CN107138924B - A kind of bimetallic dual-property titanium alloy integral blade disk manufacturing method - Google Patents
A kind of bimetallic dual-property titanium alloy integral blade disk manufacturing method Download PDFInfo
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- CN107138924B CN107138924B CN201710500208.3A CN201710500208A CN107138924B CN 107138924 B CN107138924 B CN 107138924B CN 201710500208 A CN201710500208 A CN 201710500208A CN 107138924 B CN107138924 B CN 107138924B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/02—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine or like blades from one piece
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Abstract
The invention belongs to engine manufacturing technology field, specially a kind of bimetallic dual-property titanium alloy integral blade disk manufacturing method.The wheel disc [1] and blade-section of the integral blade disk are manufactured using different materials.The manufacturing method including the following steps: produce the titanium alloy blade blank of different materials using electron beam fuse deposition increasing material manufacturing method on the basis of wheel disc forging first；Then the manufacture of bimetallic dual-property titanium alloy integral blade disk is finally realized to blade design size using machining or Electrolyzed Processing.The present invention has the characteristics that manufacturing cost is low, the period is short, metallurgical quality is high.Blade and wheel disc [1] are manufactured using different materials can give full play to respective mechanical property advantage, meet the integral blade disk high-intensitive, requirement of the requirement of Large strain fatigue behaviour and blade to high stress fatigue and enduring quality to wheel disc [1], to realize the purpose that integral blade disk is on active service under the conditions of higher temperature or replaces high temperature alloy integral blade disk to realize loss of weight.
Description
Technical field
The invention belongs to engine manufacturing technology field, specially a kind of bimetallic dual-property titanium alloy integral blade disk manufacture
Method.
Background technique
Integral blade disk is the structure type for being made of one fan, compressor or turbine rotor blade and wheel disc [1], is state
The essential structure of inside and outside advanced aero engine.Currently, integral blade disk generallys use overall processing or welding method is fabricated,
Without processing tenon and tongue-and-groove.The advantages of this overall structure, is: wheel rim radial height, thickness and the blade original tenon portion of leaf dish
Position size can greatly reduce, and weight loss effect is obvious；The structure of engine rotor part is greatly simplified；Eliminate separate structure tenon
The bleed loss of gas in root portion gap；Avoid blade and wheel disc [1] assembly it is improper caused by fretting wear, crackle and
Locking plate damages bring failure, to be conducive to improve engine operating efficiency, reliability is further promoted.
It is dissimilar material that bimetallic dual-property integral blade disk, which is characterized by blade and wheel disc [1], meets different clothes respectively
Labour demand, to play the respective performance advantage of dissimilar material to a greater degree, e.g., alloy used in blade can either be higher
At a temperature of work and density is smaller, to further mitigate the weight of entire leaf dish.The application of new type high temperature titanium alloy, can
It works under the conditions of bigger temperature gradient and stress gradient, meets the requirement of the higher thrust ratio of engine of new generation.
The linear friction welding (FW) of domestic and international bimetallic dual-property titanium alloy integral blade disk manufacturing method, diffusion welding (DW), heat etc. at present
Static pressure diffusion welding (DW) or powder feeding formula laser gain material manufacturing method.Wherein, linear friction Welding is very big to the degree of dependence of equipment, weldering
The effect, the precision that connect are heavily dependent on the ability of equipment, and welding tooling is complicated, at high cost.Diffusion welding method faces
Difficult, connector consistency of pressurizeing controls and the technical problems such as non-destructive testing, and Blisk is complicated, need to be added using special
Pressure means, it is big that technique implements technical difficulty.Heat iso-hydrostatic diffusion welding technical maturity is relatively low, need to solve reliable soldering and sealing
Or jacket, special process measure need to be taken to ensure the reliable implementation of hot isostatic pressing.In addition, structure need to be whole when due to diffusion welding (DW)
Body undergoes Thermal Cycle process, also needs the heat treating regime matching problem for solving Thermal Cycle and material, avoids thermal cycle
The adverse effect caused by basis material.Powder feeding formula laser gain material manufacturing method there are powder at high cost, powder metallurgy matter
The problems such as amount and manufacturing process aoxidize makes metallurgical quality and mechanical properties decrease.
