OAK knife handmade by Pavel Honcharenko studio, order to buy in Ukraine (Steel - N690)
- Brand: Майстерня ножів ручної роботи Павла Гончаренка
- Product Code: ДУБ - студія ножів ручної роботи Павла Гончаренка
| Загальна довжина клинка mm: | 275±05 мм |
| Матеріал леза | Blade made of N690 steel, with TCO (annealing) and cryo-treatment (heat treatment of knife steel using liquid nitrogen) |
| Твердість клинка (метал): | Загартованість - 61 HRC |
| Матеріал руків'я: | Bronze, stabilized mammoth tooth, suvildouba, mosaic foam and tylem tube. Strap made of leather cord 3 mm, bead made of oak |
| Довжина леза | 132±05 мм |
- Availability: Під замовлення
Description
SPECIFICATIONS:
Name of the knife - OAK knife handmade by Pavlo Honcharenko's studio, order to buy in Ukraine (Steel - N690)
Knife type: Fixed blade
Brand: Studio "Handmade knives by Pavlo Honcharenko"
Steel sheet: One-piece cast, through-mounting on screed and resin
Blade sharpening: One-sided, ready-to-use knife.
Downs: Straight
Tapers: 0.1- 0.2 mm
Blade length: 135 mm
Blade width : 33 mm
Blade thickness: 4 mm
Handle length: 140 mm
Handle thickness: 25 mm
Bolster Material: Solid Brass
Handle: Bronze , Stabilized Mammoth Tooth, Suvilda Oak, Mosaic Foam, and Rope Tube. Lanyard made of leather cord 3mm, bead made of oak souvel
Handle color: Dark brown
Handle impregnation: Yes
Handle cover: Yes
Hole for string (for lanyard): Yes
Lanyard: Lanyard made of leather cord 3mm
Scabbard :Wood-carved oak, buckskin calfskin, Italian vegetable-tanned genuine leather, treated with water-repellent finish and impregnated with protective solutions, stitched with waxed thread. Manual embossing of the invoice. Free suspension, removable. An insert from a hybrid
Model: OAK knife handmade by Pavel Honcharenko studio, order to buy in Ukraine (Steel - N690)
Model number: 060
Country of birth: Ukraine
Artisan: Master Pavlo Honcharenko, Ivankiv, Ukraine ( "Pavel Honcharenko's handmade knives" )
Best use: Hunting, carcass cutting, cutting
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.
Features of steel N690
Martensitic alloy steel N690 is produced by the corporation Vohleg-Uddeholm Gmbh & Co. , which has its enterprises in Austria, Germany, South and North America. The second name of the alloy is Austrian cobalt stainless steel. Due to its high quality and operational characteristics and advantages, it is successfully implemented in many countries of the world for the manufacture of knives and other purposes.
Steel is produced by electroslag smelting technology. It has a uniformly distributed carbide structure of the crystal lattice in the absence of harmful impurities. As a result of heat treatment and forging, the impact toughness of the material increases without loss of hardness. The presence of alloying additives in the chemical composition of steel ensures resistance to corrosion.
Field of application
Steel is recognized as a good material for the serial production of long and tactical knives, the technical characteristics of which allow operation in difficult and extreme conditions. Blades made of N690 steel are able to withstand not only longitudinal, but also strong lateral loads when acting on bends and twists.
Due to its resistance to corrosion and aggressive environments, steel is used in the manufacture of diving knives, harpoons for spearfishing and other sports equipment.
This steel is used in the manufacture of knives by such well-known European brands as Vokeg, Spyderco, Vepshmade and Echthema Ratio. The manufactured blades have excellent cutting properties, are strong, durable, sharpen well and hold an edge. The presence of alloying elements in the composition ensured high corrosion resistance while maintaining plasticity. If necessary, there is a possibility of thermal hardening up to 60 NKR.
The technical and physical characteristics of the alloy allow it to be used in mechanical engineering for the manufacture of tools, milling cutters, drills, bearing parts, and critical components operating under high mechanical loads. The steel is highly wear resistant and can be heat treated.
Resistance to the effects of moisture and chemicals allows the use of steel in the food and pharmaceutical industry for the manufacture of cutting tools and grinders. At the same time, the ecological purity of the material and the complete absence of impurities are taken into account.
