Surface condition, microstructure and microhardness of boronized layers produced on Vanadis-6 steel after modification by diode laser

Open access

Abstract

The paper presents the study results of surface condition, microstructure and microhardness of Vanadis-6 tool steel after diffusion boriding and laser modification by diode laser. As a result of diffusion boriding the layers consisted of two phases: FeB and Fe2B. A bright area under the continuous boronized layers was visible. This zone was probably rich in boron. As a result of laser surface modification of boronized layers, the microstructure composed of three zones: remelted zone, heat affected zone and the substrate was obtained. The microstructure of remelted zone consisted of boron-martensite eutectic. The depth of laser track (total thickness of remelted zone and heat affected zone) was dependent on laser parameters (laser beam power density and scanning laser beam velocity). The microhardness of laser remelting boronized layer in comparison with diffusion boronized layer was slightly lower. The presence of heat affected zone was advantageous, because it allowed to obtain a mild microhardness gradient between the layer and the substrate.

References

  • [1] Przybyłowicz K., Teoria i praktyka borowania stali. Wyd. Politechniki Świętokrzyskiej, Kielce, 2000.

  • [2] Pertek A., The Structure Formation and the Properties of Boronized Layers Obtained in Gaseous Boriding Process, Dissertation no. 365, Publishing House of Poznan University of Technology, Poznan, 2001.

  • [3] Uslu I., Comert H., Ipek M., Ozdemir O., Bindal C., Evaluation of borides formed on AISI P20 steel. Materials and Design, 28 (2007) 55 - 61.

  • [4] Calik A., Simsek M., Karakas M.S., Ucar N., Effect of boronizing on microhardness and wear resistance of steel AISI 1050 and chilled cast iron. Metal Science and Heat Treatment, 56 (2014) 89 - 92.

  • [5] Muhammad W., Boriding of high carbon high chromium cold work tool steel. IOP Conference Series: Materials Science and Engineering, 60 (2014) 1-6.

  • [6] Jurči P., Hudáková M., Diffusion boronizing of H11 hot work tool steel. J. Mater. Eng. Perform. 20 (2011) 1180-1187.

  • [7] Balandin Yu. A., Boronitriding of die steels in fluidized bed. Metal Science and Heat Treatment, 46 (2004) 385-387.

  • [8] Młynarczak A., Piasecki A.,Budowa i właściwości dyfuzyjnych warstw chromoborowanych wytwarzanych na stalach narzędziowych. Archiwum technologii Maszyn i Automatyzacji, 24 (2004) 173-184.

  • [9] Wierzchoń T., Bieliński P., Sikorski K., Formation and propierties of multicomponent and composite borided layers on steel. Surface and Coatings Technology, 73 (1995) 121-124.

  • [10] Pertek A., Kulka M., Microstructure and properties of composite (B+C) diffusion layers on low-carbon steel. Journal of Materials Science, 38 (2003) 269-273.

  • [11] Bartkowska A., Swadźba R., Popławski M., Bartkowski D.,Microstructure, microhardness, phase analysis and chemical composition of laser remelted FeB-Fe2B surface layers produced on Vanadis-6 steel. Optics & Laser Technology 86 (2016) 115-125.

  • [12] Gopalakrishnan P., Shankar P., Subba Rao R.V., Sundar M., Ramakrishnan S. S., Laser surface modification of Low Carbon Borided Steels. Scripta Materialia, 44 (2001) 707-712.

  • [13] Kusiński J., Lasery w inżynierii materiałowej. Wydawnictwo „Akapit”, Kraków (2000).

  • [14] Steen W.M.,Laser material processing-an overview. J. Opt. A: Pure Appl. Opt., 5 (2003) S3-S7.

  • [15] Bonek M., Dobrzański L.A., Hajduczek E., Klimpel A., Structure and properties of laser alloyed surface layers on the hot-work tool steel. Journal of Materials Processing Technology, 175 (2006) 45-54.

Journal Information

Metrics

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 39 39 27
PDF Downloads 8 8 5