CN108660380A - Low energy crystal boundary ratio method in iron nickel base alloy is improved by single step thermomechanical treatment - Google Patents
Low energy crystal boundary ratio method in iron nickel base alloy is improved by single step thermomechanical treatment Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
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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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
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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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
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Abstract
The present invention relates to iron nickel base alloy fields, the method for specifically improving low energy crystal boundary ratio in iron nickel base alloy by single step thermomechanical treatment.Using single step deformation heat treatment method, low energy crystal boundary ratio is improved, specially：The process route of higher temperature solid solution → cold-rolling deformation → heat preservation → water cooling → ageing treatment, this method have the advantages that it is simple for process, without cold-rolling deformation repeatedly and be easily achieved.The iron nickel base alloy that the present invention is handled, low energy crystal boundary ratio are not less than 60~85%, and the wherein ratio of 3 crystal boundary of ∑ is not less than 50%.The iron nickel base alloy that the present invention is handled, the connectivity that can be formed stronger low energy crystal boundary network, interrupt wide-angle random grain boundary, the high temperature creep-resisting fracture and hydrogen resistance for being expected to obviously improve iron nickel base alloy cause intergranular crack ability, are with a wide range of applications.
Description
Technical field
The present invention relates to iron nickel base alloy fields, are specifically improved in iron nickel base alloy by single step thermomechanical treatment
The method of low energy (low coincidence site lattice ∑≤29) crystal boundary ratio.
Background technology
Crystal boundary is that structure is identical and be orientated the interface between different crystal grain, is a kind of typical planar defect, influence metal with
Many performances in alloy.The study found that many failure behaviours of alloy, such as：Intercrystalline corrosion, stress corrosion, high-temerature creep
It is related with crystal boundary with stress rupture, fatigue failure and hydrogen induced cracking (HIC) behavior etc..For a long time, how by regulate and control crystal boundary come
The performance optimization for carrying out alloy, is always research hotspot both domestic and external.
Watanabe is put forward for the first time the thought of Grain boundary design and control within 1984, i.e., by improving low ∑ CSL (CSL：
Coincidence Site Lattice, i.e. coincidence site lattice；It is generally believed that the crystal boundary of ∑≤29 is low ∑ CSL crystal boundaries, and
∑>29 crystal boundary is wide-angle random grain boundary) method of crystal boundary ratio, regulation and control Grain Boundary Character distribution, so as to improve material with it is brilliant
The related multiple performance in boundary.The study found that the low ∑ CSL Grain-Boundary Phases of ∑≤29 have ordered structure compared with wide-angle random grain boundary
And crystal boundary energy is lower.Such as：The crystal boundary energy of wide-angle random grain boundary is 1.2J/m2, and 3 crystal boundary of coherence ∑, non-3 crystal boundary of coherence ∑
Crystal boundary energy is only 0.01J/m respectively2With 0.1~0.6J/m2；Though the crystal boundary energy of other kinds of low ∑ crystal boundary is higher than 3 crystal boundary of ∑,
But still it is much smaller than wide-angle random grain boundary, therefore low ∑ CSL crystal boundaries are often also known as low energy crystal boundary, it is brilliant to obtain a high proportion of low energy
Boundary can reduce the negative phenomenas such as grain boundary fracture and the intercrystalline corrosion of material, can also improve the ductility of material.
The Ni-based austenite resistant to hydrogen alloy (hereinafter referred to as iron nickel base alloy) of precipitation strength iron is the base in single phase austenite alloy
On plinth, addition alloying element grows up.Total compared to single phase austenite, iron nickel base alloy has higher-strength, but anti-
Hydrogen damage ability but decreased significantly.By taking iron nickel base alloy J75 as an example, room-temperature yield strength (σ0.2) up to 700MPa or more,
But hydrogen causes elongation percentage damage to subtract to reach 20% (hydrogen causes elongation percentage damage to subtract δL=(δ0-δH)/δ0, δ0：Room temperature elongation percentage, δH：Saturation is flushed with hydrogen
Room temperature elongation percentage afterwards) more than.Research is found：1) hydrogen causes intergranular crack to be usually happened on wide-angle random grain boundary, this is to cause
The major reason that such alloy resistant to hydrogen lesion capability declines；2) hydrogen cause seldom occurs for low energy grain boundaries along grain boundary separation.Obviously, lead to
Specific crystal boundary regulation and control method is crossed, 3 crystal boundary of a high proportion of low energy crystal boundary, particularly a high proportion of ∑ is introduced in the alloy, is formed
Unique low energy crystal boundary network structure interrupts the connectivity of wide-angle random grain boundary, improves alloy and hydrogen induced cracking is germinated and expanded
Resistance is opened up, is expected to improve the resistant to hydrogen lesion capability of such alloy.
