Study of mechanical properties of the YL113 die casting surface and middle layer

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The YL113 die casting surface and middle layer are separated by machining and densities, porosities and mechanical properties of the YL113 die casting surface and middle layer are measured. Results show that the densities and mechanical properties of the total YL113 die casts are in between those of the YL113 die casting surface and middle layer and are identical to those of the YL113 die casting middle layer. The porosities of the die casting surface layer are smaller and fewer and its densities are bigger and mechanical properties are better than those of the middle layer. Effects of different die casting process parameters on the surface layer and the middle layer of die casting are different, of whom effects of the casting pressure and the biscuit thickness on them are most obvious. The densities and mechanical properties of the surface layers and the middle layers of die castings increase with increasing the casting pressures and the biscuit thicknesses. In addition, the effects of densities on the mechanical properties of the die casting middle layers are more obvious than those of the die casting surface layer.