CN106048483A - Method for improving plastic toughness of CuNiMnFe alloy - Google Patents
Method for improving plastic toughness of CuNiMnFe alloy Download PDFInfo
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- CN106048483A CN106048483A CN201610573586.XA CN201610573586A CN106048483A CN 106048483 A CN106048483 A CN 106048483A CN 201610573586 A CN201610573586 A CN 201610573586A CN 106048483 A CN106048483 A CN 106048483A
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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
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
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Abstract
The invention discloses a method for improving plastic toughness of a CuNiMnFe alloy. Firstly, the CuNiMnFe alloy subjected to vacuum induction smelting is subjected to solution treatment; and then the CuNiMnFe alloy subjected to the solution treatment is placed in a hot pressing mold to be subjected to aging treatment under pressure stress, and the CuNiMnFe alloy good in the plastic toughness is obtained. According to the method, a pressure stress effect is applied in the aging treatment process of the CuNiMnFe alloy, because of the dual effect of temperature and the pressure stress, the original dendritic microstructure of the CuNiMnFe alloy is refined, and the variety, the number, the morphology, the size and the orientation of strengthening phases are adjusted and controlled by changing the precipitation process of the strengthening phases. The CuNiMnFe alloy subjected to the aging treatment under the pressure stress effect has very high strength and hardness, meanwhile, good plastic toughness is kept, the tensile strength of the CuNiMnFe alloy subjected to the aging treatment under the pressure stress effect can reach 750 Mpa or above, and the elongation is larger than 6%.
Description
Technical field
The invention belongs to alloy material Strengthening and Toughening field, be specifically related to a kind of side improving CuNiMnFe alloy plasticity and toughness
Method.
Background technology
CuNiMnFe alloy belongs to typical precipitation strength type alloy, is a kind of Novel high-elasticity high intensity polynary copper alloy
Material.This alloy is widely used in the fields such as manned space flight, satellite navigation system, coal seam exploitation, electronics industry, owing to it is at thing
Reason aspect of performance shows non-magnetic characteristic, thus is also widely used in terms of high intensity NULL.At present,
The schedule of reinforcement of CuNiMnFe alloy is mainly solution strengthening, the mode such as refined crystalline strengthening and precipitation strength, but due to CuNiMnFe
Alloy is a kind of multicomponent copper alloy, component segregation and thick dendrite easily occurs, be additionally, since Fe and exist in process of setting
Solid solubility in Cu differs greatly from high temperature to room temperature, cause in alloy Fe element in temperature-fall period precipitation and with Mn element shape
Intermetallic compound is become to be present in crystal boundary and interdendritic, although high intensity can be obtained thereby through these schedule of reinforcements
CuNiMnFe alloy, but in the gathering of this crystal boundary compound and alloy structure, the segregation etc. of composition has had a strong impact on alloy
Plasticity, causes brittle fracture often occur during some important spare parts use, and its percentage elongation is less than 4%.
Summary of the invention
It is an object of the invention to provide a kind of method improving CuNiMnFe alloy plasticity and toughness, solve existing schedule of reinforcement
The problem that lower CuNiMnFe alloy plasticity and toughness are relatively low.
The technical solution adopted in the present invention is, a kind of method improving CuNiMnFe alloy plasticity and toughness, first to vacuum
CuNiMnFe alloy after induction melting carries out solution treatment, then the CuNiMnFe alloy after solution treatment is positioned over hot pressing
Mould carries out Ageing Treatment under compressive stress, obtains the CuNiMnFe alloy that plasticity and toughness are good.
The feature of the present invention also resides in,
CuNiMnFe alloy solid solution process: as cast condition CuNiMnFe alloy is positioned in batch-type furnace, set solid solubility temperature as
520 ± 3 DEG C, temperature retention time is 60min, and shrend is to room temperature.
The detailed process that under compressive stress, CuNiMnFe alloy aging processes is: put by the CuNiMnFe alloy after solution treatment
Being placed in hot pressing die, then put into by hot pressing die in atmosphere protection hot-pressed sintering furnace, whole ag(e)ing process is at H2Atmosphere is protected
Protecting down and complete, heating 20min is 430 ± 3 DEG C to aging temp, is incubated 720min～2880min, gives hot-die in heating process
Tool pressurization 5～20Mpa, after the CuNiMnFe alloy aging time reaches respective settings value, furnace cooling, cooling procedure is at N2Gas
Complete under atmosphere protection.
