Transient heat flux coefficient of directional solidification interface in Squeeze Casting
In addition to the research on the interface heat transfer between casting and mold (die) in sand mold, metal mold, […]
In addition to the research on the interface heat transfer between casting and mold (die) in sand mold, metal mold, […]
The heat transfer coefficient model of squeeze casting interface is not affected by various experimental conditions theoretically. However, in the
Trovant et al. Found that the peak value of the heat transfer coefficient of the casting die interface appears when
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
The solution of the heat transfer coefficient and the research method of the heat transfer behavior of the interface between
Greenwood and Williamson proposed a statistical description of the vertex height of rough surface and considered that the convex curvature
The key to study the heat transfer behavior of casting die interface is the temperature change near the interface. It
The vertical semi-solid squeeze casting machine generally adopts the structure system of vertical clamping and clamping, bottom transverse feeding, bottom
In the study, the contact between two rough surfaces is equivalent to the contact between a smooth rigid surface and
In addition to Beck inverse algorithm, regularization method and optimization method are also the methods that researchers focus on. Tikhonov
The geometric characteristic parameters of rough surface are determined by iso12085 standard program. F. Robbe Valloire discussed this method in
The inverse algorithm is the most commonly used method to solve the heat transfer coefficient of the casting die interface.
The direct problem of heat transfer calculation is to solve the temperature distribution in the calculation area when the boundary
The coating used was water-based graphite, and the coating thickness was measured by tt260b coating thickness gauge. In this paper,
Under the background of the research on the heat transfer behavior and pressure transfer law of squeeze casting die interface,
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,
The heat transfer coefficient of squeeze casting die interface is calculated by inverse algorithm. In order to obtain accurate calculation
In the process of industrial production, physical quantities such as temperature, pressure and vibration are usually converted into electrical signals