CN105506523B - A kind of method for improving forging Mn Cu base damping alloy damping capacities - Google Patents
A kind of method for improving forging Mn Cu base damping alloy damping capacities Download PDFInfo
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- CN105506523B CN105506523B CN201510893405.7A CN201510893405A CN105506523B CN 105506523 B CN105506523 B CN 105506523B CN 201510893405 A CN201510893405 A CN 201510893405A CN 105506523 B CN105506523 B CN 105506523B
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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
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
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Abstract
The method for improving forging Mn Cu base damping alloy damping capacities of the present invention, it is that will carry out subzero treatment by the forging Mn Cu bases damping alloys of solution treatment and Ageing Treatment, Mn Cu base damping alloys are placed in into room temperature environment again after subzero treatment warms naturally to room temperature.To obtain more martensite transfor mation amounts, the forging Mn Cu bases damping alloys for being warming up to room temperature in room temperature environment after subzero treatment can again be carried out subzero treatment, room temperature environment is again placed in after subzero treatment and warms naturally to room temperature, so operated 1~2 time.The present invention can further improve the damping capacity of forging Mn Cu base damping alloys, and acquisition has the Mn Cu base damping alloys of excellent mechanical property and damping capacity concurrently.
Description
Technical field
The invention belongs to damp alloy material field, and in particular to the damping of Mn-Cu base damping alloys is forged in a kind of raising
The method of performance.
Background technology
Mn-Cu base damping alloys are a kind of twin type damping alloys, be mainly characterized by with preferable deformation processing characteristics,
Damping capacity and mechanical property, under relatively low strain amplitude (<4×10-4) also possess preferable damping capacity.It has been applied to machine
The aspects such as tool drive apparatus, radioactivity detection equipment, motorcycle, naval vessel, are vibrated with improving equipment precision and reducing.Mn-Cu is damped
Alloy can occur the martensite changed to face-centered tetragonal structure (FCT) from face-centred cubic structure (FCC, γ phase) in cooling procedure
Phase transformation.The damper mechanism of twin type damping alloy is relevant with the coherence twin-plane boundary being mutually deformed into alloy, in cyclic stress
Under effect, the twin-plane boundary in alloy rearranges motion, produces inelastic strain and makes stress relaxation, so that will be additional
Vibrational energy dissipates, and forms damping vibration attenuation.Mn-Cu damping alloys can be sent out in solid solution, the damping heat treatment process of Ageing Treatment
The martensitic traoformation that life changes from face-centred cubic structure (FCC, γ phase) to face-centered tetragonal structure (FCT).Current Mn-Cu alloys
Damping source is commonly due to martensite-γ boundaries, martensite bar interface and the martensite bar formed during martensite transfor mation
Twin-plane boundary that inside is formed due to shear etc., the motion power consumption under extraneous stress.Therefore martensite quantity and horse are improved
Family name's body interface and its internal density of twin-plane boundary, the mobility at interface are the crucial institutes of the damping capacity for improving Mn-Cu alloys
.
Martensite transformation temperature (the M of Mn-Cu base damping alloyss) and martensite transfor mation end temp (Mf) depend on alloy
The content of middle Mn elements and the uniformity of distribution.Casting Mn-Cu alloys (general manganese content ＜ 70%) using casting aliquation and
The segregation of the spinodal decomposition forming component that Ageing Treatment causes, so that alloy is internally formed Fu Meng areas, makes martensite transfor mation knot
Shu Wendu (Mf) higher, martensite transfor mation is more abundant when alloy is cooled to room temperature, forms substantial amounts of microtwinning and makes it have preferably
Damping capacity.But the casting character of Mn-Cu alloys is bad, and crystallization range is wide, easily there is loose, concentrating shrinkage cavity etc. and lack
Fall into, therefore mechanical performance is undesirable.Forging Mn-Cu alloys are fine and close due to even tissue, and intensity is larger, and mechanical property relatively casts conjunction
Jin Hao, has preferable application prospect on mechanized equipment.Manganese content>Although 80% forging Mn-Cu alloys MfPoint is higher than room
Temperature, can occur more thoroughly " fcc-fct " martensitic traoformation when room temperature is cooled to after solution treatment, obtain preferably damping
Performance, but because Mn contents are high, alloy can be caused to become fragile, elongation percentage and impact toughness decreased.In order to ensure to forge Mn-Cu alloys
Mechanical property, frequently with the Mn-Cu alloys of middle manganese content (manganese content be 70% or so), but so M of alloyfPoint is often low
It is in room temperature therefore insufficient by the transformation of martensite under the conditions of dampingization heat treatment (solution treatment+Ageing Treatment) afterwards room temperature,
There is a certain amount of parent phase to exist after transformation, cause the limited amount of phase transformation twin, damping capacity is undesirable.
