and the saw-toothed oak ( Q. acutissima ) . The English oak ( Q. robur ), a hardwood tree native to Eurasia and North Africa, is cultivated in other regions of the world as an ornamental.
From "woodlands blogs"
In early October, BBC4 aired a 90-minute documentary that shows every aspect of the life of an ancient English oak tree over the course of a year. Oak: Nature’s Greatest Survivor focuses on a single tree in Witham Woods , near Oxford, a site purchased by Oxford University in 1942 for woodland research. The film, presented by zoologist, entomologist and broadcaster George McGavin , begins with a high-tech assessment of the tree’s condition. By firing laser pulses, foresters create a three-dimensional virtual image of the oak tree so they can track its size and shape over a 12-month period.
At its peak in late August, it is 19 meters tall and 30 meters wide and contains about 700,000 leaves. Its roots extend 30 meters from the trunk, and a digital scan in mid-January showed that it weighs almost 10 tons.
As the days shorten and temperatures drop, the nearly 400-year-old oak tree is forced to undertake what McGavin calls “ a colossal reallocation of its resources ”—the first of four seasonal transformations it needs to survive. “ Under the influence of hormonal signals, the trees begin to break down pigments and nutrients in their leaves to store them for the winter ,” he says, creating spectacular fall colors .
After the nutrients are removed, the leaves drop. But the leaf drop is not caused by cold weather. In fact, the oak can perceive red light in the spectrum using a chemical pigment ( the phytochrome system ) in the leaf cells, which allows it to measure the hours of daylight. In October, when the oak produces acorns, there are six hours less sunlight each day than at the height of summer.
In winter – the “most dangerous time of year” for an oak – a bare tree has to stay alive in the bitter cold with almost no energy expenditure. The bark acts as a blanket, but if the fluid inside the oak freezes, the tree suffers catastrophic damage. In doing so, it draws fluid from its cells, dehydrating itself. The remaining fluid has a high concentration of sugar – “ a kind of antifreeze ,” according to McGavin.
The oak tree stores most of its nutrients in its roots during the winter months. But the root system alone is not enough to extract vital minerals from the soil. The oak also needs a “vast army of microscopic threads” to survive, including mycorrhizal fungi to extract phosphate from the surrounding soil.
Spring brings an “epic growth spurt,” and by late April, the male flowers—the catkins—appear. Filled with pollen grains, they are dispersed by the wind to fertilize the female flowers and create acorns that will continue the oak’s life cycle. A month later, the oak is in full bloom and is teeming with insects. Among them is the larva of the winter borer , which eats 27,000 times its weight in young oak leaves. The oak can recognize chemicals in the creature’s saliva and defends itself by producing phenolic and tannins to inhibit the larva’s growth. Meanwhile, gall wasps lay their eggs in the female flowers, prompting galls to grow in place of the acorns. This is where the wasp larva develops. There are hundreds of species of these wasps, each with its own unique gall structure. One of these galls – a sphere made by the wasp Andricus collari – produces an indelible ink when ground up and mixed with water, ferrous sulfate, and gum arabic. Gall ink was used in historical documents for 1,400 years until the 19th century.
Oak was also an important building material in ancient times. 13th-century masons used 2,641 tons of oak to build Salisbury Cathedral, which was felled in the spring of 1222.
The wood came from Ireland as well as England, although English oak, with its wide bands of early wood, was preferred over Irish wood with its denser rings. its lightness and strength. And in the 18th and 19th centuries, oaks began to be planted in Britain in large numbers to supply timber for warships. It took 6,000 oaks to make HMS Victory – “a product of the medieval acorns that were scattered all over Britain ”. The curved branches of the oak were particularly useful for creating figured hulls.
By August of its second year, 3-D imaging shows that the oak has created 230 kg of new wood in 12 months, produced from the carbon dioxide (and water) absorbed during photosynthesis. It has also released 234,000 liters of oxygen into the atmosphere from the stomata of its leaves.
Other results of the documentary:
-
How oak trees react to gale force winds. At the Forestry Commission's research site outside Edinburgh, scientists rig an oak tree with sensors and then turn it upside down until it's uprooted. Their instruments show that it starts to fall when it's just six degrees off the vertical, but it would take a force 10 storm to have the same effect.