Summary of the invention
Object of the present invention is to propose a kind of bimetallic dual-property titanium alloy entirety leaf for the deficiencies in the prior art
Disc manufacturing method.The technical scheme is that
Produce the titanium of different materials using electron beam fuse deposition increasing material manufacturing method on the basis of wheel disc forging first
Alloy vane blank；Then final to realize bimetallic dual-property titanium alloy using machining or Electrolyzed Processing to design size
The manufacture of integral blade disk, method includes the following steps:
1) silk material is made through forging rolling and drawing in the titanium alloy rod bar of blade, silk material diameter is 0.6mm~2.0mm, silk
Material radius of curvature is not less than 60 times of silk material diameter, the content O≤0.2%, N≤0.05%, H of N, H, O interstitial element in silk material
≤ 0.01%, the pivot cellulose content in wire composition is before manufacturing dual alloy dual-property titanium alloy integral blade disk through electron beam fuse
Deposition increasing material manufacturing technique and structure property verification experimental verification simultaneously meet design requirement；
2) according to the blade quantity of design requirement, on wheel disc forging stock using machining process processed on disk edge it is convex
Platform, arc transition between boss and boss, boss height are 2~4mm, and boss quantity is consistent with blade quantity, and projection width
With quasi- increasing material manufacturing blade blank equivalent width；Boss upper surface as deposition increasing material manufacturing basis is plane；
3) the titanium alloy wheel disc after processing boss is installed on the numerical control table, NC table of electron beam fuse increasing material manufacturing equipment；
Set electron beam fuse deposition process parameters: for beam power as 0.6~6KW, electron beam movement speed is 2mm/s~20mm/
S, wire feed angle is between 40 °~70 °, and wire feed rate is 5mm/s~30mm/s, lift height 0.4-2.0mm, and vacuum degree is small
In 5 × 10-2Pa.According to blade three-dimensional digital model, the layer-by-layer fuse accumulation molding blade blank based on boss.Silk material is accurate
It is sent into electron beam molten bath, silk end center and molten bath centre distance are less than 0.8mm.Symmetrical manufacture blade blank, until whole blades
Blank manufacture is completed.The direction of growth of blade blank remains opposite with gravity direction in manufacturing process.Deposit increasing material manufacturing
Blade blank temperature is controlled in the process, and blade blank boundary is kept not burnt down；
4) after the completion of blade blank increasing material manufacturing, bimetallic titanium alloy integral blade disk is placed in destressing in heat-treatment furnace and is moved back
Fire processing or ageing treatment or solid solution+ageing treatment or hip treatment；
5) bimetallic dual-property titanium is processed using five-axle number control machine tool or other processing methods after non-destructive testing is qualified
Alloy integral blade disk.
The wheel disc of the integral blade disk is forging technology manufacture, the titanium alloy material trade mark used in wheel disc is TC4, TC11, TC17,
One of TC25 or Ti60 alloy.
The titanium alloy material trade mark used in the blade of the integral blade disk is TC11, TC17, TC25, Ti60 or Ti2AlNb alloy
One of.
The operating temperature of blade material therefor is higher than the operating temperature of wheel disc material therefor, and wheel disc and blade material are taken
With may is that TC4+TC11, TC4+TC17, TC17+Ti60 or Ti60+Ti2AlNb.
When the fuse deposits, keep wire feed direction, electron beam moving direction and deposition growing direction flat in a geometry
In face.
When the fuse deposits, silk material is accurately sent into molten bath, and silk material center and molten bath centre deviation fluctuation range be 0~
0.5mm。
Bimetallic dual-property titanium alloy integral blade disk manufacturing method proposed by the present invention has the advantage that (1) vacuum ring
Metallurgical quality good mechanical property in border is excellent, in electron beam fuse deposition process in vacuum chamber vacuum degree 10-2Pa is hereinafter, true with material
Empty melting vacuum degree is in phase same level, and silk material impurity element control difficulty used is low, and in electron beam fuse deposition process
Material can be refined again, further decrease impurity content, so that the titanium alloy metallurgical quality of electron beam molten copper infiltration is excellent,
Mechanical property is suitable with forging；(2) high-efficient, electron beam fuse deposition efficiency is high, can achieve several Kg/h, increases much higher than laser
Material manufacturing method；(3) manufacturing cost is low, and silk material cost is between 500-1000 member/Kg, and corresponding metal powder cost exists
2000 yuan/Kg or more.
