CN106715736A - Magnesium alloy, magnesium alloy plate, magnesium alloy member, and method for producing magnesium alloy - Google Patents
Magnesium alloy, magnesium alloy plate, magnesium alloy member, and method for producing magnesium alloy Download PDFInfo
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- CN106715736A CN106715736A CN201580049782.0A CN201580049782A CN106715736A CN 106715736 A CN106715736 A CN 106715736A CN 201580049782 A CN201580049782 A CN 201580049782A CN 106715736 A CN106715736 A CN 106715736A
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- magnesium alloy
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- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 191
- 238000004519 manufacturing process Methods 0.000 title claims description 56
- 239000002245 particle Substances 0.000 claims abstract description 89
- 150000001875 compounds Chemical class 0.000 claims abstract description 87
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 73
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 72
- 238000000034 method Methods 0.000 claims description 92
- 239000013078 crystal Substances 0.000 claims description 39
- 238000005266 casting Methods 0.000 claims description 36
- 238000001816 cooling Methods 0.000 claims description 33
- 239000000155 melt Substances 0.000 claims description 31
- 239000011572 manganese Substances 0.000 description 136
- 239000000463 material Substances 0.000 description 67
- 239000000203 mixture Substances 0.000 description 48
- 229910045601 alloy Inorganic materials 0.000 description 40
- 239000000956 alloy Substances 0.000 description 40
- 229910018131 Al-Mn Inorganic materials 0.000 description 34
- 229910018461 Al—Mn Inorganic materials 0.000 description 34
- 230000008569 process Effects 0.000 description 29
- 238000012545 processing Methods 0.000 description 22
- 238000005096 rolling process Methods 0.000 description 19
- 238000005260 corrosion Methods 0.000 description 18
- 230000007797 corrosion Effects 0.000 description 18
- 238000012360 testing method Methods 0.000 description 17
- 239000011777 magnesium Substances 0.000 description 13
- 239000002994 raw material Substances 0.000 description 13
- 230000008859 change Effects 0.000 description 11
- 238000002474 experimental method Methods 0.000 description 11
- 239000011701 zinc Substances 0.000 description 11
- 230000015572 biosynthetic process Effects 0.000 description 10
- 238000011282 treatment Methods 0.000 description 10
- 230000001186 cumulative effect Effects 0.000 description 9
- 229910052749 magnesium Inorganic materials 0.000 description 9
- 230000009467 reduction Effects 0.000 description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 7
- 229910052725 zinc Inorganic materials 0.000 description 7
- 239000011575 calcium Substances 0.000 description 6
- 238000009826 distribution Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 239000000470 constituent Substances 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 229910000765 intermetallic Inorganic materials 0.000 description 4
- 238000003801 milling Methods 0.000 description 4
- 238000004080 punching Methods 0.000 description 4
- 238000001878 scanning electron micrograph Methods 0.000 description 4
- 229910052727 yttrium Inorganic materials 0.000 description 4
- 229910052684 Cerium Inorganic materials 0.000 description 3
- 230000004075 alteration Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 238000001953 recrystallisation Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 229910052790 beryllium Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000007712 rapid solidification Methods 0.000 description 2
- 238000000682 scanning probe acoustic microscopy Methods 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000002560 therapeutic procedure Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- INCHANCIPURAPN-NTEUORMPSA-N 2-[(E)-(pyridin-2-ylhydrazinylidene)methyl]benzenethiol Chemical compound Sc1ccccc1\C=N\Nc1ccccn1 INCHANCIPURAPN-NTEUORMPSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 229910000846 In alloy Inorganic materials 0.000 description 1
- 241001062009 Indigofera Species 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910003023 Mg-Al Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000004453 electron probe microanalysis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000048 melt cooling Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000013081 microcrystal Substances 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 238000005480 shot peening Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
- B22D21/02—Casting exceedingly oxidisable non-ferrous metals, e.g. in inert atmosphere
- B22D21/04—Casting aluminium or magnesium
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/02—Alloys based on magnesium with aluminium as the next major constituent
-
- 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
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
-
- 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
Abstract
A magnesium alloy which contains, in mass%, from 1% to 12% (inclusive) of Al and from 0.1% to 5% (inclusive) of Mn, and which is provided with a structure wherein particles of a compound containing Al and Mn are dispersed. The average particle diameter of the particles of the compound is from 0.3 [mu]m to 1 [mu]m (inclusive), and the area ratio of the particles of the compound is from 3.5% to 25% (inclusive).
