CN102732744A - Method for improving memory performance of CuZnAl memory alloy - Google Patents
Method for improving memory performance of CuZnAl memory alloy Download PDFInfo
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- CN102732744A CN102732744A CN2012102477270A CN201210247727A CN102732744A CN 102732744 A CN102732744 A CN 102732744A CN 2012102477270 A CN2012102477270 A CN 2012102477270A CN 201210247727 A CN201210247727 A CN 201210247727A CN 102732744 A CN102732744 A CN 102732744A
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Abstract
The invention discloses a method for improving memory performance of a CuZnAl memory alloy and belongs to the technical field of CuZnAl memory alloys. The method is characterized by comprising the steps of: preparing the CuZnAl memory alloy, wherein the CuZnAl memory alloy comprises the following chemical ingredients in percentage by weight: 22-26% of Zn, 13-4% of Al, and the balance of Cu, smelting the CuZnAl memory alloy through a medium frequency electric induction furnace, adding 0.2-0.6% by weight of special composite rear earth alterant after the alloy is smelted, pouring the alloy into a cast ingot with diameter of phi 80*150mm when the smelting temperature reaches 1300-1350 DEG C, and then, performing annealing treatment, thermal treatment quenching, three-level aging treatment and circular training treatment.
Description
Technical field
The invention belongs to CuZnAl memorial alloy technical field, refer in particular to a kind of method of the CuZnAl of raising memorial alloy memory performance.
Background technology
With low cost, the good processability of CuZnAl memorial alloy obtains extensive studies and development in recent years, and is thick at basic solution CuZnAl memorial alloy crystal grain, and behind the martensite stabilization, this alloy progresses into actual applying the stage.As the temperature-sensitive and driving dual-use function that utilize the CuZnAl memorial alloy to be had, make the anti-preheater system device of the underground fire that is used for fire monitoring under the coal mine, and the overheating protection apparatus.But in real work, how to improve the memory performance of CuZnAl memorial alloy, guarantee that the CuZnAl memorial alloy has best memory performance, this is one of emphasis of copper-based shape memory alloy research always.In the cold cycling process; The positive backheating elasticity martensitic transformation of the inner generation of alloy; Phase interface is done back and forth migration with the variation of outside temperature between martensite and the parent phase; The interface dislocation is constantly bred in transition process, thereby influences the transformation amount of positive backheating elasticity martensitic transformation, on the memory performance of alloy, shows as the round trip memory capacitance and constantly reduces.The memory performance that how to improve copper zinc-aluminium memorial alloy is to hinder its bottleneck problem of applying always.To this problem, the present invention has developed a kind of method of the CuZnAl of raising memorial alloy memory performance.Through inquiry, not seeing has related patent U.S. Patent No. to deliver.
Summary of the invention
The method that the purpose of this invention is to provide a kind of CuZnAl of raising memorial alloy memory performance.It is characterized by: preparation CuZnAl memorial alloy, its chemical ingredients is weight percentage, Zn22%-26%, Al3%-4%, surplus is a copper.Adopt medium-frequency induction furnace to melt; Add special composite rare-earth modifier 0.2%-1.0% behind the above-mentioned alloy melting; Also be that (wherein: Y is that the 30-45% of special composite rare-earth modifier weight, the 5-15% that La is special composite rare-earth modifier weight, the 3-10% that Nb is special composite rare-earth modifier weight, the 3-10% that Ce is special composite rare-earth modifier weight, 1-8%, the Eu+Zr+Pr+Tb+Ti+ Er+B+Ho+Lu that V is special composite rare-earth modifier weight are the 5-15% of special composite rare-earth modifier weight to weight percent; Surplus is a copper); When smelting temperature reaches 1300-1350 ℃, pour into the ingot casting that diameter is φ 80 * 150mm.Anneal is to be heated to 820 ℃ of insulations furnace cooling after 24 hours, removes the dezincify layer of surperficial 2-3mm then, forges the thick sheet material to 11mm again, is rolled into the 0.3mm thin plate at last.Heat treatment quenching process is set; Its concrete technology is: 790 ℃-880 ℃ insulations are quenched after 20-40 minute in the room temperature oil, carry out in the 140-160 ℃ of oil in insulation 20-40 minute, the 90-100 ℃ water 20-30 minute three grades of ageing treatment of insulation in insulation 20-30 minute, the 40-50 ℃ water more successively.The prestrain amount of choosing is to be 5-25%.Circulatory mediator is respectively 100 ℃ of oil and room temperature water.
