SPECIFICATIONS:

The name of the knife:  SEA FOAM knife handmade by master Fomenko Knifes, order to buy in Ukraine, steel CPM® REX 121, 66 HRC
Knife type: Fixed blade
Brand: Studio of exclusive handmade knives ANDROSHCHUK KNIVES 

Model: SEA FOAM knife handmade by master Fomenko Knifes, order to buy in Ukraine, steel CPM® REX 121, 66 HRC
Model number: 076
Country of birth: Ukraine
Craftsman: Master Oleksandr Fomenko (Fomenko Knifes), Chuhuyiv, Ukraine Studio of exclusive handmade knives FOMENKO KNIFES
Best use: Multi-purpose: hunting, fishing, cutting, slicing, 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 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.

CPM Rex 121. Powdered steel Crucible CPM® Rex® 121®
CPM® REX® 121 (Crucible Industries LLC) is a high vanadium and cobalt tool steel designed to achieve the high wear resistance, hardness and redness found in high speed steels. Its excellent red hardness (red hardness is a characteristic of the heat resistance of steel, indicating the ability of steel to maintain high hardness and wear resistance obtained as a result of heat treatment when heated to red heat temperatures) provides a higher cutting speed compared to other quick cutters. Excellent wear resistance (due to high vanadium content) helps maintain edge sharpness at higher cutting speeds.

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.

CPM REX 121 bridges the gap between high alloy tool steels and carbide materials (tungsten carbide, which is second only to diamond in hardness). Can be used in cutting tools where high cutting speeds require higher heat resistance but carbide tools are too brittle, or in high wear resistant tools (dies) where carbide tools are also too brittle.

CPM Rex 121 was developed in 1998. In terms of hardness, this is truly a champion, able to reach a hardness of 70-72 HRC. For information, officially the Rockwell C scale has a maximum value of 70 HRC.

Also extremely high wear resistance. Difficult to grind and therefore difficult to sharpen. Sharpening this grade can be a nightmare even at 68HRC and will be exponentially harder at higher hardness. With so many alloying elements, there are many carbides in steel, and some of them are not very small. The steel works best with a rough cut (the photo below shows a comparison of the microstructures of popular steel grades and the microstructure of CPM Rex 121).

There are many hard steels in the world, but according to renowned knifemaker Gary Creely, the REX 121 takes them to the next level. “The steel has a low Rockwell hardness of 40 even after annealing, and after heat treatment it is close to 70 HRC.” The steel is described as a response from Crucible's rival Carpenter CTS steel - Maxamet Micro-Melt Alloy. Although they are very similar in chemical composition, REX 121 contains 1% more carbon and 3% more vanadium. The practical result of this hardness value is unprecedented sharpness retention. REX 121 knives will far outperform even other high quality steels such as M4 and S35VN.

Steel does not have high impact resistance and can break under abuse, but Creely believes excellent edge retention is more beneficial than the high strength in the small knives we carry every day. “Such steel is best suited for smaller knives. If the REX 121 finds its way to a larger blade, the chances of it being misused will skyrocket."

The disadvantage of REX 121 is that it is so hard that it can damage conventional abrasives. “In short, you need to use diamond abrasives to sharpen this kind of steel,” notes Creeley. "If you choose your favorite Japanese water stone, there's a good chance that steel will cut your water stone harder than the stone will sharpen steel."

The composition of a hundred:

• the carbon content in the alloy is 3.4%. Carbon is the most important element in steel, it increases its strength and gives the metal good hardness.
• Cr 4.0% - the chromium content in the alloy is 4.0%. 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 5.0% - the content of molybdenum in the alloy is 5.0%. 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 9.5% - the content of vanadium in the alloy is 9.5%. 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.
• W 10.0% C The tungsten content of the alloy is 10.0%. Tungsten is a light gray metal. The most refractory metal, has a melting point tmelt = 3380 °C. It is used to create alloys with high strength. Tungsten is used as one of the main components or alloying element in the production of high speed steels.
• Co 9.0% - the cobalt content in the alloy is 9.0%. Cobalt is a silvery-white, slightly yellowish metal with a pinkish or bluish tint. Increases heat resistance, improves mechanical properties. From alloys using cobalt, a processing tool is created: drills, cutters, etc. etc.
• S 0.03 - 0.12% - sulfur content in the alloy - 0.03 - 0.12%. Sulfur, like phosphorus, refers to harmful technological impurities in steels and alloys. An increase in the sulfur content significantly reduces the mechanical and physicochemical properties of steels, in particular, ductility, impact strength, abrasion resistance and corrosion resistance. The limits of sulfur content as a process impurity are 0.035...0.06%. Due to the extremely fine and uniform microstructure of CPM (Crucible Particle Metallurgy's proprietary powder metallurgy process), sulfur can be added if desired to improve machinability. The higher sulfur content benefits the tool maker by making it easier to manufacture and the tool user by making it easier to resharpen. The CPM process ensures that additional sulfur does not adversely affect tool strength.

Well, you can buy a knife made of Knife steel CPM-S90V. Composition and properties. on our website knife.net.ua or by contacting us by phone +380961711010

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.

Ironwood - iron wood - handmade knives

In nature, ironwood is extremely rare, therefore it occupies an honorable place in the Red Book. However, in terms of its properties, each iron tree is not inferior to the density of cast iron. Its bark can withstand gunfire, but it sinks hopelessly in water. It is worth noting that this is not a separate class of trees, but a whole group assembled from different species. It includes several dozen species of plants with unusually dense wood. They can be found on every continent. Moreover, raw materials are used both in the industrial industry and in medical practice.

What is special about these trees?

With the naked eye, it is quite difficult to recognize the "stone" breed of a perennial plant. Especially if they are on the verge of extinction. However, they are characterized by the following features:

• the age of such long-lived people is not less than 2 hundred years;
• wood fiber is resistant to corrosion processes and does not deteriorate under the influence of strong acids;
• the bark contains many tannins that protect their "hosts" from all kinds of parasites, as well as from the rot fungus;
• the log will definitely go under water, since the density of wood is 1 t / m³, taking into account the humidity of 12%, for this reason, such breeds grow quite slowly;
• the height of each exceeds 25 meters, and the girth of the trunk reaches more than 200 cm.

All these properties are necessary for an iron tree to survive in the harshest climatic conditions. Sharp temperature changes in Russia, African drought or humid European climate will not be able to harm this natural phenomenon. Such varieties of trees perfectly adapt to any adverse environment. For this, they are equipped with a considerable number of devices, starting from the unique structure of the trunk / roots and ending with the chemical composition of the bark. In this regard, they are widely used in production:

• furniture;
• building structures;
• cars;
• cosmetics;
• decorative elements;
• underwater equipment.

High-quality and original steel inserts are a wonderful decoration of exclusive and unique knives of the studio of exclusive  handmade knives FOMENKO KNIFES  (Ukraine), which offers to order and buy in the online store https://knife.net.ua or by phone. . +380674072030