Tantalum Rods
Tantalum Rods come in a huge choice of 170 size variations. Tantalum offers excellent corrosion resistance, good conductivity, biocompatibility and a high melting point of approximately 3,020 degrees Celsius (5,468 degrees Fahrenheit). Properties that make this material prized across a range of industries, including electronics, aerospace, medical, chemical and nuclear. Its many applications include being used in chemical processing equipment, aircraft components, rocket engines and electronic devices. The availability of Tantalum Rods in such as wide range of diameters and lengths makes them suitable for prototypes through high volume production runs.
Advantages of Tantalum Rods
Material properties
Tantalum is a corrosion-resistant, high-melting-point, high-density metal. It has excellent corrosion resistance and has good resistance to corrosive media such as strong acid and strong alkali.
High melting point
Tantalum has a very high melting point, approximately 3017 degrees celsius (5463 degrees fahrenheit). This enables tantalum to maintain stability in high-temperature environments, making it suitable for applications in high-temperature processes and special environments.
Thermal conductivity
Tantalum has good thermal conductivity, which makes tantalum rods useful in some applications that require high thermal conductivity, such as heat-conducting components in semiconductor manufacturing.
Mechanical properties
Tantalum rods have moderate mechanical properties that can be tailored to the requirements of a specific application with appropriate processing and handling. This makes it very useful in manufacturing various industrial parts.
Why Choose US
Our Factory
Baoji Yusheng Metal Technology Co., Ltd. is a professional manufacturer. It is a high–tech enterprise integrating the processing, production, technology, research and development rare metals as well as sales. It's located in Wen quan village Industrial Zone, BaoTai Road, Gaoxin Development Zone, Baoji City, Shaanxi Province.
Company Equipment
We have 350KW electron beam bombardment furnace, 2000T hydraulic press, 1700mm vacuum annealing furnace, one 42KW and two 15KW fine forging machines, 14-roll fine foil rolling machine, LDD120, LDD-40, LDD-15, LDD-8 double line pipe rolling machine. 2-roll 500T open billet mill, 4-roll cold rolling machine, 6-roll cold rolling machine, 15KW double-sided drawing machine, cylindrical grinding machine, skinning machine, surface grinding machine and a series of other equipment.
Professional Team
The company has many years of experience in technology with a high-quality work team, can timely provide customers with perfect after-sales service .Professional qualifications, to create brand is Yusheng's business objectives. excellent quality, reliable price is the Yusheng's business purposes.
Rich Experience
Seek progress through innovation, Seek development through win-win cooperation is our production and business philosophy. The full implementation of 6S management to ensure consistent and stable product quality.
Tantalum (pronounced tan-ta-lum) is number 73 on the periodic table. Rarely occurring in nature, tantalum is typically found in the ore columbite-tantalite. When refined, pure tantalum metal is a lustrous blue-gray color, similar in color to platinum.
Pure Tantalum: Tantalum has one of the highest melting and boiling points of all the chemical elements [3017 °C (5462 °F) and 5458 °C (9856 °F), respectively]. Its density (16.7 g/cm3), is nearly half again as high as lead's (11.3 g/cm3). Its thermal conductivity [35 W/(M･K)] is quite low, only 20%-25% of molybdenum's or tungsten's, and less than half of iron's. Its thermal expansion coefficient (6.3･10-6 K-1) is about 30%-40% higher than tungsten's and 50% greater than molybdenum's. Pure tantalum is a very ductile metal, and can be manipulated by bending, stamping & pressing.
Nickel Tantalum Alloys: When added as an alloy to nickel, the resulting alloys containing 3 – 11% tantalum exhibit enhanced strength, a higher melting point and are resistant to corrosion by hot gases.
Tantalum Alloys: When alloyed with other metals, tantalum is used to make super alloys used in chemical processing, jet engines and nuclear reactors.
How to Choose Between Tantalum Metal and Tantalum Tungsten Alloys
Overview of tantalum metal: Features and applications
Tantalum metal is known for its unique attributes, which make it highly valuable in various industries. This rare, blue-gray transition metal boasts a high melting point and exceptional corrosion resistance, making it an excellent choice for creating components for electronics, aerospace, and medical devices. Tantalum is used in capacitors, which allow electronic devices to store electrical energy. Additionally, it can be found in alloys, coatings, and superconductors that are used in high-tech industries. Its biocompatibility also makes it an ideal material for medical implants, as it is resistant to bodily fluids and does not cause an immune response. tantalum metal has many features that make it a sought-after material in various sectors.
How do tantalum tungsten alloys enhance tantalum's properties?
Tantalum tungsten alloys are a powerful combination of metals that significantly enhance tantalum's properties. Tantalum is known for its remarkable resistance to corrosion and high melting point, making it a popular material for a broad range of applications. However, when combined with tungsten, tantalum's properties are further amplified. Tungsten is known for its extreme hardness and high density, making it an ideal partner to tantalum's strengths. Together, these metals create a formidable alloy that can withstand even the harshest environments, making it an essential material for industries such as aerospace and medical technology.
