Transactions of Materials and Heat Treatment

Title：Development trends of car body steels

Authors： Jiang Haomin Chen Xinping Cai Ning Zhu Xiaodong Bao Ping

Unit： Baoshan Iron & Steel Co. Ltd. State Key Laboratory of Development and Applicaton Technology of Automotive Steels (Baosteel)

KeyWords： car body steels high strength steel big data analysis aluminum alloy magnesium alloy

ClassificationCode：U465

year,vol(issue):pagenumber：2018,43(7):56-61

Abstract：

The car body materials for awarded models in Euro Car Body (ECB) Conference in recent ten years were analyzed by big data analysis in detail, and the development trends for car body steels were deduced and predicted under the “human” driving mode. However, high strength automotive steel is still the most suitable car body materials in the traditional fossilfueled vehicles and new energy vehicles due to the advantages of lower cost, higher safety, light weight, easy maintenance and environmental friendliness, and aluminum alloy, magnesium alloy and carbon fibers are the most important supplemental materials. According to the car body materials of the 2009-2017 ECB awarded models, the steel and aluminum applications change cyclically, and a seesaw relationship is presented. For the specific types of steel, the application of advanced high strength steel and hot forming steel keep increasing steadily, and the increase of the former is slightly bigger than that of the latter. In contrast, the applications of ordinary mild steel and high strength steel show a weak cyclical trend, and the increase trend in 2016 and 2017 results from the reduction of aluminum sheets and aluminum extrusion parts. Thus, before a major change in the way of driving, the future car body materials continue to change cyclically, but the change cycle is shorten and the variation amplitude is weaken. The usage of car body steels might remain at a dynamic balance ratio of about 70%.

Funds：

蒋浩民（1969-），男，博士，教授级高工，E-mail：hmjiang@baosteel.com；通讯作者:陈新平（1965-），女，硕士，教授级高工，E-mail：chenxp@baosteel.com

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