CN111424159B - Aging treatment method of GH4780 alloy welding joint, GH4780 alloy weldment and aircraft engine - Google Patents
Aging treatment method of GH4780 alloy welding joint, GH4780 alloy weldment and aircraft engine Download PDFInfo
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- CN111424159B CN111424159B CN202010410581.1A CN202010410581A CN111424159B CN 111424159 B CN111424159 B CN 111424159B CN 202010410581 A CN202010410581 A CN 202010410581A CN 111424159 B CN111424159 B CN 111424159B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/78—Combined heat-treatments not provided for above
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
- C21D9/505—Cooling thereof
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/10—Metals, alloys or intermetallic compounds
- F05D2300/17—Alloys
- F05D2300/175—Superalloys
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention provides an aging treatment method of a GH4780 alloy welding joint, a GH4780 alloy weldment and an aeroengine, and relates to the field of alloy manufacturing, wherein the aging treatment method of the GH4780 alloy welding joint comprises the following steps: the GH4780 alloy welding joint is firstly insulated for 6 to 10 hours at the temperature of 790 to 850 ℃, then insulated for 6 to 10 hours at the temperature of 730 to 760 ℃ and finally insulated for 6 to 10 hours at the temperature of 610 to 660 ℃. The method can ensure that elements in the welding seam of the GH4780 alloy welding joint are distributed more uniformly, reasonably regulate and control the size and distribution of precipitated phases, effectively reduce the residual stress in the welding joint and improve the mechanical property of the welding joint.
Description
Technical Field
The invention relates to the technical field of alloy manufacturing, in particular to an aging treatment method of a GH4780 alloy welding joint, a GH4780 alloy weldment and an aero-engine.
Background
The GH4780 alloy has good high-temperature mechanical property and high-temperature oxidation resistance, and can be used for hot end parts of aeroengine casings, rectifiers, nozzles and the like. GH4780 alloy various hot end parts need to be connected and combined through a precise welding technology, and the stability and the mechanical property of an alloy welding joint structure can influence the service life of an aeroengine. Compared with GH4780 alloy base metal, the microstructure and the precipitated phase of the weld metal after remelting and combining can change, the base metal nearby can form a heat affected zone gradient structure, the residual stress distribution of the welded joint is not uniform, the factors can increase the service risk of the welded joint in a harsh environment, the effect of adverse factors on the welded joint needs to be reduced through postweld aging treatment, and the mechanical property of the welded joint is further improved.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to provide an aging treatment method for a GH4780 alloy welding joint, which can enable elements in a welding seam of the GH4780 alloy welding joint to be distributed more uniformly, reasonably regulate and control the size and distribution of precipitated phases, effectively reduce residual stress in the welding joint and improve the mechanical property of the welding joint.
The invention provides an aging treatment method of a GH4780 alloy welding joint, which comprises the following steps:
the GH4780 alloy welding joint is firstly insulated for 6 to 10 hours at the temperature of 790 to 850 ℃, then insulated for 6 to 10 hours at the temperature of 730 to 760 ℃ and finally insulated for 6 to 10 hours at the temperature of 610 to 660 ℃.
Further, after the temperature is kept at 790-850 ℃ for 6-10h, the temperature is reduced to 730-760 ℃ at the cooling rate of 60-80 ℃/h and kept for 6-10 h;
preferably, after the temperature is maintained for 6-10h at 790-850 ℃, the temperature is reduced to 730-760 ℃ at the cooling rate of 70 ℃/h and the temperature is maintained for 6-10 h.
Further, after the temperature is kept at 730-760 ℃ for 6-10h, the temperature is reduced to 610-660 ℃ at the cooling rate of 60-80 ℃/h and kept for 6-10 h;
preferably, after the temperature is kept at 730-760 ℃ for 6-10h, the temperature is reduced to 610-660 ℃ at the cooling rate of 70 ℃/h and the temperature is kept for 6-10 h.
Further, the GH4780 alloy welded joint is cooled, preferably air-cooled, after being kept at 610-660 ℃ for 6-10 h.