Side-by-side comparison: Tantalum metal vs tantalum tungsten alloys
When it comes to the world of metals, tantalum is a true standout. But which is better: Pure tantalum metal or tantalum tungsten alloys? While both materials share many similarities, including high melting points and exceptional corrosion resistance, each has unique characteristics that set it apart from the other. Pure tantalum metal, for instance, boasts superior ductility and is excellent at enhancing electrical conductivity. In contrast, tantalum tungsten alloys offer greater strength and durability, making them perfect for high-stress environments. Ultimately, the choice between the two comes down to the specific needs of the application. Whether you're seeking strength or conductivity, either pure tantalum metal or tantalum tungsten alloys will provide the quality and reliability that this remarkable metal is known for.
Tantalum metal and tantalum tungsten alloys are two materials with unique and beneficial properties that make them ideal for specific engineering applications. Tantalum metal has a melting point of 3290°c and a high resistance to corrosive agents, making it perfect for chemical vessels and lipoprotein capsules. It also excels in electrical insulation for capacitors and medical implants due to its high capacity to store electrical charge. Combining metals with other elements can enhance properties even further, as evidenced by the improved strength-to-weight ratio and higher thermal stability associated with tantalum tungsten alloys. These alloys are often found in aircraft helmets, aerospace components, fastening devices, jet engines, x-ray equipment, surgical tools, metallized films or coatings.
Tantalum Rod Applications
Electronics industry: Due to its high melting point, low vapor pressure and good electrical properties, tantalum is widely used in the manufacture of electronic equipment such as vacuum tubes, transistors, integrated circuits and electronic connectors.
Aerospace industry: Due to its high strength, low density and good high-temperature performance, Tantalum is often used in the aerospace industry to manufacture structural components for aircraft and rockets as well as parts for high-temperature furnaces.
Medical field: Due to its biocompatibility and corrosion resistance, Tantalum is widely used in the medical field for the manufacture of medical implants, such as hip and knee implants, dental implants and cardiovascular devices.
Chemical and petroleum industry: Tantalum is resistant to corrosion by most acids and alkalis and is therefore used in the manufacture of chemical reaction vessels, pipes, valves and pumps. In the oil industry, Tantalum is also used to manufacture oil drilling equipment and pipework.
High-temperature industry: In addition to the above applications, Tantalum is also used in the manufacture of furnace tubes for high-temperature furnaces, crucibles, thermocouple protection tubes and metalworking tools.
Material Specifications
Standard Specifications: ASTM B364, B365, B521, B708 and F560
Standard tantalum materials and UNS numbers: R005200, R05400 (pure tantalum), R05252 (alloyed 2.5% tungsten), R05255 (10% tungsten).
Due to its excellent machinability and low temperature ductility, tantalum has good strength at high temperatures up to 3500°F (1926°C), making it an ideal alloy for aerospace components. Tantalum alloys can be divided into two categories:
1) Ta-10W-2.5Moly, Ta-5W-2.5Moly, & Ta-8W-2Hf (Solid solution strengthened alloy)
(2) Ta-9.6W-2.4Hf-0.01C, Ta-6.5W-3.0Re-1.0Hf-0.3Zr-0.025Y and other complex alloy systems using solid solution strengthening and/or dispersion strengthening.
Tab.lchemical composition of the ASTM B708 RO5252 tantalum sheet,%
|
Elements Material |
Ta |
Fe |
Si |
Ni |
W |
Mo |
Ti |
Nb |
O |
C |
H |
N |
|
ASTM B708 RO5252 |
mar |
0.007 |
0.004 |
0.008 |
2.4 |
0.015 |
0.005 |
0.15 |
0.015 |
0.008 |
0.01 |
0.01 |
Tantalum niobium ore is the main raw material for the production of tantalum, but it is often associated with a variety of metal, so the main step is the decomposition of tantalum smelting concentrates, purification and separation of tantalum and niobium, produced pure compound of tantalum and niobium, finally, we can produce metal.
To achieve ore - decomposition, we can use the hydrofluoric acid decomposition method, sodium hydroxide melting method, and chlorination. The method can be used in the separation of tantalum and niobium by solvent extraction, fractional crystallization, and ion exchange method.
Preparation of tantalum
The preparation of tantalum is the process of reducing pure tantalum compound to metal tantalum. The raw materials are five tantalum oxide, tantalum chloride, five tantalum fluoride, and fluoride (such as k2taf7,). The reducing agent is sodium, magnesium and other active metals and carbon and hydrogen. The melting point of tantalum is as high as 3669k, so it is powder or spongy metal after reduction. It is necessary to further smelting or refining, in order to get dense metal.
