Application of titanium plate in offshore power plant

Titanium alloys are usually required to β Single phase zone or α β The two-phase zone is processed by heat to obtain products with certain structure and performance. The selection of the hot working parameters has an important influence on the processing properties and microstructure of titanium alloy. In recent years, the research on titanium alloy hot working is increasing day by day, among which the application of thermal simulation and numerical simulation technology in the mechanism of thermal deformation and the evolution of microstructure of titanium alloy is particularly prominent.

Many scholars have carried out the thermal compression deformation experiments on different types of titanium alloy by using the thermal / force simulation test machine, and obtained the flow stress curve, namely the stress-strain relationship. The flow stress curve reflects the internal relationship between the flow stress and the deformation process parameters, and also represents the change of the internal structure of the material. Xuwenchen et al. Carried out constant strain rate compression deformation test on the thermal simulator, studied the dynamic thermal deformation behavior of TA15 titanium alloy, calculated the deformation activation energy Q and observed the thermal deformation structure. stay α The dynamic recrystallization in phase zone is the main softening mechanism of the material, while the dynamic recrystallization in the phase zone is the main softening mechanism of the material β The softening mechanism of phase zone is mainly dynamic recovery.

Because of the numerical simulation technology, the titanium alloy hot working process can be reproduced on the computer. Therefore, the manufacturers and researchers of enterprises use this technology to study the relationship between ideal process parameters and corresponding organization and mechanical properties, so as to optimize the current production process and reduce the cost of new products, new processes and new materials. Shaohui studied the forging process of TC21 titanium alloy with sheet structure in two phase zone α Phase evolution. The change law of temperature field and strain field in forging process is simulated and analyzed quantitatively by using DEFORM software α The smaller the FERET ratio, the spheroidization of the phase morphology. The results show that the strain field and temperature field affect the evolution of sheet phase. Under the lower strain condition, the edge of forging material decreases rapidly, recrystallization is sufficient, and the temperature at the center of forging material is higher.