한국주조공학회

Effect of iron and manganese contents on die soldering reaction has been studied in Al-9wt.%Si-0.3wt.%Mg alloy. Ternary αhcp-Al8Fe2Si and αbcc-Al8Fe2Si intermetallic compounds formed by interaction diffusion between Al-Si-Mg system alloy melt and SKD61 die steel surface. Thickness of soldering reaction layer in die steel surface decreased as Fe and Mn contents of the melts increased :When Fe content of Al-9wt.%Si-0.3wt.%Mg melts at constant 0.5wt%Mn content was 0.15wt.%, 0.45wt.% and 0.6wt.%, thickness of soldered layer of each alloy was 64.5 μm, 57.3 μm and 46.9 μm respectively. For Mn content of the alloy melts at constant 0.45wt.%Fe content was 0.30wt.%, 0.50wt.% and 0.70wt.%, thickness of soldered layer of each alloy was 66.1 μm, 57.3 μm and 48.3 μm respectively.

Al-Si casting alloys, SKD61 die steel, Die soldering, Thickness of soldering reaction layer, Fe/Mn contents.