Precision Control Of Resistance Heating Bending Of GH99 And TA15 Alloy U Shaped Part

With the rapid development in the field of aerospace, the high temperature resistance and lightweight of the material put forward higher requirements. Due to GH99 superalloy not only has good high temperature oxidation resistance and corrosion resistance, but also has the high high-temperature strength, creep strength and creep rupture strength, and good anti fatigue performance. Therefore, GH99 superalloy has a large number of applications in aerospace field under the condition of high temperature structural components, such as aero engine blades, turbine disk, and combustion chamber. As another important alloy material in the aerospace field, the TA15 titanium alloy has the advantages of small mass, high temperature, strong corrosion resistance and so on. Compared with traditional materials, the structure of titanium alloy materials can be reduced effectively, which makes the application of titanium and titanium alloys in aerospace, automotive industry and shipbuilding industry in recent years. But these two alloys have poor performance on room temperature forming, in a certain extent limits the further application of GH99 superalloy and TA15 titanium alloy, and the traditional thermal forming method efficiency low, high energy consumption, does not meet the concept of sustainable development now. This paper, in view of the above problems, mainly in the following aspects of the study:In order to explore the process parameters of U shape bending precision control of TA15 titanium alloy resistance heating forming, the resistance heating experiment of TA15 titanium alloy was carried. According to the experiment, the time-temperaturecurrent density curve of the material have been obtained. According to the relationship between time, temperature and current density and the influence of the three on the temperature field of the plate, the resistance heating bending experiment of shrinkage U shaped been experimented. Based on the summary and analysis of the experiments, we obtain the reasonable resistance heating forming parameters including the forming temperature, current loading path, die structure and so on.According to the characteristic of the resistance heating forming process, optimization design and manufacture of large-scale resistance heating and forming equipment on the basis of the original. In addition, using this large-scale resistance heating and forming equipment, the GH99 alloy U-shaped parts were forming successfully.Sorting the process parameters obtained from the resistance heating and bending experiment and collecting the basic performance data of the material, doing concept design, logic design, physical design and the function design for material database based on the design requirements; saving performance data to corresponding child database; database; carrying on database system development by using Visual Studio, achieves some functions, such as user login, user information management and corresponding data operations; the operation examples shows that the database is working properly, and can realize all functions.