The tantalum preparation methods are sodium thermal reduction, carbon thermal reduction, and molten salt electrolysis. Sodium thermal reduction of potassium tantalate is the most widely used method of tantalum production in the world.
The tantalum powder has a complex shape and large specific surface area. Carbon thermal reduction of five oxidation of tantalum has been an industrial method for the production of tantalum, but because the purity of the product is not high enough, is not as widely used as the sodium reduction method. The molten salt electrolysis method is divided into two ways: Electrolyte electrolysis and oxygen-free electrolyte electrolysis. Molten salt electrolysis can only produce metallurgical grade tantalum powder. Five hydrogen fluoride reduction is considered to be one of the most promising methods for tantalum production, but it has not been used in industrial production because of the high requirements of equipment material and environmental protection.
The majority of tantalum powder is directly used for tantalum capacitors in the electronic manufacturing industry, so the tantalum milling process, such as preparation of tantalum metal is also from tantalum and tantalum powder by vacuum heat treatment, capacitor grade tantalum powder hydrogenation method category.
Processing Technology of Tantalum Bar to Wire
The production of tantalum wire is usually carried out by powder metallurgy or another isostatic pressing, vacuum sintering to obtain a tantalum rod, followed by cold rolling and surface cleaning to obtain a tantalum strip, and then the wire is obtained by surface oxidation coating, stretching, pickling, water washing, and annealing. The processing process of the tantalum bar to wire includes the following steps.
Isostatic molding
The chemical composition of the tantalum powder raw material for preparing the tantalum should meet the specified requirements, and the particle size distribution should satisfy the requirement that 100% is less than 0.074 m, and the content of less than 0.038 m (400) is not less than 60%. The bar blank after press forming requires no defects on the surface, no cracks, and has a certain strength, reaching 70% of the theoretical density.
Vacuum sintering
Usually, the melt sintering is performed, the sintering vacuum should be less than 0.133pa, and the highest sintering temperature should be controlled within 2600 °c. Generally, after two times of vertical melting and sintering, the relative density of the tantalum can reach about 98%, and the surface of the tantalum is required to be smooth, without cracks, melted tumor knots, and bubbling.
Cold rolling
The production of tantalum wire and the forging of tantalum bars are generally carried out by cold rolling. It can be used as a manufacturing process before die forging, or it can be directly rolled into an ingot. Roll forging is a process in which a tantalum rod is passed through a pair of rotating wrought rolls equipped with circular arc dies, and plastically deformed by means of a cavity to obtain the desired ingot.
Anodizing
The purpose of anodizing is to uniformly coat an oxide film on the surface of the tantalum ingot (wire). As a carrier of the lubricant, the oxide film can uniformly and firmly adhere the lubricant, which can reduce the tensile friction coefficient, ensure the surface quality of the silk, and cannot directly contact the metal and the mold, then prevent the bonding and improve the tensile performance.
The standard of the oxide film is that the adhesion is strong, the micro-tightness is firm, the color is not easy to fall off, the thickness is uniform, the insulation is good, the residual current is small, and the surface is less crystalline.
Stretching
Stretching is a major process in the production of tantalum wire. The choice of lubricant, drawing die, stretching pass, and stretching speed will directly affect the quality of the wire. The stretching of tantalum is divided into thick wire and fine wire. Solid wax is generally used as a lubricant for roughening the thick tantalum wire with an oxide film, and an aqueous solution of grease soap is generally used as a lubricant when the tantalum wire with oxide film is finely drawn. The tensile die has cemented carbide and diamond, the latter is better but more expensive. The processing rate of the stretching pass depends mainly on the quality of the oxide film and the quality of the lubricant.
The surface of the wire after stretching is stuck with oil and residual oxide film, so it is necessary to clean the surface with acid and then with pure water. For the fine wire, the acidity of the pickling and the pickling time is strictly controlled. When the oxygen content and the surface brightness are good, the acidity and pickling time should be minimized.
Vacuum annealing
Annealing of the tantalum wire includes two parts, intermediate annealing and finished annealing. The purpose of intermediate annealing is to eliminate work hardening and improve the processing plasticity of the wire to continue stretching, while annealing is to achieve the desired properties of the finished product.
Tantalum has good plasticity at room temperature, and the work hardening tendency at room temperature is not large. The practice has shown that the billet produced by powder metallurgy can be processed until the total deformation rate is about 95%; the total deformation rate of the extruded billet by electron beam melting and consumable arc melting can reach more than 99%. After the recrystallization annealing, the plasticity of tantalum at room temperature is completely recovered.
Wire rewinding
In order to facilitate the material leaving the factory after the wire has been annealed, it is generally necessary to rewind on a certain winding machine. When rewinding, it is necessary to prevent the surface from being stained or scratched and to prevent twisting.