CN106555141A - A kind of heat treatment method of wear-resistant aluminum alloy - Google Patents
A kind of heat treatment method of wear-resistant aluminum alloy Download PDFInfo
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- CN106555141A CN106555141A CN201611083119.5A CN201611083119A CN106555141A CN 106555141 A CN106555141 A CN 106555141A CN 201611083119 A CN201611083119 A CN 201611083119A CN 106555141 A CN106555141 A CN 106555141A
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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
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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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
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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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
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
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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
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/05—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
Abstract
The invention discloses a kind of heat treatment method of wear-resistant aluminum alloy, comprises the following steps：(1) wear-resistant aluminum alloy is placed in into 550～570 DEG C of 3～6h of high temperature solid solution, then inserts the tank quenching that temperature is 55～65 DEG C；(2) wear-resistant aluminum alloy after step (1) process is placed into 10～24 hours at room temperature；(3) wear-resistant aluminum alloy after step (1) process is placed at a temperature of 170～200 DEG C and is incubated 4～10 hours, air cooling of finally coming out of the stove.The wear-resistant aluminum alloy of the present invention is gone bad long needle-like Fe phase using Mn Cr elements compoundings, Fe phase morphologies in alloy are optimized, after heat treatment alloy rigidity value is significantly improved, anti-wear performance is lifted, mechanical property improves, and especially its mechanical properties decrease amplitude is very low at high temperature.
Description
Technical field
The present invention relates to field of aluminum alloys, more particularly to a kind of heat treatment method of wear-resistant aluminum alloy.
Background technology
Aluminium alloy is the second largest structural metallic materials for being only second to ferrous materials, and the recycling of the miscellaneous aluminium that gives up is that society can
The inevitable requirement of sustainable development.Due to being engaged or be connected using Fe bases with Fe base members during aluminium alloy part use
Part is assembled, therefore high Fe contents are often presented after miscellaneous alum recovery remelting of giving up, and mass ratio is typically more than 0.6% or even high
Up to 2～3%.Fe phases are a kind of effective hard particles for improving aluminum alloy hardness and wearability, Publication No.
The Chinese invention patent of CN104451280A discloses a kind of wear-resistant aluminium alloy material containing Fe, and its preparation process adopts powder pressure
After system, the high temperature sintering method of forming prepares a kind of wear-resistant aluminum alloy, with good normal temperature mechanical performance, improves the wear-resisting of alloy
Performance.But the technique carries out powder compacting firstly the need of powder is prepared, then, forming process is complex, relatively costly, unfavorable
In actual production.
And Fe is mainly present with acicular beta-Fe phases form in aluminium alloy, serious isolates matrix, the mechanical property to aluminium alloy
Can harm it is huge, and there is no particularly effective except Fe technologies at present, Fe phase morphologies be controlled so as to which it is to improve to be changed into granular
The effective way of rich Fe secondary aluminium alloys material property, in addition to Fe elements, also includes Zn, Mg, Pb in secondary aluminium alloy
Deng major impurity element.About 80% secondary aluminium alloy is mainly used in the parts of automobile engine to realize the light of automobile at present
Quantify, such as the parts such as the cylinder sleeve of automobile, piston, brake disc, brake rim, and the parts of the type then need higher resistance to height
Warm polishing machine and mechanical behavior under high temperature.And the relatively low wearability of aluminium alloy itself to limit aluminum products special in auto parts and components
It is the extensive application on wear parts.In the situation that cannot effectively remove Fe in secondary aluminium, Fe phases are gone bad, by interior life
Method generates hard particles, obtains and there is high hard wear-resisting alloy system to be the effective way for extending its application, and it is specific to be directed to certain
The aluminium alloy of composition, heat treatment are further to optimize aluminum alloy organization, are mutually to improve its power using the ageing strengthening of disperse educt
Learn important channel and the means of performance.
