Preparation method of functional gradient performance coil

A functional gradient and performance technology, applied in other manufacturing equipment/tools, engine components, turbines, etc., can solve the temperature gradient field controllability and low repeatability, complex selection of heat treatment regimes, and no compromise heat treatment and transition zone stress. problems, etc., to achieve the effect of high tensile strength and excellent low cycle fatigue performance

Active Publication Date: 2014-04-02
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bimetallic discs are deficient in not addressing the compromise heat treatment and transition zone stress issues of the two alloys
The disadvantage of this process is that the selection of heat treatment system is very complicated
The disadvantage of this process is that the controllability and repeatability of the temperature gradient field under the condition of long-term heating and holding are low

Method used

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  • Preparation method of functional gradient performance coil
  • Preparation method of functional gradient performance coil
  • Preparation method of functional gradient performance coil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Using FGH95 alloy, the main chemical composition (mass fraction, %) is: Co8.1, Cr13.1; W3.4, Mo3.4, Al3.4, Ti2.4, Nb3.4, C0.06, Ni balance . The wheel hub, spoke plate and wheel rim of the disc are respectively made of powders with a particle size of less than 50 μm, 50-100 μm, and greater than 100 to less than or equal to 200 μm. Put the powders of the above three particle sizes into carbon steel sheaths for simulation experiments. The size of the sheaths is Φ100×110mm. After the powders are filled, the sheaths are subjected to hot isostatic pressing. The hot isostatic pressing temperature is higher than that of the γ′ phase to completely dissolve. , so that the alloy is completely recrystallized, and equiaxed fine grains are obtained (the hot isostatic pressing temperature is 1200 ° C, the pressure is not less than 100 MPa, and the heat preservation and pressure holding time is not less than 2 hours), the jacket after hot isostatic pressing is peeled off, and the obta...

Embodiment 2

[0021] Using FGH95 alloy, the main chemical composition (mass fraction, %) is: Co8.1, Cr13.1; W3.4, Mo3.4, Al3.4, Ti2.4, Nb3.4, C0.06, Ni balance . The wheel hub, spoke plate and wheel rim of the disc are respectively made of powders with a particle size of less than 50 μm, 50-100 μm, and greater than 100 to less than or equal to 200 μm. Put the powders of the above three particle sizes into carbon steel sheaths for simulation experiments. The size of the sheaths is Φ100×110mm. After the powders are filled, the sheaths are subjected to hot isostatic pressing. The hot isostatic pressing temperature is higher than that of the γ′ phase to completely dissolve. , so that the alloy is completely recrystallized, and equiaxed fine grains are obtained (the hot isostatic pressing temperature is 1170 ° C, the pressure is not less than 100 MPa, and the heat preservation and pressure holding time is not less than 2 hours), and the jacket after hot isostatic pressing is peeled to obtain In...

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Abstract

The invention provides a preparation method of a functional gradient performance coil and belongs to the technical field of rapidly freezing powder metallurgy superalloys. According to the preparation method provided by the invention, powders with different particle sizes are adopted at different parts of a turbine disk to carry out direct hot isostatic pressing formation, and a coil after heat treatment acquires gradient grain structures with different grain sizes along the radial direction and has different gradient performances along the radial direction. With the adoption of the preparation method, a hub is strong in the tensile strength and excellent in the low-cycle fatigue performance, the mechanical property between the hub and a rim is good in transition, the rim has strong durability and strong creep resistance, and the requirements of the functional gradient performance coil are satisfied.

Description

technical field [0001] The invention belongs to the technical field of rapid solidification powder metallurgy superalloys, and in particular provides a method for preparing a functionally gradient performance disc. Background technique [0002] The turbine disk is the hot-end core component of an aero-engine. The working conditions of the turbine disks of modern high-performance aero-engines are very harsh, and the turbine disks are subjected to the superposition of the stress field and the temperature field; the stress includes the stress caused by the centrifugal force and vibration load generated during high-speed rotation; The rim (the outer circle of the disk) gradually increases toward the hub (the center of the disk), forming a stress gradient, and the temperature gradually increases from the hub to the rim, forming a temperature gradient. The rim is subjected to higher temperature and lower stress, and the hub is subjected to lower temperature and higher stress. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/14B22F7/06B22F5/00
Inventor 张义文韩寿波刘建涛贾建陶宇张莹孙志坤
Owner CENT IRON & STEEL RES INST
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