The first 450-ton thin-gauge Hot-rolled FB590 high-expanded steel jointly developed by HGTG Group, a Chinese high-strength thin-plate hot-formed automotive steel manufacturer, and a subsidiary of the internationally renowned auto parts company Bentler Group. Hot-rolled FB590 with high strength, high ductility and high formability is a ferrite-bainite high strength steel (AHSS) This product is made into automobile sub-frame products after downstream users' stamping, reaming, welding and assembly processes, etc. Ford China SUV and other models.
The sub-frame serves to support the front and rear axles and suspension system, so that the axle and suspension system are connected to the "positive frame" through it. At the same time, it can also block vibration and noise and play a role in reducing noise.
Based on the consideration of light weight and safety performance of the car body, the HGTG Group and the Bentler Group companies have jointly developed a new sub-frame beam project, redesigned the sub-frame beam structure and material characteristics, so that it can reduce shock and noise In terms of advantages. The newly designed sub-frame beam puts forward higher requirements on the hot-rolled pickling raw materials in terms of finished product shape, thickness uniformity, punchability and hole expansion.
The hot-rolled sheet research team of the HGTG Technology Center, the marketing department, and the coil marketing center fully discussed the user needs, and worked with senior experts in the hot-rolled production line to take advantage of the multi-stage laminar cooling control of the 1580 hot-rolled production line of the HGTG stainless steel company, and successfully produced To produce high-expanded steel that meets the requirements, the expansion rate of the finished product is as high as 97%, which is 50% higher than other high-strength steel products.
Another News
On October 10, 2018, the world's first volume of 2000Mpa (Mpa) hot-formed automotive steel was successfully rolled out of the HGTG Special Steel Group's thin slab short process. This is currently the highest strength steel grade produced by the global thin slab continuous casting and rolling process, which fills the gap between the international and domestic thin slab continuous casting and rolling processes to produce ultra-high strength steel.
Hot formed steel is currently the highest strength steel grade for commercial applications in automobiles, and the 2000MPa product is the highest strength level of the series. Compared with the commonly used 1500MPa grade hot-formed steel, the parts can be reduced in weight by 10% to 15%. With the development of automobiles towards light weight, safety, energy conservation and environmental protection, the demand for ultra-high-strength automotive steel with cost economy is more urgent. With its excellent formability, ultra-high post-forming strength and low cost, hot-formed steel has become the first choice for ultra-high-strength materials of major automobile manufacturers.
The short process represented by the thin slab continuous casting and rolling process has the characteristics of high production efficiency and low energy consumption. With the gradual maturity of production technology, it has been rapidly developed and widely recognized at home and abroad, and product development is also aimed at the automotive industry. Expanding from low-carbon steel to high-strength steel, it has realized "replacement of heat with heat" in many varieties and series (thin specification hot-rolled pickling products directly replace cold-rolled annealing products).
After the 1810 thin slab continuous casting and rolling production line of HGTG Special Steel Group was put into production, it has accumulated rich experience in process technology research and high-end variety development for many years, and continues to carry out innovative research. For the development of 2000MPa hot-formed steel, HGTG Special Steel Group, based on the successful production of conventional steel slabs, from process design, composition optimization and precise control, process temperature matching, continuous casting mold flux optimization and process parameter formulation, thin Full research and preparation have been carried out to improve the rolling stability of specifications and surface quality control, etc., solving the problems of steelmaking, continuous casting and thin gauge rolling that limit the development of hot forming steel on the thin slab production line, and successfully achieved 1.8 mm's 2000MPa hot forming steel has the ability to replace the traditional hot continuous rolling followed by cold rolling and annealing production processes. The development of this product marks that the production capacity of HGTG Special Steel Group's thin slab hot forming steel has been increased from 1500MPa to 2000MPa, and has the industrial production capacity of 1.8mm thickness slab.