The special composite rare-earth modifier add-on can be preferably: 0.4%-0.6%; Heat treatment quenching process can be preferably: 835 ℃ of insulations are quenched after 30 minutes in the room temperature oil; Three grades of ageing treatment can be preferably: be incubated 25 minutes in 25 minutes, 45 ℃ water of insulation in 30 minutes, 95 ℃ water of insulation in 150 ℃ of oil.The prestrain amount can be preferably: 15%, and circulatory mediator is respectively 100 ℃ of oil and room temperature water, under this processing parameter, carries out 20 constraint circuit training, and the memory performance of alloy is in optimum range at this moment.
Description of drawings
The relation of Fig. 1 heat treatment quenching process and memory performance (circulatory mediator is 100 ℃ of oil and room temperature water)
Choosing heat treatment quenching process is: 790 ℃-880 ℃ insulations (see figure 1) in the room temperature oil of quenching after 20-40 minute, carry out in the 140-160 ℃ of oil in insulation 20-40 minute, the 90-100 ℃ water 20-30 minute three grades of ageing treatment of insulation in insulation 20-30 minute, the 40-50 ℃ water more successively.When adopting heat treatment quenching process and three grades of aging treatment process, when the first step heat-treatment quenching, no matter generation is 9R or 18R martensite; When three grades of ageing treatment subsequently; All change 18R martensite into, the stress in the alloy reduces simultaneously, has kept martensitic ordered structure; Make living nuclear of reverse transformation and martensite be orientated again and become easily, therefore improved the memory performance of alloy.
The relation of Fig. 2 prestrain amount and memory performance (three grades of ageing treatment, circulatory mediator are 100 ℃ of oil and room temperature water)
Choosing the prestrain amount is 15%, and when circulatory mediator was 100 ℃ of oil and room temperature water, the memory performance of alloy was best.Can be found out that by Fig. 2 along with the increase of prestrain amount, the memory performance of alloy increases, but the prestrain amount surpasses after 15%, the shape-memory properties of alloy descends.Because the prestrain amount is hour, with the increase of prestrain amount, the forming core that helps stress-induced martensite with grow up, and the motion of variant and orientation again impel martensitic preferred orientation, help the memory performance increase of alloy.When the prestrain amount increased again, after 15%, alloy followed in the process cold and hot; The positive backheating elasticity martensitic transformation of inner generation; Phase interface is done migration repeatedly with the variation of outside temperature between martensite and the parent phase, and the interface dislocation constantly increases in transition process, and dislocation desity is the value of reaching capacity very soon; Thereby influence the transformation amount of positive backheating elasticity martensitic transformation, the memory performance of alloy is descended.
Fig. 3 circulatory mediator is the X diffraction of 100 ℃ of oil and room temperature water
Characteristic curve is big to the spacing of M (1210) and M (2010), and this explanation alloy martensite degree of order this moment is high, so the memory performance of alloy is good.
Embodiment
Embodiment 1
Preparation CuZnAl memorial alloy, its chemical ingredients (weight percent) is Zn24.62%, Al3.51%, special composite rare-earth modifier 0.4%, Yu Weitong.Pour into the ingot casting that diameter is φ 80 * 150mm after the melting.Anneal is to be heated to 820 ℃ of insulations furnace cooling after 24 hours, removes the dezincify layer of surperficial 2-3mm then, forges the thick sheet material to 11mm again, is rolled into the 0.3mm thin plate at last.Heat treatment quenching process is: 835 ℃ of insulations are quenched after 30 minutes in the room temperature oil, carried out in 150 ℃ of oil in 30 minutes, 95 ℃ water of insulation insulation more successively 25 minutes and 45 ℃ of water in three grades of ageing treatment of 25 minutes of insulation.Choosing the prestrain amount is 15%, and circulatory mediator is 100 ℃ of oil and room temperature water.
Embodiment 2
Preparation CuZnAl memorial alloy, its chemical ingredients (weight percent) is Zn22.04%, Al3.99%, special composite rare-earth modifier 0.6%, Yu Weitong.Pour into the ingot casting that diameter is φ 80 * 150mm after the melting.Anneal is to be heated to 820 ℃ of insulations furnace cooling after 24 hours, removes the dezincify layer of surperficial 2-3mm then, forges the thick sheet material to 11mm again, is rolled into the 0.3mm thin plate at last.Heat treatment quenching process is: 820 ℃ of insulations are quenched after 20 minutes in the room temperature oil, carried out in 140 ℃ of oil in 20 minutes, 90 ℃ water of insulation insulation more successively 20 minutes and 40 ℃ of water in three grades of ageing treatment of 20 minutes of insulation.Choosing the prestrain amount is 15%, and circulatory mediator is 100 ℃ of oil and room temperature water.
