Refinement performance and mechanism of an Al-50Si alloy

The investigation of continuous nucleation and refinement of primary Si in Al–30Si mushy zone

“…So it is deservedly essential for primary Si to improve the morphology, decrease the size and uniformize the distribution. Recently the microstructure of hypereutectic Al-Si alloys can be refined by refiner addition [6][7][8][9][10][11], melt vibration [12][13][14][15], pulse treatment [16], etc., among which phosphorus-containing refiner addition is widely applied in practice. Among all phosphorus-containing refiners, the Al-P master alloy developed these years is able to overcome the shortcomings of other phosphorus-containing refiners (Cu-P master alloy or phosphate salt) such as environmental pollution and instable refinement efficiency, etc., and now has obtained a good application [11].…”

A new technique to modify hypereutectic Al–24%Si alloys by a Si–P master alloy

“…the modifier addition is ahead of silicon addition in the production process of Al-Si alloy, the modification effect of Si-P exhibits very well. According to the literature [20], at high temperature, Si atoms diffused into the melt when Si-20%P master alloy was added into Al-50%Si melt, and some phosphorus atoms dissolved and reacted with aluminum. When the Si-P master alloy is added into Al melt, the silicon atoms firstly dissolve, and the diffusion of silicon atoms is accompanied by its dissolving process.…”

“…Many of studies have been carried out to further improve the phosphorus modification effect by adding Ti [18], B [19], or RE [15]. In our previous study, the modification effect of the newly developed Si-20%P on Al-50%Si has been studied [20], and the superheat temperature should be high. While during the present study, series of P-containing master alloys and their modification techniques are being investigated, for example, the Al-Si-P master alloys have been successfully applied in Al-Si alloys and Al-Mg-Si alloys [21].…”

Influence of Casting Conditions on Tribological Properties of A390.0 Alloy

“…Development of entirely new materials and production techniques would be very expensive, therefore studies on improvement of existing alloys, obtained by various technologies [4,5], are carried out. Thus, expansion of knowledge on the influence of history of manufacturing technology of Al casting alloys on tribological properties under industrial conditions seems rational.…”