Invention content
The purpose of the present invention is to provide one kind improving low energy crystal boundary ratio in iron nickel base alloy by single step thermomechanical treatment
Example method using simple single step deformation heat treatment method, significantly improves low energy crystal boundary ratio in iron nickel base alloy.
The technical scheme is that：
One kind improving low energy crystal boundary ratio method in iron nickel base alloy by single step thermomechanical treatment, using single step deformation heat
Treatment process, it is 60~85% to make the low coincidence site lattice crystal boundary ratio of ∑≤29 in alloy, and wherein the ratio of 3 crystal boundary of ∑ is not
Less than 50%, include the following steps：
(1) iron nickel base alloy plank is subjected to solution treatment, processing method is that 0.5~2h is kept the temperature at 970~990 DEG C；
(2) the iron nickel base alloy plank of isothermal holding in step (1) is subjected to Water Quenching；
(3) by the iron nickel base alloy plank after Water Quenching in step (2), cold-rolling deformation is carried out, deflection is 4~
10%；
(4) step (3) cold-rolling deformation treated iron nickel base alloy plank keeps the temperature to 20 at 900~1050 DEG C~
120min, subsequent water cooling to room temperature；
(5) the iron nickel base alloy plank after step (4) water-cooled process keeps the temperature to 14 at 710~730 DEG C~for 24 hours, then take
Go out to be air-cooled to room temperature.
Described improves low energy crystal boundary ratio method in iron nickel base alloy, iron nickel base alloy plate by single step thermomechanical treatment
The thickness range of material is 2~4mm.
Described improves low energy crystal boundary ratio method in iron nickel base alloy by single step thermomechanical treatment, iron nickel base alloy
The trade mark is J75.
Described improves low energy crystal boundary ratio method in iron nickel base alloy by single step thermomechanical treatment, introduces in the alloy
A high proportion of low energy crystal boundary forms more low energy crystal boundary network, interrupts the connectivity of random high-angle boundary.
Described improves low energy crystal boundary ratio method in iron nickel base alloy, extension test reference by single step thermomechanical treatment
GB/T 228.1《Metal material stretching test part 1 room temperature test method》It carries out, alloy mechanical property meets GJB 5723-
2006《Resistant to hydrogen steel plate specification》Requirement.
The present invention design philosophy be：
The present invention is to improve low energy crystal boundary ratio in iron nickel base alloy by single step deformation heat treatment method, will be in alloy
3 crystal boundary ratio of ∑ is promoted to 50% or more, and low energy crystal boundary ratio less than 30~45% by being promoted to not less than 60~85%.Together
When, the connectivity that stronger low energy crystal boundary network can be formed, interrupt wide-angle random grain boundary, specially：Higher temperature solid solution →
The process route of cold-rolling deformation → heat preservation → water cooling → ageing treatment.Solution treatment：970~990 DEG C of 0.5~2h of heat preservation, a side
Face can eliminate processing hardening, make the precipitated phases back dissolving such as carbide；On the other hand promote recrystallization, and keep suitable crystal grain
Size.Using 4~10% cold-rolling deformations, deformation energy is stored in intra-die by cold-rolling deformation, is later stage crystal boundary migration, improves
Low energy crystal boundary ratio is prepared.Heat preservation：20~120min is kept the temperature at 900~1050 DEG C, during this, can not only form high ratio
The low energy crystal boundary of example；And in insulating process, reciprocal decomposition can occur for different type crystal boundary, interrupt wide-angle random grain boundary
Connectivity.Ageing treatment：At 710~730 DEG C heat preservation 14~for 24 hours, promote alloy that precipitation phase is precipitated in ag(e)ing process, protect
Demonstrate,prove the intensity of J75 alloys.
