Transactions of Materials and Heat Treatment

Title：Research on high strength aluminum 7075 sheet for lightweight automobile based on thermal deep drawing technology

Authors： Cui Huali Wu Yuanyuan

Unit：（College of Information & Business Zhongyuan University of Technology Zhengzhou 451191 China）

KeyWords： high strength aluminum alloy thermal deep drawing limit drawing ratio microstructure lightweight

ClassificationCode：TG356

year,vol(issue):pagenumber：2018,43(5):0-0

Abstract：

The drawing abilities of aluminum 7075 sheet with thickness of 1 mm under different process conditions were compared by heating the internal die, and the drawing properties of high strength sheet under the condition of hot forming were studied. The results show that with the rising temperature, the drawing limit of high strength aluminum 7075 sheet continuously increases, and when temperature is up to 450 ℃, the limit drawing ratio gradually reduces. Therefore, optimal drawing limit of specimens is obtained at the temperature of 300400 ℃. Furthermore, the thermal deep drawing speed is set to 8.5 mm·s-1 in the forming process, and the maximum limit drawing ratio of 1.96 can be reached at the best forming temperature of 300400 ℃. Finally, the grain in the cylinder wall is significantly elongated by tensile stress, and only partial grains appear the phenomenon of elongation at the rounded area.

Funds：

河南省高等学校重点科研项目计划(16A460030)

作者简介：崔华丽（1980-）,女，硕士，讲师 Email：mpydjg2@126.com

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