Laser deposition of Metco 15E, Colmony 88 and VIM CRU 20 powders on cast iron and low carbon steel
Laser deposition of Metco 15E, Colmony 88 and VIM CRU 20 powders on cast iron and low carbon steel
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DOI：
10.1007/s00170-012-4478-4
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发表时间：
2013-06-01
影响因子：
3.4
通讯作者：
Karabegovic, Isak
中科院分区：
文献类型：
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作者：
Lestan, Zoran;Milfelner, Matjaz;Karabegovic, Isak
在工具工业中，经常需要修复损坏或磨损的部件，或在工具的功能表面上涂覆涂层。当沉积一种性质与基材性质大不相同的材料时，可能会出现诸如裂纹之类的困难。在本文中，我们研究了三种不同的粉末（Metco 15 E， Colmony 88和VIM CRU 20）在铸铁和低碳钢上的激光工程净成形（LENS (TM)）技术沉积。在不同的工艺参数下，沉积了最多四层的涂层。虽然大多数粘结剂本身质量良好，但有些涂层有许多裂纹。利用激光束对铸铁试样进行预热，以减少裂纹的产生。在预热过程中，试样表面被部分熔化以溶解石墨结核，而石墨结核往往是裂纹的起点。
In the tooling industry, there is often the need to repair damaged or worn out components, or to apply coatings on functional surfaces of tools. When depositing a material which properties are very different from the properties of the substrate material, difficulties, such as cracks, can occur. In this paper, we investigate the deposition of three different powders (Metco 15 E, Colmony 88 and VIM CRU 20) on cast irons and low carbon steel with the laser engineered net shaping (LENS (TM)) technology. Coatings with a maximum of four layers were deposited with different process parameters. Although most bonds itself were of good quality, some coatings had numerous cracks. Preheating of the cast iron samples with the laser beam was used to reduce the number of cracks. In the preheating process, the surface of samples was partially melted in order to dissolve graphite nodules which were often the starting point of cracks.