The content of the invention
It is in order to overcome the disadvantages mentioned above of prior art and deficiency, for a kind of specific antifriction alloy system, of the invention
Purpose is to provide a kind of heat treatment method of wear-resistant aluminum alloy, being capable of Mg significantly in refining alloy2The form of Si phases, improves and closes
The hardness of gold, wearability and tensile strength, are particularly its mechanical behavior under high temperature and are obviously improved.
The purpose of the present invention is achieved through the following technical solutions：
A kind of heat treatment method of wear-resistant aluminum alloy, the composition of the wear-resistant aluminum alloy contain by weight percentage：
Balance of aluminium；
The heat treatment method is comprised the following steps：
(1) wear-resistant aluminum alloy is placed in into 550～570 DEG C of 3～6h of high temperature solid solution, then inserts the water that temperature is 55～65 DEG C
Groove quenches；
(2) wear-resistant aluminum alloy after step (1) process is placed into 10～24 hours at room temperature；
(3) wear-resistant aluminum alloy after step (1) process is placed at a temperature of 170～200 DEG C and is incubated 4～10 hours, most
After come out of the stove air cooling.
The wear-resistant aluminum alloy is prepared by following methods：
A () is with conjunction in the middle of rich Fe aluminiums, pure Al, pure Mg, Al-10Mn intermediate alloy, Al-10Cr intermediate alloys, Al-10Sr
Gold is raw material, weighs raw material by composition；
B raw material that () fusing step (a) is weighed, obtains melt；
C melt that () is obtained to step (b) carries out degasification, impurity removing refining and skims, and continuation 2～5min of standing comes out of the stove and pours
Casting；
D melt that () is obtained to step (c) carries out vibrational casting shaping, obtains wear-resistant aluminum alloy.
The raw material that step (b) fusing step (a) weighs, obtains melt, specially：
Rich Fe aluminiums, pure Al, Al-10Mn, Al-20Si, Al-10Cr, Al-10Sr intermediate alloy are melted together, is melted
Temperature is 740-760 DEG C, adds pure Mg, and continues insulation, after all melting, be warming up to 770-780 DEG C when melting to semisolid,
Stir, be incubated 10～20min, obtain melt.
Step (c) refining, specially：
2# refining agents are added to carry out refining degasification, the chemical composition of 2# refining agents includes Na2SiF6、KCl、Na3AlF6With
C2Cl6。
The rich Fe aluminiums are richness Fe secondary aluminium alloys.
Step (d) is described to carry out casting to the melt that step (c) is obtained, specially：
The melt cast that step (c) is obtained, to the metal type dies for being preheated to 190～210 DEG C, is 200Hz in frequency
The solidification of vibrational casting condition obtains foundry goods.
Compared with prior art, the present invention has advantages below and beneficial effect：
(1) Technology for Heating Processing of wear-resistant aluminum alloy of the invention, being capable of Mg significantly in refining alloy2The form of Si phases, and
Disperse educt Mg in the base2Si ageing strengthening phases.
(2) wear-resistant aluminum alloy of the invention is gone bad long needle-like Fe phase using Mn-Cr elements compoundings so as to tended to particle
Shape form is separated out.
(3) based on Mg2Si phases are refined, Mg2Matrix is mutually strengthened in Si ageing strengthenings, the improvement of Fe phase morphologies in alloy, can be effective
Play reinforcing and the bearing capacity of alloy phase so that alloy rigidity is improved, wearability is obviously improved, tensile strength is improved, especially
Still there is under high temperature excellent strength character
(4) wear-resistant aluminum alloy of the invention, mainly with rich Fe secondary aluminium alloys as raw material, with low cost, moulding process
Simply, it is easy to accomplish industrialized mass production.
Description of the drawings
Fig. 1 is Al-12Si-10Mg-1.3Fe-0.05Sr alloy casting state light micrographs in comparative example 1.
Fig. 2 is the micro- photographs of Al-12Si-10Mg-1.3Fe-0.5Mn-0.5Cr-0.05Sr alloy casting state SEM in comparative example 2
Piece.
