Effects of laser heat treatment of steel following diffusion chromizing

• Autorzy: Bauer I. , Paczkowska M.

Identyfikatory

DOI

10.5604/01.3001.0010.7032

• Języki publikacji: EN

Abstrakty

EN

Purpose: This paper presents the findings of a study of laser heat treatment of C45 steel following diffusion chromizing. The aim of the study was to assess the effect of laser heating of steel subjected on the microstructure of its surface layer. Design/methodology/approach: Diffusion chromizing was conducted at the temperature of 1050°C for 8 hours in a LABOTHERM LH15/14 laboratory furnace. A powder mixture of the following composition was used to produce the layer: Cr2O3 with an addition of Al, kaolin and an activator – ammonium chloride NH4Cl. Diffusion chromizing of C45 steel was followed by laser heat treatment with a dual diode TRUDISK 1000 laser device. The treatment was carried out in four variants with a laser beam of 400 to 900 W. The microstructure of the surface layer was assessed with a scanning electron microscope Tescan Vega 5135. Hardness tests were carried out by the Vickers method on crosswise microsections. The chemical composition of the diffusion layer was assessed by optical emission spectrometry. Findings: The results revealed the presence of a modified surface layer following laser heat treatment in each of the variants. Research limitations/implications: This study focuses on the effect of laser heating of C45 steel subjected to diffusion chromizing on the microstructure of its top layer. Presented research are the first step of the investigation of the surface layer of steel after diffusion chromizing and laser treatment. Next one will be consisted in detailed investigation of microstructure (phases identification) of the achieved surface layer using (among other methods) X-ray diffraction. Practical implications: Laser heat treatment of C45 steel after diffusion chromizing can be applied to parts of machines and devices used in various branches of industry exposed to tribological wear and corrosion. Originality/value: The results of the experiment were affected by the composition of the powder mixture and process parameters of the diffusion chromizing and the laser treatment.

Słowa kluczowe

EN

diffusion chromizing; laser heat treatment

PL

chromowanie dyfuzyjne; obróbka cieplna laserowa

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2017
• Tom: Vol. 83, nr 2
• Strony: 49--56
• Opis fizyczny: Bibliogr. 19 poz., rys., tab.

Twórcy

autor

Bauer I.

• Department of Materials and Machine Technology, Faculty of Technical Science, University of Warmia and Mazury in Olsztyn, ul. Michała Oczapowskiego 11, 10-719 Olsztyn, Poland

autor

Paczkowska M.

• Division of Motor Vehicles and Road Transport, Institute of Machines and Motor Vehicles, Faculty of Machines and Transportation Poznan University of Technology, ul. Piotrowo 3, 60-965 Poznań, Poland

Bibliografia

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• 19. PN-EN ISO 6507-1:2007: Metallic materials – Vickers hardness test. Part 1: Test method.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).