CN106702293A - Heat treatment process of high-strength wear-resistant Al-Si-Cu alloy - Google Patents
Heat treatment process of high-strength wear-resistant Al-Si-Cu alloy Download PDFInfo
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- CN106702293A CN106702293A CN201710112856.1A CN201710112856A CN106702293A CN 106702293 A CN106702293 A CN 106702293A CN 201710112856 A CN201710112856 A CN 201710112856A CN 106702293 A CN106702293 A CN 106702293A
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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
- 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
- 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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Abstract
The invention belongs to the technical field of nonferrous material manufacturing, and particularly relates to a heat treatment process of high-strength wear-resistant Al-Si-Cu alloy. Through introducing intermediate cold deformation and warm water quenching, and through primary high-temperature processing and two times of annealing processing, a second phase in the alloy is uniformly dispersed and precipitated so as to fully play a role in reinforcement, the quench-cracking tendency of the alloy is effectively inhibited, and the alloy keeps better toughness. The Al-Si-Cu alloy extruded product obtained through treating by utilizing the heat treatment process provided by the invention has the room temperature tensile strength achieving 501MPa or above, the elongation achieving not less than 5 percent, and the average crystallite size achieving 0.020 to 0.035mm, and has an excellent wear-resisting property. Meanwhile, the heat treatment process provided by the invention can be applied in silicon aluminum alloy with the total content of alloy elements achieving not less than 18 weight percent.
Description
Technical field
The invention belongs to nonferrous materials manufacturing technology field, and in particular to a kind of high-strength wearable Al-Si-Cu alloys
Technology for Heating Processing.
Background technology
Siliceous duralumin, hard alumin ium alloy has high intensity, light weight and good wear performance, is widely used in engine piston, multiclass empty
Adjust the wear parts such as compressor blade and impeller.Patent of invention [ZL201210313325.6] disclose a kind of similar alloy into
Point.But such aluminium alloy is up to 15~25% because of alloying element content, and hardness and intensity are high, fragility is big, is difficult to realize its plasticity
Processing, generally prepares shaping using powder metallurgy process, and the application of its each side is restricted significantly.The solution that current Some Enterprises are used
Certainly method is suitably to reduce alloy content, to improve alloy plasticity；And casting method base is used, obtain each by plastic working
Plant the material or product of specification.In this case, it is critical process to be heat-treated to, because only that by heat treatment or deformation heat
Treatment, can just make alloy obtain expected high-strength wearable performance.Patent of invention [ZL201210313190.3] discloses a species
Like the production technology of alloy, alloy is set to obtain higher force performance using two-stage time effect heat treatment.But, because such alloy into
Divide complexity, various phase transformations may occur in heat treatment process, form various second phases, including various hardening constituents and hard crisp impurity
Phase, so the organization and performance control difficulty of alloy is big, common heat treatment system is difficult to make the potentiality of alloy to be not fully exerted,
It is often the case that improve the hardness and intensity of alloy, as a result its plasticity is remarkably decreased with toughness, and vice versa.Intensity and hardness
It is not high to drop low-alloyed anti-wear performance, and plasticity is too poor influence following process and will use.Therefore, for the modeling of such alloy
Property converted products, how by Technology for Heating Processing control, reach good mechanical property and anti-wear performance matching, be always
Still unsolved technical barrier in industry.
The content of the invention
The problem that the present invention exists for above-mentioned prior art, there is provided it is a kind of it is dramatically different with prior art, comprising deformation
High-strength wearable Al-Si-Cu alloys Technology for Heating Processing.
A kind of Technology for Heating Processing of high-strength wearable Al-Si-Cu alloys of the present invention, comprises the steps：
Step one
High-temperature heat treatment is carried out to high-strength wearable Al-Si-Cu alloys at 525~580 DEG C, warm water is carried out after high-temperature heat treatment
Quenching, obtains the alloy after high-temperature process；The temperature of the warm water is 40~80 DEG C；
Step 2
Cold deformation is carried out to the alloy after step one gained high-temperature process；Cold deformation rate is controlled 5~20%, obtains cold change
Alloy after shape；
Step 3
Twice annealing process is carried out to the alloy after step 2 gained cold deformation, finished product is obtained；In twice annealing process, the
The temperature for once making annealing treatment is 280~320 DEG C, the time is 30~60 minutes, is moved back for the second time immediately after annealing for the first time
Treatment is returned, the temperature for making annealing treatment for the second time is 100~140 DEG C, the time is 480~600 minutes.
