Vol 7, No 3 (2016) > Metalurgy and Material Engineering >

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

Myrna Ariati, Dwi Marta Nurjaya, Didi Rooscote



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

Keywords: Die casting; Die soldering; Double shot peening; H13 steel; Nitriding

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