Description
Technical field
Magnesium alloy the present invention relates to be suitable for the constituent material of housing, various parts etc., is adapted for use in secondary operation
The magnesium alloy plate of the raw material (time processing material) of material such as housing and various parts, is suitable for secondary operation material such as housing
With the magnesium alloy component of various parts, and the magnesium alloy manufacture method.Especially, the present invention relates to impact resistance, machinery
Characteristic, the magnesium alloy that plastic working is excellent and productivity ratio is also excellent, magnesium alloy plate and magnesium alloy component.
Background technology
Lightweight and specific strength and various parts such as automobile has been increasingly being used as it than the magnesium alloy of excellent rigidity
Part and portable electronic/electric device such as portable phone and notebook computer housing constituent material.
Magnesium alloy is lighter than many other metals, specific strength is high and also with excellent impact absorbency.Due to various units
Element makes an addition to active Mg (magnesium), therefore these magnesium alloys also have excellent corrosion resistance and are preferred for above-mentioned various parts
Constituent material.Among these magnesium alloys, the intensity and excellent corrosion resistance of the Mg-Al based alloys particularly containing Al (aluminium)
And it is preferred for above-mentioned constituent material.
Patent document 1 discloses be made up of the magnesium alloy containing Al and Mn (manganese) and impact resistance and mechanical property not only
Magnesium alloy plate excellent at normal temperatures and at low temperature.
This magnesium alloy plate is contained the compound containing Al and Mn and (is mainly separated out with crystal.These are hereinafter properly termed as
Al-Mn crystalline phases).The Al-Mn crystalline phases are very fine and amount is considerably less, and are preferably created substantially absent.Therefore,
In the magnesium alloy plate, rupture for being caused by thick Al-Mn crystalline phases etc. is unlikely to occur.Therefore, the magnesium alloy plate
Impact resistance and mechanical property is excellent and plastic working such as press processability is also excellent.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2011-006754 publications
The content of the invention
Technical problem
Expect exploitation impact resistance, mechanical property such as intensity, yield strength and elongation and plastic working such as rolling
Processability and the magnesium alloy that press processability is excellent and productivity ratio is also excellent.
The above-mentioned impact resistance of magnesium alloy plate disclosed in patent document 1 etc. is excellent.However, in order to reduce Al-Mn knots
The amount of crystalline phase, is set to comparing high by the melt temperature of alloy, i.e., 700 DEG C.In theory, melting when the magnesium alloy containing Al and Mn
Temperature is easiest to form and grow the Al-Mn crystalline phases in 630 DEG C or so, especially less than 630 DEG C.Therefore, institute is worked as
When stating the melt temperature of alloy sufficiently above 630 DEG C, preferably above 690 DEG C, can effectively prevent Al-Mn crystalline phases formation and
Growth.However, when the melt temperature of alloy is improved, there is situations below.The melt of (α) alloy is easily aoxidized, and this meeting
Due to oxide formation and be mixed into and cause the yield rate to reduce.(β) is when for example in order to prevent from aoxidizing and use high vacuum atmosphere
When, cause the melt of alloy to become to be difficult to process because of the vapour pressure high of Mg, so that deteriorated workability.(γ) needs a large amount of
Energy the melt of alloy is maintained at high temperature.(δ) is high temperature due to the melt of alloy, has hence speeded up the hot bad of equipment
Change.From the point of view, it is difficult to improve productivity ratio.Above-mentioned (α) to (δ) can also cause the cost to increase.
It is an object of the present invention to provide impact resistance, mechanical property and plastic working is excellent and productivity ratio is also excellent
Different magnesium alloy.
It is a further object to provide impact resistance, mechanical property and plastic working is excellent and productivity ratio
Excellent magnesium alloy plate.
The magnesium that a further object of the present invention is to provide impact resistance and mechanical property is excellent and productivity ratio is also excellent is closed
Golden component.
It is also another object of the present invention to provide can be with high production rate manufacture impact resistance, mechanical property and plastic working
The manufacture method of the magnesium alloy of excellent magnesium alloy.
