CN105274455A - Annealing technique for improving performance of MgAlMn2Ni alloy - Google Patents
Annealing technique for improving performance of MgAlMn2Ni alloy Download PDFInfo
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- CN105274455A CN105274455A CN201410295083.1A CN201410295083A CN105274455A CN 105274455 A CN105274455 A CN 105274455A CN 201410295083 A CN201410295083 A CN 201410295083A CN 105274455 A CN105274455 A CN 105274455A
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Abstract
The invention discloses an annealing technique for improving the performance of MgAlMn2Ni alloy. The annealing technique is characterized by comprising the following steps that firstly, the chemical compositions including, by mass, 63.1% of La, 26.0% of Ce, 2.7% of Pr, 8.2% of Nd, metallic N with the purity being higher than 99.8%, metallic Mn with the purity being higher than 99.8%, metallic Al with the purity being higher than 99.8% and metallic Mg with the purity being higher than 99.8% are proportioned according to a stoichiometric ratio, and Mm(NiCoMnAl)5 alloy and Mg2Ni alloy are prepared respectively through a vacuum induction melting method; and secondly, the Mm(NiCoMnAl)5 alloy and the Mg2Ni alloy are weighed and mixed according to a designed mass ratio of 95:5, cast composite alloy including, by mass, 95% of the Mm(NiCoMnAl)5 and 5% of Mg2Ni is prepared through remelting by means of the vacuum induction melting method, the cast composite alloy is placed into a quartz glass tube during melting, annealing heat treatment is conducted at the temperature of 1023-1223 K for ten hours after the quartz glass tube is vacuumized, filled with argon and sealed, an alloy sample is cooled with a furnace after annealing, and the annealed alloy is obtained.
Description
Technical field
The present invention relates to a kind of preparation technology of MgAlMn2Ni alloy, particularly a kind of annealing process improving MgAlMn2Ni alloy property.
Background technology
The application of aluminium is very wide in a metal, be only second to iron and steel, and content ranking is at the metallic element of first place, is thus called as second largest metalloid material.7B50 aluminium alloy market outlook are good, with high content of technology, have delayed effect of development, can form industry and play a significant role to our province industry restructuring.The coordinated balance of energy retention, economy, environment, resource simultaneously.Be the direction promoted in world wide and develop, there is important social benefit and environmental benefit.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of annealing process improving MgAlMn2Ni alloy property, to obtain the MgAlMn2Ni alloy of excellent performance.
Technical scheme of the present invention is: a kind of annealing process improving MgAlMn2Ni alloy property; comprise following steps: the first step; by chemical constitution massfraction: 63.1%La; 26.0%Ce; 2.7%Pr and 8.2%Nd and purity are all stoichiometrically prepared burden higher than metal N, Mn, Al and Mg of 99.8%, adopt vacuum induction melting method to prepare Mm (NiCoMnAl) 5 and Mg2Ni alloy respectively; Second step, by the mass ratio 95:5 of design, two kinds of alloys are weighed and mix, adopt vacuum induction melting method remelting preparation quality mark Mm (NiCoMnAl) 5/5%Mg2Ni as cast condition composite alloy again, during melting, get as cast condition composite alloy and put into quartz glass tube, vacuumize, carry out annealing thermal treatment after applying argon gas, tube sealing, annealing temperature is respectively 1023-1223K, annealing time is 10h, alloy sample furnace cooling after annealing, obtains annealed state alloy.
Annealing temperature is 1023K.
Beneficial effect of the present invention: by the phase structure of MgAlMn2Ni alloy before and after annealing and Electrochemical Properties, draws to draw a conclusion:
(1) as cast condition MgAlMn2Ni alloy is by LaNi5 phase and a small amount of Mg2Ni phase composite.And composite alloy is after anneal, in alloy except LaNi5 phase, have also appeared cenotype (La, Mg) Ni3.With the rising of annealing temperature, due to the minimizing of Mg element, in annealed alloy, the content of cenotype (La, Mg) Ni3 reduces.After annealing, alloying constituent, organize more even, in alloy, microstrain, lattice imperfection reduce.
(2) with as cast condition MgAlMn2Ni alloy phase ratio, the activation performance of annealed state alloy is significantly improved.With the rising of annealing temperature, the maximum discharge capacity of alloy and high-rate discharge ability all present the Changing Pattern first increasing and reduce afterwards, and when annealing temperature is 1023K, the above performance of alloy all reaches best.The capability retention of alloy is monotone increasing with the rising of annealing temperature.
Accompanying drawing explanation
Fig. 1 is the SEM photo of as cast condition and annealed state MgAlMn2Ni alloy.