Fig. 3 shows for Al-12Si-10Mg-1.3Fe-0.5Mn-0.5Cr-0.05Sr alloys heat treatment state SEM in embodiment 1
Micro- photo.
Specific embodiment
With reference to embodiment, the present invention is described in further detail, but embodiments of the present invention not limited to this.
1 Al-12Si-10Mg-1.3Fe-0.05Sr alloys of comparative example
In comparative example 1, raw material used includes rich Fe secondary aluminium alloys, fine aluminium, closes in the middle of pure Mg, Al-20Si, Al-10Sr
Gold.Forming method is：First by weight percentage：Si：12%, Mg：10%, Fe：1.3%, Sr：0.05%, balance of Al.Wherein
Fe is allocated using rich Fe regeneration A356 aluminium alloys, and not enough Al amounts are allocated using fine aluminium.Melt under the conditions of 750 DEG C
Rich Fe regeneration A356 aluminium, fine aluminium, Al-20Si, Al-10Sr alloy, add in melt when semisolid is melted to again and weigh
Good pure Mg, it is after all melting, artificial to stir so as to which that composition is uniform, is warming up to 775 DEG C, it is incubated 10min.Entered with refining agent
Row refining, stands 5 minutes, keeps 775 DEG C of the temperature of molten metal, the metal type dies for being preheated to 200 DEG C are poured into after skimming,
And foundry goods is obtained for the vibrational casting condition solidification of 200Hz in frequency.
In order to illustrate the tissue and Performance Characteristics of above-mentioned alloy, the present embodiment is prepared for metallographic specimen first and carries out tissue sight
Examine, and using the hardness number of HB-3000 type Brinell hardness tester beta alloys, the vertical electronic universal material examination of AG-X -100KN types
Test machine (load bearing capacity：100KN) beta alloy tensile strength, while being prepared for fretting wear sample, grinds in the friction of M-2000 types
Beta alloy anti-wear performance on testing machine is damaged, wherein specimen size is 10mm × 10mm × 6mm, and load is 200N, and rotating speed is
214r/min, Material Matting are GCr15 bearing steels, and case hardness is HRC 60～62, a diameter of 47mm, and wearing- in period is
20min.And its room temperature and high temperature (300 DEG C) tensile mechanical properties are tested respectively.
Scanning electron microscopy (SEM) photo of the Al-12Si-10Mg-1.3Fe-0.05Sr of as cast condition is as shown in Figure 1.Alloy
In hard Fe phases be in thick gill shape, have the effect of significantly isolating to matrix.The hardness of the alloy be 110HB, wear extent
10.6mg, room temperature tensile intensity 109MPa, Testing Tensile Strength at Elevated Temperature are 60MPa, and during high temperature, strength character is reduced compared with room temperature
45%.
The common as cast conditions of 2 Al-12Si-10Mg-1.3Fe-0.5Mn-0.5Cr-0.05Sr of comparative example
Raw material used by this comparative example include rich Fe aluminium alloys, fine aluminium, pure Mg, Al-20Si, Al-10Cr, Al-10Mn,
Al-10Sr intermediate alloys.Forming method is：First by weight percentage：：Si：12%, Mg：10%, Fe：1.3%, Mn：0.5%,
Cr：0.5%, Sr：0.05%, balance of Al.Wherein Fe is allocated using rich Fe regeneration A356 aluminium alloys, not enough Al amount profits
Allocated with fine aluminium.Melt under the conditions of 750 DEG C richness Fe regenerate A356 aluminium, pure Al, Al-20Si, Al-10Cr, Al-10Mn,
Al-10Sr alloys, in melt add load weighted pure Mg again when semisolid is melted to, after all melting, manually stir
Mix so as to which composition is uniform, is warming up to 775 DEG C, be incubated 10min.With 2# refining agents, (chemical composition includes Na2SiF6、KCl、
Na3AlF6And C2Cl6.) refined, 5 minutes are stood, 775 DEG C of the temperature of molten metal is kept, is poured into after skimming and is preheated to
In 200 DEG C of metal type dies, and foundry goods is obtained for the vibrational casting condition solidification of 200Hz in frequency.