Attached drawing attached drawing
Fig. 1 wheel disc forging part
Fig. 2 electron beam fuse increasing material manufacturing goes out blade blank
Fig. 3 is the bimetallic dual-property titanium alloy integral blade disk after thermally treated and machining
Label declaration: 1- wheel disc；2- boss；3- blade blank；4- blade
Specific embodiment
Technical solution of the present invention is described in further detail below in conjunction with drawings and examples:
The method steps are as follows:
1) silk material is made through forging rolling and drawing in the titanium alloy rod bar of blade, silk material diameter is 0.6mm~2.0mm, silk
Material radius of curvature is not less than 60 times of silk material diameter, and silk material surface is without impurity such as greasy dirts, the content of N, H, O interstitial element in silk material
O≤0.2%, N≤0.05%, H≤0.01%, the pivot cellulose content in wire composition are whole in manufacture dual alloy dual-property titanium alloy
Increasing material manufacturing technique and structure property verification experimental verification are deposited through electron beam fuse before body leaf dish and meet design requirement；
2) it according to the blade quantity of design requirement, is processed on disk edge on wheel disc [1] forging stock using machining process
Boss 2 out, arc transition between boss 2 and boss 2,2 height of boss are 2~4mm, and 2 quantity of boss is consistent with blade quantity, and
2 width of boss and quasi- 3 equivalent width of increasing material manufacturing blade blank.2 upper surface of boss as deposition increasing material manufacturing basis is flat
Face；
3) the titanium alloy wheel disc 1 after processing boss 2 is installed on to the numerical control table, NC table of electron beam fuse increasing material manufacturing equipment
On；Set electron beam fuse deposition process parameters: beam power as 0.6~6KW, electron beam movement speed be 2mm/s~
20mm/s, wire feed angle between 40 °~70 °, wire feed rate be 5mm/s~30mm/s, lift height 0.4-2.0mm, very
Reciprocal of duty cycle is less than 5 × 10-2Pa.According to blade three-dimensional digital model, the layer-by-layer fuse accumulation molding blade blank 3 based on boss 2.
Guarantee that silk material is accurately sent into electron beam molten bath, silk end center and molten bath centre distance are less than 0.8mm.Each blade blank 3 deposits
2 upper surface of boss is first preheated using electronics beam scanning before increasing material manufacturing.Symmetrical manufacture blade blank 3, until whole blade blanks 3
Manufacture is completed.The direction of growth of blade blank 3 remains opposite with gravity direction in manufacturing process.Deposit increasing material manufacturing process
Middle 3 temperature of control blade blank keeps 3 boundary of blade blank not burnt down；
4) after the completion of 3 increasing material manufacturing of blade blank, bimetallic titanium alloy integral blade disk is placed in destressing in heat-treatment furnace
Annealing or ageing treatment or solid solution+ageing treatment or hip treatment；
5) to process bimetallic dual-property using five-axle number control machine tool or other processing methods after non-destructive testing is qualified whole
Body leaf dish.
Embodiment 1
Fig. 3 show a kind of bimetallic dual-property titanium alloy integral blade disk, and the titanium alloy integral blade disk is by wheel disc 1 and blade
Composition, 1 material of wheel disc are Ti60 titanium alloy, and blade material is Ti2AlNb alloy.Totally 60, blade, it is evenly distributed on 1 side of wheel disc
Edge.Wheel disc 1 is prepared using isothermal forging method, having a size of It is deposited using electron beam fuse and increases material method
Ti2AlNb blade is manufactured, blade height 60mm the steps include:
1) the Ti2AlNb alloy wire of diameter 1.6mm, N, H, O gap element in silk material are manufactured by hot rolling and drawing process
Content O≤0.2% of element, N≤0.05%, H≤0.01%；
2) 1 blank of Ti60 titanium alloy wheel disc is forged, and using the solid solution of Ti60 material standard heat treatment process and double annealing
Processing.Using numerical-control processing method, boss 2 shown in Fig. 1 are processed at forging 1 edge of Ti60 titanium alloy wheel disc, it is molten for electron beam
Silk deposition increasing material manufacturing blade blank 3 provides basal plane.Boss 2 width 10mm, length 50mm, 2 height 3mm of boss avoid electronics
When beam fuse deposits increasing material manufacturing blade blank [3], since the effect of stress causes to close on the deformation of blade blank 3；
3) the titanium alloy wheel disc 1 after processing boss 2 is installed on to the numerical control table, NC table of electron beam fuse increasing material manufacturing equipment
On；Reach 5 × 10 to vacuum degree in vacuum chamber-2When Pa or less, electron beam fuse deposition process parameters: electronics beam acceleration electricity are set
Press 60KV, line 35mA, electron beam movement speed 10mm/s, scan amplitude 4mm, 50 ° of wire feed angle, wire feed rate 20mm/s,
Lift height 1.6mm；According to blade three-dimensional digital model, the layer-by-layer fuse accumulation molding blade blank 3 based on boss 2.Its
In, point-blank, silk material and molten bath centre distance are less than 0.5mm for silk material feeding direction and electron beam moving direction.Deposition
When increasing material manufacturing blade blank 3,3 direction of growth of blade blank is opposite with gravity direction always.One blade blank 3 of band has manufactured
Cheng Hou, wheel disc 1 rotate 180 ° and symmetrically manufacture another blade blank 3；
4) the bimetallic titanium alloy integral blade disk is placed in vacuum heat treatment furnace after the completion of 3 increasing material manufacturing of blade blank
750 DEG C of heat preservation 4h, argon filling are cooling；
5) to using X-ray and fluorescent inspection method to examine internal and surface defect after blade blank [3] roughing, through nothing
Bimetallic dual-property integral blade disk design size is processed using five-axle number control machine tool after damage detection is qualified.After processing is completed, leaf
The Tolerance of Degree of position of piece section long-pending folded axle is 0.12-0.3mm, and blade twist tolerance is ± 5 '~± 15 '；Blade tip run-out tolerance
For 0.3mm；The surface profile tolerance of runner is 0.2~0.3mm；Axial, radial reference face squareness tolerance is 0.02mm；Through
Hand polish and vibration finishing handle rear blade surface roughness≤0.4 μm；Then leaf is handled using laser-impact process strengthening
Piece surface.It is finally completed the manufacture of bimetallic dual-property integral blade disk.
