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Study of Selected Usable Properties of the Top Layers of Weld Overlays Produced by Laser Technology for Applications in the Power Industry

机译:激光技术应用激光技术焊接覆盖层顶层所选可用性的研究

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The paper presents the results of laboratory tests of test specimens produced by multi-layer laser padding alloy Stellit Co-6 powder on a substrate with heat-treated X22CrMoV12-1 alloy steel. Multilayer laser padding was performed on a TRUMPF TruLaser Cell 3008. The formed weld overlays surface was studied using an optical microscope. Selected usable properties, such as surface topography, microstructure, hardness and erosion resistance were studied. During the analysis, areas of cross-sections test specimens after multilayer laser padded, in the connection zone of the substrate material with weld overlay, no cracks and no discontinuities in weld overlay were found in the substrate. As a result of conducted experiments, regular, repetitive weld overlays with characteristic directional crystallization were obtained. A microstructure with different growth directions with respect to the surface of the substrate shaped coniferous dendrites was obtained. The hardness of the weld overlays was in the range from 420 to 620 HV0.1, and in the heat affected zone, in the range of 320 to 420 HV0.1. Significant increases in erosion resistance of the surface layer of Stellite type Co-6 weld overlay produced by laser in comparison with the parent material after hardening were found.
机译:本文介绍了通过多层激光填充合金Stellit Co-6粉末在具有热处理的X22Crmov12-1合金钢的基板上产生的试验标本的实验室试验结果。在TrumpF Trulast电池3008上进行多层激光填料。使用光学显微镜研究形成的焊接覆盖层。研究了所选的可用性,例如表面形貌,微观结构,硬度和抗腐蚀性。在分析期间,在具有焊接覆盖层的基板材料的连接区域中,在具有焊接覆盖的基板材料的连接区域中,在基板中发现了在基板上的连接区域中。由于进行实验,获得了具有特征定向结晶的规则的重复焊缝覆盖物。得到了相对于基板成形针叶树枝状树叶表面的不同生长方向的微观结构。焊缝覆盖的硬度在420至620hv0.1的范围内,并且在热影响区内,在320至420hv010的范围内。发现通过激光器产生的钝化型CO-6焊缝覆盖层表面层的侵蚀性显着增加,与母体材料进行了硬化后。

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