Solve the technological means of technical problem
The magnesium alloy of one aspect of the invention contains in terms of quality % more than 1% and less than 12% Al and more than 0.1%
And the structure that less than 5% Mn and the particle with the compound containing Al and Mn are dispersed therein.The particle of the compound
Average grain diameter be more than 0.3 μm and less than 1 μm, and the particle of the compound area ratio be more than 3.5% and
Less than 25%.
The manufacture method of the magnesium alloy of one aspect of the invention is included to containing in terms of quality % more than 1% and less than 12%
Al and more than 0.1% and the melt of the magnesium alloy of less than 5% Mn the step of carry out continuously casting.In the manufacture method,
Will with the temperature of the melt before contacting dies be more than 630 DEG C and less than 690 DEG C, and the melt cooling
Speed is more than 560 DEG C/sec.
The beneficial effect of the invention
The impact resistance of above-mentioned magnesium alloy, mechanical property and plastic working is excellent and productivity ratio is also excellent.Above-mentioned magnesium
The manufacture method of alloy can be with high production rate manufacture impact resistance, mechanical property and the excellent magnesium alloy of plastic working.
Brief description of the drawings
[Fig. 1] Fig. 1 thereon figure show under SEM (SEM) observe implementation method magnesium alloy
The microphoto (secondary electron image) in the section of plate (sample number 1-1), and also bottom panel show by changing secondary electricity
The bianry image that the contrast of subgraph is obtained.
[Fig. 2] Fig. 2 is the micro- photograph in the section of the magnesium alloy plate (sample number 1-1) of the implementation method observed in the secure execution mode (sem
Piece (backscattered electron image).
[Fig. 3] Fig. 3 shows the composition collection of illustrative plates (Group in the section of the magnesium alloy plate (sample number 1-1) of implementation method into マ ッ ピ
Application グ), the composition collection of illustrative plates is shown and added in the electron gun of 15kV by field emission electron probe-microanalyser (FE-EPMA)
The concentration distribution of the Mn obtained under fast voltage.
[Fig. 4] Fig. 4 is the concentration (number that Mn is counted) for showing Mn to the frequency and the histogram of cumulative frequency of concentration, institute
State histogram using by FE-EPMA (15kV) obtain and figure 3 illustrates composition collection of illustrative plates make.
[Fig. 5] Fig. 5 shows the composition collection of illustrative plates in the section of the magnesium alloy plate (sample number 1-1) of implementation method in its left figure,
The composition collection of illustrative plates shows the electron gun accelerating potential by field emission electron probe-microanalyser (FE-EPMA) in 5kV
Under the concentration distribution of Mn that obtains.Fig. 5 also right figure show in the secure execution mode (sem observe with it is described composition collection of illustrative plates region it is identical
Region microphoto (backscattered electron image).
[Fig. 6] Fig. 6 is the concentration (number that Mn is counted) for showing Mn to the frequency and the histogram of cumulative frequency of concentration, institute
State histogram using by FE-EPMA (5kV) obtain and figure 5 illustrates composition collection of illustrative plates make.
[Fig. 7] Fig. 7 is the explanatory diagram of the test method for illustrating impact resistance experiment.
Specific embodiment
The present inventor has manufactured with the composition containing Al and Mn under various manufacturing conditions and can provide particularly
Excellent intensity and the magnesium alloy of corrosion resistance, so as to examine or check impact resistance, mechanical property and the excellent magnesium of plastic working close
The structure of gold.Result the inventors discovered that, with being contained containing Al and Mn and size in particular range with the amount in particular range
Compound (Al-Mn crystalline phases) structure magnesium alloy can have and only contain very small amount of above-claimed cpd or essence
The above impact resistance of the magnesium alloy equal extent of compound, mechanical property and plastic working without as.Specifically, when
Magnesium alloy has containing a certain amount of above-claimed cpd and during the finer and dispersed structure of these compounds, described
Magnesium alloy can have and only contain very small amount of above-claimed cpd or same essentially without the magnesium alloy of such compound
Impact resistance, mechanical property and plastic working etc. degree.The present inventors have additionally discovered that, the magnesium alloy with above-mentioned ad hoc structure
Can be manufactured by specific casting process, the casting process is included with by will be with the conjunction before contacting dies
The temperature of the melt of gold is set to as low as possible and cooling velocity mode very high carries out continuously casting.In the manufacture method
In, the melt of the alloy is kept than relatively low temperature.This can alleviate when alloy melt at high temperature when can occur
The problem and other problems of above-mentioned (α) to (δ) so that impact resistance, mechanical property and plastic working can be improved excellent
The productivity ratio of magnesium alloy.The present invention is based on above-mentioned discovery.First, will enumerate and illustrate embodiments of the present invention it is detailed in
Hold.
