Used in the same way as other half round knives, this leather specific half round knife is used in the leather industry, especially in Europe and America. The use and sharpening of leather-specific half-round cutter:
Question 2: do the knife that material is good to do what to do with the knife
Did you say it is for machining?
In modern machining, cutting tool materials to carbide and high-speed steel used most, almost half each. The invention and application of high-speed steel, there has been a whole century of history, carbide has been half a century. However, both have developed many new varieties, its performance continues to improve, playing an important role in machining. In recent years, with the rapid development of CNC machining technology and the general use of CNC machine tools, to achieve high efficiency, high stability, long life processing. The application of superhard cutting tools has also become increasingly popular, while introducing many advanced cutting concepts, such as high-speed cutting, hard state machining, high stability machining, turning instead of grinding, and dry cutting. Superhard tools have become an important and indispensable means of modern cutting.
(a) Superhard tools
Superhard tools mainly include diamond tools and cubic boron nitride tools, which are dominated by synthetic diamond composite (PCD) tools and cubic boron nitride composite (PCBN) tools PCD metal cutting tools PCD metal cutting tools can be realized by using the high hardness of the PCD material, high wear resistance, high thermal conductivity and low friction coefficient. Non-ferrous metals and wear-resistant non-metallic materials of high precision, high efficiency, high stability and high surface finish processing. Such tools from the structure can be divided into welded PCD tools and indexable PCD inserts. In recent years the development of welded PCD tools in the faster varieties of PCD tools with standard shanks, such as PCD milling cutter with shanks, PCD boring cutter, PCD reamer, etc., the shank type is mainly for the cylindrical shanks, tapered shanks and HSK shanks. This tool (especially multi-tooth tool) is characterized by the cutting edge of the shank of the small jump (such as the edge length of 30mm HSK shank PCD milling cutter cutting edge jump is only 0.002mm), especially suitable for a variety of non-ferrous metal parts of the formation of the surface, holes, step holes for large quantities of high-speed machining. For example, the use of aluminum substrate disc PCD high-speed milling cutter (six edges, diameter 100mm), the most storage speed up to 20,000r/min, more than, cutting speed up to 7,000m/min. Indexable PCD inserts are in the carbide indexable inserts mounted on a piece of PCD cutter blanks and then sharpened and become, can be clamped in a variety of CNC machine tools, tool bar, toolholder or tool plate, for the Highly reliable high-volume machining. With the increasing popularity of CNC machine tools, machining centers and automatic production lines, the use of indexable PCD inserts more and more, and its tool durability can be increased by dozens of times compared with carbide cutting tools.PCBN metal cutting tools PCBN metal cutting tools can be divided into two categories of welded PCBN tools and indexable PCBN inserts. Welded PCBN tools are PCBN cutter blanks welded to the steel substrate by sharpening and become, mainly lathe, boring tool, reamer, etc. PCBN tools are mostly used for wear-resistant ferrous metal processing, so the tip angle can not be too small, the tool is generally -5 ° ~ 5 °, the back angle is generally 3 ° ~ 10 °, the intermittent cutting is generally used in negative chamfering. Indexed structure of PCBN inserts (mainly for turning inserts and milling cutter blades) is generally in a corner of the indexable carbide inserts welded a PCBN cutter blank, sharpened and become. Taking into account the more expensive blade blanks and resharpening and other reasons, generally only made into a tip. With the improvement of the quality of the welding process, its shear strength of up to 0.78kg/m2. With the PCBN cutter blank size more and more small, do not resharpen the price of PCBN inserts have also been reduced.
Problem three: cutting 304 stainless steel blades to choose what material of steel to do The gap is the heat treatment is not mastered, not a material problem, if the slow speed shear, CR12MOV is fully applicable, high-speed shear, such as rolling shear, we all use LD, of course, 6542 is more desirable, however, the heat treatment is not in place, you use the M42 is also a waste of material.
Question 4: What materials are used to make general blades? Steel is an alloy of iron, carbon and small amounts of other elements. Stainless steel or corrosion-resistant alloy steel with 10.5% or more chromium-gold content is the generic term for this type of metal. It should be remembered that stainless steel does not mean that this type of steel will not rust or corrode, but simply that it is much more resistant to corrosion than alloys that do not contain chromium. In addition to chromium, other metallic elements such as nickel, molybdenum, vanadium, etc. can be added to alloys to modify the properties of the alloyed steel to produce different grades of stainless steel with different properties. Depending on the purpose and location of the application, careful selection of tools made from the stainless steel with the most appropriate properties can be critical to the efficiency and success of your particular job. ！！！！！
Common Edge Materials for Today's Cutting Tools
AUS-8
ATS-34
GIN-1
CPM-T440V
SANMAIIII (Triple Layer Steel)
420J
CARBON V
440C
< p> D2AUS-8:
A high carbon, low chrome stainless steel that has proven over time to have an excellent compromise between being hard and tough, and being resistant to rust while remaining sharp for a long time.
