What are the uses of wear-resistant steel plates of different strengths?

The automobile industry often uses high-strength wear-resistant plates to reduce the quality and improve the safety of automobiles. However, a series of problems such as cracking and welding instability will also occur. Therefore, when using wear plates, wear plates with different functions should be used according to the structure used.

According to international research on ultra-light steel vehicles, steel plates with a yield strength in the range of 210-550MPa are called high-strength steel plates, and steel plates with a yield strength greater than 550MPa are called ultra-high-strength steel plates. According to the different strengthening mechanisms, high-strength steel plates Steel plates are divided into ordinary high-strength steel plates and advanced high-strength steel plates.

Among them, ordinary high-strength steel plates mainly include strength f steel, bake hardening steel, phosphorous steel, isotropic steel, carbon-manganese steel and high-strength low-alloy steel. Advanced high-strength steel plates mainly include dual-phase steel, complex-phase steel, transformation-induced plasticity steel, bainitic steel and martensitic steel.

Studies have shown that various types of high-strength steel plates have different uses due to their inherent characteristics. For example, the bake-hardened steel plate has the characteristics of being softer before stamping and forming, good shape stability and higher anti-sag performance after baking, which is especially suitable for punching outer cover parts of automobiles. Dual-phase steel and phase-change induced hope steel have the characteristics of high strength, high collision absorption energy and high fatigue resistance, and are suitable for stamping structural parts and safety parts.

The high-rise building steel has complex stress conditions, which require high safety and reliability, long service life, and ability to withstand the damage of a given seismic intensity. This determines that steel plates for high-rise building structures require certain special properties, mainly as follows:

(1) The damage that can withstand a certain earthquake force must be able to prevent spread and earthquake. For this reason, the steel plate must not only have sufficient tensile strength and yield strength, but also have a lower yield ratio.

(2) It must have good welding performance, so that there is no need for preheating before welding and no heat treatment after welding, so as to facilitate on-site welding, thereby reducing labor intensity and improving labor efficiency.

(3) It must have high plasticity and humanity, so that the steel plate has good mechanical properties.