Further, comprising:
the GH4780 alloy welding joint is firstly insulated for 8h at the temperature of 790-850 ℃, then insulated for 8h at the temperature of 730-760 ℃ and finally insulated for 8h at the temperature of 610-660 ℃;
preferably, the GH4780 alloy solder joint is first incubated at 820 ℃ for 8h, then at 730 ℃ for 8h, and finally at 610 ℃ for 8 h.
Further, comprising:
the GH4780 alloy welded joint is firstly insulated for 8h at the temperature of 790-850 ℃, then cooled to 730-760 ℃ at the cooling rate of 70 ℃/h and insulated for 8h, and finally cooled to 610-660 ℃ at the cooling rate of 70 ℃/h and insulated for 8 h.
And further, keeping the temperature of 610-660 ℃ for 8h, and then cooling the GH4780 alloy welding joint in air.
A welding joint of the GH4780 alloy weldment is treated by the aging treatment method of the GH4780 alloy welding joint.
Further, the GH4780 alloy weldment includes at least one of an engine case, a flow straightener, and a nozzle.
An aircraft engine comprising the GH4780 alloy weldment previously described.
Compared with the prior art, the invention can at least obtain the following beneficial effects:
the GH4780 alloy welding joint is treated by the aging treatment method of the GH4780 alloy welding joint, so that elements in a welding joint can be distributed more uniformly, the size and distribution of precipitated phases can be reasonably regulated and controlled, and the residual stress in the welding joint is effectively reduced; in addition, the mechanical property of the welding joint is effectively improved on the premise of not influencing the strength of the base metal.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In one aspect of the invention, the invention provides an aging treatment method for a GH4780 alloy welded joint, which comprises the following steps:
the GH4780 alloy welded joint is first insulated for 6-10h (for example, 6h, 7h, 8h, 9h, 10h, etc.) at 790-850 ℃ (for example, 790 ℃, 800 ℃, 810 ℃, 820 ℃, 830 ℃, 840 ℃, 850 ℃ or the like), then insulated for 6-10h (for example, 6h, 7h, 8h, 9h, 10h, etc.) at 730-760 ℃ (for example, 730 ℃, 740 ℃, 750 ℃, 760 ℃ or the like), and finally insulated for 6-10h (for example, 6h, 7h, 8h, 9h, 10h, etc.) at 610-660 ℃ (for example, 610 ℃, 620 ℃, 630 ℃, 640 ℃, 650 ℃, 660 ℃, etc.).
The GH4780 alloy welding joint is treated by the aging treatment method of the GH4780 alloy welding joint, so that elements in a welding joint can be distributed more uniformly, the size and distribution of precipitated phases can be reasonably regulated and controlled, and the residual stress in the welding joint is effectively reduced; in addition, the mechanical property of the welding joint is effectively improved on the premise of not influencing the strength of the base metal.
In some embodiments of the present invention, after the temperature is maintained at 790-850 ℃ for 6-10h, the temperature is reduced to 730-760 ℃ at a temperature reduction rate of 60-80 ℃/h (for example, 60 ℃/h, 70 ℃/h, or 80 ℃/h, etc.) for 6-10 h. Compared with the cooling rate, when the cooling rate is lower than 60 ℃/h, the metal precipitated phase of the welding seam is coarsened, cracks are easy to be induced to be initiated, and the solid solution strengthening effect is reduced; when the cooling rate is higher than 80 ℃/h, the amount of the precipitated phases of the weld metal is less, the precipitation strengthening effect is weaker, and the strength of a welding joint is lower.
In some preferred embodiments of the invention, after the temperature is maintained at 790-850 ℃ for 6-10h, the temperature is reduced to 730-760 ℃ at a temperature reduction rate of 70 ℃/h and maintained for 6-10 h.
In some embodiments of the present invention, after the temperature is maintained at 730-760 ℃ for 6-10h, the temperature is reduced to 610-660 ℃ at a temperature reduction rate of 60-80 ℃/h (for example, 60 ℃/h, 70 ℃/h, or 80 ℃/h, etc.) for 6-10 h. Compared with the cooling rate, when the cooling rate is lower than 60 ℃/h, the size of the metal precipitated phase of the welding seam is increased; when the cooling rate is higher than 80 ℃/h, the residual stress of the welding joint is larger.