Preferably, a kind of Technology for Heating Processing of high-strength wearable Al-Si-Cu alloys of the invention, described in step one
High-strength wearable Al-Si-Cu alloys are through hot-pressed alloy semi-products.
Preferably, the Technology for Heating Processing of a kind of high-strength wearable Al-Si-Cu alloys of the invention, in step one,
525~580 DEG C carry out high-temperature heat treatment 120~240 minutes to high-strength wearable Al-Si-Cu alloys, exist immediately after high-temperature heat treatment
40~80 DEG C of warm quenching-in waters.
Preferably, the Technology for Heating Processing of a kind of high-strength wearable Al-Si-Cu alloys of the invention, at the warm high
The temperature conditionss of reason are 540~560 DEG C, soaking time 150~210 minutes；After high-temperature heat treatment immediately in 50~60 DEG C of warm water
Quenching.
Preferably, the Technology for Heating Processing of a kind of high-strength wearable Al-Si-Cu alloys of the invention, described in step 2
Cold deformation includes cold rolling or cold drawn.
Preferably, the Technology for Heating Processing of a kind of high-strength wearable Al-Si-Cu alloys of the invention, in step 2, cold change
Form quotient is controlled 8~15%.
Preferably, the Technology for Heating Processing of a kind of high-strength wearable Al-Si-Cu alloys of the invention, in step 3, once
The temperature of annealing is 280~300 DEG C, and soaking time is 30~40 minutes.
Preferably, the Technology for Heating Processing of a kind of high-strength wearable Al-Si-Cu alloys of the invention, in step 3, second
The temperature of secondary annealing is 100~120 DEG C, soaking time is 420~510 minutes.
Preferably, the Technology for Heating Processing of a kind of high-strength wearable Al-Si-Cu alloys of the invention, in step 3,
Transferring the material to double annealing stove after the completion of once annealing carries out second annealing, and transfer time is not more than 10 seconds.
Preferably, a kind of Technology for Heating Processing of high-strength wearable Al-Si-Cu alloys of the invention, the high-strength wearable
In Al-Si-Cu alloys, alloying element total content is more than or equal to 18wt%.
Preferably, a kind of Technology for Heating Processing of high-strength wearable Al-Si-Cu alloys of the invention is particularly well-suited to contain
Si10~15wt%, preferably 12.5~15wt%, Cu3.0~5.0wt%, preferably 4.5~5.0wt%, Mg0.5~
1.5wt%, the Methods for Aluminum Alloy Extruding Products for being preferably 1.0~1.5wt%.
Know-why of the invention is summarized as follows：The high-strength wearable Al-Si-Cu alloys, containing various alloying elements, can
Various hardening constituents are formed, can separate out various hardening constituents energy even dispersion by heat treatment, significantly improve the mechanical property of alloy
Energy and wearability.First step high-temperature heat treatment, is, for crystal grain thinning, and alloying element is fully solid-solution in aluminum substrate, is quenched
Unstable supersaturated solid solution is formed afterwards；The series alloy fragility is larger, using warm water quench, be in order to prevent semi-products because
Quenching stress is excessive and ftractures；Second step carries out cold rolling at room temperature or cold drawing, its first purpose be smoothing aligning, purpose it
Two is that equally distributed stress field is formed in semi-products, to promote the second phase Quick uniform shape in follow-up heat treatment process
Core and disperse educt；3rd step first carries out annealing heat-treats at relatively high temperatures, is and the forming core in order that the second mutually quick forming core
Rate is high；Short-cycle annealing is to prevent the rapid agglomeration of the second phase of forming core at high temperature；Thereafter fast transfer is to low temperature oven
Low temperature prolonged anneal is carried out, is exactly in order that the precipitation of the second phase even dispersion, gives full play to its invigoration effect.
