Medical titanium material The manufacturer usually needs to introduce titanium plate to you in β Single phase area or α+β Two phase zone is hot processed to obtain products with certain structure and properties. The choice of hot working parameters has an important impact on the processing properties and microstructure of titanium plate. In recent years, the domestic research in the field of titanium plate hot working is 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 materials, that is, the stress-strain relationship. The flow stress curve reflects the internal relationship between the flow stress and the deformation process parameters, and is also the macroscopic expression of the changes in the internal structure of materials. Xu Wenchen [3] and others conducted constant strain rate compression deformation tests 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 hot deformation microstructure. stay α Dynamic recrystallization in the phase region is the main softening mechanism of the material, and β The softening mechanism of the phase region is mainly dynamic recovery.

Compared with the traditional process trial and error method, adopting simulation technology as a research and development means can shorten the development cycle, reduce production costs, and optimize the production process, so as to improve production efficiency and increase economic benefits. However, due to the high price and long production cycle of titanium plate, the research of its production process urgently needs simulation technology to open a shortcut for it, and overcome the problems such as narrow hot working temperature range, complex and diverse process structure performance relationships, etc. Because the numerical simulation technology enables the titanium plate hot working process to be truly reproduced on the computer, both enterprise producers and scientific researchers use this technology to study the relationship between ideal process parameters and corresponding structures 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 [11] et al. studied the forging process of TC21 titanium plate with lamellar structure in two-phase zone α Facies evolution. The change law of temperature field and strain field in forging process was simulated and analyzed quantitatively by DEFORM software α The smaller the Feret Ratio, the more spheroidized the morphology.

There is a regular relationship between the diversity of titanium plate microstructure and the diversity of titanium plate multi process production process and each process. This complex relationship makes it difficult for traditional methods to predict and control the microstructure and properties of titanium plates. 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 main process parameters and the macro and micro structures of hot formed parts. 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.

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