Research and Application of Grain Refining Technology in Casting Processes

Abstract

Grain refining technology plays a significant role in enhancing the mechanical properties, improving material quality, and increasing the durability of castings during the casting process. This paper mainly discusses the theoretical foundation of grain refining, influencing factors, and its application in the casting process. The core mechanism of grain refining is to promote the formation of crystal nuclei and suppress excessive grain growth, thereby achieving precise control of grain size. Studies indicate that refining agents (such as rare earth elements, titanium, boron, etc.), cooling rate, and alloy composition are key factors that affect the grain refining effect. With the control of cooling rate, optimization of alloy composition, and the use of external refining agents, grain refining technology has been widely applied in the casting of materials such as aluminum alloys and steel alloys. In the future, with the development of new materials and intelligent manufacturing technologies, grain refining technology will play an even more crucial role in the production of high-performance castings.