In some preferred embodiments of the invention, after the temperature is kept at 730-760 ℃ for 6-10h, the temperature is reduced to 610-660 ℃ at the temperature reduction rate of 70 ℃/h and kept for 6-10 h.
In some embodiments of the invention, the GH4780 alloy welded joint is cooled, preferably air cooled, after being held at 610-660 ℃ for 6-10 hours.
In some embodiments of the invention, a method for aging a GH4780 alloy weld joint comprises:
the GH4780 alloy welding joint is firstly insulated for 8h at the temperature of 790-850 ℃, then insulated for 8h at the temperature of 730-760 ℃ and finally insulated for 8h at the temperature of 610-660 ℃;
in some embodiments of the invention, the GH4780 alloy weld joint is first incubated at 820 ℃ for 8 hours, then at 730 ℃ for 8 hours, and finally at 610 ℃ for 8 hours.
In some embodiments of the invention, a method for aging a GH4780 alloy weld joint comprises:
the GH4780 alloy welded joint is firstly insulated for 8h at the temperature of 790-850 ℃, then cooled to 730-760 ℃ at the cooling rate of 70 ℃/h and insulated for 8h, and finally cooled to 610-660 ℃ at the cooling rate of 70 ℃/h and insulated for 8 h.
In some embodiments of the invention, the GH4780 alloy welded joint is air cooled after being maintained at 610-660 ℃ for 8 h.
In another aspect of the invention, the invention provides a GH4780 alloy weldment with a weld joint treated by the aging treatment method of the GH4780 alloy weld joint described above.
In some embodiments of the invention, the GH4780 alloy weldment includes at least one of an engine case, a flow straightener, and a nozzle.
In another aspect of the invention, the invention provides an aircraft engine comprising the GH4780 alloy weldment previously described.
It should be noted that the aircraft engine may include other conventional components such as a turbine disk, a baffle plate, a sealing ring and the like besides the GH4780 alloy weldment, and redundant description is omitted here.
Some embodiments of the present invention will be described in detail below with reference to specific embodiments. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Examples
Example 1
The aging treatment method of the GH4780 alloy welding joint comprises the following steps:
and (3) preserving the heat of the GH4780 alloy welding joint for 8h at 850 ℃, then reducing the temperature to 760 ℃ at a cooling speed of 70 ℃/h, preserving the heat for 8h, then reducing the temperature to 660 ℃ at a cooling speed of 70 ℃/h, preserving the heat for 8h, and then cooling in air.
Mechanical properties of the GH4780 alloy joint obtained after the heat treatment of the GH4780 alloy welded joint by the aging treatment method of the present embodiment when the joint is stretched at room temperature and at 760 ℃ are shown in table 1 below:
TABLE 1
Example 2
The aging treatment method of the GH4780 alloy welding joint comprises the following steps:
and (3) keeping the temperature of the GH4780 alloy welding joint at 850 ℃ for 8h, then reducing the cooling speed at 70 ℃/h to 730 ℃ and keeping the temperature for 8h, then reducing the cooling speed at 70 ℃/h to 630 ℃ and keeping the temperature for 8h, and then cooling in air.
Mechanical properties of the GH4780 alloy joint obtained after the heat treatment of the GH4780 alloy welded joint by the aging treatment method of the present embodiment when the joint is stretched at room temperature and at 760 ℃ are shown in table 2 below:
TABLE 2
Example 3
The aging treatment method of the GH4780 alloy welding joint comprises the following steps:
and (3) preserving the heat of the GH4780 alloy welding joint for 8h at 820 ℃, then reducing the cooling speed at 70 ℃/h to 730 ℃ and preserving the heat for 8h, then reducing the cooling speed at 70 ℃/h to 610 ℃ and preserving the heat for 8h, and then cooling in the air.
