Tungsten carbide is a material used for a number of industrial applications and it is characterised by its high strength, toughness and hardness. Its name derives from the Swedish for tung (heavy) and sten (stone) and it is mainly used in the form of cemented tungsten carbides. Cemented carbides (also known as hardmetals) are made by 'cementing' grains of tungsten carbide into a binder matrix of cobalt or/and nickel.
Tungsten carbide as a material can vary in carbide grain size (0.2 – 50 microns) and by binder contents (up to 30%), as well as by the addition of other carbides. By varying the grain size of the tungsten carbide and the binder content in the matrix, engineers have access to a class of materials whose properties can be tailored to a variety of engineering applications. This includes high-tech tools, wear parts and tools for the construction, mining and oil and gas sector.
Tungsten carbide products typically have a high resistance to wear and can be used at high temperatures, allowing tungsten carbide's combined hardness and toughness to significantly outperform its steel product equivalents.
Element Six tungsten carbide products
Our Hard Materials Division has been manufacturing tungsten carbide for over 60 years. We develop, produce and sell hardmetals and special tools for industries ranging from construction, mining and tunnelling, to oil and gas, textiles, automotive and agriculture. Our comprehensive unrivalled quality assurance programme ensures that all our inserts are certified to ISO 9001:2008 quality standards. For more information, please see our brochures.
As a company, we are focused on building business partnerships as our greatest strength is in developing customised solutions that create long-term advantages for our partners.
2013年8月22日星期四
Tungsten Carbide Ball
Cemented Tungsten Carbide is an incredible material. It was originally developed for use as a cutting tool, in machine tools applications, where it still finds wide use today.
It is extremely hard at 91 HRA which is equivalent to 1500 Vickers 30. This material is very wear resistant, with some abrasion tests showing it at 30 times hard steel. It has good long-term dimensional stability, which makes a good material for gage applications.
Cemented Tungsten Carbide is extremely stiff, with a Young's modulus of elasticity of 98,000,000 pounds per square inch, compared with steel at 30,000,000 PSI. This high stiffness makes cemented tungsten carbide balls a good choice for ball-sizing and they provide premier results as components of kinematic couplings.
Its good performance at temperatures up to 800 degree Fahrenheit ( 427 centigrade ) make it a good choice in high temperature applications.
It has good corrosive resistance in many environments.
The material has a very low rate of thermal expansion, at 2 microinches per inch per degree Fahrenheit (4.9 X 10-4 per degree C). Steel is 6.4 and aluminum is 12 microinches per inch per degree Fahrenheit.
One of the very important features of this material is that it is electrically conductive, with a resistivity of two micro ohms per centimeter. This conductivity sets it apart from other hard stiff materials, such as ceramics and sapphire, because it allows it to be machined into complex forms by the Electrical Discharge Machining (EDM) process. Cemented Tungsten Carbide can be ground and lapped using diamond grit. The material is slightly magnetic. Small diameter balls can be picked up with a magnet. Cemented Tungsten Carbide is very heavy, with a density of .54 pounds per cubic inch or 15 grams per cubic centimeter.
Cemented Tungsten Carbide is neither a metal nor is it a ceramic. It is a cermetal although this isn't a widely used term. This is a combination of a large percentage of Tungsten Carbide ceramic particles bonded together by a small percentage of a metallic binder, to form a solid mass.
It is extremely hard at 91 HRA which is equivalent to 1500 Vickers 30. This material is very wear resistant, with some abrasion tests showing it at 30 times hard steel. It has good long-term dimensional stability, which makes a good material for gage applications.
Cemented Tungsten Carbide is extremely stiff, with a Young's modulus of elasticity of 98,000,000 pounds per square inch, compared with steel at 30,000,000 PSI. This high stiffness makes cemented tungsten carbide balls a good choice for ball-sizing and they provide premier results as components of kinematic couplings.
Its good performance at temperatures up to 800 degree Fahrenheit ( 427 centigrade ) make it a good choice in high temperature applications.
It has good corrosive resistance in many environments.