(1) magnesium alloy of one aspect of the invention comprising in terms of quality % more than 1% and less than 12% Al and 0.1% with
The structure that upper and less than 5% Mn and the particle with the compound containing Al and Mn are dispersed therein.In the magnesium alloy, institute
The average grain diameter for stating the particle of compound is more than 0.3 μm and less than 1 μm, and the area ratio of the particle of the compound is
More than 3.5% and less than 25%.
The average grain diameter of the particle of the compound is measured using the image observed under an optical microscope.
The area ratio of the particle of the compound by by FE-EPMA under the electron gun accelerating potential of 5kV or 15kV
The composition collection of illustrative plates in the section of the magnesium alloy for obtaining is measured.The details of assay method are described below.
Above-mentioned magnesium alloy contains Al and Mn with the amount in particular range, therefore excellent strength and corrosion resistance is also excellent.
Particularly, in the magnesium alloy, although the particle of the compound containing Al and Mn is with a certain amount of in particular range
In the presence of, but the particle is fine.Therefore, even if when the magnesium alloy bears the impact that for example falls or undergo plasticity to add
When work for example rolls processing or press process, the particle is also unlikely as the starting point of rupture etc. so that the magnesium alloy
Impact resistance, plastic working and mechanical property such as intensity, yield strength and elongation it is excellent.The magnesium alloy has upper
State the dispersion-strengthened structure that the minuteness particle of compound is dispersed therein.This dispersion-strengthened structure increases yield strength, therefore
The magnesium alloy is difficult to produce depression and excellent impact resistance because of above-mentioned impact.Magnesium with above-mentioned specific composition and structure
Alloy can be manufactured for example, by particular cast step described later, therefore productivity ratio is also excellent.
(2) in a kind of exemplary form of the magnesium alloy, the maximum gauge of the particle of the compound is less than 2.5 μ
m。
In above-mentioned form, although there are the particle of a certain amount of compound containing Al and Mn, but these particles
It is very small.Therefore, in above-mentioned form, the rupture with thick compound particles as starting point is unlikely to occur, and it is described
Impact resistance, the mechanical property of magnesium alloy such as intensity, yield strength and elongation and plastic working are more excellent.
(3) in a kind of exemplary form of the magnesium alloy, the average crystal grain diameter of the magnesium alloy is less than 10 μm.
In above-mentioned form, crystal is in itself fine, is therefore less likely to breaking with thick crystal grain as starting point
Split so that impact resistance, the mechanical property of the magnesium alloy such as intensity, yield strength and elongation and plastic working are more
It is excellent.
(4) magnesium alloy plate of one aspect of the invention is formed by above-mentioned (1) to the magnesium alloy of any one of (3).
Be made up of the magnesium alloy with above-mentioned ad hoc structure as this magnesium alloy plate of the example of the magnesium alloy and because
This impact resistance, mechanical property such as intensity, yield strength and elongation and plastic working such as press processability it is excellent and
Productivity ratio is also excellent.Above-mentioned magnesium alloy plate can be preferred for undergoing the secondary operation material (example of plastic working such as press process
Magnesium alloy component as be described hereinafter) raw material.
(5) magnesium alloy component of one aspect of the invention is formed by above-mentioned (1) to the magnesium alloy of any one of (3).It is described
Magnesium alloy component has the plastic working portion for being subjected to plastic working in its at least a portion.
Be made up of the magnesium alloy with above-mentioned ad hoc structure as this magnesium alloy component of the example of the magnesium alloy and
Therefore impact resistance and mechanical property such as intensity, yield strength and elongation is excellent and productivity ratio is also excellent.In the magnesium
In alloy components, rupture is unlikely to occur during plastic working such as press process.Therefore, the production of the magnesium alloy component
Rate is excellent.
