The Effect of Double Shot Peening and Nitriding on the Die Soldering Behaviour of H13 and Cr-Mo-V Tool Steel

In this study, H13 tool steel and Cr-Mo-V steel were treated by two different types of surface treatments, i.e. double shot peening with nitriding and single shot peening. Samples were dipped into the molten aluminum alloy ADC12 as a simulation of the die casting process and held there for 0.5, 5, and 30 minutes. Several characteristics were analyzed, including surface hardness, microstructure observation, and identification of elements on the intermetallic layer formed. The results of the research showed that H13 steel treated by double shot peening with nitriding had higher surface hardness (1402 VHN) than when treated by shot peening only (536 VHN). A similar tendency emerged with the Cr-Mo-V steel, which had 1402 VHN and 503 VHN after treatment with double shot peening with nitriding and the single shot peening process. In addition, with a dipping time of 30 minutes, the H13 steel treated by double shot peening with nitriding produced a lower average thickness of the compact intermetallic layer. Moreover, double shot peening did not form a broken intermetallic layer, while single shot peening formed one (91.66 µm). Likewise, the Cr-Mo-V steel treated by double shot peening with nitriding produced a thinner compact intermetallic layer than single shot peening, 22.2 µm vs. 27.77 µm, as well as a lower average thickness of the broken intermetallic layer, 40.2 µm vs. 113 µm. This indicates that material treated by double shot peening with nitriding could minimize the occurrence of die soldering.

Die casting, Die soldering, Double shot peening, H13 steel, Nitriding

ASM Handbook Volume 5, 1994. Surface Engineering. ASM International, USA, pp. 278–279

ASM International, 1991. ASM Handbook Volume 4, Heat Treating, ASM International, USA, 1991, pp. 1544–1589

Han, Q., Viswanathan, S., 2003. Analysis of the Mechanism of Die Soldering in Aluminum Die Casting. Metallurgical and Material Transactions A,Volume 34(1), pp. 139–144

Hassani-Gangaraj, S.M., Moridi, A., Guagliano, M., Ghidini, A., Boniardi, M., 2014. The Effect of Nitriding, Severe Shot Peening and their Combination on the Fatigue Behavior and Micro-structure of a Low-alloy Steel. International Journal of Fatigue, Volume 62, pp. 67–76

Shankar, S., 2000. A Study of the Interface Reaction Mechanism between Molten Aluminum and Ferrous Die Materials. Doctoral Dissertation, WPI, Worcester, MA. pp. 1024–1026

Shankar, S., Apelian, D., 1999. Investigation of Die Soldering in Aluminum Die Casting, Progress Report. Aluminum Casting Research Laboratory, 99-3. MPI - WPI, Worcester, MA. Dec., pp. 456–469

Shankar, S., Apelian, D., 2002. Die Soldering: Mechanism of the Interface Reaction between Molten Aluminum Alloy and Tool Steel. Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science, Volume 33(3), pp. 465–476

Slima, S.B., 2012. Ion and Gas Nitriding Applied to Steel tool for Hot Work X38CrMoV5 Nitriding Type; Impact on the Wear Resistance. Journal of Materials Science and Applications, Volume 3, pp. 640–644

Suharno, B., Octapiani, N., Arifin, B., Harjanto, S., 2007. Pengaruh Waktu Kontak Terhadap Reaksi Antar Muka Paduan Aluminium 7% Si dan Aluminium 11%-Si dengan Baja Cetakan SKD 61. Makara Teknologi, Volume 11(2), pp. 85–91 (in Bahasa)

Tang, C., 2007. Soldering in Magnesium High Pressure Die Casting and its Prevention by Surface Engineering. Industrial Research Institute Swinburne, Swinburne University of Technology, Australia