Embodiment
Two step smelting processes are adopted to prepare MgAlMn2Ni alloy.The first step, by mishmetal Mm (chemical constitution: 63.1% (massfraction) La, 26.0% (massfraction) Ce, 2.7% (massfraction) Pr and 8.2% (massfraction) Nd) and purity all stoichiometrically prepare burden higher than the metal (N, Mn, Al and Mg) of 99.8%, adopt vacuum induction melting method to prepare Mm (NiCoMnAl) 5 and Mg2Ni alloy respectively.Two kinds of alloys are weighed and mix by the mass ratio 95: 5 of design, then adopting the remelting of vacuum induction melting method to prepare Mm (NiCoMnAl) 5/5% (massfraction) Mg2Ni as cast condition composite alloy by second step.During melting, consider Mm and Mg scaling loss and volatilization.Get as cast condition composite alloy and put into quartz glass tube, vacuumize, carry out annealing thermal treatment after applying argon gas, tube sealing, annealing temperature is respectively 1023,1123 and 1223K, and annealing time is 10h, and alloy sample furnace cooling after annealing obtains annealed state alloy.OPTIMA7000V type Inductively coupled plasma optical emission spectrometer (ICP) measuring means using PerkinElmer company of the U.S. to produce measures alloying constituent composition.The PW1830 type X-ray diffractometer that the material phase analysis of alloy is produced in Dutch Philips company carries out, and test condition: Cu target K alpha-ray, continuous sweep, scanning speed 1 °/min, sweep limit is 20 ~ 80 °.Jade5.0 software is adopted to carry out lattice parameter calculating.SU8010 type cold field emission scanning electron microscope (SEM) that HIT produces analyzes the tissue topography of alloy.Alloy electrochemical performance test is carried out in opening three electrode test system.
2-in-1 golden microtexture and phase structure
Fig. 1 is the SEM photo of as cast condition and annealed state MgAlMn2Ni alloy.As seen from Figure 1, Microstructures of As cast Alloys and composition are even not, and alloy phase cannot be distinguished; And annealed alloy improves its microstructure and composition homogenizing gradually with annealing temperature, annealed alloy is made up of matrix CaCu5 type phase (light gray areas α) and a small amount of PuNi type phase (darker regions β).
The capability retention of 60 loops back fire state alloys is apparently higher than cast alloy.And the capability retention of alloy with the rising of annealing temperature monotone increasing, this illustrates that anneal is conducive to the improvement of alloy cyclical stability.The improvement of cyclical stability is mainly owing to following two aspects: (1) anneal causes alloying constituent more even, uniform alloying constituent will suppress alloying pellet efflorescence, thus the productive technique that improve alloy is conducive to alloy cyclical stability.
Claims (2)
1. one kind is improved the annealing process of MgAlMn2Ni alloy property; it is characterized in that: comprise following steps: the first step; by chemical constitution massfraction: 63.1%La; 26.0%Ce; 2.7%Pr and 8.2%Nd and purity are all stoichiometrically prepared burden higher than metal N, Mn, Al and Mg of 99.8%, adopt vacuum induction melting method to prepare Mm (NiCoMnAl) 5 and Mg2Ni alloy respectively; Second step, by the mass ratio 95:5 of design, two kinds of alloys are weighed and mix, adopt vacuum induction melting method remelting preparation quality mark Mm (NiCoMnAl) 5/5%Mg2Ni as cast condition composite alloy again, during melting, get as cast condition composite alloy and put into quartz glass tube, vacuumize, carry out annealing thermal treatment after applying argon gas, tube sealing, annealing temperature is respectively 1023-1223K, annealing time is 10h, alloy sample furnace cooling after annealing, obtains annealed state alloy.
2. a kind of annealing process improving MgAlMn2Ni alloy property according to claim 1, is characterized in that: annealing temperature is 1023K.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410295083.1A CN105274455A (en) | 2014-06-27 | 2014-06-27 | Annealing technique for improving performance of MgAlMn2Ni alloy |
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| CN201410295083.1A CN105274455A (en) | 2014-06-27 | 2014-06-27 | Annealing technique for improving performance of MgAlMn2Ni alloy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US11868299B2 (en) | 2018-10-18 | 2024-01-09 | Shanghai Cambricon Information Technology Co., Ltd. | Network-on-chip data processing method and device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11868299B2 (en) | 2018-10-18 | 2024-01-09 | Shanghai Cambricon Information Technology Co., Ltd. | Network-on-chip data processing method and device |
| US11880330B2 (en) | 2018-10-18 | 2024-01-23 | Shanghai Cambricon Information Technology Co., Ltd. | Network-on-chip data processing method and device |
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Application publication date: 20160127 |