CN109763014A - A kind of method of micro-nano granules enhancing metal-base composites - Google Patents
A kind of method of micro-nano granules enhancing metal-base composites Download PDFInfo
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- CN109763014A CN109763014A CN201910022899.XA CN201910022899A CN109763014A CN 109763014 A CN109763014 A CN 109763014A CN 201910022899 A CN201910022899 A CN 201910022899A CN 109763014 A CN109763014 A CN 109763014A
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Abstract
The invention discloses a kind of methods of micro-nano granules enhancing metal-base composites, are related to Material Field, include the following steps, S1) weigh micro-nano enhancing particle；S2) smelting metal obtains melt, melt described in mechanical stirring；S3) accelerate the micro-nano enhancing particle, the melt that the micro-nano enhancing particle is injected in stirring is continued to stir after the micro-nano enhancing particle is exhausted；S4) preheated metallic casting mold casts the melt containing the micro-nano enhancing particle in the metal mold, obtains the micro-nano granules enhancing metal-base composites of Dispersed precipitate.Method of the invention can achieve particle dispersion degree height, the technical effect of high grain volume fraction, and micro-nano granules are not necessarily to preheating when implementation.
Description
Technical field
The present invention relates to the methods of Material Field more particularly to a kind of micro-nano granules enhancing metal-base composites.
Background technique
With advances in technology with the raising of technological level, for structural material, more stringent requirements are proposed to reach specific
Purpose, further increase the requirement such as production efficiency to be satisfied with, either traditional industries or emerging field especially exist
Aerospace field, extensive atomic energy uses field, marine resources development and the field of utilizing.Compared with traditional metal materials,
Metal-base composites is since with better performance and by high praise, superior performance point is mainly manifested in specific strength height, ratio
Modulus height, high temperature resistant, corrosion-resistant etc., these great attentions of special feature performance benefit by various countries' investigation of materials personnel.
Predictably, metal-base composites will become a nowadays major fields of material science and scientific research main attack side
To.
Particle Enhancement Method is one kind by adding corresponding granular materials into basis material to reach improvement composite wood
Expect the material modification method of comprehensive performance (as improved work to break, wearability, hardness etc.).The composite material tool of this particle enhancing
There are higher intensity and hardness, strengthening mechanism is similar with metal precipitation strength, can be explained with dislocation around theory.And one
As for, the particle size of Dispersed precipitate is smaller, and volume fraction is higher, and strengthening effect is better.
Meanwhile the preparation method of particles reiforced metal-base composition is divided according to principle, is broadly divided into solid phase method, liquid phase
Method and in-situ compositing.Wherein liquid phase method because process it is few, simple process and low cost can be realized large-scale industrial production
And favored, specific preparation process has: stirring casting method, liquid metal method of impregnation, spray deposition etc..Wherein stirring casting
The method of making is a kind of relatively simple liquid phase method.However in micro-nano granules reinforced metal based composites preparation at present, there are particles
The problems such as Dispersed precipitate uniformity of reinforcement is poor, granular absorption gas causes wetability poor.Therefore, those skilled in the art
It is dedicated to developing a kind of method of micro-nano granules enhancing metal-base composites, enables the micro-nano of ceramic particle or various metals
Particle realizes Dispersed precipitate in the metal materials such as aluminium alloy, magnesium alloy, steel, and it is micro- to prepare the uniform high-quality of structure property
Nanoparticle-reinforced metal matrix composite material.
Summary of the invention
In view of the above drawbacks of the prior art, the present invention is intended to provide a kind of method, in air or under vacuum environment,
By the method for reinforced phase micro-nano granules high speed or ultrahigh speed (speed 10-1000m/s) continuously or in batches and sufficiently to divide
Scattered mode is injected under corresponding metal bath surface, makes to come into melt using mechanical agitation methods while injecting
Particle dispersion is constantly flowed with melt, to reach the equally distributed effect of micro-nano granules.This method is prepared micro-nano
Particles reiforced metal-base composition quality is higher, and reinforced particulate surface is without gas absorption, improve metal bath with
Intergranular wetability combines the two preferably.
To achieve the above object, the present invention provides a kind of micro-nano granules enhancing metal-base composites method,
It is characterized in that, includes the following steps,
S1 micro-nano enhancing particle) is weighed；
S2) smelting metal obtains melt, melt described in mechanical stirring；
S3) accelerate the micro-nano enhancing particle, the micro-nano enhancing particle is injected into the melt in stirring, to
After the micro-nano enhancing particle is exhausted, continue to stir；
S4) preheated metallic casting mold casts the melt containing the micro-nano enhancing particle in the metal mold,
Obtain the micro-nano granules enhancing metal-base composites of Dispersed precipitate.
