A powder superalloy component stage heating extrusion control device and its use method

Abstract

The invention relates to a stage heating and extrusion controlling device for powder superalloy members and a using method. According to the using method, with the help of the deformation temperatureand pressure of stage change, the low-temperature and low-pressure curing and high-temperature and high-pressure controlling of powder materials at a time are realized. The method comprises the stepsthat firstly, powder is preliminarily cured under the conditions of lower temperature (no more than 700 DEG C) and lower pressure (no more than 500 MPa); then, the superalloy powder is completely densified by increasing the temperature (no more than 1000 DEG C) and combining plastic deformation parameters such as low extrusion ratio (no more than 2:1) and deformation speed, and a powder superalloyingot with certain deformation is obtained; and a microstructure with the grain size being 7-13 levels can be obtained by further increasing the temperature (no more than 1100 DEG C) and combining plastic deformation parameters such as larger extrusion ratio ((4:1)-(9:1)) and deformation speed. The integration of solidification-control of the powder superalloy members is achieved, the technological process is simplified, the development cycle is shortened, the material utilization rate is improved, and the manufacturing cost of the members is reduced.

Description

technical field [0001] The invention relates to a powder superalloy component stage heating extrusion control device and a use method thereof, which belong to the technical field of thermal processing. Background technique [0002] Powder superalloy is a plate material developed to solve the solidification segregation and deformation difficulties caused by the high alloying of cast and forged alloy superalloys. Highly alloyed powder superalloys have the advantages of high temperature resistance, high strength and toughness, and low crack growth rate. They are the preferred materials for manufacturing high-performance, high-reliability, and long-life advanced aeroengine turbine disks and other high-temperature resistant components. However, high-alloyed powder superalloys are generally extremely sensitive to temperature, have a narrow processing window, and are hard-to-deform alloys, which lead to certain difficulties in process execution and microstructure control. [0003]...

AI Technical Summary

Problems solved by technology

However, high-alloyed powder superalloys are generally extremely sensitive to temperature, have a narrow processing window, and are hard-to-deform alloys, which lead to certain difficulties in process execution and microstructure control.

[0003] Foreign powder superalloys are mainly used to prepare high-performance engine turbine discs and other hot-end components, and are mainly prepared by powder hot isostatic pressing + extrusion + isothermal forging. The process is characterized by complex processes, long preparation cycles, and high costs. Moreover, the component blank needs to be machined multiple times between different processes to meet the requirements of the process for the shape and surface state of the component blank, resulting in low material utilization

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