To illustrate the tissue and performance characteristics of alloy obtained by this comparative example, SEM observations, hardness, wearability are carried out to which
And stretching mechanical property testing.Method of testing is consistent with comparative example 1.
In this comparative example, the SEM tissues of alloy are as shown in Fig. 2 alloy is after Mn/Cr/Sr composite inoculatings, as cast condition Al-
Graininess Fe phase in 12Si-10Mg-1.3Fe-0.5Mn-0.5Cr-0.05Sr alloys is dramatically increased, and Fe phases are changed into from long needle-like
With graininess, the effect of isolating of Fe phase matrixes is reduced, so as to can effectively play its reinforcing and abrasion resistant effect.The hardness of the alloy is
112HB, wear extent 6.7mg, room temperature tensile intensity 126MPa, Testing Tensile Strength at Elevated Temperature are 98MPa.Compared with comparative example 1, wearability
Improve, room temperature and Testing Tensile Strength at Elevated Temperature are respectively increased 16% and 40%.During high temperature, strength character is merely reduced compared with room temperature
22%.
1 Al-12Si-10Mg-1.3Fe-0.5Mn-0.5Cr-0.05Sr alloys of embodiment are heat-treated
Raw material used by the present embodiment include rich Fe aluminium alloys, fine aluminium, pure Mg, Al-20Si, Al-10Cr, Al-10Mn,
Al-10Sr intermediate alloys.Forming method is：First by weight percentage：Si：12%, Mg：10%, Fe：1.3%, Mn：0.5%,
Cr：0.5%, Sr：0.05%, balance of Al.Wherein Fe is allocated using rich Fe regeneration A356 aluminium alloys, not enough Al amount profits
Allocated with fine aluminium.Richness Fe regeneration A356 aluminium, fine aluminium, Al-20Si, Al-10Sr alloy are melted under the conditions of 750 DEG C, molten
Change to load weighted pure Mg is added during semisolid again in melt, after all melting, it is artificial to stir so as to which that composition is uniform,
775 DEG C are warming up to, 10min is incubated.With 2# refining agents, (chemical composition includes Na2SiF6、KCl、Na3AlF6And C2Cl6.) carry out essence
Refining, stands 5 minutes, keeps 775 DEG C of the temperature of molten metal, is poured into and is preheated in 200 DEG C of metal type dies after skimming, and
Foundry goods is obtained for the vibrational casting condition solidification of 200Hz in frequency.
Heat treatment process is carried out to gained foundry goods, the basic process of heat treatment is high temperature solid solution, natrual ageing, artificial aging
After come out of the stove the links such as air cooling.Specifically handling process is：Sample is placed in the common chamber type electric resistance furnace that temperature is 560 DEG C carries out solid solution
Process, be transferred quickly to after being incubated 4 hours into the tank quenching that trip temperature is 60 DEG C；By solution hardening sample under room temperature environment
Placement carries out natrual ageing in 18 hours；The incubator that natrual ageing sample is placed in 180 DEG C is carried out into artificial end Ageing Treatment, insulation
Come out of the stove after 7 hours air cooling.
To illustrate the tissue and performance characteristics of alloy obtained by the present embodiment, SEM observations, hardness, wearability are carried out to which
And stretching mechanical property testing.Method of testing is consistent with comparative example 1.
