CN104404420A - Vacuum heat treatment deformation control method of titanium alloy welding member with large window - Google Patents
Vacuum heat treatment deformation control method of titanium alloy welding member with large window Download PDFInfo
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- CN104404420A CN104404420A CN201410592247.7A CN201410592247A CN104404420A CN 104404420 A CN104404420 A CN 104404420A CN 201410592247 A CN201410592247 A CN 201410592247A CN 104404420 A CN104404420 A CN 104404420A
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- component
- support plate
- heat treatment
- large window
- titanium alloy
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Arc Welding In General (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention discloses a vacuum heat treatment deformation control method of a titanium alloy welding member with a large window. The method comprises the following steps: 1, respectively arranging protection supporting discs at two end portions of the member, and connecting and supporting through a column and a pull rod; 2, prescribing the placement mode of the member in a furnace according to the structural characteristics of the member, and downward vertically placing the long length end of a closed cylinder; 3, introducing the member into the furnace at room temperature, pre-evacuating, heating to a predetermined temperature, carrying out heat insulation, and carrying out furnace cooling; and 4, vertically dismounting the supporting discs when the supporting discs are cooled and have a certain gap to the cylinder of the member. Compared with deformation control methods of special dies, the method adopting the supporting discs at two ends and adopting pull rod connection shape maintenance in the middle has the advantages of simple structure, easy operation, control of the ovality and flexure deformation of the member, and avoiding of repeated heating calibration.
Description
Technical field
The invention belongs to a kind of titanium alloy vacuum heat treating method, be specifically related to a kind of titanium alloy welding component vacuum heat treatment deformation control method opening large window, it is applicable to out the thin-wall titanium alloy class part of large window.
Background technology
Space product being applied increasingly extensive titanium alloy member, is must offer large window for the ease of installing large number quipments in inside on the one hand; On the other hand, by the restriction of enclosing circle equipment and titanium alloy plate book size, component is formed by the shaping cylindrical shell Combination Welding of multiple circle circle, and component comprises multiple tracks welding of longitudinal seam and circumferential seam and welding residual stress is large, needs to reach by stress relief annealing the object preventing from being out of shape and ftractureing.Easily complex deformation is there is in this class A of geometric unitA when thermal treatment, in current production reality, only by traditional heat treatment process parameter optimization, can not the distortion of effective control member different sites, and therefore can not meet follow-up mach requirement.Due to the restriction of titanium alloy welding this body structure of component and shape of opening large window, use the hot school shape operational cycle of monolithic mold long and inconvenient, and cost intensive.
Summary of the invention
The object of this invention is to provide a kind of titanium alloy welding component vacuum heat treatment deformation control method opening large window, it can effectively control thin-walled, open the heat treatment deformation of the titanium alloy welding component of large window, component is made to meet follow-up mach requirement, and easy and simple to handle.
The present invention is achieved in that a kind of titanium alloy welding component vacuum heat treatment deformation control method opening large window, and it comprises the steps,
The first step: protection support plate is installed at component two ends, support plate adopts column to connect and supports, and column upper mounting boss, to reduce the pressure of support plate to component, support plate outside dimension and component internal diameter size leave gap, to ensure that dimensional fits is good under heating and thermal insulation state;
Second step: component is entered stove, selects the longer one end of closed barrel body length vertically to place, to reduce the distortion that member dead weight causes down;
3rd step: component selects room temperature to enter stove, forvacuum, and workpiece can be prevented to be oxidized in heat-processed, heats up after reaching preset temperature and is incubated, then furnace cooling;
4th step: when cooling afterwards when support plate and have gap with component cylindrical shell, then dismantled by support plate, support plate should vertically take out, and avoids the collision to component cylindrical shell.
The mode that described the first step component two ends protection support plate and component are fixed is for adopt column pull bar to be connected; fixed by the pull-rod nut at upper support plate place; protection support plate is ring structure and leaves lightening hole; support plate weight can be reduced; the cutting edge portion of protection support plate has gradient; be convenient to support plate install; column pull bar there is installation base; can support support plate; reduce support plate to the pressure of component; support plate can the circularity of accurate control member cylindrical shell, by the connection with column, can prevent out the generation of the component cylindrical shell deflection deformation of large window.
During described 3rd step vacuum heat treatment, forvacuum degree reaches 1 ~ 5 × 10
-2pa, prevents component to be oxidized in heat-processed; Rise to 700 DEG C with the speed of 2 ~ 3 DEG C/min, keep vacuum tightness to be 1 ~ 5 × 10
-2pa; Component is at 700 DEG C of insulation 1.5h, and then cool to the furnace and be less than 200 DEG C and close diffusion pump, component is coming out of the stove lower than when 80 DEG C.
