Titanium plate adopts simulation technology as a means of research and development to improve economic benefits!
Titanium plate usually needs to be β Single-phase zone or α+β The two-phase zone is thermally processed to obtain products with certain structure and properties. The selection of hot working parameters has an important impact on the processing properties and microstructure of titanium plate. In recent years, domestic research in the field of titanium plate thermal processing has been increasing, and the application of thermal simulation technology and numerical simulation technology in the thermal deformation mechanism and microstructure evolution of titanium plate is particularly prominent. Many scholars have carried out hot compression deformation experiments on different types of titanium plates using thermal/mechanical simulation testing machines, and obtained the flow stress curve of the material, namely the stress-strain relationship. The flow stress curve reflects the internal relationship between the flow stress and the deformation process parameters, and it is also the macroscopic manifestation of the internal structure change of the material. Xu Wenchen [3] and others carried out constant strain rate compression deformation test on a thermal simulator to study the dynamic thermal deformation behavior of TA15 titanium plate, calculated the deformation activation energy Q of the material and observed the thermal deformation structure. stay α The dynamic recrystallization in the phase region is the main softening mechanism of the material β The softening mechanism of phase zone is mainly dynamic recovery.
Compared with the traditional process trial and error method, adopting simulation technology as a means of research and development can shorten the development cycle, reduce production costs, optimize production processes, and achieve the purpose of improving production efficiency and increasing economic benefits. Due to the high price and long production cycle of titanium plate, the research of its production process urgently needs simulation technology to open up a shortcut for it, and overcome the problems such as narrow range of hot working temperature and complex and diverse relationship between process-structure-performance. Because the numerical simulation technology enables the hot processing process of titanium plate to be truly reproduced on the computer, enterprise producers and scientific researchers use this technology to study the relationship between the ideal process parameters and the corresponding organization and mechanical properties, so as to optimize the current production process and reduce the development cost of new products, new processes and new materials. Shao Hui et al. studied the effect of lamellar structure TC21 titanium plate in the two-phase zone forging process α Phase evolution. DEFORM software is used to simulate and analyze the change rule of temperature field and strain field in the forging process, and quantitative analysis is made α The smaller the Ferret Ratio is, the more spheroidized the morphology is. The results show that the strain field and temperature field affect the evolution of lamellar phase. Under the condition of low strain, the temperature at the center of the forging material is higher because the temperature at the edge of the forging material decreases rapidly and the recrystallization is sufficient.
The diversity of titanium plate microstructure is regularly related to the diversity of titanium plate multi-process production process and each process. This complex relationship determines that it is difficult to predict and control the microstructure and properties of titanium plate by traditional methods. With the development of computer and numerical simulation technology in recent years, the numerical simulation method of microstructure has become a powerful tool to obtain the quantitative relationship between the influence of main process parameters on the macro and micro structure of hot forming workpiece. Using numerical simulation technology to reproduce the evolution process of microstructure can not only deepen the understanding of the mechanism of microstructure change and promote the development of existing theories, but also improve the microstructure of materials and optimize the preparation process of materials, so as to obtain the expected mechanical energy of materials.
At home and abroad, thermal simulation technology and numerical simulation technology have been used to carry out a lot of research work on the thermal deformation mechanism and microstructure evolution of titanium plate, and the results such as the relationship between force and energy parameters and process parameters, microstructure, etc. have been obtained, which can play a role and effect in optimizing production process and improving product quality. However, due to the inaccuracy of material performance data, the difficulty of boundary conditions and friction parameters close to the reality, and the fact that the study of macro variables does not involve the change of microstructure and other factors, the simulation results have some errors compared with the actual production. In the future, the research on the hot deformation mechanism and microstructure evolution of titanium plate should combine the physical simulation technology and numerical simulation technology organically, establish a macro finite element model that is more in line with the actual production process, and coupling it with the microstructure evolution model, so as to make every effort that the simulation results can not only provide theoretical basis for the on-site production, but also guide the on-site process quantitatively, and finally achieve real-time tracking of the deformation process The purpose of controlling product quality.