The material has a very low rate of thermal expansion, at 2 microinches per inch per degree Fahrenheit (4.9 X 10-4 per degree C). Steel is 6.4 and aluminum is 12 microinches per inch per degree Fahrenheit.
One of the very important features of this material is that it is electrically conductive, with a resistivity of two micro ohms per centimeter. This conductivity sets it apart from other hard stiff materials, such as ceramics and sapphire, because it allows it to be machined into complex forms by the Electrical Discharge Machining (EDM) process. Cemented Tungsten Carbide can be ground and lapped using diamond grit. The material is slightly magnetic. Small diameter balls can be picked up with a magnet. Cemented Tungsten Carbide is very heavy, with a density of .54 pounds per cubic inch or 15 grams per cubic centimeter.
Cemented Tungsten Carbide is neither a metal nor is it a ceramic. It is a cermetal although this isn't a widely used term. This is a combination of a large percentage of Tungsten Carbide ceramic particles bonded together by a small percentage of a metallic binder, to form a solid mass.
Tungsten Carbide Coatings
Here at ASB Industries, the most frequently applied wear resistant coating is tungsten. Using our different HVOF systems allows consistent production by choosing powdered feedstock best for your application. Our spray rooms are designed to handle different components, utilizing large turning capabilities with equipment from robots and X-Y gun manipulators to overhead cranes; and specialty-built fixtures for handling repetitive production and complex masking fixtures to protect uncoated areas.
In the continuous-combustion high-velocity oxyfuel HVOF thermal spray process, a fuel gas and oxygen are combusted in a high-pressure chamber, reaching temperatures of 4500 to 5600°F. The hot, high-pressure gas is ejected through a small-diameter nozzle and accelerated down a long barrel at supersonic speeds. Powder, such as Tungsten Carbide is also injected into the nozzle, where the particles mix with the speeding gases and reach velocities of 2500 ft/s to more than 3000 ft/s.
The high speeds impart tremendous amounts of kinetic energy to the particles. Remember that kinetic energy equals half the mass of the particle times the square of its velocity (KE= 1/2 mv2). When these highly energetic particles strike the substrate, the velocity goes to zero and the kinetic energy is absorbed by the particle, causing it to melt in a millisecond. Subsequent particles arrive almost simultaneously, rapidly building up the coating. The result is a very dense adhesive/cohesive coating. It has comparatively very high bond strength, low residual stress, low porosity (typically less than 0.5%), and high wear resistance.
Here at ASB Industries, the most frequently applied powder is tungsten carbide with a cobalt binder. Tungsten carbide melts at 5200°F, and is extremely hard, with Vickers hardness number 2242. On the other hand, cobalt has a melting point of 2460°F, and Vickers hardness number is 1043. Coating properties such as hardness, wear resistance, and strength depend primarily on the grain size and volume fraction of the tungsten carbide particles. Therefore, WC-Co coatings can be designed to provide the specific properties needed for an application by controlling the grain size of the tungsten carbide particles and their volume relative to cobalt. In general, cobalt content ranges from 5 to 30 wt%, and WC grain sizes range from one to eight microns, although for some applications grain size may reach 30 microns.
ASB Industries’ on-site and in-house capabilities in paper mills allow a long lasting carbide grip surface applied to roll surfaces for different processing stages during paper production. ASB will adapt carbide spraying parameters using our flame spray equipment to work best with the paper quality and thickness.
Erosion, abrasion and corrosion are considerations for choosing different chemistries and binder materials. Tungsten Carbide is typically used for extreme wear conditions in almost every industry.
In steel and metals production, tungsten carbide coatings, along with tungsten weld coatings, are widely used from ore production through finished product. A multitude of accepted applications show dramatic maintenance cost reductions and improved production quality.
In power generation where coal is the fuel source, components are required to be protected from extreme abrasion under demanding production seasonal schedules. ASB Industries has a wide variety of solutions incorporated in many critical components.
If your application requires a specific finish, then ASB Industries in most cases will be able to complete your carbide coated surface to varying surfaces finishes or Ra. From large to small components, ASB Industries will most likely be able to finish your project with our diamond grinding and diamond super finishing equipment.