Advantages of the present invention and advantageous effect are：
1, the present invention only passes through simple single step deformation heat treatment method under the premise of not changing alloying component, you can
Significantly improve the low energy crystal boundary ratio in alloy, have it is simple for process, without cold-rolling deformation repeatedly, it is easy to accomplish the advantages of.
2, the iron nickel base alloy handled using the method for the present invention, the low energy crystal boundary ratio in alloy are not less than 60~85%,
And 3 crystal boundary ratio of ∑ therein is not less than 50%.
3, the iron nickel base alloy handled using the method for the present invention interrupts wide-angle by introducing a high proportion of low energy crystal boundary
Random grain boundary connectivity forms unique low energy crystal boundary network structure.
4, the iron nickel base alloy handled using the method for the present invention is had preferable while introducing high proportion low energy crystal boundary
Room-temperature mechanical property, yield strength is in 700MPa or more, and for tensile strength in 1050MPa or more, elongation percentage is full 30% or more
Sufficient GJB 5723-2006《Resistant to hydrogen steel plate specification》Requirement.
Description of the drawings
Fig. 1 is the Grain Boundary Character distribution results after J75 alloys conventional treatment and single step thermomechanical treatment；Wherein, (a) is conventional
Handle (solid solution+ageing treatment) alloy, low energy crystal boundary ratio 40%；(b) single step thermomechanical treatment alloy, low energy crystal boundary ratio
82.2%；(c) the wide-angle random grain boundary schematic network structure after conventional treatment；(d) it is formed after single step thermomechanical treatment
Low energy crystal boundary schematic network structure.
Specific implementation mode
In specific implementation process, the present invention provides a kind of by simple single step thermomechanical treatment raising iron nickel base alloy
The method of middle low energy crystal boundary ratio.Using single step thermomechanical treatment process, 3 crystal boundary ratio of ∑ is promoted to be promoted to 50% (length ratio
Example) more than, low energy crystal boundary ratio is promoted to not less than 60~85%, and wide-angle random grain boundary is interrupted using high proportion low energy crystal boundary
Connectivity, form unique low energy crystal boundary network, technological process is：Higher temperature solid solution → cold-rolling deformation → heat preservation → water
Cold → ageing treatment.Wherein：The thickness range of iron nickel base alloy plank is 2~4mm, and the iron nickel base alloy trade mark is J75, chemistry
Ingredient is as follows：Percentage meter by weight, Ni：29.0~32.0, Cr：14.0~16.0, Mo：1.30~1.50, titanium：1.60~
2.30 aluminium：0.2~0.5, silicon：0.1~0.3, boron：0.0008~0.0025, iron：Surplus.The iron nickel handled using the above method
Based alloy, the connectivity that can be formed stronger low energy crystal boundary network, interrupt wide-angle random grain boundary, it is Ni-based to be expected to obviously improve iron
The high temperature creep-resisting fracture of alloy and hydrogen resistance cause intergranular crack ability, are with a wide range of applications.
The present invention is described in further detail below by embodiment and attached drawing.
Embodiment 1:
In the present embodiment, single step thermomechanical treatment is carried out to the J75 sheet alloys that thickness is 4.0mm, 3 crystal boundary ratio of ∑ reaches
To 66.7%, low energy crystal boundary ratio reaches 82.2%.Specific implementation process is：
1, J75 sheet alloys are hot rolled plate, and the chemical composition of hot rolled plate meets GJB 5723-2006《Resistant to hydrogen steel plate
Specification》Requirement.J75 sheet alloys are placed in heat-treatment furnace, 970~990 DEG C (the present embodiment be 980 DEG C) heat preservation 0.5~
2h (the present embodiment 2h) takes out Water Quenching；
2, using 4-roller cold rolling mill, the J75 sheet alloys after solution treatment in step 1 are subjected to 4~10% (the present embodiment
For cold-rolling deformation 5%).
