Scientific

The experimental and modeling studies on the heat transfer behavior and pressure transfer law of the casting die interface in […]

The microstructure after heat treatment was observed and studied. It was found that there were various sizes of holes left

The displacement of casting is defined as the displacement of nodes caused by solidification shrinkage and punch pressing. As shown

As shown in Figure 1, the pressure nephogram of aluminum alloy and magnesium alloy castings at different times (the pressure

The comprehensive mechanical properties of 7075 alloy wheel parts in as cast and T6 states by rheo squeeze casting were

Figure 1 (A-D) and figure 1 (E-G) show the solidification of aluminum and magnesium alloy castings at different times during

As shown in the figure, the casting die interface pressure reaches the maximum value soon after the applied pressure. The

The simulation method based on ANSYS is used to solve the temperature field and stress field in squeeze casting process.

With the solidification process, the interface pressure gradually decreases to zero at some positions. When the interface pressure is reduced

The heat transfer coefficient model of squeeze casting interface is not affected by various experimental conditions theoretically. However, in the

As the conformal surface moves down under certain pressure and contacts with the rigid surface, the interface spacing decreases. Some

The mechanical parameters of the interface include two aspects: elastic parameters and plastic parameters. The young’s modulus of the integrated

Greenwood and Williamson proposed a statistical description of the vertex height of rough surface and considered that the convex curvature

In the study, the contact between two rough surfaces is equivalent to the contact between a smooth rigid surface and

The geometric characteristic parameters of rough surface are determined by iso12085 standard program. F. Robbe Valloire discussed this method in

The coating used was water-based graphite, and the coating thickness was measured by tt260b coating thickness gauge. In this paper,

The initial temperature of the die represents the initial state of the die before the start of squeeze casting, and

Direct squeeze casting was used in squeeze casting experiment. In the process of direct squeeze casting, the high temperature melt

In the study, working conditions 1, 2, 3 and 4 represent four working conditions with applied pressure of 70, 46,

Because the characteristic of squeeze casting is that the high temperature melt solidifies under the external pressure, many experiments will

Taking the temperature measured by 1 mm and 6 mm thermocouples as the input condition, the interface heat transfer coefficient

The typical temperature measurement curves inside the mold at positions 2 and 3 are shown in Fig. 1 and 2.

In the study, working conditions 1, 2, 3 and 4 represent four working conditions with applied pressure of 70, 46,

Through the inverse algorithm, the mathematical model for calculating the interface heat flux and die surface temperature is established, and

The interface heat flux and die surface temperature of each time step can be calculated by inverse algorithm. In order

In squeeze casting process, the solidification process involves phase transformation, and the thermophysical properties of related parameters are temperature dependent,

The interfacial heat transfer coefficient is an important parameter to characterize the heat transfer between casting and die Where h

In order to find a way to determine the truncation frequency, a function is constructed. As shown in the formula,