Application of Shot Peening and Shot Blasting to Increase Hardness and Depth of Nitride Hardened Layer to the Modified H13 Steel as Die Casting Die Materials

Abstract:

In metal forming process by die casting method, nitriding plays an important role in increasing the surface hardness. The influence of shot peening and shot blasting to the modified. H13 tool steel before nitriding process has been studied. Nitriding has been done in a gas vacuum furnace, at temperature of 510°C for 5 hours. Shot peening was conducted by using steel balls with a pressure of 461 kPa. Shot blasting has been done after shot peening using SiC particles. Characterization of the sample surface before and after the variation process is focused on changing the microstructure, micro hardness distribution, depth and composition nitriding layer. It has been found that shot peening prior to nitriding increase the maximum surface hardness to 1196 HV and effective depth of diffusion layer to 72 μm. Meanwhile, the nitriding without any prior surface treatment produces a maximum hardness of HV 1101.4 with effective depth of diffusion layer of 54 μm. Shot peening prior to nitriding produces white layer thickness of 4.1 μm thicker compared to white layer developed in nitriding without shot peening which produces 3.7 μm. While on nitrided material without any preceded surface treatment did not reveal any white surface layer.

• Periodical: Advanced Materials Research (Volume 789)
• Pages: 313-319
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.789.313
• Online since: September 2013
• Authors: Myrna Ariati Mochtar, Rizki Aldila
• Keywords: AISI H13, Diffusion Layer, Nitriding, Shot Blasting, Shot Peening, White Layer

References

[1] S. S. Akhtar, A. F. M. Arif, B. S. Yilbas et al., Influence of Surface Preparation on the Kinetics of Controlled Gas-Nitrided AISI H13 Steels Used in Extrusion Dies, Journal of Materials Engineering and Performance, vol. 19, no. 3, pp.347-355, (2010).

DOI: 10.1007/s11665-009-9496-5

[2] S. Kikuchi, and J. Komotori, Effect of Fine Particle Peening Treatment prior to Nitriding on Fatigue Properties of AISI 4135 Steel, Journal of Solid Mechanics and Materials Engineering, vol. 2, no. 11, pp.1444-1450, (2008).

DOI: 10.1299/jmmp.2.1444

[3] G. H. Farrahi, and H. Ghadbeigi, An investigation into the effect of various surface treatments on fatigue life of a tool steel, Journal of Materials Processing Technology, vol. 174, no. 1-3, pp.318-324, (2006).

DOI: 10.1016/j.jmatprotec.2006.01.014

[4] M. Sean, and A. Fatemi, Influence of Surface Finish on Fatigue Behavior of Forged Steel Including Heating Method, Hardness, and Shot Cleaning Effects, FIERF, AISI, University of Toledo, (2011).

[5] K. Tosha, and K. Iida, Improvement of Surface Layer by Shot Peening and Grit Blasting, Journal of Materials Engineering and Performance, vol. 12, (2008).

[6] S. -H. Chang, S. -C. Lee, and T. -P. Tang, Effect of Shot Peening Treatment on Forging Die Life , Materials Transaction, vol. 49, no. 3, pp.619-623, (2008).

DOI: 10.2320/matertrans.mer2007622

[7] S. Kikuchi, and J. Komotori, Effect of Fine Particle Peening Treatment prior to Nitriding on Fatigue Properties of AISI 4135 Steel, Journal of Solid Mechanics and Materials Engineering, vol. 2, no. 11, pp.1444-1450, (2008).

DOI: 10.1299/jmmp.2.1444

[8] S. Volker, Characteristics of Surface Layers Produced by Shot Peening, Shot Peening, L. Wagner, ed., pp.145-157, Germany: Wiley-VCH, (2002).

DOI: 10.1002/3527606580.ch20

[9] G. H. Farrahi, and H. Ghadbeigi, An investigation into the effect of various surface treatments on fatigue life of a tool steel, Journal of Materials Processing Technology, vol. 174, no. 1-3, pp.318-324, (2006).

DOI: 10.1016/j.jmatprotec.2006.01.014

[10] Christopher M. K., J. Deere, W. Works et al, ASM Handbook, Vol. 4, Heat Treating, Methods of Measuring Case Depth in Steels 1991, p.1015.

[11] S. S. Akhtar, A. F. M. Arif, B. S. Yilbas et al., Influence of Surface Preparation on the Kinetics of Controlled Gas-Nitrided AISI H13 Steels Used in Extrusion Dies, Journal of Materials Engineering and Performance, vol. 19, no. 3, pp.347-355, (2010).

DOI: 10.1007/s11665-009-9496-5

[12] P. Tong, Surface and Coatings Technology, vol. 201, p.4957, 2008.