CN109175179A - A kind of high temperature alloy forging process for fuel pulling method - Google Patents
A kind of high temperature alloy forging process for fuel pulling method Download PDFInfo
- Publication number
- CN109175179A CN109175179A CN201811410369.4A CN201811410369A CN109175179A CN 109175179 A CN109175179 A CN 109175179A CN 201811410369 A CN201811410369 A CN 201811410369A CN 109175179 A CN109175179 A CN 109175179A
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- forging
- blank
- mold
- type groove
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
Abstract
A kind of high temperature alloy forging process for fuel pulling method, being used to forge diameter is D1, length L1Cylindrical structure forging comprising following steps: step A, interception blank are placed in heating furnace and heat and keep the temperature, blank diameter D0, length L0.Step B, one mold is provided, the mold is composed of symmetrically arranged upper die and lower die, the mold that combination is formed includes a prismatic type groove and an arc-shaped type groove, blank after step A heat preservation is pulled out using the mold, firstly, in the prismatic type groove, blank is forged and pressed by 90 ° of spiral overturning chargings first, highly by D0It is depressed intoThen, in the prismatic type groove, blank is forged and pressed by the overturning charging of 45 ° of spirals, highly byIt is depressed into D1, finally, polygonal cross-section is rolled into circular cross-section in arc-shaped type groove, make diameter D1.Complete the forging of the forging.High temperature alloy forging process for fuel provided by the present invention pulls out method, can significantly improve the uniformity of material deformation.
Description
Technical field
The present invention relates to a kind of technical field of forging, especially a kind of high temperature alloy axis that can be improved aero-engine
The draw out method of forging or disk bar one forging bar portion grain uniformity.
Background technique
In manufacturing fields such as automobile, aerospace, ships using very extensive, material is covered for shaft forgings or disk bar integral piece
Structural steel, titanium alloy, high temperature alloy etc..The all too busy to get away pulling of forging and molding of shaft forgings, dish axle integral piece.Pulling is to make metal
The basic forging process that cross-sectional area reduces, length increases.Wherein, forged shaft shapes its technical process are as follows: and blanking →
Heating → draw out；The technical process of dish axle one forging forming are as follows: blanking → heating → forming bar portion (pull out by forging
It is long) → forming pan portion.Flat anvil (hammer anvil that the scope of attack is plane) is to forge most simple most common tool, but carry out on flat anvil
One significant disadvantage of draw out is exactly that the uniformity of forging bar portion crystal grain is difficult to control.Through analyzing, this defect is mainly
It is related with the method for forging as caused by deforming unevenly.Fig. 1 is typical circular cross-section bar flat-anvils stretching Principle of Process
Schematic diagram, shown in Figure 1, blank is forged between upper and lower hammer anvil and is constantly overturn, and section is by initial circular cross-section
Square-section is forged into, cubic pulling is then carried out, finally further through chamfered edge and round as a ball becomes round section.In forming process,
Bar sectional dimension reduces, elongated lengthwise.Fig. 2 is cubic pulling stage cross-sectional deformation Distribution Principle schematic diagram in Fig. 1,
It is shown in Figure 2, it rubs since flat anvil and forge piece blank reheating surface exist, the friction effects distribution of stress causes not same district
Area deformation degree is uneven.Easily-deformable area I, free deformation zone II and stagnant zone III can be successively divided by deflection size.Its
Middle stagnant zone III deflection is minimum, and free deformation zone II deflection is smaller, and easily-deformable area I deflection is maximum.The unevenness of deformation
Even influence Dynamic Recrystallization, to influence the uniformity of crystal grain, especially free deformation zone II and stagnant zone III become
Shape amount is easy to fall into the critical strain area of metal, causes the abnormal growth of crystal grain, increases the inhomogeneities of crystal grain, so as to
Final forging quality is had an impact.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of high temperature alloy forging process for fuel to pull out method, to be reduced or avoided
The problem of being formerly mentioned.