The content of the invention
The purpose of the present invention is to solve the shortcomings of the prior art, there is provided a kind of raising forges Mn-Cu base damping alloys
The method of damping capacity, the damping capacity for forging Mn-Cu base damping alloys is improved with further, and acquisition has excellent mechanical property concurrently
With the Mn-Cu base damping alloys of damping capacity.
The method for improving forging Mn-Cu base damping alloy damping capacities of the present invention, will be by solution treatment and timeliness
The forging Mn-Cu bases damping alloy for the treatment of carries out subzero treatment, and Mn-Cu base damping alloys are placed in into room temperature ring again after subzero treatment
Border warms naturally to room temperature.
In the above method, to obtain more martensite transfor mation amounts, will be warmed naturally in room temperature environment after subzero treatment
The forging Mn-Cu bases damping alloy of room temperature carries out subzero treatment again, room temperature environment is again placed in after subzero treatment and is heated up naturally
To room temperature, so operate 1~2 time.
In the above method, the subzero treatment is that Mn-Cu bases damping alloy is cooled into -160 DEG C~-60 DEG C from room temperature,
And it is incubated 0.5~4.5 hour at this temperature.
In the above method, the component of the forging Mn-Cu base damping alloys and the atomicity percentage composition of each component are as follows：
Mn is that 40.0~80.0%, Fe is that 0.5~4.5%, Ni is that 0.2~7.0%, Zn is that 0~5.0%, Al is 0~7.0%, rare earth
Element is 0~2.0%, balance of Cu.
In the above method, the solution treatment is to be incubated 1 hour at 850~900 DEG C, and insulation is water-cooled after terminating, institute
It is that 4h is incubated at 400~450 DEG C to state Ageing Treatment, after insulation terminates, cools to room temperature with the furnace.
Compared with prior art, the invention has the advantages that：
1st, the method for the invention through the forging Mn-Cu bases damping alloy after solution treatment and Ageing Treatment by will carry out
Subzero treatment, greatly improves the martensite transfor mation amount of alloy, martensite interphase density increase, while subzero treatment can refine conjunction
Jin Jing's grain, makes the twin size inside martensite more tiny, the increase of twin-plane boundary density, thus increased damping source interface
Density, further increases damping capacity, and compared to the Mn-Cu base damping alloys for not carrying out subzero treatment, damping capacity can be improved
More than 26% (see each embodiment, comparative example).
2nd, because subzero treatment has refined alloy grain and twin-plane boundary, thus the method for the invention is improving alloy resistance
While damping properties, tensile strength (can improve more than 25%, see each embodiment, comparative example) and the surrender for also improving alloy are strong
Degree, can obtain the Mn-Cu base damping alloys for having excellent mechanical performances and damping capacity concurrently.
3rd, the method for the invention process is simple, the melting, composition and leading Technology for Heating Processing to Mn-Cu alloys are without spy
It is different to require, it is easy to utilize.
Brief description of the drawings
Fig. 1 is that the Internal friction tan δ of the Mn-Cu base damping alloys that embodiment 1 and comparative example 1 are obtained are bent with the change of strain
Line (strain lags behind the phase angle of stress when δ is forced vibration).
(a is closed the XRD spectrum of the Mn-Cu base damping alloys that Fig. 2 is obtained for embodiment 2 and comparative example 2 for embodiment 2
The XRD spectrum of gold, b is the XRD spectrum that comparative example 2 obtains alloy).
500 times of the Mn-Cu base damping alloys that Fig. 3 is obtained for embodiment 3 and comparative example 3 amplify metallographs, and (c is embodiment
3 gained alloys, d is the gained alloy of comparative example 3).
Fig. 4 is the stress strain curve of the Mn-Cu base damping alloys that embodiment 5 and comparative example 5 are obtained.
Anti- mode is embodied
Below by specific embodiment to the side for improving the damping capacity for forging Mn-Cu base damping alloys of the present invention
Method is described further.
The damping capacity of following examples and comparative example gained alloy is carried out by force by Dynamic Mechanical Analyzer DMA-Q800
Compel vibration experiment test (testing changes of the tan δ with alternate strain amplitude), mechanical property passes through stretching experiment (GBT 228.1-
2010) tested with impact experiment (GBT 229-2007).
