Investigation of the effects of laser power and gas pressure on the top and bottom HAZ widths in AISI 1040 steels

Authors : Mehmet Şükrü Adin
Pages : 163-175
Doi:10.53525/jster.1583593
View : 135 | Download : 65
Publication Date : 2024-12-21
Article Type : Research Paper
Abstract :In this research, AISI 1040 steels, which are extensively used in different manufacturing industries, were used as workpieces to better comprehend the influences of laser beam cutting parameters on workpieces. In this context, such parameters as laser power, gas pressure and cutting speed were established as variable parameters. In present research, unlike the investigations available in the literature, the workpieces that started to be cut in a straight line were stopped 3 mm before the end of the cutting process. Thus, it could be possible to both see and investigate the top and bottom HAZ (Heat Affected Zone) widths occurring just outside the workpieces. Within the scope of the research, especially the top and bottom HAZ widths occurring in workpieces cut with a different method were investigated. At the gas pressure of 0.7 Bar, considering the largest and smallest bottom HAZ width values, it was studied out that the largest bottom HAZ width value (9.23 mm) was 32.83% larger than the smallest bottom HAZ width value (6.95 mm). On the other side, considering the largest and smallest top HAZ width values, it was studied out that the largest top HAZ width value (5.33 mm) was 71.39% larger than the smallest top HAZ width value (3.11 mm). At 1.4 Bar gas pressure, considering the largest and smallest bottom HAZ width values, it was found that the largest bottom HAZ width value (11.47 mm) was 28.19% larger than the smallest bottom HAZ width value (8.95 mm). On the other side, considering the largest and smallest top HAZ width values, it was studied out that the largest top HAZ width value (6.79 mm) was 42.95% larger than the smallest top HAZ width value (4.75 mm). Additionally, considering the largest and smallest average HAZ width values based on gas pressure of 0.7 Bar and 1.4 Bar, it was found that the largest the average HAZ width values were 33.29% and 44.75% larger than the smallest the average HAZ width values, respectively.
Keywords : AISI 1040 steel, Fiber laser cutting, laser machining, Top and bottom HAZ widths, Kerf width

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