What parts of the car body need high strength steel plate

concept

The difference between high strength steel and ordinary steel is mainly that high strength steel has higher yield strength and tensile strength, starting from two basic concepts:

1 Strength: strength is divided into yield strength and tensile strength.

Simply put, yield strength is the strength at which a material begins to deform irretrievably and characterizes its ability to resist deformation. Tensile strength refers to the strength of the material when it is broken, which characterizes the ability of the material to resist damage. In general, the tensile strength is always greater than the yield strength.

2. Ductility: a physical quantity that represents the deformation ability of a material.

A simple measure is elongation, which is how much a material deforms before it starts to break. Cold-formed materials require a lot of deformation to make parts, so this amount is particularly important in cold-formed materials.

Ultra-high strength steel is used to protect passengers in the event of an accident. It is very important to protect the safety of car owners, so the selection of materials has become particularly important. When the yield strength exceeds 300Mpa, it can be called ultra-high strength steel plate. When the yield strength exceeds 1000Mpa, it is generally hot formed steel plate. Generally, AHSS are steels with yield strength higher than 550 MPa. Their unique low weight, high strength, and optimized formability allow automakers to use fewer materials, thus greatly reducing the weight of their vehicles. Front and rear anti-collision beams, door anti-collision beams, front and rear longerons, central passageways, seat beams, threshold longerons, roof beams, A-pillar reinforcement plates, B-pillar reinforcement plates and wind window column reinforcement plates are all made of high-strength materials. When a car crashes, the deformation of the front and rear of the body can effectively absorb the impact energy and reduce the deceleration of the human body when the accident occurs. At the same time, the crew cabin is solid and reliable to ensure the effective living space of the occupants.

species

There are usually two kinds of body steel plates: hot rolled and cold rolled. According to the added ingredients, the body steel plate can be roughly divided into carbon steel plate, high strength steel plate, special steel plate and so on.

application

The underbody, side inner panels (ABC columns) and roof beams have become the strongest body parts using ultra-high strength steel. The underside of the car, the place that never sees the light of day, the place that the average consumer will never notice, is also the intensity focus area.

The roof is made of high-strength steel. When the car rolls, the roof deformation is small. The ABC column is built on the door and is used to connect the roof to the bottom. The use of high-strength steel enhances the overall stiffness of the car and reduces the risk of side impact and injury to a certain extent. The strongest components are the car's A pillar, B pillar, floor access and side anti-collision steel beams. AB column, floor and side beam are the strongest parts of the car body, which are directly related to the safety of the driver and passengers in the cab.

Body longeron, front and rear anti-collision beam, C pillar strength next. The front longeron and C-pillar are very strong. The main function of this component is to absorb energy after the vehicle is impacted, and evenly distribute the force borne by the body. The front cover, the four doors and the trunk were the least strong.