Mechanical properties of the GH4780 alloy joint obtained after the heat treatment of the GH4780 alloy welded joint by the aging treatment method of the present embodiment when the joint is stretched at room temperature and at 760 ℃ are shown in table 3 below:
TABLE 3
Example 4
The aging treatment method of the GH4780 alloy welding joint comprises the following steps:
and (3) preserving the temperature of the GH4780 alloy welding joint for 8h at 790 ℃, then reducing the temperature to 740 ℃ at a cooling rate of 70 ℃/h, preserving the temperature for 8h, then reducing the temperature to 630 ℃ at a cooling rate of 70 ℃/h, preserving the temperature for 8h, and then cooling in air.
Mechanical properties of the GH4780 alloy joint obtained after the heat treatment of the GH4780 alloy welded joint by the aging treatment method of the present embodiment when the joint is stretched at room temperature and at 760 ℃ are shown in table 4 below:
TABLE 4
Comparative example 1
The aging treatment method of the GH4780 alloy welding joint comprises the following steps:
and (3) preserving the heat of the GH4780 alloy welding joint for 8h at 900 ℃, then reducing the temperature to 760 ℃ at a cooling rate of 70 ℃/h, preserving the heat for 8h, then reducing the temperature to 660 ℃ at a cooling rate of 70 ℃/h, preserving the heat for 8h, and then cooling in air.
Mechanical properties of the GH4780 alloy joint obtained after the heat treatment of the GH4780 alloy welded joint by the aging treatment method of the present comparative example at room temperature and at 760 ℃ under tension are respectively shown in table 5 below:
TABLE 5
Comparative example 2
The aging treatment method of the GH4780 alloy welding joint comprises the following steps:
and (3) preserving the heat of the GH4780 alloy welding joint for 8h at 700 ℃, then reducing the temperature to 760 ℃ at a cooling rate of 70 ℃/h, preserving the heat for 8h, then reducing the temperature to 660 ℃ at a cooling rate of 70 ℃/h, preserving the heat for 8h, and then cooling in air.
Mechanical properties of the GH4780 alloy joint obtained after the heat treatment of the GH4780 alloy welded joint by the aging treatment method of the present comparative example at room temperature and at 760 ℃ under tension are respectively shown in table 6 below:
TABLE 6
Comparative example 3
The aging treatment method of the GH4780 alloy welding joint comprises the following steps:
and (3) preserving the heat of the GH4780 alloy welding joint for 8h at 850 ℃, then reducing the temperature to 800 ℃ at a cooling speed of 70 ℃/h, preserving the heat for 8h, then reducing the temperature to 660 ℃ at a cooling speed of 70 ℃/h, preserving the heat for 8h, and then cooling in air.
Mechanical properties of the GH4780 alloy joint obtained after the heat treatment of the GH4780 alloy welded joint by the aging treatment method of the present comparative example at room temperature and at 760 ℃ under tension are respectively shown in the following table 7:
TABLE 7
Comparative example 4
The aging treatment method of the GH4780 alloy welding joint comprises the following steps:
and (3) preserving the heat of the GH4780 alloy welding joint for 8h at 850 ℃, then reducing the temperature to 700 ℃ at a cooling speed of 70 ℃/h, preserving the heat for 8h, then reducing the temperature to 660 ℃ at a cooling speed of 70 ℃/h, preserving the heat for 8h, and then cooling in air.
Mechanical properties of the GH4780 alloy joint obtained after the heat treatment of the GH4780 alloy welded joint by the aging treatment method of the present comparative example at room temperature and at 760 ℃ under tension are respectively shown in table 8 below:
TABLE 8
Comparative example 5
The aging treatment method of the GH4780 alloy welding joint comprises the following steps:
and (3) preserving the heat of the GH4780 alloy welding joint for 8h at 850 ℃, then reducing the temperature to 760 ℃ at a cooling speed of 70 ℃/h, preserving the heat for 8h, then reducing the temperature to 700 ℃ at a cooling speed of 70 ℃/h, preserving the heat for 8h, and then cooling in air.
Mechanical properties of the GH4780 alloy joint obtained after the heat treatment of the GH4780 alloy welded joint by the aging treatment method of the present comparative example at room temperature and at 760 ℃ under tension are respectively shown in the following table 9:
TABLE 9
Comparative example 6
The aging treatment method of the GH4780 alloy welding joint comprises the following steps:
and (3) preserving the heat of the GH4780 alloy welding joint for 8h at 850 ℃, then reducing the temperature to 760 ℃ at a cooling speed of 70 ℃/h, preserving the heat for 8h, then reducing the temperature to 550 ℃ at a cooling speed of 70 ℃/h, preserving the heat for 8h, and then cooling in air.
