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Manufacturing method for novel single-alloy double-performance functionally-gradient titanium alloy compressor disc

A gradient function and compressor disk technology, which is applied in the direction of additive manufacturing, energy efficiency improvement, process efficiency improvement, etc., can solve problems such as high deformation temperature, complex process, and difficulty in realizing gradient changes in organization and performance

Active Publication Date: 2019-11-19
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to realize the gradual change of microstructure and performance in the transition area between the hub and the flange where the microstructure and performance are very different is a challenging problem in the manufacture of single-alloy dual-performance gradient functional titanium alloy compressor discs.
[0005] Isothermal forging is the main manufacturing technology of titanium alloy compressor discs for aero-engines. The dual structure / dual performance greatly optimizes the performance of titanium alloy compressor discs. However, titanium alloys have high deformation resistance, high deformation temperature, and narrow thermal processing window. Isothermal forging to manufacture dual-structure / dual-performance titanium alloy compressor discs has the disadvantages of long process flow and complicated process. Not only the cost of process equipment is high, but also there are many process equipments, which makes the manufacturing cycle of dual-structure / dual-performance titanium alloy compressor discs long. The manufacturing cost is high, and more importantly, isothermal forging has very limited ability to control the structure and performance of the transition zone of the dual-structure / dual-performance titanium alloy compressor disk, and it is difficult to realize the microstructure and performance of the transition zone of the dual-structure / dual-performance titanium alloy compressor disk. gradient of performance

Method used

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  • Manufacturing method for novel single-alloy double-performance functionally-gradient titanium alloy compressor disc
  • Manufacturing method for novel single-alloy double-performance functionally-gradient titanium alloy compressor disc
  • Manufacturing method for novel single-alloy double-performance functionally-gradient titanium alloy compressor disc

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] see figure 1 , the method comprises the following steps, (1) at first the TC11 titanium alloy rolling plate 5 is placed on the workbench 2 of the inert gas protection box 1, and the box is sealed after the clamping, and the oxygen content in the atmosphere in the box is reduced to below 50PPm, Through the laser head 3, a high-precision two-way coaxial powder feeding system is used to laser deposit two layers of TC11 titanium alloy disc hub 51 at the center of TC11 titanium alloy rolling plate 5, such as figure 2 As shown, follow the deposition trajectory until the cladding of the hub 51 area is completed, and then forge the above-mentioned laser-deposited titanium alloy forging, and select the arc surface point type indenter 4, under the control of the computer, along the upper surface of the laser-deposited titanium alloy forging , small-area cold forging is implemented point by point continuously, and all the cladding materials in the hub 51 area are forged and press...

Embodiment 2

[0027] The method comprises the following steps: (1) firstly place the TC11 titanium alloy rolling plate 5 on the workbench 2 of the inert gas protection box 1, seal the box after loading the card, reduce the oxygen content in the atmosphere in the box to below 50PPm, and pass The laser head 3 adopts a high-precision two-way coaxial powder feeding system to laser deposit two layers of TC11 titanium alloy disc hub 51 at the center of TC11 titanium alloy rolling plate 5, follow the deposition trajectory until the cladding of the disc hub 51 area is completed, and then perform the above process For forging of the laser-deposited titanium alloy forging, the arc-shaped point-type indenter 4 is selected. Under the control of the computer, small-area cold forging is carried out point by point along the upper surface of the laser-deposited titanium alloy forging, and all the cladding materials in the area of ​​the hub 51 are Forging is completed; in the process of continuous point forg...

Embodiment 3

[0032] The method comprises the following steps: (1) firstly place the TC11 titanium alloy rolling plate 5 on the workbench 2 of the inert gas protection box 1, seal the box after loading the card, reduce the oxygen content in the atmosphere in the box to below 50PPm, and pass The laser head 3 adopts a high-precision two-way coaxial powder feeding system to laser deposit two layers of TC11 titanium alloy disc hub 51 at the center of TC11 titanium alloy rolling plate 5, follow the deposition trajectory until the cladding of the disc hub 51 area is completed, and then perform the above process For forging of the laser-deposited titanium alloy forging, the arc-shaped point-type indenter 4 is selected. Under the control of the computer, small-area cold forging is carried out point by point along the upper surface of the laser-deposited titanium alloy forging, and all the cladding materials in the area of ​​the hub 51 are Forging is completed; in the process of continuous point forg...

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Abstract

The invention discloses a manufacturing method for a novel single-alloy double-performance functionally-gradient titanium alloy compressor disc. The manufacturing method for the novel single-alloy double-performance functionally-gradient titanium alloy compressor disc comprises the following steps: a TC11 titanium alloy rolled plate is placed in an inert gas protection box; clamping is carried out, and then box sealing is carried out; an oxygen content in an atmosphere in the box is reduced to be 50PPm and below; titanium alloy laser deposition is carried out through a high-accuracy two-way coaxial powder feeding system according to a deposition track until cladding for a disc hub area is completed; laser process parameters are as follows: a laser power is 1800-5000W; a scanning speed is greater than 6.5mm / s; a spot diameter is 3-4mm; an overlapping rate is 40%; and a powder feeding speed is 8-15g / min; forging and pressing are carried out on a titanium alloy forged piece subjected to the laser deposition, an arc-surface point press head is chosen, and a reduction amount of the press head is set to be 0.3-0.35mm; and under the control of a computer, small-area forging and pressing are continuously implemented point by point along the upper surface of the titanium alloy forged piece subjected to the laser deposition, and all cladding materials in the disc hub area are forged andpressed. The steps are repeated until cladding, and forging and pressing in a transition area and a disc edge area are completed. The method is capable of realizing the gradient gradual change of thestructure and performance of the transition area of the double-structure / double-performance titanium alloy compressor disc.

Description

technical field [0001] The invention relates to a manufacturing method of a novel single-alloy double-performance gradient functional titanium alloy compressor disc. Background technique [0002] Titanium alloy compressor disk is one of the key core components of aero-engine, its service conditions are extremely harsh, frequent start-stop in flight makes the disk hub bear huge cyclic centrifugal force, requiring it to have sufficiently high tensile mechanical properties And low cycle fatigue performance, while the flange under high temperature work requires high enough durability, creep strength and excellent crack growth resistance. It is obviously difficult for a single alloy structure / property to meet the service performance requirements of the above-mentioned conditions for the compressor disc. The research and manufacture of it has become an important development direction. [0003] C.C.Chen firstly forged the Ti-6242 cake blank with equiaxed α+β structure and the Ti-...

Claims

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Application Information

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IPC IPC(8): B22F3/105B22F3/17B22F3/24B22F5/10B33Y10/00
CPCB22F3/17B22F3/24B22F5/106B33Y10/00B22F2003/248B22F2999/00B22F10/00B22F10/25B22F10/64B22F10/36B22F10/32B22F2207/17Y02P10/25
Inventor 席明哲周昊阳崔广发陈帅程焜
Owner YANSHAN UNIV