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首页> 外文期刊>Metallurgia Italiana >Effects of different welding technologies on metallurgical anf mechanical properties of DP600 steel welded joints
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Effects of different welding technologies on metallurgical anf mechanical properties of DP600 steel welded joints

机译：不同焊接工艺对DP600钢焊接接头冶金力学性能的影响

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摘要

Considering the safety standards required in the automotive industry, dual phase (DP) steels have gained theirpopularity thanks to their higher tensile strength in conjunction with superior formability if compared to thesteel grades of similar yield strength. Such properties are related to their microstructure which consists of softductile ferrite matrix, strengthened by hard martensitic phase. It is well known that welding processes play an important role in the automotive industry. While theconventional arc-welding processes are well-established, flexible and easy to automate, high power densityprocesses guarantee low distortions, narrow fusion and heat affected zones. The performance evaluation of welded automotive components made in DP steels, with respect to durability orcrashworthiness, involves the quantification of the properties change of the welded joint. This work is aimed atevaluating the effects of three different welding technologies (GTAW, PAW, EBW) on DP600 steel properties. Inparticular, the soundness, the fusion and heat-affected zone microstructure, and the mechanical properties ofthe welded joints are analyzed and compared in detail.
机译：考虑到汽车行业所要求的安全标准，双相（DP）钢由于具有较高的抗拉强度和与同等屈服强度的钢种相比优越的可成形性而受到青睐。这些性质与它们的组织有关，该组织由软延性铁素体基体组成，并由硬质马氏体相强化。众所周知，焊接工艺在汽车工业中起着重要的作用。尽管常规的弧焊工艺已经建立，灵活且易于自动化，但是高功率密度工艺可确保低变形，狭窄的熔合和热影响区。就耐用性或耐撞性而言，由DP钢制成的焊接汽车部件的性能评估涉及对焊接接头性能变化的量化。这项工作旨在评估三种不同的焊接技术（GTAW，PAW，EBW）对DP600钢性能的影响。特别是对焊接接头的稳健性，熔合区和热影响区的微观结构以及力学性能进行了分析和比较。

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