SEM micrographs of the Fig. 3 for alloy in the present embodiment after heat treated.It can be seen that the alloy after heat treatment
Alloy phase particle shape more trend rounding in tissue.Simultaneously through fixation rates, a nanometer chi will be separated out in the base
Very little Mg2Si ageing strengthening phases, so as to further improve the performance of matrix.Compared with comparative example 2, alloy obtained by the embodiment
155HB, wear extent 4.6mg, room temperature tensile intensity 162MPa, Testing Tensile Strength at Elevated Temperature are 118MPa.Compared with comparative example 2, hardness
38% is improved, wearability is further improved, and room temperature and Testing Tensile Strength at Elevated Temperature are respectively increased 32% and 20%.Strength character during high temperature
27% is reduced compared with room temperature.
2 Al-10Si-12Mg-1.3Fe-0.6Mn-0.4Cr-0.05Sr alloys of embodiment are heat-treated
Raw material used by the present embodiment include rich Fe aluminium alloys, fine aluminium, pure Mg, Al-20Si, Al-10Cr, Al-10Mn,
Al-10Sr intermediate alloys.Forming method is：First by weight percentage：Si：10%, Mg：12%, Fe：1.3%, Mn：0.6%,
Cr：0.4%, Sr：0.05%, balance of Al.Wherein Fe is allocated using rich Fe regeneration A356 aluminium alloys, not enough Al amount profits
Allocated with fine aluminium.Richness Fe regeneration A356 aluminium, fine aluminium, Al-20Si, Al-10Sr alloy are melted under the conditions of 750 DEG C, molten
Change to load weighted pure Mg is added during semisolid again in melt, after all melting, it is artificial to stir so as to which that composition is uniform,
770 DEG C are warming up to, 20min is incubated.Refined with refining agent, stood 5 minutes, kept 770 DEG C of the temperature of molten metal, after skimming
It is poured into and is preheated in 190 DEG C of metal type dies, and obtains foundry goods for the vibrational casting condition solidification of 100Hz in frequency.
Heat treatment process is carried out to gained foundry goods, concrete handling process is：Sample is placed in into the common case that temperature is 550 DEG C
Formula resistance furnace carries out solution treatment, is transferred quickly to into the tank quenching that trip temperature is 65 DEG C after being incubated 3 hours；By solution hardening
Sample is placed 10 hours under room temperature environment and carries out natrual ageing；The incubator that natrual ageing sample is placed in 170 DEG C is entered into pedestrian
Work end Ageing Treatment, air cooling of coming out of the stove after being incubated 4 hours.
To illustrate the tissue and performance characteristics of alloy obtained by the present embodiment, SEM observations, hardness, wearability are carried out to which
And stretching mechanical property testing.Method of testing is consistent with comparative example 1.
The tissue morphology of alloy obtained by the present embodiment is similar to the tissue morphology of 1 gained alloy of embodiment.After heat treatment
Alloy phase particle shape more trend rounding in alloy structure.Simultaneously through fixation rates, will separate out in the base and receive
The Mg of meter ruler cun2Si ageing strengthening phases, so as to further improve the performance of matrix.The 144HB of alloy obtained by the embodiment, abrasion
Amount 4.9mg, room temperature tensile intensity 153MPa, Testing Tensile Strength at Elevated Temperature are 114MPa.Gained alloy keeps higher hardness, wearability
And strength character.During high temperature, strength character reduces 25% compared with room temperature.
3 Al-12Si-10Mg-1.6Fe-0.4Mn-0.6Cr-0.1Sr alloy heat treatment states of embodiment
Raw material used by the present embodiment includes rich Fe secondary aluminium alloys, fine aluminium, pure Mg, Al-20Si, Al-10Cr, Al-
10Mn, Al-10Sr intermediate alloy.Forming method is：First by weight percentage：Si：12%, Mg：10%, Fe：1.6%, Mn：
0.6%, Cr：0.4%, Sr：0.1%, balance of Al.Wherein Fe is allocated using rich Fe regeneration A356 aluminium alloys, not enough
Al amounts are allocated using fine aluminium.Richness Fe regeneration A356 aluminium, fine aluminium, Al-20Si, Al-10Sr conjunction are melted under the conditions of 750 DEG C
Gold, adds load weighted pure Mg again in melt when semisolid is melted to, after all melting, artificial to stir so as to into
Divide uniform, be warming up to 780 DEG C, be incubated 20min.Refined with refining agent, stood 5 minutes, kept the temperature 780 of molten metal
DEG C, it is poured into after skimming and is preheated in 210 DEG C of metal type dies, and solidifies for the vibrational casting condition of 200Hz in frequency
Obtain foundry goods.
