In the current process of analyzing the impact on the structure and properties of titanium alloys, we must first clarify the characteristics of heat treatment. When heat treatment mainly relies on quenching, the dual-phase titanium alloy can form a metastable phase decomposition operation, thereby ensuring the stability of the horse in the titanium alloy. There will be no obvious strengthening problem during the titanium phase transformation. At the same time, the titanium alloy will also undergo an allotropic transformation, which will make it difficult to refine the titanium alloy. Because the thermal conductivity of titanium alloy is relatively poor, so If there is local deformation or temperature increase, a Widmanstatten structure will be formed, which will lead to a reduction in the thermal conductivity of the entire titanium alloy material, especially during the heat treatment of some α plus β titanium alloys, because of their quenching Thermal stress is relatively large, so it is easy to cause bending problems in titanium alloy parts.
Because the chemical properties of titanium elements and titanium alloy materials are relatively active and are prone to hydrogen evolution reactions, causing hydrogen embrittlement problems, the atmosphere must be strictly controlled when using a heating furnace to heat titanium alloy materials. , and titanium elements and titanium alloy substances are also prone to chemical reactions with water vapor and oxygen elements, and then a dense oxide layer appears on the surface of the titanium alloy, which affects the performance of the entire titanium alloy. Therefore, when heat treating it The influence of the oxide layer should be clarified during the process.
The phase transition temperature of titanium alloy will be affected by the melting conditions and melting parameters, such as the degree of vacuum in the heating furnace, the number of smelting times and the content of impurities, etc., which will have a certain impact on the phase transition temperature of titanium alloy, especially When titanium alloy materials are heated in the β-type, the tendency of the β-type titanium alloy to grow is relatively large, which leads to the coarsening problem of the β-type titanium alloy and decreases its plasticity. Therefore, the heating temperature should be And the heat preservation time should be strictly controlled to prevent the plasticity and other performance of the grain from being affected during the heat treatment process in the β-type.
In order to clarify the impact on its performance and organizational structure, the corresponding experimental process needs to be carried out first. First, the sample to be tested is placed in a heat treatment temperature of 955°C and solid solution operation is performed in an atmosphere furnace. After completing the solid solution for one hour Afterwards, carry out furnace cooling, air cooling and water cooling operations, and then ensure that it is kept at around 560°C for 6 hours, and use a microscope to detect the structure of the sample, and clarify its microstructure morphology, and then use a universal testing machine The mechanical properties of the sample were tested in all aspects, and by studying the impact of the change in cooling rate after solid solution, the impact on the microstructure, conditions and influencing processes were explored.
Then we will explore the changes in the microstructure and its impact on mechanical properties, and then establish the corresponding relationship. Use similar methods to ensure that the test can perform solid solution operations at different temperatures, and then adopt different solution temperatures. , perform corresponding data analysis on the microstructure and mechanical properties of the sample. Then, under the conditions of ensuring the temperature of the same species, the insulation time is controlled to 4 hours, 6 hours, 8 hours and 12 hours respectively, and then the air cooling operation is performed, and then different insulation times are observed. length, the influence on the microstructure and mechanical properties of the sample, and the experiments under each different condition were conducted three times, and the average of the three parallel samples was taken as the corresponding results for comparative analysis.