3, the J75 sheet alloys after step 2 cold-rolling deformation are subjected to isothermal holding, method is in 900~1050 DEG C of (these
Embodiment is 980 DEG C) 20~120min of heat preservation (the present embodiment 60min), subsequent water cooling to room temperature.
4, by the J75 sheet alloys after step 3 water cooling in 710~730 DEG C (the present embodiment be 720 DEG C) heat preservation 14~for 24 hours
(the present embodiment 16h) is air-cooled to room temperature.
5, sample is cut from step 4 treated sheet alloy, carries out EBSD analyses.Table 1 is that different type low energy is brilliant
The ratio on boundary.After single step thermomechanical treatment, low energy crystal boundary ratio is promoted to that (this example is not less than 60~85% in alloy
82.2%), the ratio of wherein 3 crystal boundary of ∑ is promoted to 50% or more (this example is 66.7%).
6, sample is cut from step 4 treated sheet alloy, carries out EBSD analyses.Grain Boundary Character distribution results are as schemed
Shown in 1, wherein grey represents low energy crystal boundary (∑≤29), and black represents wide-angle random grain boundary.Compared to conventional treatment (Fig. 1
(a)), the low energy crystal boundary ratio after single step thermomechanical treatment in alloy forms stronger low energy crystal boundary network, and wide-angle is brilliant at random
The connectivity on boundary is interrupted, and sees Fig. 1 (b).Fig. 1 (c), the crystal boundary network characterization that 1 (d) is conventional treatment and single step thermomechanical treatment
Distribution schematic diagram, display are interrupted by introducing a large amount of low energy crystal boundary, the connectivity of wide-angle random grain boundary.
7, the J75 alloys that will be handled by step 4, with reference to GB/T 228.1《Metal material stretching test part 1 room temperature is tried
Proved recipe method》Mechanics Performance Testing is carried out, as a result shows that its yield strength be more than 705MPa, tensile strength is more than 1055MPa, extension
Rate is more than 35%, meets GJB 5723-2006《Resistant to hydrogen steel plate specification》Requirement, concrete outcome is as shown in table 2.
1 different type low energy crystal boundary ratio of table
2 single step thermomechanical treatment J75 alloy mechanical properties of table
The present embodiment plate thickness is the J75 sheet alloys of 4.0mm, and through single step thermomechanical treatment, (5%+980 DEG C of cold-rolling deformation is protected
Warm 60min) occur a large amount of low energy crystal boundaries in alloy afterwards, ratio is up to 82.2%, and the wherein ratio of 3 crystal boundary of ∑ is 66.7%,
Stronger low energy crystal boundary network is formed, the connectivity of wide-angle random grain boundary is interrupted, while there is preferable room-temperature mechanical property,
Meet GJB 5723-2006《Resistant to hydrogen steel plate specification》Requirement.
Embodiment 2：
Difference from Example 1 is, the thickness of J75 sheet alloys used is 3.0mm, using 7% cold-rolling deformation,
And 1000 DEG C, the soaking time of 30min, the 3 crystal boundary ratio of ∑ in alloy reach 63.3%, low energy crystal boundary ratio is
75.6%.
Using the alloy hot rolled materials of J75 of 3.0mm thickness identical with 1 chemical composition of embodiment, heat engine processing is carried out.
980 DEG C of heat preservation 1h, subsequent Water Quenching；After carrying out 7% cold-rolling deformation, 1000 DEG C, the isothermal holding of 30min are carried out, then
Water cooling is to room temperature.Sample after single step thermomechanical treatment keeps the temperature 16h at 720 DEG C, and taking-up is air-cooled to room temperature.It is carried out using EBSD brilliant
As a result boundary's structural analysis shows that 3 crystal boundary ratio of ∑ reaches 63.3% in alloy, low energy crystal boundary ratio reaches 75.6%, wide-angle
The connectivity of random grain boundary is interrupted, and different type low energy crystal boundary ratio is shown in Table 3.J75 Jing Guo single step thermomechanical treatment is closed
Golden plate material, with reference to GB/T 228.1《Metal material stretching test part 1 room temperature test method》Carry out Mechanics Performance Testing, knot
Fruit shows that its yield strength be more than 700MPa, tensile strength be more than 1055MPa, elongation percentage is more than 34.5%, meets GJB 5723-
2006《Resistant to hydrogen steel plate specification》Requirement, the results are shown in Table 4.
