CN106480386B - A kind of high temperature insostatic pressing (HIP) method for repairing directionally solidified superalloy, DS superalloy DZ125 creep impairments - Google Patents
A kind of high temperature insostatic pressing (HIP) method for repairing directionally solidified superalloy, DS superalloy DZ125 creep impairments Download PDFInfo
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- CN106480386B CN106480386B CN201611144070.XA CN201611144070A CN106480386B CN 106480386 B CN106480386 B CN 106480386B CN 201611144070 A CN201611144070 A CN 201611144070A CN 106480386 B CN106480386 B CN 106480386B
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- high temperature
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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
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
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Abstract
The invention discloses a kind of high temperature insostatic pressing (HIP) method for repairing directionally solidified superalloy, DS superalloy DZ125 creep impairments, belong to the tissue repair technical field of high temperature alloy.Described high temperature insostatic pressing (HIP) method includes sample carrying out hip treatment in high temperature insostatic pressing (HIP) stove, and handling process is：Pressure medium uses high-purity Ar gas, and sample is placed in crucible and is embedded in tiny Al2O3In particle, with 5~15 DEG C/min heating rate from room temperature to 1225 DEG C~1250 DEG C, while Ar atmospheric pressures rise to 20~40MPa, heat-insulation pressure keeping 30min~90min, then boost to 100MPa~150MPa and keep more than 120min；Room temperature is cooled to 1000 DEG C/h speed.After the present invention is handled by rational heat and other static pressuring processes, so that military service leaf tissue is repaired, internal recrystallization will not be produced while effectively repairing creep impairment and casting flaw, the microhardness organized after reparation significantly improves, and mechanical behavior under high temperature is restored.
Description
Technical field
The present invention relates to the tissue repair technical field of high temperature alloy, repairs directional solidification high temperature more particularly to one kind and closes
The high temperature insostatic pressing (HIP) method of golden DZ125 creep impairments.
Background technology
The high temperature alloy DZ125 of directional solidification is widely used in the blade of aero-engine hot end rotor, and it has preferable
Mechanical behavior under high temperature, but the Service Environment of rotor is very harsh, is subjected to different degrees of military service creep tissue damage, makes
Its performance degradation causes failure damage, and the principal mode of creep impairment is degenerated for microscopic structure and the forming core and length of creep hole
Greatly.It is domestic not have effective renovation technique in the prior art, it is therefore desirable to which that a kind of damage is gone out according to the properties study of DZ125 alloys
The renovation technique of injured tissue, to improve the service life of part, cost is reduced, so as to extend aero-engine service life.
DZ125 alloy high-temp creep impairments are mainly manifested in the forming core of microscopic structure degeneration and creep hole and grown up.It is right
Include two steps in the recovery technique of alloy structure：(1) high temperature insostatic pressing (HIP) repairs caused creep during DZ125 alloys are on active service
Casting flaw in hole and original structure；(2) restoring heat treatment system improves the microscopic structure degenerated, and reaches or approaches
Displaing micro tissue topography before military service.
The selection of heat and other static pressuring processes parameter and the degree of injury of alloy and types of alloys are closely related, especially for fixed
To for solidification high temperature alloy, the parameter selection of high temperature insostatic pressing (HIP) is abnormal important, and improperly temperature selection may be in healing hole
Nearby produce internal recrystallize.
The content of the invention
For above-mentioned problem of the prior art, the invention provides one kind to repair directionally solidified superalloy, DS superalloy DZ125 creeps
The high temperature insostatic pressing (HIP) method of damage.Purpose be by rational heat and other static pressuring processes handle after so that military service leaf tissue is repaiied
Multiple, performance gets a promotion, and recovers the good mechanical behavior under high temperature before being on active service.
The high temperature insostatic pressing (HIP) method of described reparation directionally solidified superalloy, DS superalloy DZ125 creep impairments provided by the invention, tool
Body is achieved by the steps of：
The first step, the DZ125 blades that creep impairment is produced after military service are sampled at appropriate position；
Second step, the sample taken is subjected to hip treatment in high temperature insostatic pressing (HIP) stove, handling process is：
Pressure medium uses high-purity Ar gas, and sample is placed in crucible and is embedded in tiny Al2O3In particle, with 5~15 DEG C/min
Heating rate from room temperature to 1225 DEG C~1250 DEG C, while Ar atmospheric pressures rise to 20~40MPa, heat-insulation pressure keeping 30min
~90min, then boost to 100MPa~150MPa and keep more than 120min.
