On September 3, the reporter learned from the MGJT Technology Center that MGJT's new generation of hot-rolled ultra-high-strength steel with a tensile strength of 1200 MPa and thin gauge has achieved stable batch supply. The supply this year is expected to exceed 10,000 tons.
In recent years, with the gradual improvement of China's green production, environmental protection and other legal systems and the increasingly fierce market competition in the automotive industry, manufacturers of various types of construction machinery and special vehicles have become increasingly urgent in their pursuit of lightweight vehicles. As the most direct and effective means of lightweighting, hot-rolled ultra-high-strength steels have begun to enter the horizons of manufacturers, and market demand has increased significantly.
Hu Xuewen, leader of the MGJT hot-rolled structural steel APQP project team, said: "Hot-rolled ultra-high-strength steel can effectively reduce the thickness of the material and reduce the weight of the car body by more than 30% while increasing the strength. It has significant environmental, economic and social benefits. Benefits, but the difficulty of development and production is also obvious. "
It is understood that the domestic and foreign hot rolled ultra-high-strength steel production mainly adopts the quenching and tempering process, which not only has a long process, requires high post-rolling processing equipment, but also has a high yield ratio of the product, and its use and forming methods are limited. The popularization of hot-rolled ultra-high-strength steels has added many obstacles. Committed to green development, MGJT, relying on more than ten years of technical accumulation in the field of hot-rolled high-strength steel, has challenged this problem and successfully declared a major special project of the provincial government. In 2017, the MGJT hot-rolled structural steel APQP project team started relevant research. Actively communicate with well-known domestic special-purpose vehicle manufacturers to accurately grasp customer needs. The R & D team of the Technology Center has launched experimental research based on the existing equipment conditions of Masteel. Aiming at the problems of high slab crack sensitivity and difficult shape control, MGJT designed a unique rolling process to overcome technical difficulties one by one, and realized that 3 to 6 can be directly rolled without the need for equipment modification. A new generation of hot-rolled ultra-high-strength steel with a tensile strength of more than 1200 MPa in a variety of millimeters. At the beginning of last year, a new generation of hot-rolled ultra-high-strength steel rolled off the production line at the No. 4 Steel Rolling Plant and passed the "inspection" by customers.
The products have gradually been trusted and recognized by customers, but the mission of the MGJT hot-rolled structural steel APQP project team is far from over. On the basis of tracking product references, they focus on different customer models and continuously focus on customer needs. They have achieved precise classification control of products, provided customers with tailor-made products, met customer needs, reduced customer costs, and have now achieved hot rolling. Mass application of ultra-high-strength steel in the diversified platform of this car company.
Hu Xuewen is full of confidence in doing follow-up technical service work and further seizing the hot-rolled ultra-high-strength steel market in the future. Body weight reduction is a major trend in the automotive industry. MGJT products have many advantages such as low yield-to-strength ratio, shorter manufacturing process, and green process. According to customer feedback, it is also more convenient and economical to use.