In order to solve the above technical problems, the present invention provides a kind of high temperature alloy forging process for fuel to pull out method, it is used to forge
Making diameter is D1, length L1Cylindrical structure forging comprising following steps:
Step A, interception blank, which is placed in heating furnace, to be heated and keeps the temperature, and the blank intercepted is cylindrical structure, diameter D0、
Length is L0。
Step B provides a mold, and the mold is composed of symmetrically arranged upper die and lower die, combines formation
The mold includes a prismatic type groove and an arc-shaped type groove, and the top and bottom of the prismatic type groove are symmetrical arranged oriented
Interior arc convex is pulled out the blank after step A heat preservation using the mold, the first stage, in the prismatic type groove
It is interior, blank is forged and pressed by 90 ° of spiral overturning chargings first, the length that forging is axially sent into every time is equal to mold thickness B, high
Degree is by D0It is depressed intoThus circular cross-section is forged into the polygonal cross-section by multi-section circular arc and rectilinear(-al).Second-order
Section is forged and pressed blank by 45 ° of spiral overturning chargings, the length etc. that forging is axially sent into every time in the prismatic type groove
In mold thickness B, highly byIt is depressed into D1, obtain the polygonal cross-section being made of more circular arcs and straightway.Finally, in circle
Polygonal cross-section is rolled into circular cross-section in arc type groove, makes diameter D1.Complete the forging of the forging.
Preferably, in step, the size of the blank intercepted meets following condition:
D0Meet simultaneouslyWithCondition, furthermore D0 2/D1 2Value less than 3.It
L is obtained according to isometric conversion afterwards0Numerical value.
Preferably, in step, the size of the blank intercepted meets following condition: D0=1.5D1,
Preferably, in stepb, the size of the arc convex is calculated according to following formula:
In above formula
α is the cornerite of the prismatic type groove.
Preferably, α chooses within the scope of 110-140 °.
Preferably, α is set as 120 °.
Preferably, in stepb, thickness B=(0.4~0.8) D of the mold0,。
Preferably, in step, the blank is placed in time of the temperature and heat preservation that heat in heating furnace according to being used
The forging technology specification of material selected.
Preferably, in stepb, the prismatic type groove and the arc-shaped type groove are respectively two before and after with the mold
The junction of a end face is provided with knuckle R.
Preferably, the knuckle R is designed by the general norm requirement of design of forging die.
A kind of high temperature alloy forging process for fuel provided by the present invention pulls out method, the forging as pulling process axis/bar
Apparent " stagnant zone " be there will be no in the cross section of part, therefore can also significantly improve the uniformity of material deformation, to reach
To the purpose for improving grain uniformity.In addition, using draw out method of the invention, the deep enough blank core of deformation energy makes
Core has biggish deformation, is conducive to the microstructural defects for eliminating core.In conclusion the present invention is relative to prior art,
With apparent technical effect, defect present in prior art is overcome.
Detailed description of the invention
The following drawings are only intended to schematically illustrate and explain the present invention, not delimit the scope of the invention.Wherein,
Fig. 1 Fig. 1 is typical circular cross-section bar flat-anvils stretching Principle of Process schematic diagram；
Fig. 2 is cubic pulling stage cross-sectional deformation Distribution Principle schematic diagram in Fig. 1；
Fig. 3 is that a kind of high temperature alloy forging process for fuel of a specific embodiment according to the present invention pulls out the process original of method
Manage schematic diagram；
Fig. 4 is the principle schematic diagram of the mold of Fig. 3；
Fig. 5 is the blank of Fig. 3 and the principle schematic diagram of forging；
Fig. 6 is the stereochemical structure schematic illustration of the mold of Fig. 4；
Fig. 7 is using process shown in Fig. 3 to forging cross section equivalent strain Distribution Principle schematic diagram after forging pulling.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, this hair of Detailed description of the invention is now compareed
Bright specific embodiment.Wherein, identical component uses identical label.