-
How much water does an oak tree pump out of the ground in spring? Probes attached to a sap flow monitor measure this at 70 kg per hour at its peak, passing to the leaves through the xylem vessels. The cambium produces new cells that differentiate to form xylem and phloem tissue.
-
When oaks took hold in Britain after the Ice Age. Four-metre peat cores taken from Wytham Fen show oak pollen preserved in the soil, first appearing 9,000 years ago.
You can watch Oak Tree: Nature's Greatest Survivor on BBC iPlayer until 31 October 2015. Click here for the link.
The above post was sent by the user
-
Jeff Segal, a carpenter with an interest in tree identification, cultivation, history and conservation – first appeared on Timberyard.co.uk with various images – see here
HANDLE MATERIAL - MAMMOTH TUSK
Mammoth tusk is a rare raw material used to make decorative items, such as knife handles, gun grips, and jewelry. It is a unique natural element that is rarely found, so its value is quite high.
Today, mammoth tooth, after certain processing (stabilization), is widely used by master knifemakers. Stabilization is the process of polymerizing the material under vacuum with or without the use of fat-soluble dyes, while the material is impregnated with polymeric substances throughout.
MAMMOTH TOOTH HANDLE MATERIAL
Mammoth tooth is a manufactured material of animal origin. Its exceptional feature is the fact that its source is extinct animals - mammoths. Paleontologists have established 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. The fallen teeth, which modern scientists find during excavations, become the basis for decorative elements, including knife handles.
Due to the long stay in the soil, the material acquired a very unstable structure - the enamel became rock hard, and the dentin, on the contrary, became loose. But modern technologies for stabilizing materials have helped turn mammoth teeth into an excellent basis for creating luxurious knife handles. The polymer composite provides the 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 various products. Outwardly, they resemble elephant teeth, but they have a much different shade. Given the historical value and rarity, mammoth tusk is especially highly valued, since this animal became extinct long before our era. 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, used to create various decorative elements - of course, not in their original form, but in processed form.
The age of the material, according to scientists, is 10-40 thousand years. How mammoths lived has not been fully studied today. However, the remains of these giants found by scientists, their bones, teeth, even whole carcasses have allowed scientists to make serious progress in this field of research. The available data made it possible to find out what the mammals looked like, what they ate, what climatic conditions they lived in, what behavioral characteristics they had (for example, whether they led a herd or solitary existence).
The mammoth ate practically the same as a modern elephant: its diet consisted of plant food. In the world, the animal could feed on coniferous plants. They preferred rough food, which they easily chewed with their strong jaws and teeth, similar to large plates. An interesting feature of the mammoth's body was that as the old tooth wore out, a new one grew, displacing the old one and taking its place. Thus, the animal could change its teeth several times during its life. Absolutely all teeth changed in about a ten-year period, and the average life span of a mammoth was 40 years. In other words, one animal could survive an average of four complete changes of molars. It is because of this feature that people often find individual worn mammoth teeth but do not encounter other traces of it.
Appearance
If you look at a mammoth tooth, you can see a heterogeneous surface with ribbed edges. Bone, enamel and soft tissue in this case alternate. The material has a rather complex structure:
Its basis is dentin.
The dentin layer is covered with 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 various jewelry products. The density of the material is very high and resembles stone. In order to process such a product, the master needs to spend a lot of effort and time.
Raw material stabilization
To prevent the tooth and tusk from collapsing during use and manufacturing of products from it, stabilization technology is used. This is a crucial stage of processing, in which the following technologies are used:
Polycondensation.
Vacuum processing.
Application of special dyes.
All cavities of the tooth are filled with a polymer 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, becomes more attractive and unique.
Before the advent of this technology, mammoth teeth and bones were rarely used for making souvenirs, because they did not have sufficient strength due to the large number of cracks and delaminations inside. In addition, tooth enamel has high hardness, which quickly leads to the unusability of the saw when processed. A stabilized product is much easier to further process. 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 individuality.
Related Products
Delivery and payment
Delivery and payment
Delivery by Nova Poshta
The speed of delivery to any branch of Nova Poshta in Ukraine is fixed by the operator, but usually does not exceed 1-3 calendar days.
In cash
Cash payment upon receipt of goods.
Cash on delivery at Nova Poshta (you must have a passport or driver's license with you).
Visa and MasterCard
Payment of the order to a Privat Bank card.
Delivery of goods is possible only after confirmation of payment.