CR480/950TW+Z steel is a twin-induced plasticity steel with high strength, high toughness, good weldability and excellent corrosion resistance. The main component of the steel is low-carbon steel, and a small amount of alloying elements such as Nb and Ti are added to promote the formation of fine grains and twin structure in the steel, thereby improving the strength and toughness of the steel.

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What is the chemical composition of CR480/950TW+Z steel?

Carbon (C): 0.12%-0.22%

Silicon (Si): 0.20%-0.60%

Manganese (Mn): 1.00%-2.00%

Phosphorus (P): no more than 0.030%

Sulfur (S): no more than 0.025%

Chromium (Cr): no more than 0.40%

Copper (Cu): no more than 0.50%

Aluminum (Al): no more than 0.015%

Titanium (Ti): no more than 0.20%

Vanadium (V): no more than 0.20%

A small amount of other elements, such as nickel (Ni), molybdenum (Mo), niobium (Nb), etc.

What is the twin-induced plasticity mechanism of CR480/950TW+Z steel?

CR480/950TW+Z steel is a twinning induced plasticity (TRIP) steel, which has a special microstructure and plastic mechanism, which can provide excellent strength and ductility.

The twinning-induced plasticity mechanism of TRIP steel mainly involves the austenite and bainite phases in the steel. During the processing of TRIP steel, by controlling the chemical composition and heat treatment process of the steel, a certain amount of austenite phase can be formed, while a certain amount of bainite phase is also retained.

When the steel is subjected to external stress, the austenite phase will undergo a phase transformation into a more ductile bainite phase. During this process, the local strain of the steel is increased, thereby improving the overall plasticity of the steel. This phenomenon is called twin-induced plasticity.

What are the application fields of CR480/950TW+Z steel?

Since CR480/950TW+Z steel has excellent strength, plasticity and corrosion resistance, it is widely used in various industrial fields. The following are some common application areas:

Automobile manufacturing: CR480/950TW+Z steel can be used in the manufacture of automobile body parts, doors, roofs and other parts. Its high strength and excellent impact ability can effectively improve the safety performance of the car.

Construction industry: CR480/950TW+Z steel can be used in the manufacture of frame structures, ceilings, partition walls, doors and windows of buildings. Its high strength and corrosion resistance can improve the durability and stability of buildings.

Shipbuilding: CR480/950TW+Z steel can be used in the manufacture of hull structures, decks, marine equipment and other parts. Its high strength and excellent corrosion resistance can improve the safety and life of the ship.

Machinery manufacturing: CR480/950TW+Z steel can be used in the manufacture of structural parts, bearings, gears and other parts of mechanical equipment. Its high strength and good mechanical properties can improve the working efficiency and reliability of mechanical equipment.

Other fields: CR480/950TW+Z steel can also be used in the manufacture of pressure vessels, oil and gas pipelines, railway vehicles and other fields.

What are the properties of CR480/950TW+Z steel?

CR480/950TW+Z steel is a kind of TRIP steel, its mechanical properties and physical properties are as follows:

Mechanical behavior:

Tensile strength (σb): ≥ 480 MPa

Yield strength (σs): ≥ 950 MPa

Elongation (δ): ≥ 20%

Reduction of area (ψ): ≥ 60%

Impact toughness (AKV): ≥ 40 J

Physical properties:

Density: Approx. 7.85 g/cm³

Coefficient of thermal expansion: 12 × 10⁻⁶/K

Thermal conductivity: 50 W/(m·K)

Conductivity: about 16 MS/m

Is CR480/950TW+Z galvanized steel?

Yes, CR480/950TW+Z steel is also commonly called galvanized steel, where “Z” means that the surface of the steel has been hot-dip galvanized. Hot-dip galvanizing is a common anti-corrosion treatment method. By immersing steel in molten zinc liquid, a zinc-iron alloy layer is formed on the surface of the steel, thereby effectively preventing the steel from being oxidized and corroded.

What is the heat treatment process of CR480/950TW+Z steel?

CR480/950TW+Z steel is a kind of TRIP steel, and its heat treatment process usually includes two steps of annealing and quenching, as follows:

Annealing: Heat CR480/950TW+Z steel to about 800°C, keep it warm for a period of time, and then slowly cool it to room temperature. This step can eliminate the stress inside the steel, improve its processing performance, and facilitate the subsequent quenching treatment.

Quenching: Rapidly heat the annealed CR480/950TW+Z steel to 850-950°C, keep it warm for a certain period of time, and then rapidly cool it to room temperature. This step can make the structure of the steel undergo phase transformation and form a twin structure, thereby improving its strength and plasticity.

It should be noted that the heat treatment process of CR480/950TW+Z steel needs to be adjusted according to the specific process requirements and the use of the steel. In addition, improper heat treatment conditions can also lead to steel performance degradation or defects such as cracks, so it is necessary to strictly control parameters such as temperature, time and cooling method during heat treatment.

What is the processing process of CR480/950TW+Z steel?

CR480/950TW+Z steel is a high-strength, high-toughness steel with good processability. In general, the processing of CR480/950TW+Z steel includes the following steps:

Cutting: The steel plate is cut using a strip cutter or a laser cutter. The cutting process needs to pay attention to parameters such as cutting speed and cutting thickness to avoid excessive heat and deformation.

Stamping: Use a punching machine to punch holes and shape steel plates. Due to the high strength of CR480/950TW+Z steel, it is necessary to select a suitable die during the stamping process and control parameters such as punching speed and punching force to avoid cracks or deformation.

Bending: The steel plate is bent using a plate bender or a roller press. During the bending process, it is necessary to control the surface quality of the steel plate to avoid defects such as cracks and deformation.

Welding: use arc welding, gas shielded welding and other methods to weld the steel plate. During the welding process, parameters such as welding temperature and welding speed need to be controlled to ensure welding quality.

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Our CR480/950TW+Z steel products adopt the most advanced production technology and strict quality control, which ensures the high quality and stability of the products. This product has excellent mechanical properties and heat treatment properties, and can meet customers’ requirements for high strength, high hardness and high wear resistance of various parts. In addition, our CR480/950TW+Z steel products also have good weldability and machinability, which is convenient for customers to carry out secondary processing and assembly.

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