Advantage of the present invention is, 1) and adopt support plate to add the method for column, relative to particular manufacturing craft controlling distortion, structure is simple, easy handling, can reach the object controlling to open large window widget deflection deformation; 2) adopt low temperature to enter stove, the heating process of slowly heating, reduce out the thermal stresses that the intensification of large window widget produces, reduce the generation of distortion; 3) by specified vacuum degree, heat-up rate, holding temperature and time, be conducive to realizing the higher force performance of component and the best combination compared with small deformation; 4) based on the support plate of grasp and the rule of component thermal expansion, adopt by the object of support plate control to component cylinder roundness; 5) by the vacuum heat treatment of band frock, component reaches the dual purpose of annealing and school shape, and the welding assembly solving out large window cracks the difficult problem with deflection deformation.
Accompanying drawing explanation
Fig. 1 is the structural representation opening the titanium alloy welding component of large window in the embodiment of the present invention;
The protection support plate schematic diagram that Fig. 2 uses for the titanium alloy welding component opening large window in the embodiment of the present invention;
The frock schematic diagram that the column that Fig. 3 uses for the titanium alloy welding component opening large window in the embodiment of the present invention is connected with support plate.
Fig. 4 be in the embodiment of the present invention open the titanium alloy welding component of large window enter stove putting position figure.
In figure, 1 upper support plate, 2 boss, 3 pull bars, 4 lower support plates.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail:
Open a titanium alloy welding component vacuum heat treatment deformation control method for large window, comprise the steps:
The first step: protection support plate is installed at component two ends, support plate adopts column to connect and supports, and column upper mounting boss, to reduce the pressure of support plate to component, support plate outside dimension and component internal diameter size leave certain interval, to ensure that dimensional fits is good under heating and thermal insulation state;
Second step: the constructional feature regulation component according to component enters stove modes of emplacement, selects the longer one end of closed barrel body length vertically to place, to reduce the distortion that member dead weight causes down;
3rd step: component selects room temperature to enter stove, forvacuum, and workpiece can be prevented to be oxidized in heat-processed, heats up after reaching preset temperature and is incubated, then furnace cooling;
4th step: when cooling afterwards when support plate and have certain interval with component cylindrical shell, then support plate is dismantled.Support plate should vertically take out, and avoids the collision to component cylindrical shell.
During described 3rd step vacuum heat treatment, forvacuum degree reaches (1 ~ 5) × 10
-2pa, prevents component to be oxidized in heat-processed; Rise to 700 DEG C with the speed of 2 ~ 3 DEG C/min, keep vacuum tightness to be (1 ~ 5) × 10
-2pa; Component is at 700 DEG C of insulation 1.5h, and then cool to the furnace and be less than 200 DEG C and close diffusion pump, component is coming out of the stove lower than when 80 DEG C.
The mode that component two ends protection support plate and component are fixed, for adopt column pull bar to be connected, is fixed by the pull-rod nut at upper support plate place.
Protection support plate is ring structure and leaves lightening hole, can reduce support plate weight.
The cutting edge portion of support plate has gradient, is convenient to support plate and installs.
Column pull bar there is installation base, can support support plate, reduce support plate to the pressure of component.
Support plate can the circularity of accurate control member cylindrical shell, by the connection with column, can prevent out the generation of the component cylindrical shell deflection deformation of large window.
For the titanium alloy welding component vacuum heat treatment Deformation control opening large window of Fig. 1, its geomery is shown in accompanying drawing 1, and by BT20 titanium alloy plate circle circle welding forming, component overall length is 1200mm, cross section maximum diameter is 360mm, there are many welding of longitudinal seam and circumferential seams.Require before and after vacuum heat treatment that roundness deformation is less than 1mm, component linearity is less than 1.5mm.Performance σ b >=930MPa is met, the requirement of δ 5 >=10%, outward appearance non-oxidation and pollution with the test piece of stove material.
Embodiment is undertaken by following processing step: the first step 4 and straight line degree measurement record: measure component cylindrical shell level and vertical direction outside dimension (φ 360 dimension), (horizontal direction namely determined by four long and short dash line and the outside dimension of vertical direction in 90 ° with it), measures the integrated straight dimension of component cylindrical shell.Second step: protection support plate is installed at component two ends, and support plate structure formation is as Fig. 2.Support plate adopts column to connect and supports, and column upper mounting boss, can support support plate, reduces support plate to the pressure of component, as Fig. 3.Support plate outside dimension and component internal diameter size leave certain interval (radial reserved 1.5mm), to ensure that dimensional fits is good under heating and thermal insulation state.3rd step: the constructional feature regulation component according to component enters stove modes of emplacement, selects the longer one end of closed barrel body length vertically to place, to reduce the distortion that member dead weight causes, as Fig. 4 down.4th step component vacuum heat treatment: forvacuum degree reaches (1 ~ 5) × 10
-2pa, prevents component to be oxidized in heat-processed; Rise to 700 DEG C with the speed of 2 ~ 3 DEG C/min, keep vacuum tightness to be (1 ~ 5) × 10
-2pa; Component is at 700 DEG C of insulation 1 ~ 2h, and then cool to the furnace and be less than 200 DEG C and close diffusion pump, component is coming out of the stove lower than when 80 DEG C.Preferred processing mode is as follows: forvacuum degree reaches 3 × 10
-2pa, prevents component to be oxidized in heat-processed; Rise to 700 DEG C with the speed of 2 DEG C/min, keep vacuum tightness to be 3 × 10
-2pa; Component is at 700 DEG C of insulation 1.5h, and then cool to the furnace and be less than 200 DEG C and close diffusion pump, component is coming out of the stove lower than when 80 DEG C.5th step: when cooling afterwards when support plate and have certain interval with component cylindrical shell, then support plate is dismantled.Support plate should vertically take out, and avoids the collision to component cylindrical shell.The quality examination of the 6th step component: measure the external diameter after component vacuum heat treatment and linearity size and the performance with stove test piece, check appearance color, acquisition meets the component of inter process dimensional requirement and performance requriements.
