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a preparation ti 2 Alnb/ti60 double alloy disk method

A double-alloy and alloy technology, which is applied in design optimization/simulation, CAD numerical modeling, special data processing applications, etc., can solve the problems of double-alloy disk joint defects, poor weldability, difficult homogenization and microstructure refinement, etc. , to achieve the effect of eliminating joint surface defects, solving poor weldability and good flatness

Active Publication Date: 2022-04-19
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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AI Technical Summary

Problems solved by technology

Ti produced by electron beam welding process or electron beam welding + forging process in the early stage in China 2 AlNb / Ti60 double alloy discs have problems such as difficult control of joint defects and unsatisfactory microstructure, as follows: ①Ti 2 AlNb has poor weldability, and it is difficult for electron beam welding to avoid defects such as microcracks and pores; ②The weld depth-to-width ratio is large during electron beam welding, and the narrow and long welds are prone to instability during forging deformation, and the flatness of the interface is difficult to control; ③The weld seam As-cast coarse grains and precipitated phase segregation (caused by melt pool segregation) are difficult to achieve complete homogenization and microstructure refinement through limited forging deformation
The problem of "weak connection" in the bonding area of ​​the two alloys has not been effectively solved, which seriously restricts the development and application of disk parts. Ti 2 Development of AlNb / Ti60 Double Alloy Disc Urgently Needs New Technology and New Method

Method used

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  • a preparation ti <sub>2</sub> Alnb/ti60 double alloy disk method
  • a preparation ti <sub>2</sub> Alnb/ti60 double alloy disk method
  • a preparation ti <sub>2</sub> Alnb/ti60 double alloy disk method

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Embodiment 1

[0030] Such as figure 1 A Ti with a size of Φ340mm×24mm (connection interface position Φ254mm±2mm) is shown 2 AlNb / Ti60 double alloy dish, the preparation steps of adopting the method of the present invention are as follows:

[0031] 1. Select Ti with a particle size of 53 μm to 150 μm 2 AlNb alloy powder is loaded into a steel sheath through the powder filling port, and then subjected to hot isostatic pressing after compaction, vacuum degassing, sealing welding, hot isostatic pressing parameters: 1020°C / 140MPa / 2h, and Ti 2 AlNb powder alloy, hot isostatic pressing placed Ti60 alloy bar with the furnace, Ti after hot isostatic pressing 2 A sample of Φ8mm×12mm was taken from the AlNb powder alloy and Ti60 alloy rod for thermal compression test to obtain the stress-strain curve, based on which the Ti 2 Material constitutive model of AlNb powder alloy and Ti60 alloy;

[0032] 2. Design Ti according to the structural size of the double alloy disc 2 The geometric structure of th...

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Abstract

The present invention is a kind of preparation Ti 2 The method of AlNb / Ti60 double alloy disk, the present invention prepares Ti for electron beam welding+forging process 2 AlNb / Ti60 dual-alloy discs have problems such as welding defects, interfacial structure and flatness, etc., and innovatively use powder-solid-heat isostatic pressure diffusion bonding + isothermal forging to prepare dual-alloy discs. The method includes the following steps: construction of material constitutive model; structural design of forged preform; structural design of double alloy powder-solid ingot, wrapping processing and powder-solid assembly; powder-solid hot isostatic pressure diffusion bonding; double alloy Isothermal forging of preforms; heat treatment of double alloy disc forgings. Adopt the Ti prepared by the present invention 2 The AlNb / Ti60 dual alloy disk has good interface integrity, flatness and good microstructure, which meets the cutting performance requirements and weight reduction requirements of the aero-engine compressor disk.

Description

technical field [0001] The present invention is a kind of preparation Ti 2 The method for an ALNb / Ti60 double alloy disc belongs to the technical field of thermal processing. Background technique [0002] The improvement of the thrust-to-weight ratio of aero-engines has made the problems of improving the service performance of components and reducing their own weight more and more prominent. As an important rotating part in the engine, the operating conditions of the compressor disc put forward the cutting performance requirements for the disc: the rim is connected to the blade, the working temperature is high, but the stress is small, and the material is required to have high creep performance and fracture toughness; The hub is connected to the shaft, and the working temperature is low, but it bears the large centrifugal force brought by the rotation of the wheel, which requires the material to have high strength, plasticity and low cycle fatigue strength. The performance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/15B22F3/17B22F3/24B22F5/00B22F7/08C22F1/18G06F30/20G06F111/10
CPCB22F3/15B22F3/17B22F3/24B22F5/00B22F7/08C22F1/183G06F30/20B22F2003/248G06F2111/10
Inventor 李凯林莺莺李伟于勇
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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