ANALOGUES
According to its composition, steel N690 is a close analogue of Russian steel 95X18, German X102SgMo17, Japanese / (3-10 and A115-10, French 2100СО17, American 440 С. In Sweden, an analogue of Sandvic 12С27 is produced.
STORAGE
Steel N690 contains:
■ 1.08% carbon (C), which gives the material hardness and increases strength;
■ 17.3% chromium (Cg) to obtain anti-corrosion properties, increase wear resistance and change hardening conditions;
■ 1.1% molybdenum (Mo) to reduce brittleness, increase plasticity and resistance to high temperatures;
■ 0.1% vanadium (V) to increase metal elasticity and inertness to the action of aggressive environments;
■ 1.5% cobalt (Co) increases heat resistance and improves mechanical properties;
■ 0.4% manganese (Mp) increases hardness;
■ 0.4% silicon (5|) to improve alloy stability and increase wear resistance.
The presence of cobalt in the chemical composition of the metal makes the crystal structure of N690 more uniform and resistant to mechanical loads.
PROS AND CONS OF N690 STEEL FOR KNIVES
The use of Austrian N690 steel allows the production of high-quality stainless knives for various purposes. Due to its physical and technical properties, the material is well processed, capable of heat treatment, is not subject to corrosion and is sold at an affordable price.
5*ee1 N690 is one of the best alloys for making beautiful wear-resistant blades. Simple sharpening and long-term preservation of the sharpness of the edge make use simple and convenient. You will never regret buying or making a knife from this steel.
Types of deliveries
The high quality of Wohler N690 steel is ensured by the use of a unique rolling technology developed by the manufacturer. Metal sheets are subjected to repeated hot processing with rolling in the longitudinal and transverse directions. After that, the material is cold cut into strips.
N690 steel is supplied to the rolled metal market in the form of steel strips with a thickness of 3-5 mm, a width of 20-50 mm and a length of 250 to 1000 mm, especially for the manufacture of knives. The cross-section of the strips is rectangular or with a prepared longitudinal bevel, which eliminates the need for blacksmithing when making the blade. The steel may or may not have previous heat treatment.
All of this is very convenient, as it does not require operations to cut large sheets, allows you to accurately determine the amount of required material and reduces the amount of waste.
Strips are sold individually. The price depends on the geometric dimensions of the product, thickness and types of preliminary factory processing. For the products of the metalworking industry, the supply of a sheet with a thickness of 2-8 mm of the size declared in the contract is carried out. If necessary, you can order any analogue of steels of type N690. Sheet metal is sold by weight.
Physical description
Quercus species are characterized by alternate, simple, deciduous or evergreen leaves with lobed, toothed or entire margins. Male flowers are contained in yellow panicles that appear with or after the leaves. Female flowers are found on the same tree , singly or in two- or multi-flowered spikelets; each flower has a husk of overlapping scales that enlarges to hold the fruit or acorn, which ripens in one or two seasons. White oaks have smooth leaves without bristles on the tips, sometimes with glandular margins. Their acorns ripen in one season, have sweet-tasting seeds, and germinate within days of falling. Red and black oaks have bristly leaves, hairy acorns, and bitter fruits that ripen at the end of the second growing season .
Oaks can be easily propagated from acorns and grow well in moderately moist rich soil or dry sandy soil. Many grow again from stump sprouts. They are hardy and long-lived, but not shade-tolerant and can be damaged by leaf-gnawing organisms or oak wilt fungus.
Main types and uses
The taxonomy of the genus Quercus is confusing due to 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 US Midwest . Many oaks originating from the Mediterranean have economic value: the galls formed on the branches of the Aleppo oak ( Q. infectoria ) are the source of Aleppo tannin , which is used in the production of ink; commodity corkcork oak ( Q. suber ) is obtained from the bark , and the tannin-rich kermes oak ( Q. coccifera ) is the host of the kermes insect , which was once harvested for the dye contained in its body fluids .
Two East Asian oaks are also of economic importance: the Mongolian oak ( Q. mongolica ) provides useful wood, and the Chinese cork oak ( Q. variabilis ) is a source of black dye and is also a popular ornamental plant . Other cultivated ornamental plants are Armenian or Pontic oak ( Q. pontica ), chestnut oak (Q. castaneaefolia ) , golden oak ( Q. alnifolia ), holm oak, orpad oak, oak ( Q. ilex ), Italian oak (Q. frainetto ) , Lebanese oak ( Q. libani ) , Macedonian oak ( Q. trojana ), and Portuguese oak ( Q. lusitanica ). Popular Asian ornamental plants include blue Japanese oak (Q. glauca ) , daime oak (Q. dentata ) , evergreen Japanese oak ( Q. acuta ), and pinna oak ( Q. acutissima ). The English oak ( Q. robur ), a tree native to Eurasia and North Africa, is cultivated in other regions of the world as an ornamental.
