CN104342610A - Heat treatment process for improving plastic hysteresis energy consumption of copper-based memory alloys under hot and cold cycles - Google Patents
Heat treatment process for improving plastic hysteresis energy consumption of copper-based memory alloys under hot and cold cycles Download PDFInfo
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- CN104342610A CN104342610A CN201310334125.3A CN201310334125A CN104342610A CN 104342610 A CN104342610 A CN 104342610A CN 201310334125 A CN201310334125 A CN 201310334125A CN 104342610 A CN104342610 A CN 104342610A
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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
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/04—Alloys based on copper with zinc 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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- 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
- C22F1/006—Resulting in heat recoverable alloys with a memory effect
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Abstract
The invention discloses a heat treatment process for improving plastic hysteresis energy consumption of copper-based memory alloys under hot and cold cycles, and belongs to the field of copper memory alloys. The heat treatment process is characterized by obtaining three different components: 25.6% of Zn, 13.8% of Al, and the balance of Cu; or 23.5% of Zn, 3.5% of Al, and the balance of Cu; or 23.2% of Zn, 13.4% of Al, and the balance of Cu; copper-zinc-aluminum alloys are annealed, are heated up to 830-850 DEG C for keeping 24 hours, and are cooled along with a furnace; 2-3 mm of dezincification layers and casting defects on the surfaces are cut off; and then, the heat treatment of water quenching and ageing is adopted, that is, when the temperature of 830-850 DEG C is kept for 0.5 h, the alloys are quenched in room-temperature water, are aged for 2 hours in a heat preserving furnace of 150 DEG C, and are taken out for air cooling to the room temperature. The copper-zinc-aluminum memory alloys with excellent hysteresis energy consumption performance can be obtained through the method.
Description
Technical field
The invention belongs to field of memory alloy, refer in particular to the thermal treatment process improving copper-based memory alloy plasticity hysteretic energy under cold cycling.
Background technology
Advantages such as mild steel is strong owing to having deformability, cheap and by the preferred material as energy consumer, but with the energy consumer that mild steel makes, there is initial stiffness and yielding stress low, the shortcomings such as not reproducible use.And memorial alloy significant advantage is as follows in contrast: the energy consumption and distortion of (1) memorial alloy energy consumer is occurred by material inside organization change (martensitic transformation), alloy material inside can not produce a lot of defect, fatigue property is good, its long service life, can Reusability; (2) there is the advantages such as good adaptive ability.And at present for the memorial alloy mainly NiTi alloy of structural vibration control, but due to the price (being about 10 times of Cu base memorial alloy) of NiTi alloy costliness and the production technique of complexity, seriously limit the widespread use of alloy in this and popularization.
The advantages such as it is wide that Cu base memorial alloy has phase transformation adjustable temps, and good processability, raw material sources are extensive, with low cost, have very tempting application prospect in structure control field.Its path of compression and decompression in deformation process does not overlap and forms a closed hysteretic loop, thus lot of energy, the size of alloy hysteretic loop is not only relevant with the kind of material, and relevant with factors such as thermal treatment process (comprising solid solubility temperature, quenching mode, speed of cooling) and texturizing conditions (deflection, texturing temperature, Deformation velocity).For the alloy that composition is certain, thermal treatment can change its tissue, comprises the phase composite of alloy, the composition of each phase, state, grain size and distribution, thus the change affecting alloy property.
The present invention proposes the thermal treatment process improving copper-based memory alloy plasticity hysteretic energy under cold cycling.
Summary of the invention
The present invention proposes the thermal treatment process improving copper-based memory alloy plasticity hysteretic energy under cold cycling, it is characterized by: by acquisition three kinds of heterogeneities (Zn25.6%, Al3.8%, surplus Cu; Zn23.5%, Al3.5%, surplus Cu; Zn23.2%, Al3.4, surplus Cu; ) cu-zn-al alloy carry out anneal, furnace cooling after being incubated 24 hours at 830-850 DEG C, cut dezincify layer and the casting flaw of the 2 ~ 3mm removing surface, then shrend is taked to add the thermal treatment of timeliness, namely 830-850 DEG C of insulation is quenched in room temperature water for 0.5 hour, then ageing treatment took out air cooling to room temperature after 2 hours in the holding furnace of 150 DEG C.The CuZnAl shape memory alloy of hysteretic energy excellent performance can be obtained by above method.