Embodiment 1
By chemical composition for the Mn-Cu base damping alloys sample of Mn-20.5at%Cu-5.5at%Ni-2.0at%Fe is passed through
1 hour is incubated at 850 DEG C after homogenization heat treatment, forging, is incubated alloy water-cooled (solution treatment) after terminating, then 435
4 hours are incubated at DEG C, insulation cools to room temperature (Ageing Treatment) with the furnace after terminating, then alloy is placed in into cooling in subzero treatment stove
To -160 DEG C of insulation 4.5 hours, insulation is taken out after terminating and is placed in room temperature environment and alloy is warmed naturally to room temperature.
Comparative example 1
Alloying component is same as Example 1, does not carry out subzero treatment, and remaining treatment is same as Example 1.
Embodiment 1 and the gained alloy of comparative example 1 are tested through mechanical property and damping capacity, the results are shown in Table 1.The He of embodiment 1
The tan δ of the Mn-Cu base damping alloys that comparative example 1 is obtained are shown in Fig. 1 with the change curve of strain.
Table 1.
Knowable to Fig. 1 and Biao 1, the damping capacity of Mn-Cu bases damping alloy is increased substantially after subzero treatment, in strain
It is 1 × 10-4When damping capacity improve 35%, as known from Table 1, Mn-Cu bases damping alloy mechanical property is notable after subzero treatment
Improve, tensile strength improves 25%, and yield strength improves 20%.
It can be seen that, improve the damping capacity and mechanical property of Mn-Cu base damping alloys simultaneously using the inventive method.
Embodiment 2
By chemical composition for the Mn-Cu base damping alloys sample of Mn-20.5at%Cu-5.5at%Ni-2.0at%Fe is passed through
1 hour is incubated at 850 DEG C after homogenization heat treatment, forging, is incubated alloy water-cooled after terminating, then insulation 4 is small at 435 DEG C
When, insulation terminate after cool to room temperature with the furnace, then alloy is placed in subzero treatment stove be cooled to -60 DEG C be incubated 0.5 hour, protect
Temperature is taken out to be placed in room temperature environment and treats that alloy warms naturally to room temperature after terminating.
Comparative example 2
Alloying component is same as Example 2, does not carry out subzero treatment, and remaining treatment is same as Example 2.
Embodiment 2 and the gained alloy of comparative example 2 the results are shown in Table 2 through damping capacity and Mechanics Performance Testing.
Table 2.
As known from Table 2, Mn-Cu base of the Mn-Cu bases damping alloy after the gained subzero treatment of embodiment 2 compared to comparative example 2
Damping alloy, damping capacity can improve 26%, and mechanical property is significantly improved, and tensile strength improves 26%.
XRD tests are done to the Mn-Cu base damping alloys that embodiment 2 and comparative example 2 are obtained, Fig. 2 is as a result seen.As can be seen from Figure 2,
Wherein a is the division situation at embodiment 2 gained alloy mother phase (220) peak, and b divides for comparative example 2 gained alloy mother phase (220) peak
Situation is split, the martensite transfor mation amount for calculating Mn-Cu base damping alloys after subzero treatment brings up to 77% from 45%, improves
71% or so.
Embodiment 3
It is Mn-20.5at%Cu-5.5at%Ni-2.0at%Fe-2.1at%Zn-1.5at%Al's by chemical composition
Mn-Cu base damping alloy samples are incubated 1 hour after homogenization heat treatment, forging at 850 DEG C, are incubated alloy water after terminating
It is cold, 4 hours then are incubated at 435 DEG C, insulation cools to room temperature with the furnace after terminating, then alloy is placed in into drop in subzero treatment stove
Extremely -100 DEG C of temperature is incubated 2 hours, and insulation is taken out to be placed in room temperature environment and treats that alloy warms naturally to room temperature after terminating.
Comparative example 3
Alloying component is same as Example 3, does not carry out subzero treatment, and remaining treatment is same as Example 3.
Embodiment 3 and the gained alloy of comparative example 3 the results are shown in Table 3 through damping capacity and Mechanics Performance Testing.
Table 3.
As known from Table 3, Mn-Cu base of the Mn-Cu bases damping alloy after the gained subzero treatment of embodiment 3 compared to comparative example 3
Damping alloy, damping capacity improves 32%, and mechanical property is significantly improved, and tensile strength improves 26%.