ATS-34:
Japanese steel, produced by Hitachi Steel. ATS-34 is also a high carbon steel with a hardness of 59-61 HRC, and is considered by some to be one of the best blade steels available. In addition, the US 154CM steel is equivalent to ATS-34.
GIN-1:
Formerly known as G2, it is a low-cost steel that is slightly softer than AUS-8.
CPM-T440V:
Recently considered a superb knife-making steel, it is more durable than all stainless steels on the market today, and does not require sharpening for long periods of time.
SAN MAI III:
An expensive Japanese laminated steel. A hard inner layer with high carbon content serves as the center layer of the blade, and tough elastic steel is tempered on both sides, resulting in a blade that combines the characteristics of good steels with excellent quality. It is 25% tougher than AUS-8.
420J:
It is a low carbon steel, tough (not even easy to break), impact resistant, corrosion resistant, can stay moderately sharp, and easy to care for, and is used in a number of ornamental swords.
CARBON V:
A pure carbon alloy steel, cold steel company in its purchase of a large number of high-grade carbon steel to add a small amount of alloying elements to increase the toughness and durability of this steel, and then in accordance with the strict rules of rolling to obtain the best crystallization, so that the blade can take full advantage of the direction of crystalline grains in the steel, so that the blade becomes outstanding.
440C:
It is also a high quality stainless steel currently used in the high grade bulk knife market, with strength and sharpness even more than ATS.
D2:
Recently, the KA-BAR factory has adopted the D2 type of steel, which is a high quality tool steel, with a hardness of 59-60 HRC, deep cold treated to -120 degrees, and twice annealed, and has the advantage of being tough and longer lasting. The advantages are toughness and longer edge retention.
Knife steel
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First, it's important to remember that a knife's performance is not determined by the steel alone, but also by the shape of the blade (for example, Tanto's tips are not suitable for skinning), and perhaps most importantly, by the shape of the blade. skinning), and perhaps most importantly, heat treatment. Lesser steel with good heat treatment may also produce a better blade. Poorer or very poor heat treatment may cause stainless steel to lose some of its inherent properties, or cause hard steel to become brittle. Most unfortunate of all: of the three most important characteristics of a knife (blade shape, steel type, and heat treatment) heat treatment is impossible to recognize by eye, so the average person puts an inordinate amount of attention on the first two. Keeping this in mind, 440A is often ridiculed, but I'd rather have a dive knife made of 440A than L6. A properly heat treated 5160 is very strong, but if I want a skinning knife, I'd be more interested in one that holds its blade better, like an ALA 521000 and so on.
I. Steel alloys
Simply put: steel is an alloy of iron and carbon. Other components are used to make a difference in steel properties. Below is an alphabetical list of important steels, which contain the following components:
Carbon
Present in all steels, it is the most important hardening element. Helps to increase the strength of the steel and we usually expect tool grade steel to have more than 5% carbon, which also becomes high carbon steel.
Chromium
Increases wear resistance ...... >>
Question 5: What's the best material for knives 420J2: (Cold Stee) Due to its low carbon and high chromium composition, this steel is a great choice for tough, shock-resistant blades, with good corrosion resistance and good edge retention. It is an ideal blade material for use in a variety of environments such as high temperatures. Humidity. The high amount of chromium gives it excellent corrosion resistance and makes it a good material for making carry knives and knives that don't require much maintenance.
4Cr13: domestic high quality stainless and acid-resistant steel, low carbon and high chromium steel, widely used in weak corrosive media parts. Medical tool spring. Rolling bearings. Surgical tools. Surgical instruments, excellent corrosion resistance, excellent machinability, comprehensive performance equivalent to 420J2.
425m: 420 series of steel of the modified (Modified) varieties, named 425M, will increase the carbon content to about 0.55%, and add 1% of molybdenum, heat treatment can be violated by a more ideal hardness (HRc58), but retained the 420 series of steel of the good The machinability of 420 series steel is retained, so it is very suitable for use in factory-made cutting tools. The United States Ming's BUCK and GERBER two big knife factory has in the 90's choose 425M as its blade material.
