Study on Formability Characteristics of the Weld Seam of Aluminum Steel Tailored Hybrid Blanks
Study on Formability Characteristics of the Weld Seam of Aluminum Steel Tailored Hybrid Blanks
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铝钢拼焊混合板焊缝成形特性研究
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
M. Merklein
中科院分区：
文献类型：
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作者：
Ozan Singar;M. Merklein
拼焊板 (TWB) 的特点是在成型过程之前将具有不同材料质量和/或厚度的板材焊接在一起。 TWB在汽车工业中的应用带来了多种优势，例如减轻车身重量和制造成本，以及将多个拉深零件集成为一个零件。尽管存在多种已建立的拼焊板类型，但新版本已经出现：拼焊混合板 (THB)。目前的研究重点是采用 CMT 焊接技术连接的定制混合毛坯。本研究的主要目的是确定铝钢激光拼焊板的机械性能和成形性。覆盖不同厚度锌层的钢板（HX340LAD，0.8 毫米）与铝合金（AA6014-T4，1.2 毫米）相结合。为了确定材料特性并分析热影响区 (HAZ)，对焊缝进行了横向和纵向的显微硬度测量。结果表明硬度发生变化且热影响区非常小。拉伸试验（垂直于焊缝）和带有在线变形分析的中岛试验表明，主要形成发生在铝侧。
Tailor Welded Blanks (TWB) are characterized by the fact that sheets with different material qualities and/or thicknesses are welded together before the forming process. The application of TWBs in the automobile industry brings several advantages, such as the reduction of car body weight and manufacturing costs, as well as the integration of several drawing parts into one part. Despite several established tailor welded blanks types, a new version has emerged: The Tailored Hybrid Blanks (THB). The current investigation focuses on tailored hybrid blanks joined by the CMT-welding technology. The main aim of this study is to specify the mechanical properties as well as the formability of Aluminum Steel Tailored Blanks. Steel (HX340LAD, 0.8 mm) sheets covered by different zinc coat thicknesses were combined with an aluminum alloy (AA6014-T4, 1.2 mm). In order to determine the material properties and to analyze the Heat Affected Zone (HAZ), microhardness measurements were taken transversal and longitudinal to the weld line. Results indicate a change of hardness and a very small HAZ. Tensile tests (perpendicular to weld line) and Nakajima tests with online deformation analyses show that the main formation takes place on the aluminum side.