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A composite preparation process of inertia friction welding and isothermal deformation of a dual-performance titanium alloy disc

A technology of inertia friction welding and preparation technology, which is applied in the field of forging and forming of metal alloys, can solve the problems of performance reduction, large difference in melting point of double alloys, and use of crack sources, etc., to eliminate residual stress, meet process requirements, and reduce friction. Effect

Active Publication Date: 2021-12-10
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the dual-alloy-dual-performance disk is mainly trial-produced by hot isostatic pressing + superplastic forging and welding of dissimilar alloys. The melting points of the double alloys are quite different, which leads to difficulties in subsequent heat treatment; although the welding process of dissimilar alloys realizes the connection transition of the double alloy discs to a certain extent, the quality of "weak connections" such as voids, coarse grains, and non-uniform structures in the welding transition zone However, the problem limits its practical application
[0003] "Weak connection" problems such as voids, coarse grains, and non-uniform structures in the welding process of dissimilar double alloys are easy to form crack sources and reduce performance

Method used

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  • A composite preparation process of inertia friction welding and isothermal deformation of a dual-performance titanium alloy disc
  • A composite preparation process of inertia friction welding and isothermal deformation of a dual-performance titanium alloy disc
  • A composite preparation process of inertia friction welding and isothermal deformation of a dual-performance titanium alloy disc

Examples

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example 1

[0031]Example 1: Use step 1 of this method to design an IMI834 titanium alloy outer ring as the rim, the thickness of the outer ring is 30mm, the diameter of the outer ring is 120mm, the diameter of the inner ring is 60mm with a 12.5° taper, and the entire outer ring is used as a friction welding rotating end. Design Ti6246 titanium alloy inner shaft as the moving end, the diameter of the inner shaft is also 60mm with a 12.5° taper, the concentricity tolerance of the ring and the inner shaft taper is less than 0.2mm; through step 2, the IMI834 alloy outer ring and the Ti6246 alloy inner shaft are respectively For annealing treatment, the two alloys are first rough-machined according to the design size in step 1, and the machining allowance of 1mm is reserved, and then the two alloys are placed in the SX-10-13 box-type resistance furnace for 1020 ° C, 2h air cooling and 930°C, 1h air cooling standard annealing treatment, resistance furnace temperature controller model is KSW-40-...

example 2

[0033] Example 2: Use step 1 of this method to design a Ti60 titanium alloy outer ring as the rim, the thickness of the outer ring is 30 mm, the diameter of the outer ring is 120 mm, the diameter of the inner ring is 60 mm with a 12.5° taper, and the entire outer ring is used as a friction welding rotating end. Design Ti6246 titanium alloy inner shaft as the moving end, the diameter of the inner shaft is also 60mm with a 12.5° taper, the concentricity tolerance of the ring and the inner shaft taper is less than 0.2mm; after step 2, the Ti60 alloy outer ring and the Ti6246 alloy inner shaft are respectively For annealing treatment, the two alloys are first rough-machined according to the design size in step 1, and the machining allowance of 1mm is reserved, and then the two alloys are placed in the SX-10-13 box-type resistance furnace for 1020 ° C, 2h air cooling and 930°C, 1h air cooling standard annealing treatment, resistance furnace temperature controller model is KSW-40-11,...

example 3

[0035] Example 3: Use step 1 of this method to design the outer ring of Ti60 high-temperature titanium alloy as the flange, the thickness of the outer ring is 30 mm, the diameter of the outer ring is 120 mm, the diameter of the inner ring is 60 mm with a 12.5° taper, and the entire outer ring is used as a friction welding rotating end , design the Ti6246 high-strength titanium alloy inner shaft as the moving end, the diameter of the inner shaft is also 60mm with a 12.5° taper, the concentricity tolerance of the ring and the inner shaft taper is less than 0.2mm; after step 2, the Ti60 alloy outer ring and the Ti6246 alloy inner The shafts are annealed separately. First, the two alloys are roughly machined according to the design size of step 1, and a machining allowance of 1 mm is reserved. Then, the two alloys are respectively placed in a SX-10-13 box-type resistance furnace for 1020 ℃, 2h Standard annealing treatment of air cooling and 930°C, 1h air cooling, resistance furnace...

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Abstract

The invention relates to a compound preparation process of inertial friction welding and isothermal deformation of a dual-performance titanium alloy disc. First, the structural dimensions of two titanium alloys that meet the working environment of the dual-performance titanium alloy disc are determined, and annealing is performed at a temperature lower than the β transformation temperature. Then, the two annealed titanium alloys are subjected to inertial friction welding, and then the welded double-alloy disk is heated for isothermal deformation, and finally gradient heat treatment is performed to obtain a dual-performance titanium alloy disk with uniform structure and good performance. The present invention breaks through the bottleneck problem of the dual-alloy disc connection technology, and maximizes the structural benefits of the dual-alloy-dual-performance disc. The inertial friction welding + isothermal deformation composite preparation technology of the dual-performance titanium alloy disk can obtain a double-titanium alloy disk with fine structure, good strength and plasticity, which can be used to prepare high-performance double-titanium alloy integral components.

Description

technical field [0001] The invention belongs to the technical field of metal alloy forging and forming, and relates to a compound preparation process of inertia friction welding and isothermal deformation of a dual-performance titanium alloy disc. Background technique [0002] The engine disk is in a state of high temperature and high speed rotation when it is working, and the forces and environmental conditions of the disk core and disk rim are different, so it is necessary to meet the different mechanical properties of the disk core and disk rim at the same time, that is, dual performance requirements. Dual performance can be achieved by a single-alloy double-tissue disc with different structures corresponding to different properties, or a double-alloy disc with different alloys and different properties. Dual-structure-dual-performance disc is to use forging combined with heat treatment process to prepare two kinds of structures of the same alloy disc flange and disc core ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/18C22F3/00
CPCC22F1/183C22F3/00
Inventor 赵张龙宋旭阳闵晓楠姚泽坤宁永权
Owner NORTHWESTERN POLYTECHNICAL UNIV
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