Cold cycling training is the shape memory effect utilizing CuZnAl shape memory alloy, makes it restore to the original state after distortion by heating.Sample is of a size of: 250mm × 15mm × 0.2mm, and effective tensile elongation of sample is 210mm.The CuZnAl alloy different to martensite start temperature (Ms) carries out cold cycling training, and the process of a heating-cooling-reply repeats this process repeatedly for once to train, the stress-strain(ed) curve after record respective cycle frequency of training.WDW-200 type microcomputer controlled electro minor universal testing machine is utilized to test the hysteresis loop of memorial alloy.Samples all before testing all carries out the preliminary draft that deflection is 1%, and test force maximum in process of the test is 800N.Alloy hysteresis loop surround area size reflect the quality of alloy Hysteresis Behavior, thus the size of reflect alloy energy-dissipating property.
accompanying drawing explanation
The hysteresis loop of memorial alloy after cold cycling 2 training of Fig. 1 Ms=50 DEG C;
The hysteresis loop of memorial alloy after cold cycling 6 training of Fig. 2 Ms=50 DEG C;
The hysteresis loop of memorial alloy after cold cycling 10 training of Fig. 3 Ms=50 DEG C;
The hysteresis loop of memorial alloy after cold cycling 2 training of Fig. 4 Ms=66 DEG C;
The hysteresis loop of memorial alloy after cold cycling 6 training of Fig. 5 Ms=66 DEG C;
The hysteresis loop of memorial alloy after cold cycling 10 training of Fig. 6 Ms=66 DEG C;
The hysteresis loop of memorial alloy after cold cycling 2 training of Fig. 7 Ms=130 DEG C;
The hysteresis loop of memorial alloy after cold cycling 6 training of Fig. 8 Ms=130 DEG C;
The hysteresis loop of memorial alloy after cold cycling 10 training of Fig. 9 Ms=130 DEG C.
Embodiment
embodiment 1
Transformation temperature testing authentication is carried out to CuZnAl shape memory alloy, selects the memorial alloy of Ms=50 DEG C (Zn25.6%, Al3.8%, surplus Cu) be test materials and carry out appeal thermal treatment process.Sample is of a size of: 250mm × 15mm × 0.2mm, and effective tensile elongation of sample is 210mm.Cold cycling is trained: the process of a heating-cooling-reply repeats this process repeatedly for once to train, the stress-strain(ed) curve after record respective cycle frequency of training.WDW-200 type microcomputer controlled electro minor universal testing machine is utilized to test the hysteresis loop of memorial alloy.Samples all before testing all carries out the preliminary draft that deflection is 1%, and test force maximum in process of the test is 800N.Alloy hysteresis loop surround area size reflect the quality of alloy Hysteresis Behavior, thus the size of reflect alloy energy-dissipating property, as shown in Figure 1.
embodiment 2
Transformation temperature testing authentication is carried out to CuZnAl shape memory alloy, selects the memorial alloy of Ms=66 DEG C (Zn23.5%, Al3.5%, surplus Cu) be test materials and carry out appeal thermal treatment process.Sample is of a size of: 250mm × 15mm × 0.2mm, and effective tensile elongation of sample is 210mm.Cold cycling is trained: the process of a heating-cooling-reply repeats this process repeatedly for once to train, the stress-strain(ed) curve after record respective cycle frequency of training.WDW-200 type microcomputer controlled electro minor universal testing machine is utilized to test the hysteresis loop of memorial alloy.Samples all before testing all carries out the preliminary draft that deflection is 1%, and test force maximum in process of the test is 800N.Alloy hysteresis loop surround area size reflect the quality of alloy Hysteresis Behavior, thus the size of reflect alloy energy-dissipating property, as shown in Figure 2.
embodiment 3
Transformation temperature testing authentication is carried out to CuZnAl shape memory alloy, selects Ms=130 DEG C of (Zn23.2%, Al3.4, surplus Cu; ) memorial alloy be test materials and carry out appeal thermal treatment process.Sample is of a size of: 250mm × 15mm × 0.2mm, and effective tensile elongation of sample is 210mm.Cold cycling is trained: the process of a heating-cooling-reply repeats this process repeatedly for once to train, the stress-strain(ed) curve after record respective cycle frequency of training.WDW-200 type microcomputer controlled electro minor universal testing machine is utilized to test the hysteresis loop of memorial alloy.Samples all before testing all carries out the preliminary draft that deflection is 1%, and test force maximum in process of the test is 800N.Alloy hysteresis loop surround area size reflect the quality of alloy Hysteresis Behavior, thus the size of reflect alloy energy-dissipating property, as shown in Figure 3.
