7 results about "Structure property" patented technology

The invention relates to a GH4706 alloy long-time thermal exposure structure performance evaluation method, belongs to the technical field of high-temperature alloy performance evaluation, and solves the problem that an existing method is incomprehensive in alloy performance evaluation. The method comprises the following steps: selecting an alloy forge piece to carry out a long-term thermal exposure test, obtaining structure property data and / or structure parameters of the alloy forge piece at different temperatures and different thermal exposure time, and forming an actual measurement data set; determining a relationship p = T (lgt + C) / 1000 between the time-temperature unified parameter and the thermal exposure time and thermal exposure temperature, substituting experimental data and different C values into a formula, and calculating p; establishing a preliminary fitting model between the p and the structure performance data and / or the structure parameters through linear fitting; determining an optimal C value; establishing a final fitting model between the p and the structure performance data and / or the structure parameters; and verifying the equivalence of the model by using a p value, and evaluating the performance by using a final fitting model. The method can comprehensively evaluate the performance of the alloy.

The invention provides a friction stir deposition repairing method for magnesium alloy surface defects. Comprising the following steps: step 1, checking and cleaning a defective component; 2, a to-be-repaired area is machined, and a filling material is prepared; 3, the to-be-repaired part is installed and clamped, and repairing is conducted; 4, waste materials are cleaned, and next-layer deposition repair is conducted; 5, the repairing quality and performance are inspected; and 6, after repairing is completed, surface treatment and coating are conducted on the part. Based on the solid-phase characteristics of the magnesium alloy, the AFSD technology is used for repairing the surface defects of the magnesium alloy, and the defects such as cracks and air holes are avoided; according to the AFSD repairing method, under the condition that the structure property of the feeding material is not changed, the influence on the base material can be effectively avoided, and compared with other repairing methods, the residual stress and the thermal deformation degree after AFSD repairing are low.

The invention discloses a method for realizing accurate control of structure evolution of high-strength steel based on controllable cooling, relates to the technical field of structure evolution regulation and phase change regulation of metal materials, and aims to solve the problems of narrow process window, easiness in cracking, non-uniform structure property and the like of a traditional quenching process of 22MnB5 steel. Continuous in-situ observation from melt solidification to phase change ending is achieved for the first time, and the regulation and control rule of the cooling rate on the structure type is defined by combining microstructure correlation analysis at different cooling rates of 1-30 DEG C / s; meanwhile, the starting and ending temperature and time of delta-gamma, gamma-alpha or martensite phase transformation are accurately determined by combining DSC thermal analysis with microscopic image contrast, and the error caused by the fact that a traditional CCT curve depends on experience derivation is overcome; according to the technology, the structure stability and performance reliability of the 22MnB5 steel are improved, and the technology can be popularized to high-strength steel systems with the liquid-solid-solid transformation characteristic such as hot forming steel and die steel.

The invention provides a vibration constraint composite shape righting device and method for a metal shell, belongs to the technical field of part machining, and solves the problem that shape righting operation cannot be performed on the metal shell under the condition that the quality of the metal shell is guaranteed in the prior art. The mold comprises a male mold and a female mold, containing grooves used for containing metal shells are formed in the male mold and the female mold, wear-resistant coatings are arranged on the inner walls of the containing grooves, connecting plates are arranged on the outer walls of the male mold and the female mold, and anti-loosening screw assemblies movably penetrate through the connecting plates. The surface of the metal shell does not need to be directly mechanically touched in the vibration shape correction process, surface damage caused by external force scraping, extrusion and the like is avoided, and the surface quality and integrity of the shell can be kept easily. And meanwhile, the structure property change of the metal material cannot be caused, and it is ensured that the mechanical property of the shell after shape correction is not affected.

The invention provides application of a stepped controlled forging process to improvement of the structure property uniformity of niobium microalloying medium-carbon ultrahigh-strength steel. The step controlled forging process comprises a forging process in which the forging temperature and / or the forging deformation rate of three stages are sequentially reduced. The structure property uniformity of the niobium microalloying medium-carbon ultrahigh-strength steel is improved on the basis of a stepped controlled forging process, the invention further provides a corresponding forging method, and the forging method comprises the steps of high-temperature homogenization, high-temperature rough forging, medium-temperature precision forging, low-temperature finish forging and a heat treatment process. Through the stepped controlled forging technology, the niobium microalloying characteristic is combined, deformation parameters are regulated and controlled in stages, the synergistic effect of grain refinement, precipitated phase dispersion distribution and dislocation strengthening is achieved, and the bottleneck of the prior art is broken through. The ultrahigh-strength steel with the transverse tensile strength being 1.9 GPa and the transverse U-shaped notch impact energy being larger than or equal to 40 J can be prepared through the method, and low cost and transverse toughness are achieved.

The application discloses a laser glass component screening method and a laser glass manufacturing method, and the component screening method comprises the following steps: dividing a glass forming range based on consistent melting compounds, and obtaining physical properties and spectral data of a plurality of components in the glass forming range; obtaining structural characteristic description operators of the components based on molecular dynamics simulation; constructing a training data set based on the structural characteristic description operators, the physical properties and the spectral data; constructing a component-structure-property model of the glass, training the model based on the training data set, obtaining the trained component-structure-property model of the glass, and predicting corresponding physical properties and spectral data of the glass components based on the trained component-structure-property model of the glass, according to the glass components or the structural characteristic description operators as input variables. The application can efficiently and accurately screen the laser glass components.

The invention relates to a construction method of a GH4706 alloy long-time thermal exposure structure performance evaluation model, belongs to the technical field of high-temperature alloy performance evaluation, and solves the problems that an existing model is incomplete in alloy performance evaluation, long in period and high in cost. The method comprises the following steps: selecting an alloy forge piece to carry out a long-term thermal exposure test, obtaining structure property data and / or structure parameters of the alloy forge piece at different temperatures and different thermal exposure time, and forming an actual measurement data set; determining a relation k = T (lgt + C) / 1000 between the time-temperature unified parameter and the thermal exposure time and thermal exposure temperature, substituting experimental data and different C values into a formula, and calculating k; establishing a preliminary fitting model between the k and the structure performance data and / or the structure parameters through linear fitting; determining an optimal C value; and based on the optimal C value and the preliminary fitting model, establishing a final fitting model between k and the structure performance data and / or the structure parameters. The method can comprehensively evaluate the performance of the alloy.