(6) manufacture method of the magnesium alloy of one aspect of the invention includes carrying out the melt of magnesium alloy the step of continuously casting
Suddenly, the magnesium alloy contains in terms of quality % more than 1% and less than 12% Al and more than 0.1% and less than 5% Mn.At this
Will be more than 630 DEG C and less than 690 DEG C, and institute with the temperature of the melt before contacting dies in manufacture method
The cooling velocity for stating melt is more than 560 DEG C/sec.
In the manufacture method of above-mentioned magnesium alloy, melting for the magnesium alloy that Al and Mn are contained with the amount in particular range is used
Body, and this causes that the magnesium alloy of manufacture has excellent intensity and corrosion resistance.Particularly, in the manufacturer of above-mentioned magnesium alloy
In method, the temperature of the melt is set to less than conventional use of temperature.Under the design temperature, easily formed and contain Al
With the compound (Al-Mn crystalline phases) of Mn.However, cooling velocity is set to very high so that institute in process of setting can be shortened
State the time that material is maintained at 630 DEG C or so.As a result, in the case of the manufacture method of above-mentioned magnesium alloy, in the alloy only
Appropriate Al-Mn crystalline phases can be formed.In addition, it is suppressed that the growth of the particle of Al-Mn crystalline phases so that there is comparing fine
Al-Mn crystalline phases particle, be typically the particle of the Al-Mn crystalline phases below 1 μm of average grain diameter.In above-mentioned magnesium alloy
Manufacture method in the case of, the particle of such fine Al- crystalline phases can be uniformly dispersed.
Although the temperature of melt is high, but if cooling velocity is low, then the particle growth of Al-Mn crystalline phases.In such case
Under, can for example obtain the structure of the thick particle uneven dispersion of more than 2.5 μm of maximum gauge.These thick particles can
As the starting point of rupture etc..Because thick particle contains Al and Mn, thus cannot ensure Al necessary to minuteness particle and
The amount of Mn so that the amount of the minuteness particle for existing may be not enough.In this case, it is possible to fine Al- can not be obtained fully
The dispersion-strengthened effect of Mn crystalline phases.Therefore, in the magnesium alloy for locally lying in such thick Al-Mn crystalline phases, resistance to punching
Hitting property, mechanical property and plastic working may be deteriorated.However, in the case of the manufacture method of above-mentioned magnesium alloy, because logical
Dispersion-strengthened, the impact resistance of the magnesium alloy of manufacture of the particle of the hard Al-Mn crystalline phases of the normal magnesium alloy for being used for discrete phase
Can be excellent with mechanical property such as intensity and yield strength.In addition, in the case of the manufacture method of above-mentioned magnesium alloy,
The particle of Al-Mn crystalline phases is fine, and these minuteness particles are unlikely as the starting point of rupture etc..Therefore, manufacture
Toughness such as elongation, impact resistance and the plastic working of magnesium alloy can also be excellent.
In the manufacture method of above-mentioned magnesium alloy, because the temperature of melt is than relatively low, therefore following items can be realized.
(α ') can easily suppress the oxidation of melt so that can reduce due to yield rate reduction caused by oxide.(β ') can add
Work is excellent.(γ ') can reduce the energy required for keeping melt temperature.(δ ') can reduce the heat deterioration of manufacturing equipment.
In addition, in the manufacture method of above-mentioned magnesium alloy, due to carrying out continuously casting, therefore can largely produce magnesium alloy.Due to cold
But speed is high, therefore can be readily available fine crystal structure.Therefore, it can be easily manufactured impact resistance, machinery spy
Property and the excellent magnesium alloy of plastic working.Consider the above, in the case of the manufacture method of above-mentioned magnesium alloy, can be with
High production rate manufacture impact resistance, mechanical property and the excellent magnesium alloy of plastic working.
[details of embodiment of the present invention]
Below by the manufacture of magnesium alloy successively to embodiment of the present invention, magnesium alloy plate, magnesium alloy component and magnesium alloy
Method is illustrated.The unit of the content of each element is quality %.
(magnesium alloy, magnesium alloy plate and magnesium alloy component)
Composition
One feature of the magnesium alloy in implementation method is that magnesium alloy has at least containing Al and Mn both as addition unit
The composition of element.In addition to the composition containing Al and Mn, magnesium alloy can also contain the second addition element described later, as long as can be with
The compound (Al-Mn crystalline phases) containing Al and Mn with specific dimensions of specified quantitative is formed in manufacturing process.