Heat treatment process is carried out to gained foundry goods, concrete handling process is：Sample is placed in into the common case that temperature is 570 DEG C
Formula resistance furnace carries out solution treatment, is transferred quickly to into the tank quenching that trip temperature is 55 DEG C after being incubated 6 hours；By solution hardening
Sample is placed 24 hours under room temperature environment and carries out natrual ageing；The incubator that natrual ageing sample is placed in 200 DEG C is entered into pedestrian
Work end Ageing Treatment, air cooling of coming out of the stove after being incubated 10 hours.
To illustrate the tissue and performance characteristics of alloy obtained by the present embodiment, SEM observations, hardness, wearability are carried out to which
And stretching mechanical property testing.Method of testing is consistent with comparative example 1.
The tissue morphology of alloy obtained by the present embodiment is similar to the tissue morphology of 1 gained alloy of embodiment.After heat treatment
Alloy phase particle shape more trend rounding in alloy structure.Simultaneously through fixation rates, will separate out in the base and receive
The Mg of meter ruler cun2Si ageing strengthening phases, so as to further improve the performance of matrix.The 146HB of alloy obtained by the embodiment, abrasion
Amount 4.7mg, room temperature tensile intensity 154MPa, Testing Tensile Strength at Elevated Temperature are 116MPa.Gained alloy keeps higher hardness, wearability
And strength character.During high temperature, strength character reduces 25% compared with room temperature.
4 Al-12Si-12Mg-0.8Fe-0.5Mn-0.5Cr-0.1Sr alloy heat treatment states of embodiment
Raw material used by the present embodiment includes rich Fe secondary aluminium alloys, fine aluminium, pure Mg, Al-20Si, Al-10Cr, Al-
10Mn, Al-10Sr intermediate alloy.Forming method is：First by weight percentage：Si：12%, Mg：12%, Fe：0.8%, Mn：
0.5%, Cr：0.5%, Sr：0.1%, balance of Al.Balance of Al.Wherein Fe is adjusted using rich Fe regeneration A356 aluminium alloys
Match somebody with somebody, not enough Al amounts are allocated using fine aluminium.Melt under the conditions of 750 DEG C richness Fe regenerate A356 aluminium, fine aluminium, Al-20Si,
Al-10Sr alloys, add load weighted pure Mg again in melt when semisolid is melted to.After all melting, manually stir
Mix so as to which composition is uniform, is warming up to 780 DEG C, be incubated 20min.Refined with refining agent, stood 5 minutes, kept molten metal
780 DEG C of temperature, is poured into after skimming and is preheated in 210 DEG C of metal type dies, and in the vibrational casting bar that frequency is 200Hz
Part solidification obtains foundry goods.
To illustrate the tissue and performance characteristics of alloy obtained by the present embodiment, SEM observations, hardness, wearability are carried out to which
And stretching mechanical property testing.Method of testing is consistent with comparative example 1.
The tissue morphology of alloy obtained by the present embodiment is similar to the tissue morphology of 1 gained alloy of embodiment.After heat treatment
Alloy phase particle shape more trend rounding in alloy structure.Simultaneously through fixation rates, will separate out in the base and receive
The Mg of meter ruler cun2Si ageing strengthening phases, so as to further improve the performance of matrix.The 153HB of alloy obtained by the embodiment, abrasion
Amount 4.7mg, room temperature tensile intensity 160MPa, Testing Tensile Strength at Elevated Temperature are 114MPa.Gained alloy keeps higher hardness, wearability
And strength character.During high temperature, strength character reduces 29% compared with room temperature.