Preferably, with 10 DEG C/min heating rate from room temperature to 1225 DEG C, while Ar atmospheric pressures rise to 30MPa,
Heat-insulation pressure keeping 60min, then boost to 100MPa and keep 120min.
Described Al2O310~15 microns of particle diameter average out to.
3rd step, room temperature is cooled to 1000 DEG C/h speed.
The advantage of the invention is that：
Compared with prior art, the present invention will not produce inside again while creep impairment and casting flaw is effectively repaired
Crystallization, the microhardness organized after reparation significantly improve, and mechanical behavior under high temperature is restored.
Brief description of the drawings
Figure 1A and Figure 1B is the microscopic structure picture of original DZ125 alloys；
Fig. 2A and Fig. 2 B are the microscopic structure picture of military service blade DZ125 alloys；
Fig. 3 A and Fig. 3 B are the microscopic structure picture after high temperature insostatic pressing (HIP) is repaired；
Fig. 4 is the contrast of the microhardness under different condition：Original represents the microhardness of original DZ125 alloys,
Damaged represents the microhardness of DZ125 alloys after blade is on active service, and HIP is the micro- hard of DZ125 alloys after hip treatment
Degree.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.Following examples will give more this method
Detailed description, so that person in the art is better understood from the advantage and feature of the present invention.
Embodiment 1：
The first step, the DZ125 blades that creep impairment is produced after military service are sampled at appropriate position；
As shown in Figure 1A and 1B, casting rarefaction defect, γ ＇ are contained in the microscopic structure of the original DZ125 alloys of sampling
Mutually in cubic.The DZ125 alloy microscopic structures of military service blade after military service as shown in Figure 2 A and 2 B, are dredged containing casting
Pine and Creep hole, cubic γ ＇ phases have been converted into the sheet of γ ＇ phases of thick aggregation.
Second step, the sample taken is subjected to hip treatment in high temperature insostatic pressing (HIP) stove, used equipment is Avure
The Quintus QIH-3 hot isostatic presses of company's production.Described hip treatment technological parameter is：
Pressure medium uses high-purity Ar gas, and sample is placed in crucible and is embedded in the Al of 10~15 microns of average diameter2O3Particle
In, with 10 DEG C/min heating rate from room temperature to 1225 DEG C, while Ar atmospheric pressures rise to 30MPa, heat-insulation pressure keeping
60min, then boost to 100MPa and keep 120min.
3rd step, room temperature is cooled to 1000 DEG C/h speed.
By the experiment microscopic structure after above-mentioned hip treatment as shown in figs.3 a and 3b, alloy microscopic structure structure
In, internal casting is loose and creep hole is effectively healed, and γ ＇ phases are recovered to original cubic, and do not produce
Inside recrystallization.Microhardness has a certain degree of lifting, as a result as shown in figure 4, by hip treatment of the invention
Afterwards, the microhardness HV of alloy has reached 448.7, hence it is evident that higher than the microhardness of virgin alloy and military service alloy.
Embodiment 2：
The first step, the DZ125 blades that creep impairment is produced after military service are sampled.
In order to illustrate the beneficial effect of the hip treatment technique of the present invention, the position with obvious creeping characteristic is chosen
As sample；
Containing casting rarefaction defect in the original microscopic structure of DZ125 alloys, γ ＇ phases are in cubic.After military service
The DZ125 alloy microscopic structures of military service blade add Creep hole defect, cubic γ ＇ phases have been converted into thick aggregation
Sheet of γ ＇ phases.
Second step, the sample taken is subjected to hip treatment in high temperature insostatic pressing (HIP) stove, used equipment is Avure
The Quintus QIH-3 hot isostatic presses of company's production.Described hip treatment technological parameter is：
Pressure medium uses high-purity Ar gas, and sample is placed in crucible and is embedded in the Al of 10~15 microns of average diameter2O3Particle
In, with 5 DEG C/min heating rate from room temperature to 1225 DEG C, while Ar atmospheric pressures rise to 20MPa, heat-insulation pressure keeping 90min,
100MPa is boosted to again keeps 120min.
3rd step, room temperature is cooled to 1000 DEG C/h speed.
Embodiment 3：
The first step, the DZ125 blades that creep impairment is produced after military service are sampled, choosing sample has obvious creep hole etc.
Creep defect.
