Selected Properties of the Surface Layer of C45 Steel Parts Subjected to Laser Cutting and Ball Burnishing

In this article, we report the results of experimental studies on the impact of ball burnishing parameters on the roughness, microstructure and microhardness of the surface layer of laser-cut C45 steel parts. We also analysed the distribution of residual stresses generated in the surface layer of th...

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Main Authors: Agnieszka Skoczylas, Kazimierz Zaleski
Format: Article
Language:English
Published: MDPI AG 2020-08-01
Series:Materials
Subjects:
Online Access:https://www.mdpi.com/1996-1944/13/15/3429
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author Agnieszka Skoczylas
Kazimierz Zaleski
author_facet Agnieszka Skoczylas
Kazimierz Zaleski
author_sort Agnieszka Skoczylas
collection DOAJ
description In this article, we report the results of experimental studies on the impact of ball burnishing parameters on the roughness, microstructure and microhardness of the surface layer of laser-cut C45 steel parts. We also analysed the distribution of residual stresses generated in the surface layer of these parts. Laser-cut parts often require finishing to improve the quality of their surface. The tests performed in this study were aimed at assessing whether ball burnishing could be used as a finishing operation for parts of this type. Ball burnishing tests were performed on an FV-580a vertical machining centre using a mechanically controlled burnishing tool. The following parameters were varied during the ball burnishing tests: burnishing force <i>F<sub>n</sub></i>, path interval <i>f<sub>w</sub></i> and the diameter of the burnishing ball <i>d<sub>n</sub></i>. Ball burnishing of laser-cut C45 steel parts reduced the surface roughness parameters <i>Sa</i> and <i>Sz</i> by up to 60% in relation to the values obtained after laser cutting. Finish machining also led to the reorganization of the geometric structure of the surface, resulting in an increase in the absolute value of skewness <i>Ssk</i>. This was accompanied by an increment in microhardness (maximum microhardness increment was Δ<i>HV</i> = 95 HV0.05, and the thickness of the hardened layer was <i>g<sub>h</sub></i> = 40 µm) and formation of compressive residual stresses in the surface layer.
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spelling doaj.art-c1c3157927eb4b90bb2f45f598b9d2f72023-11-20T08:59:49ZengMDPI AGMaterials1996-19442020-08-011315342910.3390/ma13153429Selected Properties of the Surface Layer of C45 Steel Parts Subjected to Laser Cutting and Ball BurnishingAgnieszka Skoczylas0Kazimierz Zaleski1Department of Production Engineering, Faculty of Mechanical Engineering, Lublin University of Technology, 36 Nadbystrzycka, 20-618 Lublin, PolandDepartment of Production Engineering, Faculty of Mechanical Engineering, Lublin University of Technology, 36 Nadbystrzycka, 20-618 Lublin, PolandIn this article, we report the results of experimental studies on the impact of ball burnishing parameters on the roughness, microstructure and microhardness of the surface layer of laser-cut C45 steel parts. We also analysed the distribution of residual stresses generated in the surface layer of these parts. Laser-cut parts often require finishing to improve the quality of their surface. The tests performed in this study were aimed at assessing whether ball burnishing could be used as a finishing operation for parts of this type. Ball burnishing tests were performed on an FV-580a vertical machining centre using a mechanically controlled burnishing tool. The following parameters were varied during the ball burnishing tests: burnishing force <i>F<sub>n</sub></i>, path interval <i>f<sub>w</sub></i> and the diameter of the burnishing ball <i>d<sub>n</sub></i>. Ball burnishing of laser-cut C45 steel parts reduced the surface roughness parameters <i>Sa</i> and <i>Sz</i> by up to 60% in relation to the values obtained after laser cutting. Finish machining also led to the reorganization of the geometric structure of the surface, resulting in an increase in the absolute value of skewness <i>Ssk</i>. This was accompanied by an increment in microhardness (maximum microhardness increment was Δ<i>HV</i> = 95 HV0.05, and the thickness of the hardened layer was <i>g<sub>h</sub></i> = 40 µm) and formation of compressive residual stresses in the surface layer.https://www.mdpi.com/1996-1944/13/15/3429laser cuttingball burnishing surface roughnessmicrostructuremicrohardnessresidual stress
spellingShingle Agnieszka Skoczylas
Kazimierz Zaleski
Selected Properties of the Surface Layer of C45 Steel Parts Subjected to Laser Cutting and Ball Burnishing
Materials
laser cutting
ball burnishing surface roughness
microstructure
microhardness
residual stress
title Selected Properties of the Surface Layer of C45 Steel Parts Subjected to Laser Cutting and Ball Burnishing
title_full Selected Properties of the Surface Layer of C45 Steel Parts Subjected to Laser Cutting and Ball Burnishing
title_fullStr Selected Properties of the Surface Layer of C45 Steel Parts Subjected to Laser Cutting and Ball Burnishing
title_full_unstemmed Selected Properties of the Surface Layer of C45 Steel Parts Subjected to Laser Cutting and Ball Burnishing
title_short Selected Properties of the Surface Layer of C45 Steel Parts Subjected to Laser Cutting and Ball Burnishing
title_sort selected properties of the surface layer of c45 steel parts subjected to laser cutting and ball burnishing
topic laser cutting
ball burnishing surface roughness
microstructure
microhardness
residual stress
url https://www.mdpi.com/1996-1944/13/15/3429
work_keys_str_mv AT agnieszkaskoczylas selectedpropertiesofthesurfacelayerofc45steelpartssubjectedtolasercuttingandballburnishing
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