Problems of using casting pressure as a dynamic impact factor on crystallizing metal

• Main Authors: Denisov, Maxim S., Kotov, Georgy A.
• Format: Conference Proceeding
• Language: English
• Subjects: Alloying elements; Aluminum alloys; Aluminum base alloys; Automatic control; Automation; Block diagrams; Compressibility; Control systems; Crystal defects; Pressure effects; Process controls; Process parameters; Solid solutions
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0127096

The paper presents the research results showing the positive effect of pressure on the formation of the structural properties of aluminum alloys. The processing modes have been established that create the most favourable conditions for the formation of equilibrium structures in aluminum alloys. On prototypes of aluminum alloy B95, having dimensions Ø80 × 60 mm, after processing according to the proposed technology, there are no defects in the cast structure in the entire section. A diagram of the isothermal decomposition of a supersaturated solid solution of alloying elements in aluminum is proposed, illustrating the possibility of quenching after pressing the melt under pressure and subsequent aging according to the selected mode. Using the proposed control and measuring system, the dependences of the change in the compressibility of the melt on pressure and time have been established. It is shown that obtaining high quality cast billets with a dense structure throughout the entire volume can be achieved provided that the process control is automated. A block diagram of a technological process control system has been developed, including a modern control and measuring system, automation and regulation means, which allows to control the main process parameters that have a direct impact on the formation of properties of the resulting blanks.