Analysis of the Coating Delamination after Laser Beam Cutting

IF 1.6 Q4 ENGINEERING, MANUFACTURING Manufacturing Technology Pub Date : 2023-09-15 DOI:10.21062/mft.2023.070
Anna Mičietová, Miroslav Neslušan, Zuzana Florková, Mária Čilliková
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Abstract

This paper analyses surface after laser beam machining with respect of surface height irregularities, residual stress state as well as microstructure on the low alloyed steel S 235. Surface after laser beam machining is investigated due to its specific nature resulting into coating delamination. This coating delamination can be found especially in the regions in which component shape or/and curvature of the profile is altered. Especially the components corners suffer from the delamination due to exten-sive surface heating and presence of brittle oxides layer. The thickness of this oxides layer is hetero-geneous with respect of the component thickness as well as the component geometry. It was found the oxides layer is the thermally initiated process since in these regions the underlying matrix also exhibits the higher thickness of the heat affected zone and higher degree of the hardening expressed in term of HV0.1. Furthermore, also the compressive residual stresses exhibit higher amplitudes in the region remarkably affected by the thermal cycle.
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激光束切割后涂层分层分析
对低合金钢s235进行了激光加工后的表面高度不规则性、残余应力状态和显微组织分析。对激光加工后的表面由于其特殊的性质导致涂层分层进行了研究。这种涂层脱层现象尤其发生在部件形状或/和轮廓曲率发生改变的区域。特别是部件的角部,由于广泛的表面加热和脆性氧化物层的存在而发生分层。该氧化物层的厚度是不均匀的,就组件的厚度以及组件的几何形状。发现氧化物层是热引发的过程,因为在这些区域下的基体也表现出更高的热影响区厚度和更高的HV0.1表示的硬化程度。在受热循环影响较大的区域,残余压应力表现出较高的幅值。
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来源期刊
Manufacturing Technology
Manufacturing Technology Engineering-Industrial and Manufacturing Engineering
CiteScore
2.10
自引率
44.40%
发文量
65
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