Fig. 3 is that a kind of high temperature alloy forging process for fuel of a specific embodiment according to the present invention pulls out the process original of method
Manage schematic diagram；Fig. 4 is the principle schematic diagram of the mold of Fig. 2；Wherein left side is schematic view of the front view, and right side is left side
A-A and B-B the schematic diagram of the section structure, the xy coordinate direction identified in Fig. 4 is for the schematic view of the front view on the left of indicating
Coordinate system, 5 for Fig. 3 blank and forging principle schematic diagram；Fig. 6 is the stereochemical structure principle signal of the mold of Fig. 4
Figure.Referring to shown in Fig. 3-6, the present invention provides a kind of high temperature alloy forging process for fuel to pull out method, and the forging is cylindrical structure,
Diameter is D1, length L1, described method includes following steps:
Step A, interception blank, which is placed in heating furnace, to be heated and keeps the temperature, and the blank intercepted is cylindrical structure, diameter D0、
Length is L0, the size of the blank intercepted meets following formula:
D0It should meet simultaneously firstWithCritical condition, can make so every time
Critical strain amount needed for the deflection of forging and stamping is above metal dynamic recrystallization.On this basis, D0 2/D1 2Value should be less than
3.0.It is last that L is obtained according to isometric conversion0Numerical value, such as work as D0=1.5D1When,
The time that the blank is placed in the temperature and heat preservation that heat in heating furnace can be according to the forging skill of used material
Art specification is selected.
Step B provides a mold, and the mold is composed of symmetrically arranged upper die and lower die, combines formation
The mold includes a prismatic type groove and an arc-shaped type groove, as shown in the mark " calculated according to parametric equation " in Fig. 4,
Inside arc convex is symmetrically arranged at the top and bottom of the prismatic type groove, the size of the arc convex is according to following public affairs
Formula calculates:
In above formula
α be the prismatic type groove cornerite (α chooses within the scope of 110-140 °, in a preferred embodiment, α setting
It is 120 °)；
Thickness B=(0.4~0.8) D of the mold0,；The prismatic type groove and the arc-shaped type groove and the mold
Former and later two end faces knuckle R by design of forging die general norm requirement design.
Blank after step A heat preservation is pulled out using the mold, it is the first stage, right in the prismatic type groove
Blank is forged and pressed by the overturning charging of 90 ° of spirals first, and the length that forging is axially sent into every time is equal to mold thickness B, highly by
D0It is depressed intoThus circular cross-section is forged into the polygonal cross-section by multi-section circular arc and rectilinear(-al).Second stage,
In the prismatic type groove, blank is forged and pressed by 45 ° of spiral overturning chargings, the length that forging is axially sent into every time is equal to mold
Thickness B, highly byIt is depressed into D1, obtain the polygonal cross-section being made of more circular arcs and straightway.Finally, in arc-shaped type
Polygonal cross-section is rolled into circular cross-section in slot, makes diameter D1.Complete the forging of the forging.
Fig. 7 is using process shown in Fig. 3 to forging cross section equivalent strain distribution schematic diagram after forging pulling, referring to Fig. 7
Shown, using above-mentioned draw out method provided by the present invention, the cross section for pulling out forging as process axis/bar will not
There is apparent " stagnant zone " again, therefore can also significantly improve the uniformity of material deformation, so that it is uniform to reach raising crystal grain
The purpose of property.In addition, using draw out method of the invention, the deep enough blank core of deformation energy makes core have biggish change
Shape is conducive to the microstructural defects for eliminating core.In conclusion the present invention has apparent technology relative to prior art
Effect overcomes defect present in prior art.
It will be appreciated by those skilled in the art that although the present invention is described in the way of multiple embodiments,
It is that not each embodiment only contains an independent technical solution.So narration is used for the purpose of for the sake of understanding in specification,
The skilled in the art should refer to the specification as a whole is understood, and by technical solution involved in each embodiment
Regard as and can be combined with each other into the modes of different embodiments to understand protection scope of the present invention.
The foregoing is merely the schematical specific embodiment of the present invention, the range being not intended to limit the invention.It is any
Those skilled in the art, made equivalent variations, modification and combination under the premise of not departing from design and the principle of the present invention,
It should belong to the scope of protection of the invention.