In the continuous-combustion high-velocity oxyfuel HVOF thermal spray process, a fuel gas and oxygen are combusted in a high-pressure chamber, reaching temperatures of 4500 to 5600°F. The hot, high-pressure gas is ejected through a small-diameter nozzle and accelerated down a long barrel at supersonic speeds. Powder, such as Tungsten Carbide is also injected into the nozzle, where the particles mix with the speeding gases and reach velocities of 2500 ft/s to more than 3000 ft/s.
The high speeds impart tremendous amounts of kinetic energy to the particles. Remember that kinetic energy equals half the mass of the particle times the square of its velocity (KE= 1/2 mv2). When these highly energetic particles strike the substrate, the velocity goes to zero and the kinetic energy is absorbed by the particle, causing it to melt in a millisecond. Subsequent particles arrive almost simultaneously, rapidly building up the coating. The result is a very dense adhesive/cohesive coating. It has comparatively very high bond strength, low residual stress, low porosity (typically less than 0.5%), and high wear resistance.
Here at ASB Industries, the most frequently applied powder is tungsten carbide with a cobalt binder. Tungsten carbide melts at 5200°F, and is extremely hard, with Vickers hardness number 2242. On the other hand, cobalt has a melting point of 2460°F, and Vickers hardness number is 1043. Coating properties such as hardness, wear resistance, and strength depend primarily on the grain size and volume fraction of the tungsten carbide particles. Therefore, WC-Co coatings can be designed to provide the specific properties needed for an application by controlling the grain size of the tungsten carbide particles and their volume relative to cobalt. In general, cobalt content ranges from 5 to 30 wt%, and WC grain sizes range from one to eight microns, although for some applications grain size may reach 30 microns.
ASB Industries’ on-site and in-house capabilities in paper mills allow a long lasting carbide grip surface applied to roll surfaces for different processing stages during paper production. ASB will adapt carbide spraying parameters using our flame spray equipment to work best with the paper quality and thickness.
Erosion, abrasion and corrosion are considerations for choosing different chemistries and binder materials. Tungsten Carbide is typically used for extreme wear conditions in almost every industry.
In steel and metals production, tungsten carbide coatings, along with tungsten weld coatings, are widely used from ore production through finished product. A multitude of accepted applications show dramatic maintenance cost reductions and improved production quality.
In power generation where coal is the fuel source, components are required to be protected from extreme abrasion under demanding production seasonal schedules. ASB Industries has a wide variety of solutions incorporated in many critical components.
If your application requires a specific finish, then ASB Industries in most cases will be able to complete your carbide coated surface to varying surfaces finishes or Ra. From large to small components, ASB Industries will most likely be able to finish your project with our diamond grinding and diamond super finishing equipment.
2013年8月8日星期四
Tungsten Carbide Bearings
The tungsten carbide bearing inserted tungsten carbide adopts the advance technology with the high strength and long life features. The cemented carbide bearing surface with the cemented carbide material, special solder and welded to a whole body with the basis part through sinter treatment, makes the cemented carbide bearing with the high strength, long life, anti-wear, anti-impact and high load. The standard bearing used is a Carbon-Graphite compound which has excellent corrosion resistant characteristics when operating in most liquid environments. Certain fluids will attack the binder or process streams may contain abrasive solids which preclude the use of carbon-graphite bearing. In these cases alternate materials are available such as:carbide bearing
Silicon Carbide
Carbon-Graphite
Aluminum Oxide (ALOX)
A brief description of each of these tungsten carbide bearings materials.
CARBON-GRAPHITE
These are materials manufactured from a blending of Carbon and Graphite powders with a hydrocarbon binder. The result is a materials which is resistant to wear, chemically resistant and thermally stable. There are many grades of Carbon-Graphite bearing materials. The shaft journal treatments M-2, M-3 or NCB can be used with type B bearings although it is not necessary. Journal treatment will extend the life of the shaft since it will resist abrasion if the bearings run dry or are exposed to abrasive particles. See Engineering data sheet 26E for more informationconcerning shaft coatings. When a tungsten carbide bearing wear detector is used, the maximum fluid temperature for a sleeved, bearing is 400°F.
