Density: Standard Hardness: Standard Resistivity: Standard Compressive Strength: Standard Flexural Strength: Standard Tensile Strength: Standard Thermal Expansion Coefficient: Standard Thermal Conductivity: Standard Particle Size: Standard Color: Black Specification: Standard Block Whether to Customize: Yes Packaging: wooden box
Graphite has a high scattering cross-section and a low thermal neutron absorption cross-section. The high scattering cross-section is used to moderate neutrons, and the low absorption cross-section prevents neutrons from being absorbed, allowing nuclear reactors to reach criticality or operate normally using a small amount of fuel.
Graphite is a high-temperature resistant material with a triple point of 4024°C. Therefore, it cannot be manufactured by thermal processing methods such as smelting, casting, forging, etc., but can only be produced by methods similar to powder metallurgy. It does not decrease in strength with temperature like metal but increases slightly, and there will be no problem when applied below 2000 °C.
It is a comprehensive graphite supplier dedicated to the development of the graphite manufacturing industry, engaged in research and development, processing, manufacturing, and sales of graphite products. Based on strong technical force and economic strength, the company continuously develops graphite products at a domestic technical level and provides customers with integrated services from material selection to designing programming and mechanical processing. The company is committed to providing customers with perfect graphite raw materials and high-quality graphite-processed products.
Our products mainly use German SGL graphite (SGL), Japanese Tokai graphite (), American Bugao graphite (POCO), Japanese Toyo graphite (TOYO), French Mersen graphite (), and other imported graphite raw materials. Hongnaide sells domestic isostatic graphite, high-purity graphite, medium-coarse graphite, and other graphite raw materials, and has established cooperative relations with many domestic graphite manufacturers. In addition to mechanical processing, we also provide post-processing services such as graphitization and secondary purification, coating, impregnation, etc., and provide customers with comprehensive product services at preferential prices. Therefore, we can control and guarantee stable high-quality, and high-performance products.
The company's business areas include graphite plates, graphite rods, graphite modules, EDM electricity, graphite thermal fields, graphite heating elements, graphite furnace bed plates, graphite bolts, nuts, graphite vacuum furnace accessories, graphite heaters, mono/polycrystalline silicon ingot furnaces, Graphite boat, graphite bearing, graphite crucible, graphite felt, graphite rope, graphite paper, graphite positive and negative plates, graphite parts for quartz glass production, graphite block for rotary kiln, vacuum resistance furnace, induction furnace, sintering furnace, graphite ring aluminum Material production, graphite molds for rolls, strips, plates, etc., electronic graphite molds, resin, metal, antimony, copper impregnated graphite, fuel cell bipolar plates, semiconductor graphite parts, 3D mobile phone glass hot bending graphite molds, various graphite parts, special-shaped parts processing, etc.
The main characteristics of graphite products:
1. High-temperature resistance: Graphite block is one of the currently known high-temperature resistant materials. The melting point is 3850℃±50℃, and the boiling point is 4250℃. 7000°C high temperature arc for 10S, the loss of graphite is small. The total loss of graphite was 0.8%. It can be seen that the high-temperature resistance of graphite is very high.
2. Excellent thermal shock resistance: graphite has good thermal shock resistance, that is, when the temperature changes sharply, the thermal expansion coefficient is small, so it has good thermal stability, and no cracks will occur when the temperature changes sharply.
3. Thermal conductivity and electrical conductivity: Graphite has good thermal conductivity and electrical conductivity. Compared with general materials, its thermal conductivity is quite high. 4 times higher than stainless steel, 2 times higher than carbon steel, and higher than carbon steel. Generally non-metallic is 100 times higher.
4. Lubricity: The lubricity of graphite is similar to that of molybdenum disulfide, and the friction coefficient is less than 0.1. Its lubricity varies with scale size. The larger the scales, the smaller the coefficient of friction and the better the lubricity.
5. Chemical stability: Graphite has good chemical stability at room temperature and can resist acid, alkali, and corrosion.
Product characteristics of EDM graphite
Own production line ensures a stable supply of raw materials
A low-cost solution for your graphite application
Here you can find complete graphite specifications and grades
In the current industrial field, with the development of the economy and technology, the technical requirements for precision molds are getting higher and higher. Therefore, EDM, that is, the position of EDM in this precision mold processing is valued, so the screening of EDM materials has been highly valued by the industry.
In the past, in the selection of electrical raw materials, electrolytic copper, copper tungsten, silver tungsten, etc. were mostly chosen. Of course, traditional graphite is also a good choice. So why was graphite not used as a graphite material for EDM in the early years? This is because considering comprehensive factors such as cost, quality, and work efficiency, most graphite manufacturers choose electrolytic copper as the graphite raw material for EDM.