Embodiment 3
Preparation CuZnAl memorial alloy, its chemical ingredients (weight percent) is Zn25.98%, Al3.05%, special composite rare-earth modifier 0.2%, Yu Weitong.Pour into the ingot casting that diameter is φ 80 * 150mm after the melting.Anneal is to be heated to 820 ℃ of insulations furnace cooling after 24 hours, removes the dezincify layer of surperficial 2-3mm then, forges the thick sheet material to 11mm again, is rolled into the 0.3mm thin plate at last.Heat treatment quenching process is: 850 ℃ of insulations are quenched after 40 minutes in the room temperature oil, carried out in 160 ℃ of oil in 40 minutes, 100 ℃ water of insulation insulation more successively 30 minutes and 50 ℃ of water in three grades of ageing treatment of 30 minutes of insulation.Choosing the prestrain amount is 15%, and circulatory mediator is 100 ℃ of oil and room temperature water.
Comparative Examples
Preparation CuZnAl memorial alloy, its chemical ingredients (weight percent) is Zn24.62%, Al3.51%, Yu Weitong.Pour into the ingot casting that diameter is φ 80 * 150mm after the melting.Anneal is to be heated to 820 ℃ of insulations furnace cooling after 24 hours, removes the dezincify layer of surperficial 2-3mm then, forges the thick sheet material to 11mm again, is rolled into the 0.3mm thin plate at last.Heat treatment quenching process is: 835 ℃ of insulations are quenched after 30 minutes in the room temperature oil.Choosing the prestrain amount is 15%, and circulatory mediator is 100 ℃ of oil and room temperature water.
CuZnAl memorial alloy to obtaining under embodiment and the Comparative Examples processing parameter carries out 20 cold and hot constraint circuit training, and memory performance is seen table 1, Fig. 1, Fig. 2.The compound rare-earth CuZnAl memorial alloy visible by table 1, that embodiment 1 obtains down to embodiment 3 processing parameters, its memory performance is best.Visible by Fig. 3, its characteristic curve of constraint circuit training is right in 100 ℃ of machine oil, and the spacing of M (1210) and M (2010) is big, and this explanation alloy martensite degree of order at this moment is high, so the memory performance of alloy is good.
Table 1 thermal treatment process is to the influence of alloy memory performance (response rate)
Claims (6)
1. method that improves CuZnAl memorial alloy memory performance is characterized by: preparation compound rare-earth CuZnAl memorial alloy, and its chemical ingredients is weight percentage, Zn22%-26%, Al3%-4%, surplus is a copper; Adopt medium-frequency induction furnace to melt; Add special composite rare-earth modifier 0.2%-1.0% behind the above-mentioned alloy melting; It also is weight percent; Wherein: Y is that the 30-45% of special composite rare-earth modifier weight, the 5-15% that La is special composite rare-earth modifier weight, the 3-10% that Nb is special composite rare-earth modifier weight, the 3-10% that Ce is special composite rare-earth modifier weight, 1-8%, the Eu+Zr+Pr+Tb+Ti+ Er+B+Ho+Lu that V is special composite rare-earth modifier weight are the 5-15% of special composite rare-earth modifier weight, and surplus is a copper; When smelting temperature reaches 1300-1350 ℃, pour into the ingot casting that diameter is φ 80 * 150mm; Anneal is to be heated to 820 ℃ of insulations furnace cooling after 24 hours, removes the dezincify layer of surperficial 2-3mm then, forges the thick sheet material to 11mm again, is rolled into the 0.3mm thin plate at last; Heat-treating quenching, three grades of ageing treatment and circuit training then handles.
2. according to the said a kind of method that improves CuZnAl memorial alloy memory performance of claim 1, special composite rare-earth modifier is gone into amount and can be preferably: 0.4%-0.6%.
3. according to the said a kind of method that improves CuZnAl memorial alloy memory performance of claim 1-2, heat treatment quenching process is: 820 ℃-850 ℃ insulations are quenched after 20-40 minute in the room temperature oil.
4. according to the said a kind of method that improves CuZnAl memorial alloy memory performance of claim 1-3, carry out being incubated in insulation 20-30 minute, the 40-50 ℃ water in insulation 20-40 minute, the 90-100 ℃ water in the 140-160 ℃ of oil 20-30 minute three grades of ageing treatment more successively.
5. according to the said a kind of method that improves CuZnAl memorial alloy memory performance of claim 3, three grades of ageing treatment can be preferably: be incubated 25 minutes in 25 minutes, 45 ℃ water of insulation in 30 minutes, 95 ℃ water of insulation in 150 ℃ of oil.