SILICON CARBIDE
This material is a self sintered, high density hardened material with very good wear and chemical resistance. Silicon carbide is very wear resistance but care must be taken when applying this material because silicon carbide is brittle making it susceptible to thermal and mechanical shock. This type of cemented carbide bearing is much less forgiving than carbon graphite when system upsets, such as dry running and cavitation, occur. Silicon graphite bearings do not wear gradually. If the bearings fail they normally shatter into many pieces causing a catastrophic failure.
CARBON-GRAPHITE - This is a grade of Carbon-Graphite which is used primarily in Hydrofluoric Acid service. Experience has shown that the binder of the carbon graphite type B bearings is attacked by hydrofluoric acid causing the bearing to swell and seize on the shaft. The type F-2 graphite composition is inert to hydrofluoric acid attack.
This grade can be used on other applications, but most are covered by the Type B bearing which is less expensive and more readily available. Run dry or are exposed to abrasive particles. See Engineering data sheet 26E for more information concerning shaft coatings.
Aluminum Oxide
This material is very similar to silicon carbide with regard to wear and chemical resistance. Aluminum oxide is also very susceptible to thermal and mechanical shock.
Silicon Carbide
Carbon-Graphite
Aluminum Oxide (ALOX)
A brief description of each of these tungsten carbide bearings materials.
CARBON-GRAPHITE
These are materials manufactured from a blending of Carbon and Graphite powders with a hydrocarbon binder. The result is a materials which is resistant to wear, chemically resistant and thermally stable. There are many grades of Carbon-Graphite bearing materials. The shaft journal treatments M-2, M-3 or NCB can be used with type B bearings although it is not necessary. Journal treatment will extend the life of the shaft since it will resist abrasion if the bearings run dry or are exposed to abrasive particles. See Engineering data sheet 26E for more informationconcerning shaft coatings. When a tungsten carbide bearing wear detector is used, the maximum fluid temperature for a sleeved, bearing is 400°F.
SILICON CARBIDE
This material is a self sintered, high density hardened material with very good wear and chemical resistance. Silicon carbide is very wear resistance but care must be taken when applying this material because silicon carbide is brittle making it susceptible to thermal and mechanical shock. This type of cemented carbide bearing is much less forgiving than carbon graphite when system upsets, such as dry running and cavitation, occur. Silicon graphite bearings do not wear gradually. If the bearings fail they normally shatter into many pieces causing a catastrophic failure.
CARBON-GRAPHITE - This is a grade of Carbon-Graphite which is used primarily in Hydrofluoric Acid service. Experience has shown that the binder of the carbon graphite type B bearings is attacked by hydrofluoric acid causing the bearing to swell and seize on the shaft. The type F-2 graphite composition is inert to hydrofluoric acid attack.
This grade can be used on other applications, but most are covered by the Type B bearing which is less expensive and more readily available. Run dry or are exposed to abrasive particles. See Engineering data sheet 26E for more information concerning shaft coatings.
Aluminum Oxide
This material is very similar to silicon carbide with regard to wear and chemical resistance. Aluminum oxide is also very susceptible to thermal and mechanical shock.
Tungsten Carbide Bars
Chinatungsten Online is a special tungsten carbide manufacturer and exporter in mainland of China, it supplies nearly all kinds of products made of tungsten carbide, e.g. tungsten carbide bars, tungsten carbide strips, tungsten carbide rods, tungsten carbide seals, tungsten carbide button and so on.
Tungsten carbide bar is widely known as one kind of carbide cutting tools, it's available for different grinding geometric parameters and suitable for both cutting materials and nonmetal materials, also it can be applied to conventional,tungsten carbide insert, semi-automatic lathe, automatic lathe and planning machine to work grooves and operate cutting, etc.
Main advantages of tungsten carbide bars:
1. High hardness after quenching and tempering
2. Excellent wear resistance
3. Excellent hot-work performance
We have many years' experience to supply our clients the mentioned high-quality products with most competitive prices. If you are interested in any products or have any questions, please CONTACT US directly.
It is always our principles to offer our best service to any clients at any time.