In any these compositions, balance of Mg and inevitable impurity, and Mg content more than 50%.
The content of Al is more than 1% and less than 12%.During Al in containing above range, excellent machine is particularly obtained
Tool characteristic such as intensity and excellent corrosion resistance.The content of Al is bigger within the above range, and intensity and corrosion resistance are higher.Cause
This, the content of Al can be more than 3%, more than 5%, more than 5.5% and more than 7%.With more than 8.3% and less than 9.5%
The mechanical property and corrosion resistance for measuring such as ASTM standard AZ91 alloys of the magnesium alloy containing Al are better than containing Al's with about 3% amount
Magnesium alloy such as ASTM standard AZ31 alloys.The content of Al is lower within the above range, can more easily carry out plastic working for example curved
It is bent.Therefore, the content of Al can be less than 7% and particularly less than 4%.There is provided between intensity and machinability well balanced
Al content can be more than 5.5% and less than 12%.A part of Al in alloy is used as such as with the change containing Al and Mn
The compound of compound and intermetallic compound that the compound containing Al and Mg is representative is present, and another part is dissolved in Mg
Form solid solution.
The content of Mn is more than 0.1% and less than 5%.During Mn in containing above range, obtain excellent corrosion-resistant
Property.The content of Mn is bigger within the above range, and corrosion resistance is higher.Therefore, the content of Mn can be more than 0.15%.Mn's contains
Amount is bigger, the compound of easier formation and growth containing Al and Mn.In this case, the amount of solute Al is tended to reduce,
And tend to the presence of thick compound particles.Therefore, the content of Mn can for less than 2%, less than 1.5% and especially
It is less than 1%.Expected more than 0.2% and less than 0.5% Mn contents effectively suppress the excessive formation and growth of above-claimed cpd.
Second addition element can be selected from Zn (zinc), Ca (calcium), Si (silicon), Be (beryllium), Sr (strontium), Y (yttrium), Ag
At least one element in (silver), Sn (tin), Zr (zirconium), Ce (cerium), Au (gold) and rare earth element (except Y and Ce).The tool of Zn
Body content can be more than 0.2% and less than 7.0%, and the concrete content of Ca can be more than 0.2% and less than 6.0%.Si
Concrete content can be more than 0.2% and less than 1.0%, and Be concrete content can for more than 0.0001% and
Less than 0.002%.The concrete content of Sr can be more than 0.2% and less than 7.0%, and Y concrete content can for 1.0% with
It is upper and less than 6.0%.The concrete content of Ag can be more than 0.5% and less than 3.0%, and the concrete content of Sn can be
More than 0.01% and less than 2.0%.The concrete content of Zr can be more than 0.1% and less than 1.0%, and the concrete content of Ce can
Think more than 0.05% and less than 1.0%.The concrete content of rare earth element (except Y and Ce) can be more than 1.0% and 3.5%
Below.
When containing second addition element, only containing the one kind in cited element, or can contain two
Plant the combination of above element.The second addition element for containing can provide following effect：Various excellent properties include that machinery is special
Property such as intensity and elongation (such as Zn, Zr etc.), elevated temperature strength and creep resistance (such as Si, rare earth element, Ag etc.) and fire-retardant
Property (such as Ca etc.)；The reduction of crystalline size；With suppression hot tearing (such as Zr etc.).Specific manufacturing condition described later can be used for system
Make with the magnesium alloy for containing Al and Mn and also composition containing the second addition element with the amount in above-mentioned particular range.Equally
In this magnesium alloy, containing the compound described in specified quantitative containing Al and Mn and with specific dimensions, and these chemical combination
The particle of thing is dispersed.
The more specifically example of the composition of the magnesium alloy containing Al and Mn includes example below.
ASTM standard AM systems alloy (AM60 alloys, AM100 alloys etc.)
ASTM standard AZ systems alloy (AZ61 alloys, AZ80 alloys, AZ81 alloys, AZ91 alloys etc.)
In addition to Al and Mn, AZ systems alloy is also containing more than 0.2% and less than 1.5% Zn as the second addition unit
Element.As the Al content in AZ systems alloy increases, mechanical property such as intensity and yield strength and corrosion resistance are tended to improve.