9Cr18: domestic high-quality stainless and acid-resistant steel, chromium content of 18%, carbon content of 0.9%, widely used in automatic lathe parts. Fiber factory machine tools. Corrosion-resistant and wear-resistant parts for petroleum industry. Surgical tools. Surgical instruments, excellent corrosion resistance, excellent processability. The hardness of HRc58 can be achieved after the maturation process.
440-C: American-made high-quality stainless steel, chromium content of up to 16-18%. Originally used in surgical knives and the marine industry, corrosion resistance and resistance to excellent; strong toughness. Now more widely used in handmade knives and high quality factory-made knives. Carbon content is about 1% (440 series are divided into A, B, C, and F grade; C grade and F grade have the highest carbon content, while A grade has less amputation). After maturing, it can reach the hardness of HRc58.
9Cr18Mo: domestic high quality stainless steel, chromium content of 18%, containing 1% molybdenum, carbon content of 0.9%, mainly used in weak corrosive media parts. Medical tools spring. Rolling bearings. Surgical tools. Surgical instruments, excellent corrosion resistance, excellent processability, after maturation treatment up to HRc58 hardness.
154CM: American made high quality stainless steel, chromium content up to 15%, molybdenum content up to 15%, molybdenum content up to 4%; so it is named 154CM. It is the modern generation of handmade knives of the master R.W. Loverless pioneered the use. It has excellent machinability, corrosion resistance, blade wear resistance and toughness, but is sold at a higher price, so it is only used for handmade knives. The carbon content is about 1.05%, and the hardness can reach HRc60~61 after heat treatment.
ATS-34: Japan's "Hitachi Metals Industry" for the U.S. 154CM and the development of high-quality stainless steel, materials and ingredients and 154CM is similar, but the performance of all aspects of the 154CM standard, and even better, but the price is cheaper, was recognized as one of the best cutting tool steel, has become a handmade and high-quality factory-made cutting tools. It is recognized as one of the best cutting tool steel in the industry and has become the mainstream of handmade and high quality factory-made cutting tools. After heat treatment, it can reach HRc60~61 hardness.
AUS8(8A): Japan "Aichi Steel" developed by the quality of stainless steel, corrosion resistance, blade damage resistance and toughness are excellent levels, mostly used in Japan-made quality cutting tools. AUS steel grade is divided into 10A (carbon content of about 1%), 8A (content of 0.8%) and 6A (carbon content of about 0.6%) three kinds. 8A heat-treated after the HRT, the steel will be used for the cutting tools, and then the steel will be used for the cutting tools. 8A is heat-treated to HRc58~59 hardness.
D2: metal machining wear-resistant tool steel D2, belongs to the air-hardening steel (Air-Hardening steel); is widely used in felling knife or hunting knife sub-production, carbon content of up to 1.5%, chromium content is also as high as 11.5%, heat-treated up to the hardness of HRc60, but the relative Ting exhibition (toughness) is weaker, the ability to withstand is not good, the steel surface is also difficult to make a mirror finish. The surface of the steel is also difficult to make mirror polishing treatment.
Hi-Speed Tool Steel (high-speed tool steel): highly processed into the tool steel, high carbon content, and chromium content is low (about 4%), so the surface of the polished steel luster is darker, heat-treated up to the high hardness of HRc62, but the resistance is not good.
Cowry X(RT-6):...... >>
Question 6: What stainless steel material is better for cutting tools You can use martensitic stainless steel to make cutting tools, martensitic stainless steel, can be quenched to improve the hardness. Martensitic stainless steel materials are: 410, 420, 420J1, 420J2, 440 and so on.
Question 7: DIY do knife with what steel material Use steel that can be quenched will be fine. You can use 45-gauge steel, first punch holes, make a good handle (do not install the wooden handle first) and then grinding, and then quenching. After quenching then use a fine grinding wheel for fine sanding.
Question 8: What is the material made of the knife Plastic is also divided into a variety of now typical when the PVC with the addition of silica soil adjustment of softness and hardness, processed into small particles, added to the hot injection molding chicken extrusion molding
Question 9: What material do you use to make blades and hard and wear-resistant high-speed steel, this material is good abrasion resistance, and high strength, but the price is more expensive
Question 10: industrial surgical blades. What material is used for industrial surgical blades? Titanium alloy material, so that has the advantages of not rusting, high surface hardness.