A production method that directly and continuously (or semi-continuously) manufactures rods or pipes in a molten metal state. Artificial graphite is considered a suitable material for continuous or semi-continuous casting of non-ferrous metals. In production practice, graphite molds are used in the continuous casting industry because of their good thermal conductivity (thermal conductivity determines the solidification speed of metals or alloys), good self-lubricating properties of molds, etc., which not only increase the casting speed but also due to the ingot size Large, smooth surface, uniform crystal structure, can be directly processed in the next process. This not only greatly improves the yield rate and reduces the loss of waste products, but also greatly improves the product quality.
Many factors determine the life of continuous-casting graphite molds. From the composition of the casting material to the casting temperature, to the cooling rate, it will affect the life of the graphite mold. The specific grade of graphite used is also determined by a variety of factors. The main factor is the technical field of material used for the mold to be cast. For example, for gray cast iron or high nickel alloys, damaged graphite is desired, while for brass, relatively dense graphite with sufficient open porosity to allow zinc evaporation would be a better choice.
Designing graphite molds for continuous casting requires considering all of these factors and applying them to your specific application. Grade selection is important and should include input from casters, graphite manufacturers, and the machine shop that processes the graphite. Nonetheless, when designing a new system, actual trials may be required before selecting an actual graphite grade.
We currently offer the following casting graphite molds:
Non-ferrous metals (bronze, brass, aluminum, and copper)
Precious metals (gold, silver, precious stones), etc.
It is a comprehensive graphite supplier dedicated to the development of the graphite manufacturing industry, engaged in research and development, processing, manufacturing, and sales of graphite products. Based on strong technical force and economic strength, the company continuously develops graphite products at a domestic technical level and provides customers with integrated services from material selection to designing programming and mechanical processing. The company is committed to providing customers with perfect graphite raw materials and high-quality graphite-processed products.
The company has advanced graphite processing equipment and advanced production technology. Processing equipment includes graphite CNC machining center, CNC milling machine, CNC lathe, surface grinder, large sawing machine, three-dimensional detector, and other processing and testing equipment. Difficulty with graphite products.
The company's business areas include graphite plates, graphite rods, graphite modules, EDM electricity, graphite thermal fields, graphite heating elements, graphite furnace bed plates, graphite bolts, nuts, graphite vacuum furnace accessories, graphite heaters, mono/polycrystalline silicon ingot furnaces, Graphite boat, graphite bearing, graphite crucible, graphite felt, graphite rope, graphite paper, graphite positive and negative plates, graphite parts for quartz glass production, graphite block for rotary kiln, vacuum resistance furnace, induction furnace, sintering furnace, graphite ring aluminum Material production, graphite molds for rolls, strips, plates, etc., electronic graphite molds, resin, metal, antimony, copper impregnated graphite, fuel cell bipolar plates, semiconductor graphite parts, 3D mobile phone glass hot bending graphite molds, various graphite parts, special-shaped parts processing, etc.
Graphite has a high scattering cross-section and a low thermal neutron absorption cross-section. The high scattering cross-section is used to moderate neutrons, and the low absorption cross-section prevents neutrons from being absorbed, allowing nuclear reactors to reach criticality or operate normally using a small amount of fuel.
Graphite is a high-temperature resistant material with a triple point of 4024°C. Therefore, it cannot be manufactured by thermal processing methods such as smelting, casting, forging, etc., but can only be produced by methods similar to powder metallurgy. It does not decrease in strength with temperature like metal but increases slightly, and there will be no problem when applied below 2000 °C.
Graphite has good thermal conductivity, which can effectively reduce the temperature gradient in the stack without generating too much thermal stress.
Graphite is chemically very stable. In addition to anti-oxidation and water vapor at high temperatures, it is also resistant to acid, alkali, and salt corrosion, so it can be used as the core component of molten salt nuclear reactors and uranium-bismuth nuclear reactors.
Graphite has good radiation resistance and can serve for 30 to 40 years in the reactor for a long time.
Graphite has good machinability and can be processed into components of various shapes.
Graphite raw materials are abundant and cheap, and it is easy to produce various nuclear graphites with high purity, high strength, and different density requirements, but graphite also has disadvantages. It has an isotropic crystal structure and is distributed in layers. The atoms are densely packed on the a and b crystal planes. The short distance between the atoms in the same layer is 0. They are covalently bonded to each other and have a strong binding force. ; When the layer distance is 0, the bonding force between layers is van der Waals force, and the bonding force is weak. This anisotropy is strongly manifested in the physical, strength, and irradiation behavior of graphite.
The development of the photovoltaic industry is inseparable from the application of graphite materials in the photovoltaic industry. In the photovoltaic industry, a large number of high-purity graphite materials are used in the heating system of the Czochralski single-crystal furnace. In the 21st century, with the rapid development of the photovoltaic industry, the output and market demand of polycrystalline silicon ingot materials for solar cells have increased by leaps and bounds, which also provides a new market with broad development prospects for graphite products in this field.
Graphite parts used in single crystal furnaces are vulnerable parts processed from various high-purity graphites. All components and systems are fabricated from isostatic graphite, or custom molded high purity graphite upon request to your order.
The photovoltaic industry involves the upstream and downstream of the single crystal furnace industry, polycrystalline furnace industry, and other industries. Product output.