CR850/1180DH high-formation dual-phase steel is a high-strength, high-formability dual-phase steel, which is composed of elements such as iron, carbon, silicon, and manganese, and at the same time, an appropriate amount of alloying elements such as chromium, nickel, and molybdenum has been added. Its main feature is its excellent stamping performance and welding performance, and it is widely used in the field of automobile manufacturing. In automobile production, this steel can be used to manufacture components such as body structure, chassis and suspension system, which helps to reduce the weight of the vehicle body and improve the safety performance and fuel economy of the vehicle.

What is the chemical composition of CR850/1180DH high forming dual phase steel?

Iron (Fe): About 78.5% of the total weight

Carbon (C): about 0.18% of the total weight

Silicon (Si): about 1.9% of the total weight

Manganese (Mn): about 1.6% of the total weight

Chromium (Cr): about 0.5% of the total weight

Nickel (Ni): about 0.5% of the total weight

Molybdenum (Mo): about 0.2% of the total weight

What are the mechanical properties of CR850/1180DH high forming dual phase steel?

Tensile strength: minimum 850 MPa, maximum 1180 MPa

Yield strength: minimum 850 MPa, maximum 1080 MPa

Elongation: minimum 10%

Reduction of area: minimum 40%

What are the advantages of CR850/1180DH high forming dual phase steel?

High strength: The tensile strength and yield strength of this steel are very high, ranging from 850 MPa to 1180 MPa. In automobile manufacturing, thinner steel plates can be used to manufacture parts, and the whole vehicle can be lightened while ensuring the strength. weight.

Excellent formability: The steel has excellent stamping formability, and can achieve precise forming even in complex shapes, and can be cut, bent, and deep drawn and reamed without breaking or cracking. This feature makes it easier for manufacturing workers to process it into compliant auto parts.

Good welding performance: The steel has excellent welding performance and can be processed by various welding methods without causing deformation or cracking during the welding process.

High corrosion resistance: Due to the addition of appropriate amount of alloying elements such as chromium and nickel, the steel has high corrosion resistance and can prolong the service life.

Environmental protection: Compared with traditional automotive steel, CR850/1180DH high-forming dual-phase steel can reduce the weight of the vehicle, reduce vehicle fuel consumption, reduce carbon dioxide emissions, and have better environmental protection performance.

What are the disadvantages of CR850/1180DH high forming dual phase steel?

Although CR850/1180DH high-forming dual-phase steel has many advantages in the field of automobile manufacturing, it also has the following disadvantages:

Higher cost: Compared with traditional automotive steel, the manufacturing cost of CR850/1180DH high-forming dual-phase steel is relatively high.

Difficulty in processing: The processing of this kind of steel is relatively difficult, and special equipment and processes are required for processing, otherwise problems such as cracks and breaks are prone to occur.

Low-temperature brittleness: At extremely low temperatures, the steel may become brittle and lose its original strength, thereby reducing the safety performance of the vehicle.

Welding methods are limited: Although the steel can be welded by a variety of welding methods, due to its special chemical composition and structural characteristics, it is necessary to select an appropriate welding method to ensure welding quality and performance.

Poor plasticity: The steel is not as malleable as some other steels, resulting in higher stamping forces and stricter process control when forming, which increases cost and manufacturing difficulty.

What is the manufacturing process of CR850/1180DH high forming dual phase steel?

Selection of raw materials: high-quality iron ore and other alloying elements are selected as raw materials, and mixed and proportioned according to a certain proportion.

Iron-making and smelting: the mixed raw materials are put into a blast furnace for smelting, and after multiple processes such as reduction, melting and separation, unprocessed molten iron containing a certain amount of carbon is produced.

Refining treatment: Refining unprocessed molten iron, including phosphorus removal, sulfur removal, deoxidation and other processes, to remove impurities and control its chemical composition.

Continuous casting: Pour the refined molten iron into the continuous casting machine for continuous casting, and obtain a billet with a certain thickness and width through measures such as cooling and stretching.

Hot rolling: the steel billet is heated to a higher temperature, and then rolled by a hot rolling mill to form a steel plate with a certain thickness and width.

Cold rolling: The hot-rolled steel plate is cold-rolled to further adjust its thickness and surface quality.

Heat treatment: heat treatment of the cold-rolled steel plate, including heating, heat preservation and cooling, to improve its structure and performance.

Surface treatment: cleaning, derusting, coating and other surface treatments are carried out on the heat-treated steel plate to improve its corrosion resistance and appearance quality.

What is the heat treatment process of CR850/1180DH high forming dual phase steel?

Heating: Put the steel plate to be processed into the heating furnace, and gradually increase the temperature until it reaches the desired temperature. This temperature is generally between 800°C and 950°C, depending on the chemical composition and use of the steel.

Insulation: Keep the steel plate at the required temperature in the heating furnace for a certain period of time to allow it to be fully homogenized. Holding times need to be precisely controlled based on factors such as steel thickness, chemical composition and required properties.

Cooling: The steel plate after heating and heat preservation is taken out of the heating furnace, and can be cooled in various ways according to different heat treatment process requirements. Such as air cooling, water quenching, etc.

Tempering: reheat the quenched steel, keep it at a certain temperature for a period of time, and then cool it down. This process helps to eliminate the stress and hardness generated during the quenching process, and improves the toughness and plasticity of the steel.

What is the use of CR850/1180DH high forming dual phase steel?

CR850/1180DH high-forming dual-phase steel has high strength and excellent formability, so it is widely used in the field of automobile manufacturing, including the following aspects:

Body structure: CR850/1180DH high-forming dual-phase steel can be used to manufacture automobile body structures, such as front longitudinal beams, rear longitudinal beams, side walls, roofs, etc. The steel can reduce the weight of components while ensuring sufficient strength, thereby improving the fuel economy and safety performance of the vehicle.

Chassis system: CR850/1180DH high-formed dual-phase steel can also be used to manufacture key components in the chassis system of automobiles, such as suspension arms, steering knuckles, wheel hubs, etc. These parts not only bear the weight of the car, but also resist the vibration and impact of the road surface, so they need to have high strength and toughness.

Exterior parts such as hood and doors: Since CR850/1180DH high-formed dual-phase steel has good surface quality and corrosion resistance, it can also be used to manufacture exterior parts of automobiles, such as hoods, doors, etc.

Other parts: In addition to the above applications, CR850/1180DH high-forming dual-phase steel can also be used to manufacture other parts of automobiles, such as braking systems and transmission systems.

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If you are looking for a steel with high performance, high strength, good plasticity and environmental protection, then our company’s CR850/1180DH high-forming dual-phase steel is definitely your best choice!

Our CR850/1180DH high-formation dual-phase steel is produced using advanced manufacturing processes and high-quality raw materials, featuring excellent formability and high strength. Compared with traditional steel, this material can greatly reduce the weight of the vehicle, improve the fuel economy of the vehicle and reduce carbon emissions.

In addition, our CR850/1180DH high-forming dual-phase steel also has excellent corrosion resistance, which can prolong the service life, and is excellent in processing and welding. Our products have been successfully applied to many automobile manufacturers, and have been highly appraised and trusted by customers from all walks of life.