In this article, a 6 mm thick high-strength steel (HSS) was butt laser-MAG welded using nickel alloy wires as the cladding layer. By preparing the cladding layer on the groove, the microstructure and properties of the weld were adjusted. OM, XRD, SEM, and tensile and impact experiments were used to study the structure and mechanical properties of the welded joints. The results show that the weld structure with the cladding layer corresponds to austenite, while the microstructure of the conventional laser arc hybrid welded joint is a combination of austenite and martensite. Additionally, the tensile specimens of the welded joint are fractured at the weld. The fracture strength of the nickel alloy layer is 809 MPa, and the fracture strength of the conventional laser arc hybrid welded joint is 1149 MPa. The low temperature toughness (−40 °C) of conventional laser arc hybrid welded joint is 6.2J. The low temperature toughness (−40 °C) of prefabricated welded joints with laser-filled...

中文翻译：

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镍基合金熔覆层对高强度钢激光-MAG混合焊接接头强度和韧性的影响

在本文中，使用镍合金线作为覆层对6 mm厚的高强度钢（HSS）进行对接激光MAG焊接。通过在凹槽上制备覆层，可以调节焊缝的组织和性能。使用OM，XRD，SEM和拉伸和冲击实验来研究焊接接头的结构和力学性能。结果表明，具有熔覆层的焊缝组织与奥氏体相对应，而传统的激光电弧混合焊接接头的组织是奥氏体与马氏体的结合。另外，焊接接头的拉伸试样在焊缝处断裂。镍合金层的断裂强度为809MPa，传统的激光电弧混合焊接接头的断裂强度为1149MPa。传统激光电弧混合焊接接头的低温韧性（−40°C）为6.2J。激光焊接的预制焊接接头的低温韧性（−40°C）