Development status of casting technology

The basis of casting process design is the casting forming theory. The casting forming theory studies the mechanical, physical and chemical changes of metal in the process of transformation from liquid to liquid and solid mixed state and then to solid state. These changes occur in the mold cavity. The casting forming theory studies the internal changes of castings and the interaction between castings and molds.

After long-term practice and research in the casting industry at home and abroad, the casting molding theory is becoming more and more mature, which is the basic theory of casting process design. These theories include the hydrodynamics of liquid metal forming process, the filling ability of liquid metal, the interaction between liquid metal and mold, the crystallization of castings, the solidification of castings, the shrinkage of castings, and the gas and non-metallic inclusions in castings.

Since the world’s first computer appeared in 1946, computer technology has developed rapidly in various fields, including casting. Computer technology promotes the rapid development of casting simulation technology and improves the overall level of casting technology.

In 1962, forund of Denmark was the first to simulate the solidification process of castings by electronic calculation. Subsequently, foreign developed countries have carried out research in this field. After nearly 50 years of development, numerical simulation of casting forming process has become a very important research direction in the field of casting technology, and it is also an internationally recognized important frontier field of manufacturing and material science.

In the 21st century, R. schwai2e proposed an Euler Lagrange mathematical model to solve the expansion behavior of the flow field of continuous casting steel strip and the dispersed phase in the flame. Bakhtiyarowt et al. Simulated the casting filling process using the hydrodynamic analysis software FLOW-3D, mainly simulating the velocity field distribution and pressure loss. Through the test, it was found that the results were very consistent with the theoretical simulation.agreement.

In 2004, Sakuragi and Takuya of Japan proposed a new algorithm for mold filling process. The algorithm is based on cold pressing method (CIP) and considers the problem of surface tension. After using this method to simulate die casting and squeeze casting, combined with the position and size of pores, a conclusion is drawn, Surface tension is the most important factor to predict pore defects. Kashiwaishigeo et al. In Japan simulated the filling process of vacuum suction of AC4C tin alloy casting, observed the filling process with X-ray, and tested the accuracy of the numerical simulation results.

Scroll to Top