Claims (2)
1. improve the thermal treatment process of copper-based memory alloy plasticity hysteretic energy under cold cycling, it is characterized by: by acquisition three kinds of heterogeneities, Zn25.6%, Al3.8%, surplus Cu; Zn23.5%, Al3.5%, surplus Cu; Zn23.2%, Al3.4, surplus Cu; Cu-zn-al alloy carries out anneal, furnace cooling after being incubated 24 hours at 830-850 DEG C, cut dezincify layer and the casting flaw of the 2 ~ 3mm removing surface, then shrend is taked to add the thermal treatment of timeliness, namely 830-850 DEG C of insulation is quenched in room temperature water for 0.5 hour, then ageing treatment took out air cooling to room temperature after 2 hours in the holding furnace of 150 DEG C; The CuZnAl shape memory alloy of hysteretic energy excellent performance can be obtained by above method; Cold cycling training is the shape memory effect utilizing copper-zinc-aluminum shape memory alloy, makes it restore to the original state after distortion by heating; Sample is of a size of: 250mm × 15mm × 0.2mm, and effective tensile elongation of sample is 210mm; The CuZnAl alloy different to martensite start temperature Ms carries out cold cycling training, and the process of a heating-cooling-reply repeats this process repeatedly for once to train, the stress-strain(ed) curve after record respective cycle frequency of training; WDW-200 type microcomputer controlled electro minor universal testing machine is utilized to test the hysteresis loop of memorial alloy; Samples all before testing all carries out the preliminary draft that deflection is 1%, and test force maximum in process of the test is 800N; Alloy hysteresis loop surround area size reflect the quality of alloy Hysteresis Behavior, thus the size of reflect alloy energy-dissipating property.
2. improve the thermal treatment process of copper-based memory alloy plasticity hysteretic energy under cold cycling according to claim 1, after thermal treatment, the hysteretic energy performance of copper-zinc-aluminum shape memory alloy after cold cycling training of Ms=50 DEG C is best.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105908013A (en) * | 2016-05-17 | 2016-08-31 | 哈尔滨工业大学 | Method for manufacturing CuZnAl or CuZn alloy continuous fiber through cold drawing |
Citations (3)
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| CN102828062A (en) * | 2012-09-18 | 2012-12-19 | 镇江忆诺唯记忆合金有限公司 | Method for controlling two-way memory recovery rate of low-aluminum high-manganese CuAlMn memory alloy |
| CN102839293A (en) * | 2012-09-18 | 2012-12-26 | 镇江忆诺唯记忆合金有限公司 | Method for controlling two-way memory recovery rate of CuAlMn memory alloy with high aluminum and low manganese contents |
| CN102888526A (en) * | 2012-09-17 | 2013-01-23 | 镇江忆诺唯记忆合金有限公司 | High-alumina low-manganese CuAlMn low-temperature memory alloy spring |
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Patent Citations (3)
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| CN102888526A (en) * | 2012-09-17 | 2013-01-23 | 镇江忆诺唯记忆合金有限公司 | High-alumina low-manganese CuAlMn low-temperature memory alloy spring |
| CN102828062A (en) * | 2012-09-18 | 2012-12-19 | 镇江忆诺唯记忆合金有限公司 | Method for controlling two-way memory recovery rate of low-aluminum high-manganese CuAlMn memory alloy |
| CN102839293A (en) * | 2012-09-18 | 2012-12-26 | 镇江忆诺唯记忆合金有限公司 | Method for controlling two-way memory recovery rate of CuAlMn memory alloy with high aluminum and low manganese contents |
Non-Patent Citations (2)
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| 史强军，王晓东，司乃潮: "热处理工艺对CuZnAl形状记忆合金塑性滞回耗能的影响", 《兵器材料科学与工程》 * |
| 徐桂芳， 司乃潮，李玉祥: "热处理工艺对铜锌铝形状记忆合金组织与滚动磨损性能的影响", 《兵器材料科学与工程》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105908013A (en) * | 2016-05-17 | 2016-08-31 | 哈尔滨工业大学 | Method for manufacturing CuZnAl or CuZn alloy continuous fiber through cold drawing |
| CN105908013B (en) * | 2016-05-17 | 2017-07-28 | 哈尔滨工业大学 | A kind of method that cold drawing prepares CuZnAl or CuZn alloy continuous fibers |
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Application publication date: 20150211 |