Tungsten carbide bar is widely known as one kind of carbide cutting tools, it's available for different grinding geometric parameters and suitable for both cutting materials and nonmetal materials, also it can be applied to conventional,tungsten carbide insert, semi-automatic lathe, automatic lathe and planning machine to work grooves and operate cutting, etc.
Main advantages of tungsten carbide bars:
1. High hardness after quenching and tempering
2. Excellent wear resistance
3. Excellent hot-work performance
We have many years' experience to supply our clients the mentioned high-quality products with most competitive prices. If you are interested in any products or have any questions, please CONTACT US directly.
It is always our principles to offer our best service to any clients at any time.
Tungsten Carbide Plates
CHINATUNGSTEN ONLINE manufacture tungsten carbide plates in different specifications according to clients' specific requirements. The surface condition are divided as sintered blank and grinding, which meet different products applications. Following is a drawing showing the carbide plates we supplied.
Tungsten carbide plates are used for cutting metal, wood and other materials. The advantages of our carbide cutting plates are smooth, fast cutting speed and have a long service time. Unlimited tracks of grades and sizes of carbide plates are available in our company.
We produce tungsten carbide plates in different sizes and qualities. We accept orders of all types of special products designed for our customers.
All our tungsten carbide plate products must be inspected strictly and only those without any damage, such as pores can be sent out.
Thickness, width, as well as Length can be various. If you have interest in purchasing our products, kindly please provide us the following necessary information for production:
specific dimensions including length, width, and thickness;
dimension tolerance if you have;
surface condition: sintered blank or grinding;
quantity;
tungsten carbide grade or chemical composition.
Tungsten carbide plates are used for cutting metal, wood and other materials. The advantages of our carbide cutting plates are smooth, fast cutting speed and have a long service time. Unlimited tracks of grades and sizes of carbide plates are available in our company.
We produce tungsten carbide plates in different sizes and qualities. We accept orders of all types of special products designed for our customers.
All our tungsten carbide plate products must be inspected strictly and only those without any damage, such as pores can be sent out.
Thickness, width, as well as Length can be various. If you have interest in purchasing our products, kindly please provide us the following necessary information for production:
specific dimensions including length, width, and thickness;
dimension tolerance if you have;
surface condition: sintered blank or grinding;
quantity;
tungsten carbide grade or chemical composition.
Tungsten Carbide Saw
Tungsten carbide saws the most commonly used wood processing cutting tools, the quality and processing quality of tungsten carbide saws are closely related. Reasonable selection of our products is significant for improving product quality, shortening the processing cycle and reducing processing costs.
Tungsten carbide saws are supplied in a range of standard sizes for wood and steel-sawing applications.
Using the latest technologies and materials, our solid carbide saw blades are high performance products. These kinds of carbide saw blades are specially manufactured for cutting off and slotting metal materials such as plain steel, chilled steel, aluminum and copper as well as difficult-to-machine materials such as stainless steel, titanium alloys and printed circuit board.
We are one of most professional producer of high quality tungsten carbide saw for TCT saw blades in woodworking and metalworking.
Through years' efforts in making high quality tungsten carbide saw, we have gained rich experience in grade researching, mould designing, automatic press, HIP sintered, surface treating and quality control. Now our monthly capacity is 50 tons. Various saw tips have been recognized by the worldwide maker of saws and tools.
Have following advantages: Grade Complete, Stable performance, easy to welding, no broken tooth, good wear resistance, high efficiency.
Material: Virgin raw materials
Our tungsten carbide saws are specialized in cutting all kinds of grass, wood, composite wood, aluminum, metal and etc. Different grade s are available, such as K01, K05, K10, K20, K30, K40, P40, M30 etc.
We have our own mould production line to tailor-make any size according to our customers' drawings.
Tungsten carbide saws are supplied in a range of standard sizes for wood and steel-sawing applications.
Using the latest technologies and materials, our solid carbide saw blades are high performance products. These kinds of carbide saw blades are specially manufactured for cutting off and slotting metal materials such as plain steel, chilled steel, aluminum and copper as well as difficult-to-machine materials such as stainless steel, titanium alloys and printed circuit board.