6. according to the said a kind of method that improves CuZnAl memorial alloy memory performance of claim 1-5; Choosing the prestrain amount is to be 15%; Circulatory mediator is respectively 100 ℃ of oil and room temperature water, under this processing parameter, carries out 20 constraint circuit training, and the memory performance of alloy is in optimum range at this moment.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103276240A (en) * | 2013-06-06 | 2013-09-04 | 镇江忆诺唯记忆合金有限公司 | Copper-zinc-aluminium-shaped memory alloy for raising thermal fatigue performance |
| CN104232981A (en) * | 2013-06-13 | 2014-12-24 | 镇江忆诺唯记忆合金有限公司 | Method for raising rolling wearability of copper-zinc-aluminium memory alloy in alkaline medium |
| CN104233134A (en) * | 2013-06-14 | 2014-12-24 | 镇江忆诺唯记忆合金有限公司 | Heat treatment method for increasing rolling wearability of copper zinc aluminium memory alloy under alkalescence |
| CN104233130A (en) * | 2013-06-12 | 2014-12-24 | 镇江忆诺唯记忆合金有限公司 | Process for improving thermal fatigue property of copper-zinc-aluminum shape memory alloy |
| CN104233133A (en) * | 2013-06-15 | 2014-12-24 | 镇江忆诺唯记忆合金有限公司 | Process for increasing rolling wearability of copper memory alloy under acidic medium |
| CN104342608A (en) * | 2013-08-04 | 2015-02-11 | 镇江忆诺唯记忆合金有限公司 | Heat treatment process for improving damping ratios of copper-zinc-aluminum memory alloys with Ms of 50 DEG C |
| CN104342611A (en) * | 2013-08-09 | 2015-02-11 | 镇江忆诺唯记忆合金有限公司 | Heat treatment process for improving frictional wear performances of copper-zinc-aluminum shape memory alloys |
| CN106011538A (en) * | 2016-07-04 | 2016-10-12 | 燕山大学 | Method for controlling grain equi-axiation to improve plasticity of Ti20Zr6.5Al4V alloy |
| CN111893344A (en) * | 2020-08-06 | 2020-11-06 | 贵溪骏达特种铜材有限公司 | Aluminum bronze memory alloy and preparation method thereof |
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| CN102021465A (en) * | 2010-10-15 | 2011-04-20 | 镇江忆诺唯记忆合金有限公司 | Composite rare earth addictive for preventing Mn in CuAlMn memory alloy from volatilizing |
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| CN101168816A (en) * | 2007-11-30 | 2008-04-30 | 江苏大学 | Composite rear earth alterant used for thermal fatigue resisting steel |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103276240A (en) * | 2013-06-06 | 2013-09-04 | 镇江忆诺唯记忆合金有限公司 | Copper-zinc-aluminium-shaped memory alloy for raising thermal fatigue performance |
| CN104233130A (en) * | 2013-06-12 | 2014-12-24 | 镇江忆诺唯记忆合金有限公司 | Process for improving thermal fatigue property of copper-zinc-aluminum shape memory alloy |
| CN104232981A (en) * | 2013-06-13 | 2014-12-24 | 镇江忆诺唯记忆合金有限公司 | Method for raising rolling wearability of copper-zinc-aluminium memory alloy in alkaline medium |
| CN104233134A (en) * | 2013-06-14 | 2014-12-24 | 镇江忆诺唯记忆合金有限公司 | Heat treatment method for increasing rolling wearability of copper zinc aluminium memory alloy under alkalescence |
| CN104233133A (en) * | 2013-06-15 | 2014-12-24 | 镇江忆诺唯记忆合金有限公司 | Process for increasing rolling wearability of copper memory alloy under acidic medium |
| CN104342608A (en) * | 2013-08-04 | 2015-02-11 | 镇江忆诺唯记忆合金有限公司 | Heat treatment process for improving damping ratios of copper-zinc-aluminum memory alloys with Ms of 50 DEG C |
| CN104342611A (en) * | 2013-08-09 | 2015-02-11 | 镇江忆诺唯记忆合金有限公司 | Heat treatment process for improving frictional wear performances of copper-zinc-aluminum shape memory alloys |
| CN106011538A (en) * | 2016-07-04 | 2016-10-12 | 燕山大学 | Method for controlling grain equi-axiation to improve plasticity of Ti20Zr6.5Al4V alloy |
| CN111893344A (en) * | 2020-08-06 | 2020-11-06 | 贵溪骏达特种铜材有限公司 | Aluminum bronze memory alloy and preparation method thereof |
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Application publication date: 20121017 |