Manufacturing and Application of Baotsteel’s High Strength Steel Sheets for Automobiles

Li Jun
Baoshan Iron and Steel Company

The rapid economic growth and improvement of people’s living standard result in the fast development of automobile industry in China. With the increasing of automobile tenure quantity in China, problems such as traffic safety and fuel supply are appearing, therefore, more and more people begin to pay high attention to automobile’s weight reduction, fuel saving, safety and environment protection. Since the application of high strength steel sheets for automobiles can contribute a lot to the solving of above problems, Baosteel, which manufactures high strength steel sheets for automobiles as the main supplier, has invested a lot in the production and application of high strength steel sheets. At the same time, Baosteel has made great progress on it.

In this paper, Baosteel’s development of high strength steel sheets for automobiles and relevant studies on customers’ application technique in the recent years are introduced in detail, including the following three aspects: First, Baosteel’s successfully developed high strength steel sheets’ varieties, strength grades, output and application status in the automobiles. Second, Baosteel’s research in punch forming, welding, painting and assembling of the steel sheets for automobiles. Third, the analysis of Baosteel’s main issues during manufacturing and using high strength steel sheets for automobiles and the countermeasures for those issues. At last, Baosteel’s development perspective for the future on manufacturing technology progress and recent equipments improvement for high strength steel sheets for automobiles is also presented, including base situation of Baosteel’s new projects – 3rd hot mill unit (1880mm) and 5th cold mill unit (1750mm) which will be put into production recently and whose production are mainly high strength steel sheets for automobile.

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