We are one of most professional producer of high quality tungsten carbide saw for TCT saw blades in woodworking and metalworking.
Through years' efforts in making high quality tungsten carbide saw, we have gained rich experience in grade researching, mould designing, automatic press, HIP sintered, surface treating and quality control. Now our monthly capacity is 50 tons. Various saw tips have been recognized by the worldwide maker of saws and tools.
Have following advantages: Grade Complete, Stable performance, easy to welding, no broken tooth, good wear resistance, high efficiency.
Material: Virgin raw materials
Our tungsten carbide saws are specialized in cutting all kinds of grass, wood, composite wood, aluminum, metal and etc. Different grade s are available, such as K01, K05, K10, K20, K30, K40, P40, M30 etc.
We have our own mould production line to tailor-make any size according to our customers' drawings.
Tungsten Carbide Balls
Tungsten Carbide Balls Applications
The applications of tungsten carbide balls are extremely broad, such as: precise bearings, instruments, meters, pen, spraying machines, pumps, machinery parts, valve seals, brake pump, extruding hole, oil, hydrochloric acid lab, hardness measuring instrument, fishing gear, with heavy, ornamented, finished, and some other high-end industry!
High hardness and dimensional stability make tungsten carbide balls the preferred choice for precision hydraulic valves, high-load bearings, inertial navigation systems, ball screws, linear bearings in sideways, gauging and checking instruments, and meters. Tungsten carbide balls are also used for balloting, to work-harden and improve fretting fatigue strength.
Tungsten carbide balls are standard for Rockwell testing, and for Brinell testing of materials in the range of 444-627 HB.
Tungsten Carbide Balls Characteristics
Tungsten carbide balls are ideal for applications where extreme hardness must be accompanied by high resistance to wear and impact. They are well-suited to elevated temperatures, corrosion, humidity, abrasion, and poor lubrication conditions.
Tungsten Carbide Balls Mechanical Properties
• Ultimate tensile strength 220,000 psi
• Ultimate compressive strength 643,000 psi
• Transverse rupture strength 228,000 psi
• Modulus of elasticity 98,000,000
• Density (approx.) 0.54 lb./in.
• Specific gravity 14.85-15.5
• Electrically conductive slightly magnetic
• Low thermal expansion rate
Tungsten carbide balls from Chinatungsten Online are tested using a gage that is accurate to ±0.0001 (grades 10, 15 and 25) to insure conformance with standards, as well as individual customer quality requirements.
The applications of tungsten carbide balls are extremely broad, such as: precise bearings, instruments, meters, pen, spraying machines, pumps, machinery parts, valve seals, brake pump, extruding hole, oil, hydrochloric acid lab, hardness measuring instrument, fishing gear, with heavy, ornamented, finished, and some other high-end industry!
High hardness and dimensional stability make tungsten carbide balls the preferred choice for precision hydraulic valves, high-load bearings, inertial navigation systems, ball screws, linear bearings in sideways, gauging and checking instruments, and meters. Tungsten carbide balls are also used for balloting, to work-harden and improve fretting fatigue strength.
Tungsten carbide balls are standard for Rockwell testing, and for Brinell testing of materials in the range of 444-627 HB.
Tungsten Carbide Balls Characteristics
Tungsten carbide balls are ideal for applications where extreme hardness must be accompanied by high resistance to wear and impact. They are well-suited to elevated temperatures, corrosion, humidity, abrasion, and poor lubrication conditions.
Tungsten Carbide Balls Mechanical Properties
• Ultimate tensile strength 220,000 psi
• Ultimate compressive strength 643,000 psi
• Transverse rupture strength 228,000 psi
• Modulus of elasticity 98,000,000
• Density (approx.) 0.54 lb./in.
• Specific gravity 14.85-15.5
• Electrically conductive slightly magnetic
• Low thermal expansion rate
Tungsten carbide balls from Chinatungsten Online are tested using a gage that is accurate to ±0.0001 (grades 10, 15 and 25) to insure conformance with standards, as well as individual customer quality requirements.
订阅：
博文 (Atom)