As shown in Figure 2, the cutting edge portion of upper and lower end protection support plate has gradient, outward-dipping by component body end surface female end, is convenient to installation and removal.
As shown in Figure 3, the protruding member part of upper and lower end protection support plate is convenient to the dismounting of support plate, and the protuberance of column is convenient to be fixed by nut.
Claims (3)
1. open a titanium alloy welding component vacuum heat treatment deformation control method for large window, it is characterized in that: it comprises the steps,
The first step: protection support plate is installed at component two ends, support plate adopts column to connect and supports, and column upper mounting boss, to reduce the pressure of support plate to component, support plate outside dimension and component internal diameter size leave gap, to ensure that dimensional fits is good under heating and thermal insulation state;
Second step: component is entered stove, selects the longer one end of closed barrel body length vertically to place, to reduce the distortion that member dead weight causes down;
3rd step: component selects room temperature to enter stove, forvacuum, and workpiece can be prevented to be oxidized in heat-processed, heats up after reaching preset temperature and is incubated, then furnace cooling;
4th step: when cooling afterwards when support plate and have gap with component cylindrical shell, then dismantled by support plate, support plate should vertically take out, and avoids the collision to component cylindrical shell.
2. a kind of titanium alloy welding component vacuum heat treatment deformation control method opening large window as claimed in claim 1, it is characterized in that: the mode that described the first step component two ends protection support plate and component are fixed is for adopt column pull bar to be connected, fixed by the pull-rod nut at upper support plate place, protection support plate is ring structure and leaves lightening hole, support plate weight can be reduced, the cutting edge portion of protection support plate has gradient, be convenient to support plate install, column pull bar there is installation base, can support support plate, reduce support plate to the pressure of component, support plate can the circularity of accurate control member cylindrical shell, by the connection with column, the generation of the component cylindrical shell deflection deformation of large window can be prevented out.
3. a kind of titanium alloy welding component vacuum heat treatment deformation control method opening large window as claimed in claim 1, it is characterized in that: during described 3rd step vacuum heat treatment, forvacuum degree reaches 1 ~ 5 × 10
-2pa, prevents component to be oxidized in heat-processed; Rise to 700 DEG C with the speed of 2 ~ 3 DEG C/min, keep vacuum tightness to be 1 ~ 5 × 10
-2pa; Component is at 700 DEG C of insulation 1.5h, and then cool to the furnace and be less than 200 DEG C and close diffusion pump, component is coming out of the stove lower than when 80 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410592247.7A CN104404420B (en) | 2014-10-29 | 2014-10-29 | A kind of titanium alloy welding component vacuum heat deformation control method for opening big window |
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| CN201410592247.7A CN104404420B (en) | 2014-10-29 | 2014-10-29 | A kind of titanium alloy welding component vacuum heat deformation control method for opening big window |
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| CN104404420A true CN104404420A (en) | 2015-03-11 |
| CN104404420B CN104404420B (en) | 2018-07-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106381373A (en) * | 2016-11-25 | 2017-02-08 | 沈阳黎明航空发动机(集团)有限责任公司 | Correction method and device for plate type multilayered structure titanium alloy parts |
| CN112795766A (en) * | 2020-12-09 | 2021-05-14 | 北京星航机电装备有限公司 | Annealing and shape correcting method for high-temperature alloy welding part |
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| CN103834883A (en) * | 2012-11-20 | 2014-06-04 | 北京航星机器制造公司 | Heat treatment deformation control method of thin-wall saddle-shaped aluminum alloy casting |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106381373A (en) * | 2016-11-25 | 2017-02-08 | 沈阳黎明航空发动机(集团)有限责任公司 | Correction method and device for plate type multilayered structure titanium alloy parts |
| CN112795766A (en) * | 2020-12-09 | 2021-05-14 | 北京星航机电装备有限公司 | Annealing and shape correcting method for high-temperature alloy welding part |
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| CN104404420B (en) | 2018-07-13 |
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