The invention has the beneficial effects as follows, a kind of method improving CuNiMnFe alloy plasticity and toughness of the present invention, by
CuNiMnFe alloy aging processing procedure applies an action of compressive stress, due to the dual function of temperature Yu compressive stress, refines
CuNiMnFe alloy original dendrite tissue, regulates and controls the kind of hardening constituent, quantity, shape by changing the precipitation process of hardening constituent
Looks, size and orientation.CuNiMnFe alloy after Ageing Treatment under action of compressive stress except have the highest intensity with
Outside hardness, the most also keeping good plasticity and toughness, its tensile strength is up to more than 750Mpa, and percentage elongation is more than 6%.
Accompanying drawing explanation
Fig. 1 is the CuNiMnFe alloy structure after nothing pressure Ageing Treatment；
Fig. 2 is the CuNiMnFe alloy structure under embodiment 2 compressive stress after Ageing Treatment；
Fig. 3 is the CuNiMnFe strength of alloy curve under embodiment 2 compressive stress after Ageing Treatment.
Detailed description of the invention
The present invention is described in detail with detailed description of the invention below in conjunction with the accompanying drawings.
The present invention improves the method for CuNiMnFe alloy plasticity and toughness, first carries out as cast condition CuNiMnFe alloy at solid solution
Reason, is then positioned over the CuNiMnFe alloy after solution treatment in hot pressing die and carries out Ageing Treatment under action of compressive stress,
To the CuNiMnFe alloy that plasticity and toughness are good.
Concretely comprise the following steps:
Step 1, is positioned over as cast condition CuNiMnFe alloy in batch-type furnace, sets solid solubility temperature as 520 ± 3 DEG C, during insulation
Between be 60min, shrend to room temperature, with standby behind sand papering surface；
Step 2, is positioned over the CuNiMnFe alloy after solution treatment in hot pressing die, then hot pressing die is put into gas
In atmosphere protection hot-pressed sintering furnace, in order to prevent CuNiMnFe alloy in ag(e)ing process from aoxidizing, to atmosphere protection hot pressed sintering
Stove is passed through H2, heating 20min is 430 ± 3 DEG C to aging temp, is incubated 720min～2880min, gives hot pressing in heating process
Mould pressurizing 5～20Mpa, after the CuNiMnFe alloy aging time reaches respective settings value, furnace cooling, cooling procedure is at N2
Complete under atmosphere protection, obtain the CuNiMnFe alloy that plasticity and toughness are good.
Under action of compressive stress, Ageing Treatment can make CuNiMnFe alloy structure refine, and can change in alloy structure simultaneously
The precipitation process of hardening constituent.Under action of compressive stress in ageing process, different value of compressive stress can cause CuNiMnFe alloy
Tissue produces the tissue defects such as dislocation of varying number, thus for the forming core of secondary phase and growth offer condition, owing to pressure should
Power and the dual function of temperature, CuNiMnFe alloy is meeting occurrence dynamics buy back policy in ageing process so that close
Payment organization pattern is changed to equiax crystal by raw element tree dendrite, and then is combined raising by modes such as refined crystalline strengthening and precipitation strengths
CuNiMnFe alloy plasticity.
The present invention improves the method for CuNiMnFe alloy plasticity and toughness, and under action of compressive stress, the CuNiMnFe after Ageing Treatment closes
Payment organization is evenly distributed, and the most also keeps higher intensity hardness and good plasticity and toughness, and its tensile strength reaches as high as
More than 880Mpa, percentage elongation is more than 6%, and which is simple to operate, and strengthening effect is notable, environmental protection.
Embodiment 1
Under action of compressive stress, CuNiMnFe alloy aging processes and improves plasticity and toughness, and as cast condition CuNiMnFe alloy is processed into chi
Very little for 16mm × 16mm × 100mm cuboid；
CuNiMnFe alloy after processing is positioned in SX-10-12 chamber type electric resistance furnace, sets solid solubility temperature as 520 DEG C,
Temperature retention time is 60min, shrend to room temperature, with standby behind sand papering surface；
CuNiMnFe alloy after solution treatment is positioned over the hot-die in SLQ-16B type atmosphere protection hot-pressed sintering furnace
In tool, in order to prevent alloy from aoxidizing, in atmosphere protection hot-pressed sintering furnace, it is passed through H2, heating 20min to aging temp is
430 DEG C, it is incubated 1440min, to hot pressing die pressurization 5Mpa in insulating process, treats that the CuNiMnFe alloy aging time reaches corresponding
After setting value, furnace cooling, cooling procedure is at N2Complete under atmosphere protection, obtain the CuNiMnFe alloy that plasticity and toughness are good, its
Tensile strength is up to 750MPa, and percentage elongation is up to 10%.