Further, the micro-nano enhancing particle is selected from one of ceramic particle or a variety of.
Further, the micro-nano enhancing particle is selected from one of metallic particles or a variety of.
Further, the granularity of the micro-nano enhancing particle is 5nm-10um.
Further, the micro-nano enhancing particle injects the melt in stirring in batches, and every batch of injects process in 2-
It is completed in 30 seconds, every batch of interval 30-240 seconds.
Further, the micro-nano enhancing particle continuously injects the melt in stirring, injects process in 1800s
Interior completion.
Further, the churned mechanically speed is 100-700rpm.
Further, the micro-nano enhancing particle is 0.5-30% in the mass fraction of the melt.
Further, it after micro-nano enhancing Particle Acceleration described in step S3, injects and stirs in initial velocity 10-1000 meter per second
In the melt.
Wherein, ceramic particle can be selected arbitrarily and be not limited to SiC, WC, Al4C3、B4C、ZrB2、TiB2、Al2O3, AlN.Gold
Metal particles can be selected arbitrarily and be not limited to Nb, Zr, V, Mo, Mn.
The present invention is achieved to be had the technical effect that
1, micro-nano reinforced phase particle high speed or ultrahigh speed inject Metal Substrate melt before and inject Metal Substrate melt after,
Particle dispersity is still maintained, the step of metal bath will not be added to because of micro-nano granules and larger change occurs
Change, largely facilitates the Dispersed precipitate of reinforced phase particle, and subsequent job step can be reduced；
2, the volume fraction of micro-nano reinforced phase particle in the melt is improved, to reach high-volume fractional Dispersed precipitate effect
Fruit；
3, micro-nano granules are maintained for enough dispersities before entering Metal Substrate melt, and high speed is injected and persistently stirred
The melt for mixing state is not in that particle is slowly contacted with the large area of metal bath, to significantly reduce metal bath part
Temperature and the case where influence fluidity of molten.Therefore micro-nano reinforced phase particle of the invention before injecting Metal Substrate melt not
Preheating preparation need to particularly be carried out.
Specific embodiment
Multiple preferred embodiments of the invention are introduced below with reference to specification, keep its technology contents more clear and convenient for reason
Solution.The present invention can be emerged from by many various forms of embodiments, and protection scope of the present invention is not limited only to text
In the embodiment mentioned.
Embodiment 1
The present embodiment enhances 6061 acieral composite materials using SiC ceramic particle, and wherein SiC is size in 1-10 μ
The spheric granules of m, target are distributed in particle dispersion in 6061 acieral composite materials, mass fraction 0.5%.
SiC particulate 100g is weighed, granularity is in 1-10 μ m.6061 aluminium alloy of melting 20kg, after aluminum alloy melting
750 DEG C of progress purified treatments are increased to, 45min is kept the temperature, then open mechanical stirring device, keep mechanical stirring state, stirring
Speed is 300-500rpm.
Accelerate SiC particulate, in the state that initial velocity is 30-60m/s, particle uniformly continuous is injected to aluminium alloy melt, it is whole
A process controls acceleration emitter in completing in 300s, keeps the granule number error of injection per second within 10%.Particle
After all injecting aluminium alloy melt, it is kept stirring operation 10-120min.
Finally, the melt of device for opening flows out valve, melt temperature is kept to cast in metal mold at 720~750 DEG C,
Metal mold preheats 400 DEG C, and obtaining 0.5wt%SiC particle after casting mold solidification enhances 6061 aluminum matrix composites.
Detection for sample should be able to see that the volume fraction of particle is 0.42% in the secure execution mode (sem, and the average distance of distribution is
2.31-23.18μm。
Embodiment 2
The present embodiment enhances 6061 acieral composite materials using SiC ceramic particle, and wherein SiC is size in 1-10 μ
The spheric granules of m, target are distributed in particle dispersion in 6061 acieral composite materials, mass fraction 20%.
SiC particulate 2kg is weighed, granularity is in 1-10 μ m.6061 aluminium alloy of melting 20kg, after aluminum alloy melting
750 DEG C of progress purified treatments are increased to, 45min is kept the temperature, then open mechanical stirring device, keep mechanical stirring state, stirring
Speed is 300-500rpm.
Accelerate SiC particulate, in the state that initial velocity is 70-100m/s, particle uniformly continuous is injected to aluminium alloy melt, it is whole
A process controls acceleration emitter in completion in 25min (1500s), keeps the granule number error of injection per second 10%
Within.After particle all injects aluminium alloy melt, it is kept stirring operation 10-120min.
