Carbon fiber composite materials first appeared in the United States in the 1940s. After decades of development, they have become more and more widely used in high-end fields such as military, electronic and civilian fields. This article is the editor of the Be-cu prototype. Let us introduce the advantages and properties of carbon fiber.

In terms of mechanical properties, although carbon fiber is a fiber material, before it is made into a product, the flexibility and plasticity of carbon fiber composite materials are very outstanding. At the same time, its mechanical properties are also very good. The tensile strength of commonly used T300 carbon fiber can reach 3500MPa , and the higher the grade of carbon fiber, the more pronounced it is.

Its comprehensive index of specific strength and specific modulus is the highest among existing structural materials, and it also has excellent bending strength and shear strength, which can meet the needs of use strength.

Hardness And Strength

Tensile strength: The tensile strength of carbon fiber products is about 10 times that of steel. Carbon fiber composite materials are transformed from organic fibers through a series of heat treatments. They are inorganic high-performance fibers with a carbon content of more than 90%. They are a new material with excellent mechanical properties. They have the inherent characteristics of carbon materials and the characteristics of textile fibers. Soft and processable, it is a new generation of reinforcing fiber. Carbon fiber product manufacturers Because carbon fiber has extremely high material properties, carbon fiber products have high strength and high hardness, far exceeding metal materials of the same volume and weight. Therefore, carbon fiber products are widely used in high-tech industrial fields such as aviation, navigation, and aerospace industry.

High fatigue strength: The structure of carbon fiber products is firm. After millions of stress fatigue cycle tests, the composite material still has a strength retention rate of 60%, compared with 40% for steel and 30% for aluminum. FRP is only 20%-25%. Therefore, the safety factor for designed products is the lowest for carbon fiber composite materials.

Elastic modulus: The tensile elastic modulus of carbon fiber composite materials is higher than that of steel, but the tensile elastic modulus of aramid and glass fiber composite materials are only half and one-quarter of steel.

Fatigue strength: The fatigue strength of carbon fiber products and aramid fiber composite materials is higher than that of high-strength wire. Carbon fiber product manufacturers Because carbon fiber has extremely high material properties, carbon fiber products have high strength and high hardness, far exceeding metal materials of the same volume and weight. Therefore, carbon fiber products are widely used in high-tech industrial fields such as aviation, navigation, and military industry. Under the action of alternating stress, the fatigue limit of metal materials is only 30% to 40% of the static load strength. Because the fiber and matrix composite can slow down the expansion of cracks, and there is the possibility of reallocation of the internal force of the fiber, the fatigue limit of the composite material is relatively high, about 70% to 80% of the static load strength, and there are obvious signs of deformation before failure. .

Physical Properties

Weight: about one fifth of steel.

Comparison with carbon fiber product boards: Carbon fiber product sheets can be pasted on structural surfaces of various shapes, while plates are more suitable for regular component surfaces. In addition, because the amount and thickness of the underlying resin when pasting the board is larger than that of the sheet, the bonding strength at the interface with the concrete is not as good as the sheet.

Good thermal conductivity: Generally, inorganic and organic materials have poor thermal conductivity, but the thermal conductivity of carbon fiber products is close to that of steel. This advantage can be used as a solar collector material and a thermally conductive shell material with uniform heat transfer.

Small thermal expansion coefficient: The thermal expansion coefficient of most carbon fiber products is negative (-0.5~-1.6)×10-6/K indoors, zero at 200~400℃, and 1.5×10- when the temperature is less than 1000℃ 6/K. The expansion coefficient of the composite material made of it is naturally relatively stable and can be used as a standard weighing instrument. The two characteristics of raised damping and excellent sonar transmission can be used as structural materials of submarines, such as submarine sonar domes.

Good wear resistance: When carbon fiber products are rubbed against metal, they rarely wear. Carbon fiber products are used to replace asbestos to make high-grade friction materials, which have been used as brake pad materials for aircraft and cars.

Good high temperature resistance: Carbon fiber products are very stable below 400°C and do not change much even at 1000°C. The high-temperature resistance of composite materials mainly depends on the heat resistance of the matrix. The long-term heat resistance of resin-based composite materials is only about 300°C. The high-temperature resistance of ceramic-based, carbon-based and metal-based composite materials can match that of carbon fiber products themselves. Therefore, carbon fiber product composite materials are widely used in the aerospace industry as high temperature resistant materials.
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High X-ray transmittance: This feature has been exploited in medical equipment.

Chemical Properties

Good chemical corrosion resistance: It can be seen from the composition of carbon fiber products that it is almost pure carbon, and carbon is one of the strongest elements. In addition to strong oxidizing acids, it is very resistant to acids, alkalis and organic chemicals, and can be made into a variety of chemical preservative products. CNC Machining china company has been engaged in application research in this area. As the price of carbon fiber products continues to decline in the future, its application scope will become wider and wider.

The biggest difference between carbon fiber and metal materials is that carbon fiber is a non-metallic material, and its electrochemical activity is much lower than that of metal structural materials. environment, has excellent corrosion resistance and anti-aging properties, long service life.  

Carbon fiber needs to undergo ultra-high temperature carbonization in production, so the working temperature of carbon fiber itself is extremely high, which can reach 2000 ° C. In practical application, carbon fiber is usually fused with matrix structural materials such as resin, so the general long-term high-temperature working temperature of carbon fiber products is 150°C. The thermal expansion coefficient of carbon fiber composite material can ensure that the product basically will not deform with the change of working temperature, and the size is stable.  

China Be-cu Prototype Material Technology Co., Ltd. is a professional manufacturer of carbon fiber products, with a variety of advanced molding processes, with large hot presses, autoclaves, hydroforming tables, CNC high-speed milling machines and other machining equipment. A variety of carbon fiber products can be customized according to customer requirements.

ISO 9001 certified. BE-CU Prototype Offering CNC machining carbon fiber and other manufacturing services for carbon fiber marterial. Various capabilities include notching, labeling, drilling carbon fiber, grinding, laser cutting carbon fiber, finishing, plating, marking, CNC milling carbon fiber and turning carbon fiber.We stock high quality 3k carbon fiber sheet in a variety of thickness, types and finish. Its a great material used in applications where light weight and strength are needed such as drones. Unlike other workshops, we have no min order and are often filling orders with a single part. We also don’t make you pay for the full sheet and you only get charged for what is used. With a large selection of material, you should find everything you need to make your project come to life. We are also able to handle larger production runs and provide a competitive pricing. If we don’t have the material or finish you require, we are more the willing to look at bringing it in for you.

What Is Carbon Fiber?Carbon fiber is made of polyacrylonitrile (PAN) (or pitch, viscose) and other organic fibers by carbonization (removal of most elements except carbon) by pyrolysis method under inert gas at high temperature above 1,000 °C. Inorganic polymer fibers with a carbon content of more than 90%.