Carbon structural high-strength steel is a class of advanced structural steel with excellent mechanical properties and heat treatment properties. It is composed of carbon and other elements (such as manganese, silicon, chromium, etc.), of which the carbon content is usually between 0.2% and 0.5%, which is also one of the main differences from ordinary steel. Carbon can increase the hardness and strength of steel, and at the same time improve the wear resistance, corrosion resistance and toughness of steel. Compared with traditional low-alloy steel, carbon structural high-strength steel also has better weldability, processability and thermal deformation performance.

Carbon structural high-strength steel is widely used in automobiles, aerospace, machinery manufacturing, construction engineering, petrochemical and other fields to meet the requirements for high strength, light weight and safety performance of materials.

What is the chemical composition of B280VK carbon structural high strength steel?

The chemical composition of B280VK carbon structural high-strength steel mainly includes:

Carbon (C): 0.27%～0.33%

Silicon (Si): ≤0.60%

Manganese (Mn): 1.20%～1.50%

Phosphorus (P): ≤0.030%

Sulfur (S): ≤0.025%

Chromium (Cr): ≤0.30%

Nylon (Ni): ≤0.30%

Vanadium (V): 0.08%～0.15%

In addition, B280VK steel may also contain trace elements such as copper, molybdenum, and aluminum. The content and ratio of these elements can be adjusted according to the specific production process and requirements.

What are the mechanical properties of B280VK carbon structural high strength steel?

The mechanical properties of B280VK carbon structural high-strength steel are as follows:

Tensile strength (σb): ≥ 280 MPa

Yield strength (σs): ≥ 280 MPa

Elongation (δ5): ≥ 22%

Neck shrinkage rate (ψ): ≥ 50%

Reduction of area (ψ%): ≥ 70%

B280VK steel has high yield strength and tensile strength, and its strength can be increased by more than 30% compared with ordinary low alloy steel. At the same time, the plasticity and toughness of B280VK steel are also very good, with high elongation and necking ratio, which makes it suitable for applications working under high strain conditions, such as stamping parts, welding in automobile and machinery manufacturing structure etc.

A What are the physical properties of B280VK carbon structural high-strength steel?

The physical properties of B280VK carbon structural high-strength steel are as follows:

Density: 7.85 g/cm3
Coefficient of thermal expansion: 11.2×10^-6/°C (20~100°C)
Thermal conductivity: 46.1 W/(m K)
Specific heat capacity: 0.45 kJ/(kg K)
Elastic modulus: 210 GPa
Compared with other conventional steels, B280VK steel has higher density and modulus of elasticity. At the same time, its thermal expansion coefficient, thermal conductivity and specific heat capacity are comparable to ordinary low alloy steel. These physical properties can help engineers consider the thermal properties, deformation characteristics and mechanical stiffness of materials in their designs.

What is the corrosion resistance of B280VK carbon structural high-strength steel?

The corrosion resistance of B280VK carbon structural high-strength steel is average, and its corrosion resistance mainly depends on the chemical composition, surface treatment and use environment of the material. Because B280VK steel contains less anti-corrosion elements such as chromium, its corrosion resistance is relatively weak, and it is prone to oxidation and rust in wet or acidic environments.

In order to improve the corrosion resistance of B280VK steel, some measures can be taken to protect the surface of the material before use, such as galvanizing, spraying anti-corrosion paint, spraying anti-rust agent and other methods can effectively prolong the life of the material. At the same time, care should also be taken to avoid exposure to harmful media and prolonged exposure to humid or corrosive environments during use.

What are the process characteristics of B280VK carbon structural high-strength steel?

The process characteristics of B280VK carbon structural high-strength steel are as follows:

Good heat treatment performance: B280VK steel has good heat treatment performance, and the required mechanical properties and structure can be obtained by controlling the heating temperature and cooling rate.

Good weldability: B280VK steel has good weldability, and can be welded by conventional welding techniques, such as arc welding, gas shielded welding, etc.

Easy to process and form: B280VK steel can be processed and formed by conventional machining processes (such as turning, milling, stamping, bending, etc.), and is suitable for manufacturing various complex shapes of parts and components.

High strength and light weight: B280VK steel has high strength and low specific gravity, so it can be used to manufacture products with light weight and high strength, such as automobile body and aircraft structure.

Wide adaptability: The physical properties and chemical composition of B280VK steel can be adjusted according to different use environments and needs, so it has wider adaptability.

How is B280VK carbon structural high-strength steel manufactured?

The manufacturing process of B280VK carbon structural high-strength steel can be divided into three stages: steelmaking, refining and rolling.

Steelmaking stage: The raw materials of B280VK steel are mainly pig iron, scrap steel and alloys, etc. These raw materials undergo reduction reaction at high temperature to remove impurities and impure substances to obtain high-purity molten steel.

Refining stage: change the structure and properties of steel by adding appropriate proportion of alloying elements and adjusting chemical composition. At the same time, in this process, the composition and properties of steel can be controlled by vacuum deoxidation, liquid steel tempering and softening treatment, etc., so as to meet different use requirements.

Rolling stage: After heat treatment processes such as quenching and tempering, the B280VK steel is processed into the required shape and size, such as plates, profiles, pipes, etc.

It should be noted that the manufacture of B280VK steel needs to determine its specific chemical composition and mechanical performance requirements, and design the corresponding production process according to these requirements. Throughout the manufacturing process, strict quality control is required for each link to ensure that the quality and performance of the final product meet the standard requirements.

What are the uses of B280VK carbon structural high-strength steel in automobile manufacturing?

B280VK carbon structural high-strength steel has a wide range of uses in automobile manufacturing, mainly including the following aspects:

Body structure: B280VK steel has the characteristics of high strength and light weight, and can be used to manufacture automobile body frames, doors, roofs, front and rear fenders and other parts.

Suspension system: B280VK steel can also be used to manufacture various parts of the automobile suspension system, such as suspension arms, shock absorber brackets, wheel skeletons, etc.

Engine components: The high strength and heat resistance of B280VK steel make it very suitable for the manufacture of engine components such as crankshafts, connecting rods, camshafts, etc.

Fuel system: B280VK steel can also be used to manufacture automotive fuel tanks, oil pipelines and other components, with good sealing and corrosion resistance.

In short, B280VK carbon structural high-strength steel has many uses in automobile manufacturing, which can improve the safety, comfort and economy of automobiles, and contribute to the sustainable development of the automobile industry.