Embodiment 2
Under action of compressive stress, CuNiMnFe alloy aging processes and improves plasticity and toughness, and as cast condition CuNiMnFe alloy is processed into chi
Very little for 16mm × 16mm × 100mm cuboid；
CuNiMnFe alloy after processing is positioned in SX-10-12 chamber type electric resistance furnace, sets solid solubility temperature as 517 DEG C,
Temperature retention time is 60min, shrend to room temperature, with standby behind sand papering surface；
CuNiMnFe alloy after solution treatment is positioned over the hot-die in SLQ-16B type atmosphere protection hot-pressed sintering furnace
In tool, in order to prevent alloy from aoxidizing, in atmosphere protection hot-pressed sintering furnace, it is passed through H2, heating 20min to aging temp is
428 DEG C, it is incubated 2160min, to hot pressing die pressurization 15Mpa in insulating process, treats that the CuNiMnFe alloy aging time reaches phase
After answering setting value, furnace cooling, cooling procedure is at N2Complete under atmosphere protection, obtain the CuNiMnFe alloy that plasticity and toughness are good,
Its tensile strength is up to 824MPa, and percentage elongation is up to 9%.
Fig. 1 is the CuNiMnFe alloy structure after nothing pressure Ageing Treatment, presents dendrite mode and grows.
Fig. 2 is the CuNiMnFe alloy structure under embodiment 2 compressive stress after Ageing Treatment, it can be seen that action of compressive stress
After lower Ageing Treatment, CuNiMnFe alloy structure is substantially refined, dendrite become equiax crystal, organizes more uniform.Due to
Refined crystalline strengthening and the common effect of precipitation strength, make CuNiMnFe alloy have higher elongation while keeping high intensity
Rate.
Fig. 3 is that under embodiment 3 compressive stress, CuNiMnFe alloy after Ageing Treatment carries out stretching experiment, the tension obtained
Intensity curve, under embodiment, CuNiMnFe strength of alloy is 823.65Mpa as can see from Figure 3, and percentage elongation is
8.64%.
Embodiment 3
Under action of compressive stress, CuNiMnFe alloy aging processes and improves plasticity and toughness, and as cast condition CuNiMnFe alloy is processed into chi
Very little for 16mm × 16mm × 100mm cuboid；
CuNiMnFe alloy after processing is positioned in SX-10-12 chamber type electric resistance furnace, sets solid solubility temperature as 523 DEG C,
Temperature retention time is 60min, shrend to room temperature, with standby behind sand papering surface；
CuNiMnFe alloy after solution treatment is positioned over the hot-die in SLQ-16B type atmosphere protection hot-pressed sintering furnace
In tool, in order to prevent alloy from aoxidizing, in atmosphere protection hot-pressed sintering furnace, it is passed through H2, heating 20min to aging temp is
433 DEG C, it is incubated 1440min, to hot pressing die pressurization 20Mpa in insulating process, treats that the CuNiMnFe alloy aging time reaches phase
After answering setting value, furnace cooling, cooling procedure is at N2Complete under atmosphere protection, obtain the CuNiMnFe alloy that plasticity and toughness are good,
Its tensile strength is up to 880MPa, and percentage elongation is up to 6%.
Embodiment 4
Under action of compressive stress CuNiMnFe alloy aging strengthening, as cast condition CuNiMnFe alloy is processed into a size of 16mm ×
16mm × 100mm cuboid；
CuNiMnFe alloy after processing is positioned in SX-10-12 chamber type electric resistance furnace, sets solid solubility temperature as 521 DEG C,
Temperature retention time is 60min, shrend to room temperature, with standby behind sand papering surface；
CuNiMnFe alloy after solution treatment is positioned over the hot-die in SLQ-16B type atmosphere protection hot-pressed sintering furnace
In tool, in order to prevent alloy from aoxidizing, in atmosphere protection hot-pressed sintering furnace, it is passed through H2, heating 20min to aging temp is
427 DEG C, it is incubated 2880min, to hot pressing die pressurization 17.5Mpa in insulating process, treats that the CuNiMnFe alloy aging time reaches
After respective settings value, furnace cooling, cooling procedure is at N2Complete under atmosphere protection, obtain the good CuNiMnFe of plasticity and toughness and close
Gold.