Mechanical properties of the GH4780 alloy joint obtained after the heat treatment of the GH4780 alloy welded joint by the aging treatment method of the present comparative example when the joint was stretched at room temperature and at 760 ℃ are shown in table 10 below, respectively:
watch 10
Comparative example 7
The GH4780 alloy welded joint is not subjected to aging treatment.
The mechanical properties of the GH4780 alloy welded joint without aging treatment when stretched at room temperature and at 760 ℃ are shown in Table 11 below:
TABLE 11
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (11)
1. An aging treatment method for a GH4780 alloy welded joint is characterized by comprising the following steps:
the GH4780 alloy welding joint is firstly insulated for 6-10h at 790-830 ℃, cooled to 730-740 ℃ at the cooling rate of 60-80 ℃/h and insulated for 6-10h, then cooled to 610 ℃ at the cooling rate of 60-80 ℃/h and insulated for 6-10h, and finally cooled.
2. The aging treatment method of the GH4780 alloy welded joint of claim 1, characterized in that, after the temperature is maintained at 790-830 ℃ for 6-10h, the temperature is reduced to 730-740 ℃ at a temperature reduction rate of 70 ℃/h and the temperature is maintained for 6-10 h.
3. The aging treatment method of the GH4780 alloy welded joint of claim 1, wherein the temperature is reduced to 610 ℃ at a temperature reduction rate of 70 ℃/h for 6-10h after the temperature is maintained at 730 ℃ -740 ℃ for 6-10 h.
4. The aging treatment method for the GH4780 alloy welded joint according to claim 1, wherein the cooling treatment is air cooling.
5. The aging method of the GH4780 alloy weld joint of claim 1, comprising:
the GH4780 alloy welded joint is firstly insulated for 8h at 790-830 ℃, then insulated for 8h at 730-740 ℃ and finally insulated for 8h at 610 ℃.
6. The aging treatment method of the GH4780 alloy welded joint of claim 5, characterized in that the GH4780 alloy welded joint is first incubated at 820 ℃ for 8h, then at 730 ℃ for 8h and finally at 610 ℃ for 8 h.
7. The aging method of the GH4780 alloy weld joint of claim 1, comprising:
the GH4780 alloy welding joint is firstly insulated for 8h at the temperature of 790-830 ℃, then cooled to 730-740 ℃ at the cooling rate of 70 ℃/h and insulated for 8h, and finally cooled to 610 ℃ at the cooling rate of 70 ℃/h and insulated for 8 h.
8. The aging treatment method of the GH4780 alloy welded joint of claim 7, wherein the GH4780 alloy welded joint is air cooled after the temperature preservation at 610 ℃ for 8 h.
9. A GH4780 alloy weldment characterized in that the weld joint of the GH4780 alloy weldment is treated by the aging process of the GH4780 alloy weld joint of any of claims 1-8.
10. The GH4780 alloy weldment of claim 9 comprising at least one of an engine case, a flow straightener, and a nozzle.
11. An aircraft engine comprising a GH4780 alloy weldment according to claim 9 or 10.
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| CN111101022A (en) * | 2018-10-29 | 2020-05-05 | 利宝地工程有限公司 | High gamma prime nickel-based superalloy, use thereof and method of manufacturing a turbine engine component |
| CN109338260A (en) * | 2018-11-29 | 2019-02-15 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of heat treatment process for restoring GH4169 alloy forged piece weld assembly Notch Stress-Rupture |
| CN110358991A (en) * | 2019-08-14 | 2019-10-22 | 河北工业大学 | A kind of processing method of enhancing forging state Ni-Cr-Co based alloy thermal fatigue property |
| CN110484841A (en) * | 2019-09-29 | 2019-11-22 | 北京钢研高纳科技股份有限公司 | A kind of heat treatment method of GH4780 alloy forged piece |
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