Technical advantage of the invention is summarized as follows：A kind of heat treatment of high-strength wearable Al-Si-Cu alloys that the present invention is provided
Technique, by introducing in the middle of cold deformation and warm water quench, not only make in alloy second to be mutually able to even dispersion and separate out, fully hair
Its invigoration effect is waved, and effectively inhibits hardening break to be inclined to, and alloy is kept preferable toughness.And heat treatment of the invention
Technological operation is easy, and increased cost is little compared with common simple thermal treatment technique.Using gained Al- after present invention treatment
Si-Cu alloy extrusion semi-products, room temperature tensile intensity up to 501MPa and more than, elongation is up to more than 5%, average crystal grain chi
It is very little reachable 20~35 μm, excellent wear-resisting property；The intensity of scheme products obtained therefrom, processability, wearability are more as designed by the present invention
Can be taken into account well.And the alloy product obtained using normative heat treatment, tensile strength is only 450~500MPa, is stretched
Up to 3~6%, average grain size is up to 50~120 μm, and anti-wear performance is general for rate long, while its intensity, processability and wear-resisting
Property is difficult to take into account.
Specific embodiment
By the following examples, technical scheme is further described in detail.It should be noted that following real
Apply example to be only used for explaining of the invention, and be not construed as the limitation of the scope to claim of the invention.
Embodiment
Through dispensing (Al-12.5%Si-4.5%Cu-1.2%Mg-0.7%Zn-0.3%Ni-0.03%La-0.03%
Ce), resistance furnace melting, vertical semi-continuous casting, common horizontal hot extrusion, a kind of aluminium alloy flat bar for obtaining, then enter to it
Row deformation and heat treatment.Technology for Heating Processing and alloy product tissue, performance parameter are shown in Table 1.In an embodiment of the present invention,
12.5%Si represents that the weight/mass percentage composition of Si in alloy is the weight/mass percentage composition that 12.5%, 4.5%Cu represents Cu in alloy
For 4.5%, 1.2%Mg represents that the weight/mass percentage composition of Mg in alloy is the quality hundred that 1.2%, 0.7%Zn represents Zn in alloy
Point content is that 0.7%, 0.3%Ni represents that the weight/mass percentage composition of Ni in alloy is that 0.3%, 0.03%La represents La in alloy
Weight/mass percentage composition is that 0.03%, 0.03%Ce represents that the weight/mass percentage composition of Ce in alloy is 0.03%, balance of Al.
From table 1, embodiment 1~6 carries out deformation and heat treatment according to technique of the invention, obtains good mechanics
Performance and anti-wear performance, and comparative example 1~4, because without being heat-treated using technique of the invention, so product wearability drops
Low or processing characteristics is poor, or even quenching is directly ftractureed.The above results indicate effectiveness of the invention.
The technological parameter and product properties of each embodiment of table 1 and comparative example
In embodiment and comparative example, it is necessary to carry out it is twice annealed, by first time anneal after be transferred in 10 seconds
In second annealing device therefor and carry out the system of second annealing and carry out.
Claims (9)
1. a kind of Technology for Heating Processing of high-strength wearable Al-Si-Cu alloys, it is characterised in that comprise the steps：
Step one
High-temperature heat treatment is carried out to high-strength wearable Al-Si-Cu alloys at 525~580 DEG C, warm water is carried out after high-temperature heat treatment and is quenched
Fire, obtains the alloy after high-temperature process；The temperature of the warm water is 40~80 DEG C；
Step 2
Cold deformation is carried out to the alloy after step one gained high-temperature process；Cold deformation rate is controlled 5~20%, after obtaining cold deformation
Alloy；
Step 3
Twice annealing process is carried out to the alloy after step 2 gained cold deformation, finished product is obtained；In twice annealing process, for the first time
The temperature of annealing is 280~320 DEG C, the time is 30~60 minutes, and place is return for the second time immediately after annealing for the first time
Reason, the temperature for making annealing treatment for the second time is 100~140 DEG C, the time is 480~600 minutes.
2. the Technology for Heating Processing of a kind of high-strength wearable Al-Si-Cu alloys according to claim 1, it is characterised in that：Step
In one, the high-strength wearable Al-Si-Cu alloys are through hot-pressed alloy semi-products.