Claims (10)
1. a kind of high temperature alloy forging process for fuel pulls out method, being used to forge diameter is D1, length L1Cylindrical structure forging,
It is characterized in that, it includes the following steps:
Step A, interception blank, which is placed in heating furnace, to be heated and keeps the temperature, and the blank intercepted is cylindrical structure, diameter D0, length
For L0。
Step B provides a mold, and the mold is composed of symmetrically arranged upper die and lower die, combines the described of formation
Mold includes a prismatic type groove and an arc-shaped type groove, is symmetrically arranged at the top and bottom of the prismatic type groove inside
Arc convex pulls out the blank after step A heat preservation using the mold, the first stage, right in the prismatic type groove
Blank is forged and pressed by the overturning charging of 90 ° of spirals first, and the length that forging is axially sent into every time is equal to mold thickness B, highly by
D0It is depressed intoThus circular cross-section is forged into the polygonal cross-section by multi-section circular arc and rectilinear(-al).Second stage,
In the prismatic type groove, blank is forged and pressed by 45 ° of spiral overturning chargings, the length that forging is axially sent into every time is equal to mold
Thickness B, highly byIt is depressed into D1, obtain the polygonal cross-section being made of more circular arcs and straightway.Finally, in arc-shaped type
Polygonal cross-section is rolled into circular cross-section in slot, makes diameter D1.Complete the forging of the forging.
2. the method according to claim 1, wherein in step, the size of the blank intercepted meets as follows
Condition:
D0Meet simultaneouslyWithCondition, furthermore D0 2/D1 2Value less than 3.Root later
L is obtained according to isometric conversion0Numerical value.
3. the method according to claim 1, wherein in step, the size of the blank intercepted meets as follows
Condition: D0=1.5D1,
4. the method according to claim 1, wherein in stepb, the size of the arc convex is according to as follows
Formula calculates:
In above formula
α is the cornerite of the prismatic type groove.
5. according to the method described in claim 4, it is characterized in that, α chooses within the scope of 110-140 °.
6. according to the method described in claim 4, it is characterized in that, α is set as 120 °.
7. the method according to claim 1, wherein in stepb, the thickness B=of the mold (0.4~
0.8)D0,.
8. the method according to claim 1, wherein in step, the blank is placed in be heated in heating furnace
The time of temperature and heat preservation is selected according to the forging technology specification of used material.
9. the method according to claim 1, wherein in stepb, the prismatic type groove and the arc-shaped type
Slot is provided with knuckle R in the junction of former and later two end faces with the mold respectively.
10. according to the method described in claim 9, it is characterized in that, the knuckle R is wanted by the general norm of design of forging die
Seek design.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811410369.4A CN109175179A (en) | 2018-11-23 | 2018-11-23 | A kind of high temperature alloy forging process for fuel pulling method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811410369.4A CN109175179A (en) | 2018-11-23 | 2018-11-23 | A kind of high temperature alloy forging process for fuel pulling method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111001744A (en) * | 2019-12-23 | 2020-04-14 | 安徽省瑞杰锻造有限责任公司 | Forging process and forging device for arch bridge pull rod |
| CN113486477A (en) * | 2021-08-20 | 2021-10-08 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for designing prefabricated blank of high-temperature-resistant alloy complex single-tenon blade forging |
| CN115950371A (en) * | 2023-02-27 | 2023-04-11 | 中国矿业大学 | One-point strain measurement method based on optical microscopy |
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| WO2007080750A1 (en) * | 2006-01-13 | 2007-07-19 | Osaka Titanium Technologies Co., Ltd. | Process for production of titanium material for sputtering |
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| JPS62284053A (en) * | 1986-06-03 | 1987-12-09 | Nippon Steel Corp | Method for forging titanium alloy material |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111001744A (en) * | 2019-12-23 | 2020-04-14 | 安徽省瑞杰锻造有限责任公司 | Forging process and forging device for arch bridge pull rod |
| CN113486477A (en) * | 2021-08-20 | 2021-10-08 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for designing prefabricated blank of high-temperature-resistant alloy complex single-tenon blade forging |
| CN113486477B (en) * | 2021-08-20 | 2023-06-09 | 中国航发沈阳黎明航空发动机有限责任公司 | Design method of high-temperature-resistant alloy complex single-tenon blade forging preform |
| CN115950371A (en) * | 2023-02-27 | 2023-04-11 | 中国矿业大学 | One-point strain measurement method based on optical microscopy |
| CN115950371B (en) * | 2023-02-27 | 2023-10-03 | 中国矿业大学 | Optical microscopy-based one-point strain measurement method |
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Application publication date: 20190111 |