Numerical Simulation Of Zirconium-based Amorphous Alloy Die-casting Process

The advantages of zirconium-based amorphous alloys such as excellent mechanical properties and low critical cooling rate make it have good industrial application prospects.However,due to the limitations of zirconium-based amorphous alloys in production size limitations and difficulties in machining at room temperature,zirconium-based amorphous alloys are difficult to popularize.As an advanced casting process,die-casting has the advantages of higher cooling rate and near net forming,which can better solve the shortcomings in industrial production.For the die-casting process of zirconium-based amorphous alloys,by setting the casting layout,die-casting parameter analysis and the influence of the casting cavity filling and solidification process,studying the impact of the composite material mold on the cooling rate,it is a zirconium die-casting for industrial production.The study of amorphous alloys provides theoretical guidance and data support.First,according to the casting geometry model,design the casting system and overall layout of the die-casting mold,establish a three-dimensional flow-solidification heat transfer coupled model,and analyze the flow field of molten metal during the filling process by analyzing different layout schemes.The layout of the mouth can make the filling process more stable and the impact of the mold smaller.Secondly,based on the feature points placed inside the casting cavity,by analyzing and comparing the temperature change curves and cooling rate change curves of the feature points,the influence of the die-casting process parameters on the internal solidification process of the casting is studied.Thirdly,design an orthogonal test for the optimization of process parameters,and compare the cooling rate of the glass transition temperature by the range analysis method.Gives the optimal combination of die-casting process parameters.Finally,establish three-dimensional flow-solidification heat transfer coupled model of composite materials with different thicknesses to study the influence of the thickness of the mold steel and die-casting process parameters on the cooling rate of the casting.After analysis the temperature change curve,cooling rate change curve,and glass transition temperature.Indicates the cooling rate decreases as the thickness of the die steel increases;increasing the high-speed injection speed can slightly increase the cooling rate;decreasing the initial temperature of the die-casting mold can significantly increase the cooling rate.