Hot working diagram-based cylindrical part hot power spinning precision/property integrated control method

Abstract

The present invention discloses a hot working diagram-based cylindrical part hot power spinning precision / property integrated control method. In the thermoplastic forming process of difficult-to-deform metal, a metal material high-temperature mechanical property test is performed in the temperature range and strain rate range of dynamic recrystallization; on the basis of power dissipation and rheological instability judgment criteria in the thermoplastic forming process, power dissipation diagrams and rheological instability diagrams under different strains are constructed according to a rheological stress and strain relation obtained in the high-temperature mechanical property test; the power dissipation diagrams and rheological instability diagrams are combined, a material hot working diagram is obtained; forming conditions under a potential dangerous forming condition which satisfies the rheological instability judgment criteria and a safe forming condition are obtained through analysis according to the distribution of power dissipation factors eta and the rheological instability judgment criteria, wherein the forming conditions have large power dissipation factors eta and can benefit thermoplastic forming; and cylindrical part hot power spinning forming is performed according to a material obtained according to the hot working diagram and temperature and a strain rate which benefit thermoplastic forming.

Description

technical field [0001] The invention relates to a thermal processing diagram and belongs to the field of thermoplastic forming of metal materials. In particular, it relates to a method for integrated control of thermal strength, rotation, and property of cylindrical parts based on thermal processing diagrams. Background technique [0002] On the basis of the dimensional accuracy requirements of traditional plastic forming, it is proposed to realize the superior microstructure and properties of formed parts, which is the characteristic and development trend of the current plastic forming technology. With the development of high-precision technologies such as aerospace, national defense, and ships, the application of cylindrical parts with high dimensional accuracy and good high-temperature performance is becoming more and more extensive. However, this type of alloy has high deformation resistance and poor plasticity at room temperature, and it is extremely difficult to perfo...

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Problems solved by technology

In terms of spinning forming, at present, the main focus is on the optimization of process parameters in terms of macroscopic forming quality and spinning defect control. The research on the evolution mechanism of microstructure also adopts the above-mentioned experimental methods, and only stays in the microstructure after forming. However, there is no synergistic research on macroscopic forming quality and microscopic tissue evolution, and no specific shape / property integrated control method is proposed on the basis of the physical mechanism of tissue evolution.

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