Finally, the melt of device for opening flows out valve, melt temperature is kept to cast in metal mold at 720~750 DEG C,
Metal mold preheats 400 DEG C, and obtaining 20.0wt%SiC particle after casting mold solidification enhances 6061 aluminum matrix composites.
Detection for sample should be able to see that the volume fraction of particle is 7.86% in the secure execution mode (sem, and the average distance of distribution is
2.33~23.34 μm.
Embodiment 3
The present embodiment is that SiC enhances AZ31 composite material of magnesium alloy, and wherein SiC is spheric granules of the size in 5-10nm,
Target is distributed in particle dispersion in AZ31 magnesium-based composite material, mass fraction 10%.
SiC particulate 1kg is weighed, granularity is within the scope of 5-10nm.Melting 10kg AZ31 magnesium alloy, to magnesium alloy 630
After DEG C fusing, 650 DEG C of heat preservation 60min are increased to, then open mechanical stirring device, holding mechanical stirring state, mixing speed
For 400-700rpm.
Accelerate SiC particulate, in the state that initial velocity is 480-500m/s, injects magnesium alloy fused mass in four batches, every batch of particle is penetrated
Enter process to complete in 2-3s, every batch of particle injects process interval time 180-240s, and controls acceleration emitter, keeps every
The granule number error projected is criticized within 5%.After SiC particulate all injects magnesium alloy fused mass, it is kept stirring operation 10-
120min。
Finally, heating blend melt, the melt of device for opening flows out valve, keeps melt temperature at 650-660 DEG C in gold
Belong to and casting in casting mold, metal mold preheats 300 DEG C.Melting overall process usesMixed gas is as protection gas.Casting
10.0wt%SiC particle enhancing AZ31 metal-base composites is obtained after type solidification.
Detection for sample should be able to see that the volume fraction of particle is 5.152%, the average distance of distribution under the tem
For 13.44~26.88nm.
Embodiment 4
The present embodiment is that SiC enhances AZ31 composite material of magnesium alloy, and wherein SiC is spheric granules of the size in 5-10nm,
Target is distributed in particle dispersion in AZ31 magnesium-based composite material, mass fraction 30%.
SiC particulate 3kg is weighed, granularity is within the scope of 5-10nm.Melting 10kg AZ31 magnesium alloy, to magnesium alloy 630
After DEG C fusing, 650 DEG C of heat preservation 60min are increased to, then open mechanical stirring device, holding mechanical stirring state, mixing speed
For 400-700rpm.
Accelerate SiC particulate, in the state that initial velocity is 600-900m/s, injects magnesium alloy fused mass in four batches, every batch of particle is penetrated
Enter process to complete in 2-30s, every batch of particle injects process interval time 180-240s, and controls acceleration emitter, keeps
The granule number error that every batch of projects is within 5%.After SiC particulate all injects magnesium alloy fused mass, it is kept stirring operation 10-
120min。
Finally, heating blend melt, the melt of device for opening flows out valve, keeps melt temperature at 650-660 DEG C in gold
Belong to and casting in casting mold, metal mold preheats 300 DEG C.Melting overall process usesMixed gas is as protection gas.Casting mold
30.0wt%SiC particle enhancing AZ31 metal-base composites is obtained after solidification.
Detection for sample should be able to see that the volume fraction of particle is 13.96%, the average distance of distribution under the tem
For 7.77-15.53nm.
Embodiment 5
The present embodiment enhances 3A21 acieral composite material using Mn metallic particles, obtains high Mn content aluminium alloy,
Middle Mn is spheric granules of the size at 1-10 μm, and target is distributed in particle dispersion in 3A21 acieral composite material, Mn
Granular mass score is 5%.
Mn particle 2.5kg is weighed, granularity is in 1-10 μ m.Melting 50kg 3A21 aluminium alloy, after aluminum alloy melting
750 DEG C of progress purified treatments are increased to, 10min is kept the temperature, then open mechanical stirring device, keep mechanical stirring state, stirring
Speed is 100-300rpm.
Accelerate Mn particle, in the state that initial velocity is 100-200m/s, point ten batches of injection aluminium alloy melts, every batch of particle is injected
Process is completed in 2-30s, and every batch of particle injects process interval time 60-120s, and controls acceleration emitter, keeps every batch of
The granule number error of injection is within 5%.After Mn particle all injects aluminium alloy melt, it is kept stirring operation 10-120min.
