Influence of Laser Cutting On Structural Changes in Metals

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Influence of Laser Cutting On Structural Changes in Metals

Popis výsledku v původním jazyce

The current level of engineering production requires applied materials meet the most demanding criteria, whether in terms of longevity, wear or economic. it is necessary to deal with the high demands on the processing of these materials made or produced by unconventional technologies, as conventional machining methods often no longer meet the requirements for speed and quality of processing. Laser technology is undoubtedly at the forefront of these technologies. However, one of the drawbacks of the laser is the thermal impact of the workpiece due to the concentrated energy of the radiation the resulting structural changes in the material, which may affect the physical properties of the material and, consequently, the product. The present paper deals with the question of laser machining of metallic materials with a focus on the possibility of formation and assessment of structural changes as a result of the absorption of thermal radiation. Due to the thermal conductivity of the metals, the high temperature at the cutting point extends into the material. The highest temperature is reached by the area closest to the cutting joint, which is why subsequent cooling leads to the most significant changes, with the possible formation of a martensitic, bainitic or pearlitic structure just in the vicinity of the cutting edge. For a detailed assessment of the heat-affected zone, experimental machining of selected technical materials was carried out and, based on hardness measurements; this area was further statistically evaluated. The published article addresses the fundamental problem of whether similarity can be found between different types of laser-machined materials.

Název v anglickém jazyce

Influence of Laser Cutting On Structural Changes in Metals

Popis výsledku anglicky

The current level of engineering production requires applied materials meet the most demanding criteria, whether in terms of longevity, wear or economic. it is necessary to deal with the high demands on the processing of these materials made or produced by unconventional technologies, as conventional machining methods often no longer meet the requirements for speed and quality of processing. Laser technology is undoubtedly at the forefront of these technologies. However, one of the drawbacks of the laser is the thermal impact of the workpiece due to the concentrated energy of the radiation the resulting structural changes in the material, which may affect the physical properties of the material and, consequently, the product. The present paper deals with the question of laser machining of metallic materials with a focus on the possibility of formation and assessment of structural changes as a result of the absorption of thermal radiation. Due to the thermal conductivity of the metals, the high temperature at the cutting point extends into the material. The highest temperature is reached by the area closest to the cutting joint, which is why subsequent cooling leads to the most significant changes, with the possible formation of a martensitic, bainitic or pearlitic structure just in the vicinity of the cutting edge. For a detailed assessment of the heat-affected zone, experimental machining of selected technical materials was carried out and, based on hardness measurements; this area was further statistically evaluated. The published article addresses the fundamental problem of whether similarity can be found between different types of laser-machined materials.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20301 - Mechanical engineering

Projekt

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Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů