Aluminum-silicon-coated hot stamping steel is an important high-strength automotive steel, which is mainly used in safety structural parts such as B-pillars and A-pillars of automobiles.
The use of aluminum-silicon-coated hot stamping steel to replace low-strength steel can reduce the thickness of the steel plate, reduce the weight of the vehicle, and achieve energy saving and emission reduction. With the continuous improvement of automobile safety and environmental protection requirements, the proportion of aluminum-silicon-coated hot stamping steel in automobiles is also increasing.
Al-Si coated hot stamping steel was invented by ArcelorMittal, a European steel company.
The annual demand for aluminum-silicon-coated hot-stamped steel is about 4 million tons, accounting for about 20% of automotive steel. Due to the exclusive monopoly of ArcelorMittal, other companies producing aluminum-silicon coated hot-stamped steel need to submit to Ansai. LeMittal pays royalties.
Al-Si-coated hot stamping steel has many advantages, but it has disadvantages such as insufficient toughness and delayed cracking.
To this end, China's leading material technology company: SZYC Advanced Materials Technology Corporation has carried out atomic-level research and development, discovered the physical mechanism of carbon-enriched brittleness between the hot-stamped steel aluminum-silicon coating and the steel matrix interface, and developed the interface carbon reduction and toughening technology. , invented various related technologies in the manufacturing process, and produced high-toughness aluminum-silicon-coated hot stamping steel.
SZYC solves the two major problems of insufficient toughness and delayed cracking of hot stamping steel for the first time in the world. It not only breaks ArcelorMittal's exclusive monopoly on hot stamping steel with Al-Si coating, but also improves the performance of hot stamping steel with Al-Si coating.
According to German standards, SZYC's technology is the only aluminum-silicon-coated hot stamping steel technology in the world that can achieve a 65-degree bending angle.
Experiments have proved that the toughness of parts manufactured by SZYC technology is increased by 20%, the collision performance is improved by 28%, and the risk of delayed cracking is greatly reduced.
SZYC technology reduces the Al-Si coating of hot stamped steel from 25 microns to 10 microns, which not only reduces energy consumption, but also saves costs.
SZYC also provides high-stress spring technology for Yutong Bus. The products SZYC is developing include the world's highest strength armor steel, low-density bearing steel, high thermal conductivity die steel, large-size wear-resistant steel, super stainless steel, etc.