The raw materials used in the experiment are two kinds of alloy composition, including low chromium hypoeutectic white cast iron […]
The purpose of this study is to modify the solidification structure of chromium white cast iron by pressure casting. The
The solid-liquid phase transition process changes greatly under pressure. With the increase of the temperature of the solid-liquid phase line,
Pressure casting is a method that liquid or semi-solid alloy melt is pressed into the mold cavity at high speed
The room temperature tensile strength and elongation of A1 and A2 alloys under different processes are shown in Fig. 1.
This kind of die-casting is a process between metal mold casting and die-casting. Under the action of pressure, the aluminum
Pressure casting is called die casting for short. Under a certain pressure, the melt can fill the cavity. The structure
The control system of vacuum differential pressure casting is one of the key factors to ensure the quality of castings,
In order to meet the requirements of lightweight and integration of components, a large number of large-scale complex thin-walled aluminum
1. Low pressure casting process With the development of science and technology, the disadvantages of using gravity casting to produce
According to the principle of low pressure casting, the key of the process is the filling process. The solution of
One of the main purposes of low-pressure casting technology is to solve the contradiction between filling and feeding of the
The basic principle of low pressure casting is: under the action of pressure, the liquid metal at a certain temperature
With the rapid development of the world economy, the overall precision manufacturing of large thin-walled complex components has become the
In order to eliminate the shortcomings of sand casting, improve the quality of die casting parts and expand the application
Shrinkage cavity and porosity are inevitable defects in a kind of die casting wheel. In the microstructure, the shrinkage cavity
For the same alloy, whether the hub cracks or not often depends on the hub structure, process parameters and mold
Gravity casting Gravity casting refers to the process of injecting molten metal into the mold under the action of the
1) Reasonable design of liquid lifting system Because the holding time is too long, or the liquid in the lifting
Low pressure casting can realize high mechanization and automation, not only improve the productivity (10-15 type / h), but also
Other countries mainly applied powder release agent to vacuum pressure casting, especially since 2000, the rapid development of high vacuum pressure