For ease of the performance data of alloy handled by direct comparative example, it is strong that table 1 gives corresponding hardness, tension
Degree, wear extent.Knowable to each item data of table 1, composition contains by weight percentage：10～12%Si, 8～12%Mg, 1.2～
1.6%Fe, 0.3～0.7%%Mn, 0.3～0.7%Cr, 0.03～0.07%Sr, the wear-resistant aluminum alloy of balance of aluminium entered
550～570 DEG C of 3～6h of high temperature solid solution, then insert the tank that temperature is 60 DEG C and quench, room temperature natrual ageing 10～24 hours,
170～200 DEG C are incubated artificial aging 4～10 hours, and after air cooling of coming out of the stove, hardness and wearability are significantly improved, and mechanical property changes
It is kind, it is particularly that its mechanical behavior under high temperature is excellent, compared with room temperature strength, during high temperature, strength character fall is very low.
The performance of each alloy in 1 comparative example of table and embodiment
Above-described embodiment is the present invention preferably embodiment, but embodiments of the present invention not by the embodiment
Limit, other any Spirit Essences without departing from the present invention and the change, modification, replacement made under principle, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (6)
1. a kind of heat treatment method of wear-resistant aluminum alloy, it is characterised in that the composition of the wear-resistant aluminum alloy is by weight percentage
Contain：
The heat treatment method is comprised the following steps：
(1) wear-resistant aluminum alloy is placed in into 550～570 DEG C of 3～6h of high temperature solid solution, then inserts the tank that temperature is 55～65 DEG C and quench
Fire；
(2) wear-resistant aluminum alloy after step (1) process is placed into 10～24 hours at room temperature；
(3) wear-resistant aluminum alloy after step (1) process is placed at a temperature of 170～200 DEG C and is incubated 4～10 hours, finally gone out
Stove air cooling.
2. the heat treatment method of wear-resistant aluminum alloy according to claim 1, it is characterised in that the wear-resistant aluminum alloy by with
It is prepared by lower section method：
A () with rich Fe aluminiums, fine aluminium, pure Mg, Al-10Mn intermediate alloy, Al-10Cr intermediate alloys, Al-10Sr intermediate alloys is
Raw material, weighs raw material by composition；
B raw material that () fusing step (a) is weighed, obtains melt；
C melt that () is obtained to step (b) carries out degasification, impurity removing refining and skims, and continues to stand 2～5min tapping castings；
D melt that () is obtained to step (c) carries out vibrational casting shaping, obtains wear-resistant aluminum alloy.
3. the heat treatment method of wear-resistant aluminum alloy according to claim 2, it is characterised in that step (b) the fusing step
Suddenly the raw material that (a) is weighed, obtains melt, specially：
Rich Fe aluminiums, fine aluminium, Al-10Mn, Al-20Si, Al-10Cr, Al-10Sr intermediate alloy are melted together, fusion temperature
For 740～760 DEG C, pure Mg is added when melting to semisolid, and continues insulation, after all melting, be warming up to 770～780 DEG C, stir
Mix uniform, be incubated 10～20min, obtain melt.
4. the heat treatment method of wear-resistant aluminum alloy according to claim 2, it is characterised in that step (c) refining, tool
Body is：
2# refining agents are added to carry out refining degasification, the chemical composition of 2# refining agents includes Na2SiF6、KCl、Na3AlF6And C2Cl6。
5. the heat treatment method of wear-resistant aluminum alloy according to claim 2, it is characterised in that the rich Fe aluminiums are richness Fe
Secondary aluminium alloy.
6. the heat treatment method of wear-resistant aluminum alloy according to claim 2, it is characterised in that step (d) is described to step
C melt that () obtains carries out vibrational casting shaping, specially：
The melt cast that step (c) is obtained to the metal type dies for being preheated to 190～210 DEG C, frequency be 100～
The vibrational casting condition solidification of 200Hz obtains foundry goods.
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