The structure of the Mn-Cu base damping alloys obtained by metallography microscope sem observation embodiment 3 and comparative example 3, knot
Fruit sees Fig. 3.As can be seen from Figure 3, the feather organization of Mn-Cu bases damping alloy is thinner after subzero treatment.
Embodiment 4
By chemical composition for the Mn-Cu bases of Mn-18.0at%Cu-6.5at%Ni-1.0at%Fe-0.8at%Ce are damped
Alloy sample is incubated 1 hour after homogenization heat treatment, forging at 850 DEG C, is incubated alloy water-cooled after terminating, then 435
4 hours are incubated at DEG C, insulation cools to room temperature with the furnace after terminating, then alloy is placed in subzero treatment stove is cooled to -120 DEG C of guarantors
Temperature 1.5 hours, insulation is taken out to be placed in room temperature environment and treats that alloy warms naturally to room temperature after terminating.
Comparative example 4
Alloying component is same as Example 4, does not carry out subzero treatment, and remaining treatment is same as Example 4.
Embodiment 4 and the gained alloy of comparative example 4 the results are shown in Table 4 through damping capacity and Mechanics Performance Testing.
Table 4.
As known from Table 4, the alloy after the gained subzero treatment of embodiment 4 improves compared to the alloy damping characteristic of comparative example 4
30%, mechanical property is significantly improved, and tensile strength improves 27%.
Embodiment 5
By chemical composition for the Mn-Cu base damping alloys sample of Mn-20.5at%Cu-5.5at%Ni-2.0at%Fe is passed through
Carry out within 1 hour solution treatment in 850 DEG C of insulations after homogenization heat treatment, forging, solution treatment terminate after by alloy water-cooled, then
4 hours are incubated at 435 DEG C, insulation cools to room temperature with the furnace after terminating, then alloy is placed at the deep cooling that temperature is -100 DEG C
1.5 hours are incubated in reason stove, insulation takes out to be placed in room temperature environment after terminating makes alloy warm naturally to room temperature, then alloy is put
- 100 DEG C are cooled in subzero treatment stove and are incubated 1.5 hours, insulation is taken out to be placed in room temperature environment and treats alloy nature after terminating
It is warming up to room temperature.
Comparative example 5
Alloy sample is same as Example 5, does not carry out subzero treatment, and remaining treatment is same as Example 5.
Embodiment 5 and the gained alloy of comparative example 5 the results are shown in Table 5 through damping capacity and Mechanics Performance Testing, and stress strain curve is shown in
Fig. 4.
Table 5.
As seen from Table 5, the Mn-Cu bases damping alloy after the gained subzero treatment of embodiment 5 compares the gained Mn-Cu of comparative example 5
Base damping alloy, damping capacity improves 28%, and knowable to table 5 and Fig. 4, mechanical property is significantly improved, the tensile strength of alloy
Improve 25%, Rp0.2 and improve 20%.
Claims (3)
1. it is a kind of improve forging Mn-Cu base damping alloy damping capacities method, it is characterised in that will by solution treatment and when
The forging Mn-Cu bases damping alloy for imitating treatment carries out subzero treatment, and Mn-Cu base damping alloys are placed in into room temperature again after subzero treatment
Naturally is warming up to room temperature, and the subzero treatment is that Mn-Cu bases damping alloy is cooled into -160 DEG C~-60 DEG C from room temperature,
And it is incubated 0.5~4.5 hour at this temperature.
2. the method for improving forging Mn-Cu base damping alloy damping capacities according to claim 1, it is characterised in that by deep cooling
The forging Mn-Cu bases damping alloy for warming naturally to room temperature in room temperature environment after treatment carries out subzero treatment, subzero treatment again
After be again placed in room temperature environment and warm naturally to room temperature, so operate 1~2 time.
3. it is according to claim 1 or claim 2 to improve the method for forging Mn-Cu base damping alloy damping capacities, it is characterised in that institute
The atomicity percentage composition for stating the component and each component for forging Mn-Cu base damping alloys is as follows：Mn is for 40.0~80.0%, Fe
0.5~4.5%, Ni are that 0.2~7.0%, Zn is that 0~5.0%, Al is 0~7.0%, and rare earth element is 0~2.0%, balance of
Cu。
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| CN104120314A (en) * | 2014-08-12 | 2014-10-29 | 天津银龙高科新材料研究院有限公司 | High-damping MnCu alloy and powdery metallurgy preparation technology thereof |
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