Finally, the melt of device for opening flows out valve, melt temperature is kept to cast in metal mold at 720~750 DEG C,
Metal mold preheats 400 DEG C, and 5wt%Mn particle enhancing 3A21 aluminum matrix composite is obtained after casting mold solidification.
Detection for sample should be able to see that the volume fraction of particle is 1.80% under the tem, and the average distance of distribution is
3.07-30.75μm。
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that the ordinary skill of this field is without wound
The property made labour, which according to the present invention can conceive, makes many modifications and variations.Therefore, all technician in the art
Pass through the available technology of logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Scheme, all should be within the scope of protection determined by the claims.
Claims (9)
1. a kind of method of micro-nano granules enhancing metal-base composites, which is characterized in that include the following steps,
S1 micro-nano enhancing particle) is weighed；
S2) smelting metal obtains melt, melt described in mechanical stirring；
S3) accelerate the micro-nano enhancing particle, the micro-nano enhancing particle is injected into the melt in stirring, to described
After micro-nano enhancing particle is exhausted, continue to stir；
The melt containing the micro-nano enhancing particle is cast in the metal mold, is obtained by S4) preheated metallic casting mold
The micro-nano granules of Dispersed precipitate enhance metal-base composites.
2. a kind of method of micro-nano granules enhancing metal-base composites as described in claim 1, which is characterized in that described
Micro-nano enhancing particle is selected from one of ceramic particle or a variety of.
3. a kind of method of micro-nano granules enhancing metal-base composites as described in claim 1, which is characterized in that described
Micro-nano enhancing particle is selected from one of metallic particles or a variety of.
4. a kind of method of micro-nano granules enhancing metal-base composites as described in claim 1, which is characterized in that described
The granularity of micro-nano enhancing particle is 5nm-10um.
5. a kind of method of micro-nano granules enhancing metal-base composites as described in claim 1, which is characterized in that described
Micro-nano enhancing particle injects the melt in stirring in batches, and every batch of is injected process and completed in 2-30 seconds, every batch of interval 30-
240 seconds.
6. a kind of method of micro-nano granules enhancing metal-base composites as described in claim 1, which is characterized in that described
Micro-nano enhancing particle continuously injects the melt in stirring, and injection process is completed in 1800s.
7. a kind of method of micro-nano granules enhancing metal-base composites as described in claim 1, which is characterized in that described
Churned mechanically speed is 100-700rpm.
8. a kind of method of micro-nano granules enhancing metal-base composites as described in claim 1, which is characterized in that described
Micro-nano enhancing particle is 0.5-30% in the mass fraction of the melt.
9. a kind of method of micro-nano granules enhancing metal-base composites as described in claim 1, which is characterized in that step
After micro-nano enhancing Particle Acceleration described in S3, the melt in stirring is injected in initial velocity 10-1000 meter per second.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1151920A (en) * | 1996-09-26 | 1997-06-18 | 吉林工业大学 | Composite liquid metal processing technology and equipment |
| CN101829777A (en) * | 2010-03-18 | 2010-09-15 | 丁家伟 | Process and equipment for preparing nanoparticle-reinforced metal matrix composite material |
| US20120315399A1 (en) * | 2011-05-03 | 2012-12-13 | Zhili Feng | Method of making nanoparticle reinforced metal matrix components |
| CN103866168A (en) * | 2014-03-17 | 2014-06-18 | 天津理工大学 | Preparation method of nano-particle reinforcement magnesium-based biocomposite material |
| CN108359830A (en) * | 2018-02-28 | 2018-08-03 | 江苏大学 | Al3Co coats Al2O3Nanoparticle reinforced aluminum-based composite and preparation method thereof |
-
2019
- 2019-01-10 CN CN201910022899.XA patent/CN109763014A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1151920A (en) * | 1996-09-26 | 1997-06-18 | 吉林工业大学 | Composite liquid metal processing technology and equipment |
| CN101829777A (en) * | 2010-03-18 | 2010-09-15 | 丁家伟 | Process and equipment for preparing nanoparticle-reinforced metal matrix composite material |
| US20120315399A1 (en) * | 2011-05-03 | 2012-12-13 | Zhili Feng | Method of making nanoparticle reinforced metal matrix components |
| CN103866168A (en) * | 2014-03-17 | 2014-06-18 | 天津理工大学 | Preparation method of nano-particle reinforcement magnesium-based biocomposite material |
| CN108359830A (en) * | 2018-02-28 | 2018-08-03 | 江苏大学 | Al3Co coats Al2O3Nanoparticle reinforced aluminum-based composite and preparation method thereof |
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