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首页> 外文期刊>ISIJ international >Fusion Zone Microstructural Evolution of Al-10% Si Coated Hot Stamping Steel during Laser Welding
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Fusion Zone Microstructural Evolution of Al-10% Si Coated Hot Stamping Steel during Laser Welding

机译：激光焊接过程中Al-10％Si涂层热冲压钢的熔合区组织演变

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摘要

Fusion zone microstructural evolution of Al-10% Si coated hot stamping steel during laser welding and its mechanical properties were investigated in this study. During laser welding, a liquidized Al-10% Si coating penetrated along the fusion boundary to form δ -ferrite. After hot stamping heat treatment, the final microstructure was composed of a martensite-ferrite dual phase. The dual phase formation causes mixed mode fracture (brittle fracture + ductile fracture) at the fusion zone due to the hardness difference between the martensite and ferrite phases. This issue can be addressed by applying filler wire or by changing the coating system from an Al-based coating to a Zn-based coating.
机译：研究了Al-10％Si涂层热冲压钢在激光焊接过程中的熔合区组织演变及其力学性能。在激光焊接过程中，液化的Al-10％Si涂层沿熔合边界渗透，形成δ-铁氧体。经过热冲压热处理后，最终的显微组织由马氏体-铁素体双相组成。由于马氏体和铁素体相之间的硬度差，双相形成在熔合区引起混合模式断裂（脆性断裂+韧性断裂）。此问题可以通过应用填充焊丝或将涂层系统从Al基涂层更改为Zn基涂层来解决。

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