Transactions of Materials and Heat Treatment

Title：Influence of galvanized layer on formability of hot-dipped galvanized sheet steel with different strength levels

Authors： Li Tao Wang Baochuan Yao Ye Zheng Xuebin Jin Ru

Unit： Shougang Research Institute of Technology

KeyWords： galvanized layer hot-dipped galvanized sheet steel mechanical properties formability

ClassificationCode：

year,vol(issue):pagenumber：2016,41(1):48-51

Abstract：

For the hot-dipped galvanized sheet steel CR3, CR340LA, CR590DP, CR780DP with different strength levels, the influence of galvanized layer on mechanical properties and limiting dome height were analyzed comparatively by uniaxial tensile test and limiting dome height test. The research results show that the difference between the formability of the galvanized layer and the uncoated substrate causes the different mechanical properties. When the formability of the uncoated substrate is higher than that of the galvanized layer, the strength of hot-dipped galvanized sheet steel increases, and values of elongation, n value, and r value decrease due to galvanized layer in existence, vice versa. The deformation ability of the hot-dipped galvanized sheet steel is not only related to its mechanical properties, but also to the contact state of the sheet metal and the die. Because of the existence of the galvanized layer, the friction of the contact surface becomes deterioration in forming, and the formability of the hot-dipped galvanized sheet is affected. As a result, the influence of the galvanized layer should be taken into consideration in the subsequent forming process design.

Funds：

李涛（1977-），男，博士研究生

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