In early October, BBC4 aired a 90-minute documentary showing all aspects of the life of an ancient English oak throughout the year. The Oak: Nature's Best Survivor focuses on a single tree in Witham Woods , near Oxford, a site purchased by the University of Oxford in 1942 for forestry research. The film, presented by zoologist, entomologist and TV presenter George McGavin , begins with a high-tech assessment of the condition of the tree. By firing laser pulses, foresters create a three-dimensional virtual image of the oak so they can track its size and shape over a 12-month period.
At the beginning of late August, it is 19 meters high 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 grow shorter and temperatures drop, the nearly 400-year-old oak is forced to undergo 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, trees begin to break down pigments and nutrients in the leaves to store them for the winter ," he says, creating spectacular autumn colors .
After extracting nutrients, the leaves drop. But leaf fall is not caused by cold weather. In fact, the oak can perceive red light in the spectrum with the help of a chemical pigment ( phytochrome system ) in the cells of the leaves, which allows it to measure the hours of daylight. In October, when the oak is releasing its acorns, there are six hours less sunlight each day than at the height of summer.
Winter is the "most dangerous time of the year" for an oak tree - a bare tree has to stay alive in severe cold, spending almost no energy. The bark acts as a blanket, but if the liquid inside the oak freezes, the tree will suffer catastrophic damage. Thus, he removes fluid from the cells, dehydrating himself. The liquid that remains has a high concentration of sugar -- " a kind of antifreeze ," according to McGavin.
The most nutrients are stored in the roots of the oak 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 filaments" to survive, including mycorrhizal fungi to extract phosphate from the surrounding soil.
Spring brings an "epic growth spurt," and by the end of April, male flowers appear. Filled with pollen grains, they are dispersed by the wind to fertilize the female flowers and create acorns that will continue the oak tree's life cycle. A month later, the oak has completely blossomed and is inhabited by insects. Among them is the larva of the winter sawfly , which eats 27,000 times its weight in a young oak leaf. Oak can recognize chemicals in the creature's saliva and defends itself by producing phenolics and tannins to inhibit the larva's growth. Meanwhile, gall waspslay their eggs in female flowers, causing galls to grow in place of acorns. This is where the wasp larva develops. There are hundreds of species of these wasps, each of which has its own unique gall structure. One of these galls – a sphere made by the wasp Andricus collari – forms an indelible ink when ground up and mixed with water, sulphate of iron and gum arabic. Gall ink was used in historical documents for 1400 years until the 19th century.
Oak was also an important building material in the past. 13th-century masons used 2,641 tons of oak to build Salisbury Cathedral, which was felled in the spring of 1222. 
Wood came from Ireland as well as England, although English oak with its wide bands of early wood was preferred over Irish wood with denser rings. its lightness and strength. And in the 18th and 19th centuries in Britain, oaks began to be planted frantically to supply wood for warships. It took 6,000 oaks to make HMS Victory - "a product of medieval acorns scattered all over Britain ". Curved oak branches were especially useful for creating shaped bodies.
By August of the second year, the 3-D image shows that the oak has produced 230 kg of new wood in 12 months, produced from the carbon dioxide (and water) absorbed during photosynthesis. It also released 234,000 liters of oxygen into the atmosphere from leaf stomata.
Other results of the documentary film:
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how oak trees react to gale force winds. At a Forestry Commission research site outside Edinburgh, scientists fit an oak with sensors and then turn it over until it is uprooted. Their instruments show that it begins to fall when it is only six degrees from vertical, but it would take a force 10 storm to have the same effect.
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how much water an oak tree pumps out of the ground in the spring. Probes attached to a sap flow monitor measure this at 70 kg per hour at peak, passing to the leaves through the xylem vessels. The cambium produces new cells that differentiate to form xylem and phloem tissue.
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When oaks took root 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 submitted by a user
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Geoff Segal, joiner with interests in tree identification, cultivation, history and conservation - appeared first on Timberyard.co.uk with various images - see here
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