3 different type low energy crystal boundary ratio of table
4. single step thermomechanical treatment J75 alloy mechanical properties of table
The present embodiment plate thickness is the J75 sheet alloys of 3.0mm, through single step thermomechanical treatment (7%+1000 DEG C of cold-rolling deformation
Heat preservation 30min) there are a large amount of low energy crystal boundaries in alloy afterwards, for ratio up to 75.6%, the ratio of wherein 3 crystal boundary of ∑ reaches 63.3%,
Stronger low energy crystal boundary network is formed, the connectivity of wide-angle random grain boundary is interrupted, while there is preferable room-temperature mechanical property,
Meet GJB 5723-2006《Resistant to hydrogen steel plate specification》Requirement.
Embodiment 3：
Difference from Example 1 is that the thickness of J75 sheet alloys used is 4.0mm, is become using 10% cold rolling
The soaking time of shape and 900 DEG C, 60min, the 3 crystal boundary ratio of ∑ in alloy reach 50.9%, and low energy crystal boundary ratio is
62.8%.
Using the alloy hot rolled materials of J75 of 4.0mm thickness identical with 1 chemical composition of embodiment, heat engine processing is carried out.
980 DEG C of heat preservation 2h, subsequent Water Quenching；After carrying out 10% cold-rolling deformation, 900 DEG C, the isothermal holding of 60min are carried out, then
Water cooling is to room temperature.Sample after single step thermomechanical treatment keeps the temperature 16h at 720 DEG C, and taking-up is air-cooled to room temperature.It is carried out using EBSD brilliant
As a result boundary's structural analysis shows that 3 crystal boundary ratio of ∑ reaches 50.9% in alloy, low energy crystal boundary ratio reaches 62.8%, wide-angle
The connectivity of random grain boundary is interrupted, and different type low energy crystal boundary ratio is shown in Table 5.J75 Jing Guo single step thermomechanical treatment is closed
Golden plate material, with reference to GB/T 228.1《Metal material stretching test part 1 room temperature test method》Carry out Mechanics Performance Testing, knot
Fruit shows that its yield strength be more than 710MPa, tensile strength be more than 1055MPa, elongation percentage is more than 31.5%, meets GJB 5723-
2006《Resistant to hydrogen steel plate specification》Requirement, the results are shown in Table 6.
5 different type low energy crystal boundary ratio of table
6. single step thermomechanical treatment J75 alloy mechanical properties of table
The present embodiment plate thickness is the J75 sheet alloys of 4.0mm, through single step thermomechanical treatment (10%+900 DEG C of cold-rolling deformation
Heat preservation 60min) occur a large amount of low energy crystal boundaries in alloy afterwards, for ratio up to 62.8%, 3 crystal boundary ratio of ∑ reaches 50.9%, formed compared with
Strong low energy crystal boundary network, interrupts the connectivity of wide-angle random grain boundary, while having preferable room-temperature mechanical property.
Embodiment the result shows that, using in the process parameters range of technical solution of the present invention, the object of the invention can be achieved,
The 3 crystal boundary ratio of ∑ for effectively improving low energy crystal boundary, particularly low energy, is formed simultaneously stronger low energy crystal boundary network, interrupts big angle
The connectivity of random grain boundary is spent, and keeps preferable room-temperature mechanical property.
