High-temperature alloy bar billet heating device and method for shaft forgings

Abstract

The invention discloses a high-temperature alloy bar billet heating device and method for shaft forgings, belongs to the field of material forming and control, and aims to achieve independent controlover local structures of the forgings and improve the uniformity of overall assemblies of the forgings. The heating device comprises a heating furnace, a controller, a temperature controller, a temperature measuring galvanic couple and a variable-frequency power supply, wherein an input port of the controller is connected with the temperature measuring galvanic couple; an output port of the controller is connected with an input port of the temperature controller; an output port of the temperature controller is connected with the variable-frequency power supply; and the variable-frequency powersupply supplies power to an induction coil in the heating furnace. According to the heating method, the core surface temperature difference is controlled to be smaller than or equal to 5 DEG C, the temperature of a bar billet transition area is gradually decreased to the normal temperature from the large end to the small end, and discharging is conducted when the core temperature reaches the settemperature. According to the high-temperature alloy bar billet heating device and method for shaft forgings provided by the invention, electromagnetic induction heating is adopted, local deformationof a rod blank is controlled, the proper heating temperature is matched according to forging deformation at all positions, the heating range is accurately controlled, the local structure performance of a forging is independently controlled, and the uniformity of the overall structure performance of the forging is improved.

Description

technical field [0001] The invention belongs to the field of material forming and control, in particular to a heating device and a heating method for a high-temperature alloy billet for shaft forgings. Background technique [0002] In the field of forging, this kind of forging contradiction problem is often encountered, that is, forging needs to be completed in multiple fires. However, each fire can only complete local deformation, and the overall heating of the metal blank between multiple fire deformations causes different parts of the blank. Due to the inconsistency in the microstructure evolution of each part of the billet, the overall microstructure of the forging is uneven, and even some local grains are coarse and the mechanical properties are unqualified in some positions, resulting in the scrapping of the forging and economic losses. [0003] For example, aero-engine shaft forgings are usually composed of a large head flange and a longer rod, which is a high-tempera...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor overall uniformity of the forgings in the overall heating of the traditional high-temperature alloy billets, to provide a heating device and heating method for high-temperature alloy billets for shaft forgings, to realize individual control of the local structure of the forgings, and to improve the quality of the forgings. Overall Assembly Uniformity

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