Embodiment 5
Under action of compressive stress CuNiMnFe alloy aging strengthening, as cast condition CuNiMnFe alloy is processed into a size of 16mm ×
16mm × 100mm cuboid；
CuNiMnFe alloy after processing is positioned in SX-10-12 chamber type electric resistance furnace, sets solid solubility temperature as 519 DEG C,
Temperature retention time is 60min, shrend to room temperature, with standby behind sand papering surface；
CuNiMnFe alloy after solution treatment is positioned over the hot-die in SLQ-16B type atmosphere protection hot-pressed sintering furnace
In tool, in order to prevent alloy from aoxidizing, in atmosphere protection hot-pressed sintering furnace, it is passed through H2, heating 20min to aging temp is
430 DEG C, it is incubated 720min, to hot pressing die pressurization 10Mpa in insulating process, treats that the CuNiMnFe alloy aging time reaches corresponding
After setting value, furnace cooling, cooling procedure is at N2Complete under atmosphere protection, obtain the CuNiMnFe alloy that plasticity and toughness are good.
Claims (3)
1. the method improving CuNiMnFe alloy plasticity and toughness, it is characterised in that after first to vacuum induction melting
CuNiMnFe alloy carries out solution treatment, is then positioned in hot pressing die by the CuNiMnFe alloy after solution treatment and presses
Ageing Treatment under stress, obtains the CuNiMnFe alloy that plasticity and toughness are good.
The method improving CuNiMnFe alloy plasticity and toughness the most according to claim 1, it is characterised in that described CuNiMnFe
Alloy solid solution processes: be positioned in batch-type furnace by as cast condition CuNiMnFe alloy, sets solid solubility temperature as 520 ± 3 DEG C, temperature retention time
For 60min, shrend is to room temperature.
The method improving CuNiMnFe alloy plasticity and toughness the most according to claim 1 and 2, it is characterised in that under compressive stress
The detailed process that CuNiMnFe alloy aging processes is: be positioned in hot pressing die by the CuNiMnFe alloy after solution treatment,
Then being put into by hot pressing die in atmosphere protection hot-pressed sintering furnace, whole ag(e)ing process is at H2Complete under atmosphere protection, heating
20min is 430 ± 3 DEG C to aging temp, be incubated 720min～2880min, in heating process to hot pressing die pressurization 5～
20Mpa, after the CuNiMnFe alloy aging time reaches respective settings value, furnace cooling, cooling procedure is at N2Under atmosphere protection
Complete.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108690943A (en) * | 2018-05-29 | 2018-10-23 | 西安理工大学 | A method of improving Cu-Ni-Mn-Fe alloy mechanical properties |
| CN110804717A (en) * | 2019-11-20 | 2020-02-18 | 中南大学 | Method for refining grain structure of GH4169 alloy forging |
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| CN101177049A (en) * | 2007-11-23 | 2008-05-14 | 中南大学 | Method for preparing Cu-TiNi composite material |
| CN102051563A (en) * | 2010-12-10 | 2011-05-11 | 燕山大学 | Aging process of 7075 aluminum alloy |
| CN105518166A (en) * | 2013-08-13 | 2016-04-20 | Jx日矿日石金属株式会社 | Copper alloy sheet having excellent conductivity and bending deflection factor |
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2016
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| CN101177049A (en) * | 2007-11-23 | 2008-05-14 | 中南大学 | Method for preparing Cu-TiNi composite material |
| CN102051563A (en) * | 2010-12-10 | 2011-05-11 | 燕山大学 | Aging process of 7075 aluminum alloy |
| CN105518166A (en) * | 2013-08-13 | 2016-04-20 | Jx日矿日石金属株式会社 | Copper alloy sheet having excellent conductivity and bending deflection factor |
Non-Patent Citations (4)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108690943A (en) * | 2018-05-29 | 2018-10-23 | 西安理工大学 | A method of improving Cu-Ni-Mn-Fe alloy mechanical properties |
| CN110804717A (en) * | 2019-11-20 | 2020-02-18 | 中南大学 | Method for refining grain structure of GH4169 alloy forging |
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