Recently, the review results of the "Metallurgical Science and Technology Award" of the China Iron and Steel Industry Association and the China Institute of Metals in 2020 were announced. The "Key Technology and Industrial Application of Automotive Hot Stamping Materials and Parts" jointly developed by NBHL Precision Mold Technology Group and four units won The first prize of "2020 Metallurgical Science and Technology Award".
The "Metallurgical Science and Technology Award" is the highest science and technology award in the iron and steel industry officially approved by the Ministry of Science and Technology of the People's Republic of China. The promulgation of the "2020 Metallurgical Science and Technology Award" has inspired a large number of Chinese enterprises represented by NBHL to continue to make contributions to the metallurgical industry.
"Hot Stamping Technology" Brings Revolutionary Breakthrough
Steel is the foundation of the automobile industry, and hot-stamping high-strength steel is the basic material of the car body.
As the world's advanced forming technology, "hot stamping" allows parts to have a tensile strength of more than 1500MPa, which is twice that of ordinary high-strength steel. No more than 20 companies have mastered this technology in the world. The principle is to heat a high-strength boron alloy steel plate with a pressure of 500-600MPa at room temperature to 930℃, and then press and form it to obtain a finished product with a tensile strength of 1500PMa. Compared with cold stamping, hot stamping can greatly increase the stamping rate of parts, reduce the tonnage of stamping presses, and have the dual advantages of lightweight process and lightweight structure.
For a long time, "hot stamping technology" was monopolized by a few foreign companies.
In 2013, NBHL cooperated with General Motors, Baosteel, Shanghai Jiaotong University, and Shanghai University to start a joint research on hot stamping technology. Over the past five years, four major problems including materials, products, processes, and molds have been overcome, and finally a set of hot stamping technology with completely independent intellectual property rights has been mastered, which has changed the situation that China's auto hot stamping materials and molds are all dependent on imports.
"Thin" and "Strong" Perfectly reconcile the "contradictions" between safety and lightweight
The emergence of "hot stamping technology" has brought automobiles into the lightweight era. Since lightweight runs through the entire production process, it is difficult to achieve weight reduction, so a high-level factory has become a key factor in achieving lightweight.
In the GM Liuzhou Super Factory, hot stamping technology materials have been applied to all models of vehicles. With automated production lines and intelligent robots, hot stamping technology materials have been precisely shaped into various parts, leaving no excess "fat" to the vehicle. In the end, what came out of the workshop was not a simple car body, but a high-rigidity platform. It was the basis for building all vehicle performance, and the optimization of car body performance was also obvious: better power, better economy, and safety. Increase accordingly.
GMWL New Baojun RS-3, the proportion of high-strength steel in the entire vehicle reaches 57%, and the proportion of ultra-high-strength steel reaches more than 32%. The key collision area of the new Baojun RS-3 uses hot-formed steel with a strength of up to 1500MPa, which can withstand a top pressure of more than 4 times its own weight. Protection ability, with extremely high anti-intrusion ability and energy absorption ability.
Not limited to traditional fuel vehicles, "hot stamping technology" has a higher application value in the field of new energy vehicles. As the first new energy pure electric vehicle of GMWL New Baojun, the body of New Baojun E300 uses more than 80% of ultra-high-strength and high-strength steel to provide comprehensive protection for key parts such as power battery packaging and anti-collision parts. The higher the body strength, the better the safety and handling, and the overall NVH performance will be better. On this basis, the new Baojun E300 is equipped with the new Baojun Internet of Vehicles, and the response speed is 20 times faster than that of traditional vehicles.