3. the Technology for Heating Processing of a kind of high-strength wearable Al-Si-Cu alloys according to claim 1, it is characterised in that：Step
In one, high-temperature heat treatment is carried out 120~240 minutes to high-strength wearable Al-Si-Cu alloys at 525~580 DEG C, high-temperature heat treatment
Afterwards immediately in 40~80 DEG C of warm quenching-in waters.
4. the Technology for Heating Processing of a kind of high-strength wearable Al-Si-Cu alloys according to claim 3, it is characterised in that：It is described
The temperature conditionss of high-temperature heat treatment are 540~560 DEG C, soaking time 150~210 minutes；Immediately 50~60 after high-temperature heat treatment
DEG C warm quenching-in water.
5. the Technology for Heating Processing of a kind of high-strength wearable Al-Si-Cu alloys according to claim 1, it is characterised in that：Step
Cold deformation described in two includes cold rolling or cold drawn.
6. the Technology for Heating Processing of a kind of high-strength wearable Al-Si-Cu alloys according to claim 1, it is characterised in that：Step
In two, cold deformation rate is controlled 8~15%.
7. the Technology for Heating Processing of a kind of high-strength wearable Al-Si-Cu alloys according to claim 1, it is characterised in that：Step
In three, the temperature once annealed is 280~300 DEG C, and soaking time is 30~40 minutes.
8. the Technology for Heating Processing of a kind of high-strength wearable Al-Si-Cu alloys according to claim 1, it is characterised in that：Step
In three, the temperature annealed for the second time is 100~120 DEG C, soaking time is 420~510 minutes.
9. the Technology for Heating Processing of a kind of high-strength wearable Al-Si-Cu alloys according to claim 1, it is characterised in that：Step
In three, transfer the material to double annealing stove and carry out second annealing after the completion of first time anneals, transfer time is not more than 10
Second.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710112856.1A CN106702293B (en) | 2017-02-28 | 2017-02-28 | A kind of Technology for Heating Processing of high-strength wearable Al Si Cu alloys |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710112856.1A CN106702293B (en) | 2017-02-28 | 2017-02-28 | A kind of Technology for Heating Processing of high-strength wearable Al Si Cu alloys |
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| CN106702293A true CN106702293A (en) | 2017-05-24 |
| CN106702293B CN106702293B (en) | 2018-01-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108034873A (en) * | 2017-11-20 | 2018-05-15 | 湖州亨达铝业有限公司 | A kind of Al-6%Cu alloys of low hot cracking tendency and preparation method thereof |
| CN108859501A (en) * | 2018-06-07 | 2018-11-23 | 慈溪市绿茂丰烟具有限公司 | The production method of liquid-leakage preventing nib |
Citations (2)
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| CN103131905A (en) * | 2013-03-06 | 2013-06-05 | 苏州有色金属研究院有限公司 | Aluminum alloy for automotive body and heat treatment method thereof |
| CN104372210A (en) * | 2014-12-01 | 2015-02-25 | 北京科技大学 | Automotive low-cost high-formability aluminum alloy material and preparation method thereof |
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2017
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103131905A (en) * | 2013-03-06 | 2013-06-05 | 苏州有色金属研究院有限公司 | Aluminum alloy for automotive body and heat treatment method thereof |
| CN104372210A (en) * | 2014-12-01 | 2015-02-25 | 北京科技大学 | Automotive low-cost high-formability aluminum alloy material and preparation method thereof |
Non-Patent Citations (3)
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|---|
| 林高用等: "变形Al-Si-Cu-Mg合金热处理强化及其组织特性", 《中国有色金属学报》 * |
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| 王国璋等: "《压力容器设计实用手册》", 31 May 2013, 中国石化出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108034873A (en) * | 2017-11-20 | 2018-05-15 | 湖州亨达铝业有限公司 | A kind of Al-6%Cu alloys of low hot cracking tendency and preparation method thereof |
| CN108859501A (en) * | 2018-06-07 | 2018-11-23 | 慈溪市绿茂丰烟具有限公司 | The production method of liquid-leakage preventing nib |
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| CN106702293B (en) | 2018-01-19 |
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