Claims (5)
1. a kind of improving low energy crystal boundary ratio method in iron nickel base alloy by single step thermomechanical treatment, which is characterized in that use
Single step thermomechanical treatment process, it is 60~85% to make the low coincidence site lattice crystal boundary ratio of ∑≤29 in alloy, and wherein ∑ 3 is brilliant
The ratio on boundary is not less than 50%, includes the following steps：
(1) iron nickel base alloy plank is subjected to solution treatment, processing method is that 0.5~2h is kept the temperature at 970~990 DEG C；
(2) the iron nickel base alloy plank of isothermal holding in step (1) is subjected to Water Quenching；
(3) by the iron nickel base alloy plank after Water Quenching in step (2), cold-rolling deformation is carried out, deflection is 4~10%；
(4) by step (3) cold-rolling deformation, treated that iron nickel base alloy plank keeps the temperature 20~120min at 900~1050 DEG C, with
Water cooling is to room temperature afterwards；
(5) the iron nickel base alloy plank after step (4) water-cooled process keeps the temperature to 14 at 710~730 DEG C~for 24 hours, it then takes out empty
It is cooled to room temperature.
2. described in accordance with the claim 1 improve low energy crystal boundary ratio method in iron nickel base alloy by single step thermomechanical treatment,
It is characterized in that, the thickness range of iron nickel base alloy plank is 2~4mm.
3. described in accordance with the claim 1 improve low energy crystal boundary ratio method in iron nickel base alloy by single step thermomechanical treatment,
It is characterized in that, the trade mark of iron nickel base alloy is J75.
4. described in accordance with the claim 1 improve low energy crystal boundary ratio method in iron nickel base alloy by single step thermomechanical treatment,
It is characterized in that, introducing a high proportion of low energy crystal boundary in the alloy, more low energy crystal boundary network is formed, random wide-angle is interrupted
The connectivity of crystal boundary.
5. described in accordance with the claim 1 improve low energy crystal boundary ratio method in iron nickel base alloy by single step thermomechanical treatment,
It is characterized in that, extension test is with reference to GB/T 228.1《Metal material stretching test part 1 room temperature test method》It carries out, closes
Golden mechanical property meets GJB 5723-2006《Resistant to hydrogen steel plate specification》Requirement.
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Cited By (5)
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| CN110964995A (en) * | 2019-11-27 | 2020-04-07 | 中国科学院金属研究所 | Increase sigma 3 IN IN718 nickel-base superalloynMethod for proportion of type crystal boundary |
| CN111155020A (en) * | 2020-01-20 | 2020-05-15 | 东南大学 | Method for regulating and controlling corrosion resistance of CoNiFe intermediate entropy alloy |
| CN111534719A (en) * | 2020-05-09 | 2020-08-14 | 中国科学院金属研究所 | Nickel-cobalt-based wrought high-temperature alloy and preparation method thereof |
| CN112877628A (en) * | 2021-01-13 | 2021-06-01 | 重庆大学 | Coordination optimization method and system for low-energy grain boundary density and grain size |
| CN115679230A (en) * | 2022-10-25 | 2023-02-03 | 重庆理工大学 | Surface treatment process for improving hydrogen embrittlement resistance of nickel-based corrosion-resistant alloy |
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| CN110964995A (en) * | 2019-11-27 | 2020-04-07 | 中国科学院金属研究所 | Increase sigma 3 IN IN718 nickel-base superalloynMethod for proportion of type crystal boundary |
| CN111155020A (en) * | 2020-01-20 | 2020-05-15 | 东南大学 | Method for regulating and controlling corrosion resistance of CoNiFe intermediate entropy alloy |
| CN111534719A (en) * | 2020-05-09 | 2020-08-14 | 中国科学院金属研究所 | Nickel-cobalt-based wrought high-temperature alloy and preparation method thereof |
| CN112877628A (en) * | 2021-01-13 | 2021-06-01 | 重庆大学 | Coordination optimization method and system for low-energy grain boundary density and grain size |
| CN112877628B (en) * | 2021-01-13 | 2021-09-21 | 重庆大学 | Coordination optimization method and system for low-energy grain boundary density and grain size |
| CN115679230A (en) * | 2022-10-25 | 2023-02-03 | 重庆理工大学 | Surface treatment process for improving hydrogen embrittlement resistance of nickel-based corrosion-resistant alloy |
| CN115679230B (en) * | 2022-10-25 | 2024-01-05 | 重庆理工大学 | Surface treatment process for improving hydrogen embrittlement resistance of nickel-based corrosion-resistant alloy |
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