Second step, the sample taken is subjected to hip treatment in high temperature insostatic pressing (HIP) stove, used equipment is Avure
The Quintus QIH-3 hot isostatic presses of company's production.Described hip treatment technological parameter is：
Pressure medium uses high-purity Ar gas, and sample is placed in crucible and is embedded in the Al of 10~15 microns of average diameter2O3Particle
In, with 15 DEG C/min heating rate from room temperature to 1250 DEG C, while Ar atmospheric pressures rise to 40MPa, heat-insulation pressure keeping
30min, then boost to 150MPa and keep 180min.
3rd step, room temperature is cooled to 1000 DEG C/h speed.
Microscopic structure contrast is carried out to the experiment after hip treatment in above-described embodiment 2 and embodiment 3, as a result shown
Show, after the hip treatment technique by the present invention, the creep hole defect on military service blade sample disappears, and does not tie again
Crystalline substance, and the microhardness HV of sample reaches more than 420, relative to original DZ125 alloys and the DZ125 alloys being on active service
All tool is significantly improved.
Claims (1)
- A kind of 1. high temperature insostatic pressing (HIP) method for repairing directionally solidified superalloy, DS superalloy DZ125 creep impairments, it is characterised in that：Described heat Isostatic pressed method comprises the following steps：The first step, the DZ125 blades that creep impairment is produced after military service are sampled；Second step, the sample taken is subjected to hip treatment in high temperature insostatic pressing (HIP) stove, handling process is：Pressure medium uses high-purity Ar gas, and sample is placed in crucible and is embedded in Al2O3In particle, described Al2O3Average diameter of particles For 10~15 microns；With 5~15 DEG C/min heating rate from room temperature to 1225 DEG C, while Ar atmospheric pressures rise to 30MPa, Heat-insulation pressure keeping 60min, then boost to 100MPa and keep 120min, repair the creep impairment after being on active service in DZ125 and do not produce interior Portion recrystallizes；3rd step, room temperature is cooled to the speed more than 1000 DEG C/h.
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| CN201611144070.XA CN106480386B (en) | 2016-12-13 | 2016-12-13 | A kind of high temperature insostatic pressing (HIP) method for repairing directionally solidified superalloy, DS superalloy DZ125 creep impairments |
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| CN201611144070.XA CN106480386B (en) | 2016-12-13 | 2016-12-13 | A kind of high temperature insostatic pressing (HIP) method for repairing directionally solidified superalloy, DS superalloy DZ125 creep impairments |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| IT201600116950A1 (en) * | 2016-11-18 | 2018-05-18 | Nuovo Pignone Tecnologie Srl | Method for repairing parts of turbomachines by hybrid isostatic hot pressing procedure |
| CN107488825B (en) * | 2017-08-30 | 2019-10-11 | 西安热工研究院有限公司 | A kind of precipitation strength type polycrystalline cast Ni-base alloy military service injury recovery method |
| CN110284087A (en) * | 2019-05-23 | 2019-09-27 | 中国人民解放军第五七一九工厂 | A kind of restoring heat treatment method for repairing K403 nickel base superalloy blade creep impairment |
| CN112180038A (en) * | 2020-09-18 | 2021-01-05 | 中国航发四川燃气涡轮研究院 | Method for detecting change of coating structure performance of aero-engine |
| CN114058987A (en) * | 2021-11-10 | 2022-02-18 | 中国航发北京航空材料研究院 | Repair treatment method for high-temperature creep degradation of nickel-based single crystal superalloy |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101850422A (en) * | 2010-04-30 | 2010-10-06 | 北京工业大学 | Ni-base alloy composite base band prepared by hot isostatic pressing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101850422A (en) * | 2010-04-30 | 2010-10-06 | 北京工业大学 | Ni-base alloy composite base band prepared by hot isostatic pressing method |
Non-Patent Citations (3)
| Title |
|---|
| Interaction of hot isostatic pressing temperature and hydrostatic pressure on the healing of creep cavities in a nickel-based superalloy;Yu Zhou et al;;《Materials and Design》;20130208;第49卷;说明书第2部分第1段，第27页第2段 * |
| 涡轮叶片蠕变损伤的恢复处理研究进展;周煜等;《材料热处理学报》;20121231;第33卷(第12期);全文 * |
| 热处理对热等静压Ｋ４１６９合金组织及高温持久性的影响;凌李石保等;《特种铸造及有色合金》;20161020;第36卷(第10期);全文 * |
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