Research and development purpose and significance of hot galvanized sheet for high performance automobile

Research and development purpose and significance of hot galvanized sheet for high performance automobile

In the 21st century, iron and steel products will still be the most important and irreplaceable structural materials and functional materials with the largest output and the widest coverage in human society. The pace of structural adjustment of world metallurgical industry is accelerating, and the focus of production will be transferred from developed countries to developing countries. At present, our country is in the process of industrialization, the continuous, rapid development and industrial upgrading of all departments of national economy put forward higher requirements for the variety and quality of iron and steel products. Accelerated up the structural adjustment of our country metallurgical industry, will have the vital significance.

There are some gaps between the development of hot dip galvanized steel and the world level. Most of our country's existing hot-dip galvanizing production lines are backward in technology, high zinc consumption, low product output, poor product quality, high production cost, energy consumption and ineffective environmental protection measures, which often cause serious environmental pollution. Such production lines are difficult to meet the needs of soaring national economy. A small number of state-owned large iron and steel enterprises can produce high-quality household appliances and automobile hot galvanized sheet. Our country large scale continuous hot galvanized steel plate is mainly introduced from the United States, Japan, Europe at huge expense, general level, there is more similar level, repetitive, mature technology. There are more general products and similar products, less high, new and cutting-edge technologies, less products with high technology content, and less self-developed technologies. Core technologies cannot be fully mastered, and there is no ability to develop and produce new varieties. On the other hand, hot-dip galvanized technology and technology conversion rate are low in our country, difficult to form an industry. Results of low integration, and immature and incomplete complete technologies of the system are the crux of the realization of the engineering and the industrialization. These problems are mainly based on the production technology and equipment development ability of hot-dip galvanized steel plate for high-performance automobile in our country lags behind the advanced level in the world. Therefore, it is necessary to develop the production technology and equipment of hot dip galvanized steel sheet for high performance automobile. Strengthening the systematic integration of the results, promoting the transformation and application of the results, gradually increasing the self-sufficiency rate of high performance hot-dip galvanized automobile plate products in our country, promoting the progress and development of our technology in this field. Our steel plate continuous hot-dip galvanizing large modern unit is introduced from the United States, Japan, Europe and other countries, although its product is more similar, but the production technology has its features, make efforts to digest the characteristics of each unit of high technology, and for themselves, then the innovation is a significant work in the field of surface coating technology, which will speed up the gap between our country and foreign countries. Reduce repeated introduction, realize the system integration of high performance hot dip galvanized steel technology and equipment scientific research results, achieve the transformation and application of results, and push our technology to the world.

At present, the domestic production technology and equipment of hot galvanized steel plate for high performance automobile mainly rely on the introduction of foreign advanced technology. At present, only Baosteel has carried out some product-specific research on the production and development of automobile plate. Other enterprises that introduce hot galvanized steel plate production line for high performance automobile basically just produce and use. Failure to fundamentally digest and absorb and effectively develop and use innovation. Iron and Steel Research Institute as the earliest research unit into the field of continuous hot dipping steel strip, in the 1970s to assist Wuhan Iron and Steel to introduce the first domestic hot-dip galvanizing unit. During the following "Seventh Five-Year Plan" and "Eighth Five-Year Plan", the General Institute of Iron and Steel Research successfully completed the development and scientific research of Galfan and Gavalume alloy coatings. Subsequently, the General Institute of Iron and Steel Research carried out the localization work of continuous hot dip plating equipment of steel strip, and completed the localization of key equipment such as air knife, welding machine, submerged roll (Galvalume use) and gas purification device in collaboration with relevant domestic units. In recent years, the General Iron and Steel Research Institute has always adhered to the combination of advanced scientific research and development and practicability in these fields. It has successfully developed the regenerative reduction annealing furnace with combustion efficiency of more than 70%. Continuous hot dip Gavalume alloy plating technology for wide strip steel was developed and popularized. Regenerative folding reduction annealing furnace was designed and completed. The middle current density electrolytic degreasing technology is designed and developed, and the ZAM series products with the highest corrosion resistance abroad are closely tracked, and the pilot test is completed.

There is a small 100mm wide test unit in the General Iron and Steel Research Institute, in which GF, GL and hot plating Al-Si alloy coatings have been successfully developed. Iron and Steel Research Institute now has complete laboratory conditions, can be used for the test of hot-dip galvanized products.

At present, the development of hot galvanized sheet technology and equipment for high-performance automobile is still in a relatively weak state. The main domestic units involved in this field are mainly large iron and steel enterprise technology centers and some universities also carry out some exploratory or testing scientific research activities.