Claims (6)
1. a kind of bimetallic dual-property titanium alloy integral blade disk manufacturing method, which is characterized in that first on wheel disc [1] forging basis
On the titanium alloy blade blanks [3] of different materials produced using electron beam fuse deposition increasing material manufacturing method；Then mechanical to add
Work or Electrolyzed Processing are to design size, the final manufacture for realizing bimetallic dual-property titanium alloy integral blade disk, this method include with
Lower step:
1) silk material is made through forging rolling and drawing in the titanium alloy rod bar of blade, silk material diameter is 0.6mm~2.0mm, in silk material
N, content O≤0.2% of H, O interstitial element, N≤0.05%, H≤0.01%；
2) according to the blade quantity of design requirement, on wheel disc [1] forging stock using machining process processed on disk edge it is convex
Platform [2], arc transition between boss [2] and boss [2], boss [2] are highly 2~4mm, boss [2] quantity and blade quantity
Unanimously, and boss [2] width and quasi- increasing material manufacturing blade blank [3] equivalent width；
3) the titanium alloy wheel disc [1] after processing boss [2] is installed on to the numerical control table, NC table of electron beam fuse increasing material manufacturing equipment
On；Set electron beam fuse deposition process parameters: beam power as 0.6~6KW, electron beam movement speed be 2mm/s~
20mm/s, wire feed angle between 40 °~70 °, wire feed rate be 5mm/s~30mm/s, lift height 0.4-2.0mm, very
Reciprocal of duty cycle is less than 5 × 10-2Pa, according to blade three-dimensional digital model, the layer-by-layer fuse accumulation molding blade blank based on boss [2]
[3], silk material is accurately sent into electron beam molten bath, and silk end center and molten bath centre distance are less than 0.8mm, symmetrically manufacture blade blank
[3], up to the direction of growth of blade blank [3] in whole blade blanks [3] manufacture completions, manufacturing process remains and gravity
It is contrary, blade blank [3] temperature is controlled during deposition increasing material manufacturing, blade blank [3] boundary is kept not burnt down；
4) after the completion of blade blank [3] increasing material manufacturing, bimetallic titanium alloy integral blade disk is placed in destressing in heat-treatment furnace and is moved back
Fire processing or ageing treatment or solid solution+ageing treatment or hip treatment；
5) bimetallic dual-property entirety leaf is processed using five-axle number control machine tool or other processing methods after non-destructive testing is qualified
Disk.
2. a kind of bimetallic dual-property titanium alloy integral blade disk manufacturing method according to claim 1, which is characterized in that should
The wheel disc [1] of integral blade disk is forging technology manufacture, and the titanium alloy material trade mark used in wheel disc [1] is TC4, TC11, TC17, TC25
Or one of Ti60 alloy.
3. a kind of bimetallic dual-property titanium alloy integral blade disk manufacturing method according to claim 1, which is characterized in that should
The titanium alloy material trade mark used in the blade of integral blade disk is one of TC11, TC17, TC25, Ti60 or Ti2AlNb alloy.
4. a kind of bimetallic dual-property titanium alloy integral blade disk manufacturing method according to claim 1, which is characterized in that leaf
The operating temperature of piece material therefor is higher than the operating temperature of wheel disc [1] material therefor, and the collocation of wheel disc [1] and blade material can
To be: TC4+TC11, TC4+TC17, TC17+Ti60 or Ti60+Ti2AlNb.
5. a kind of bimetallic dual-property titanium alloy integral blade disk manufacturing method according to claim 1, which is characterized in that institute
When stating fuse deposition, keep wire feed direction, electron beam moving direction and deposition growing direction in a geometrical plane.
6. a kind of bimetallic dual-property titanium alloy integral blade disk manufacturing method according to claim 1, which is characterized in that institute
When stating fuse deposition, silk material is accurately sent into electron beam molten bath, and silk end center and molten bath centre distance are less than 0.5mm.
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