As Al content is reduced, plastic working sexual orientation is in improvement.
Structure
One feature of the magnesium alloy in implementation method is that magnesium alloy has the ratio formed by the compound containing Al and Mn
The structure that finer uniform particle is dispersed therein.Compound containing Al and Mn is the main crystallization formed during casting
Phase.These crystalline phases have high rigidity.When Yi Dan formation crystalline phase, just it is difficult to change it during manufacturing process after casting
Size and content.Therefore, it is in the magnesium alloy of implementation method, such as above-mentioned to control using particular cast condition described later
The size and content of compound (crystalline phase).
The composition of compound
The example of the compound containing Al and Mn include intermetallic compound only containing Al and Mn and except Al and Mn it
It is outer also to contain the intermetallic compound of iron (Fe) etc..The Fe contained in the intermetallic compound of the latter is inevitable impurity.
The composition of these compounds can be by using the composition of energy dispersion X-ray analysis (EDX) or Auger electron spectroscopy (AES) point
Analysis is confirmed.
The size of compound
Compound containing Al and Mn exists as the particle in the Mg-alloy matrix in implementation method.The compound
The average grain diameter of particle is more than 0.3 μm and less than 1 μm.When average grain diameter within the above range when, the particle of the compound
The function of the dispersion-strengthened material of the structure can well be played and unlikely as the starting point of rupture so that described
The impact resistance of magnesium alloy, mechanical property and plastic working are excellent.The average grain diameter can be more than 0.3 μm and 0.9 μm
Hereinafter, particularly more than 0.35 μm and less than 0.8 μm.
Preferably, the maximum gauge of the compound containing Al and Mn is less than 2.5 μm.When more than 2.5 μm of thick particle
In the absence of when, be unlikely to occur the rupture with such thick particle as starting point, and can suppress by such thick
The deterioration of impact resistance, mechanical property and plastic working that causes of particle.It is additionally possible to suppress due to these thick grains
The reduction of the amount of minuteness particle caused by the presence of son so that appropriate minuteness particle can be contained.Therefore, the resistance to punching of magnesium alloy
Hitting property, mechanical property and plastic working can be excellent.The compound is smaller, used as the thick particle of rupture starting point
Quantity it is fewer, be more readily available the structure containing appropriate minuteness particle.Therefore, the maximum gauge is preferably less than 2 μm, more
Preferably less than 1.5 μm, more preferably still more preferably less than 1.2 μm, less than 1 μm.When the average grain of above-claimed cpd
Footpath within the above range and above-claimed cpd maximum gauge be less than 2.5 μm and preferably less than 2 μm when, above-claimed cpd
Dimensional variations are small, and size uniform.Therefore, in the form, it is also possible to suppress to be led due to the dimensional variations of above-claimed cpd
The characteristic of cause changes, and can realize good characteristic.
The content of compound
The area ratio determination that the content of the compound containing Al and Mn passes through the compound in magnesium alloy section, institute
It is more than 3.5% and less than 25% to state area ratio.When the area ratio is more than 3.5%, exist in the magnesium alloy
Enough above-claimed cpds, and can well obtain the dispersion-strengthened effect of the particle of the compound.When the area
When ratio is less than 25%, there is appropriate above-claimed cpd, it is suppressed that due in the presence of conjunction caused by excessive above-claimed cpd
Golden brittle, due to solute Al amount reduces caused corrosion resistance reduction etc. so that the impact resistance of the magnesium alloy, machinery are special
Property and plastic working are excellent.
The area ratio is determined in the following manner.The section of the magnesium alloy is obtained, selects following in the section
Field of view (for example, square area of 195 μm of 195 μ m).For the field of view, it is made up of FE-EPMA
Collection of illustrative plates, to determine the concentration distribution of Mn.It is assumed that essentially all of Mn is as the change containing Al and Mn in the field of view
Compound is present.The area ratio of the Mn in so described field of view is considered as the area ratio of the compound containing Al and Mn
Example.Specifically, the area ratio of above-claimed cpd is determined using the concentration distribution of the Mn determined by the composition collection of illustrative plates.Tool
The computational methods of body will be described below.
The magnesium alloy region that 30% depth of its thickness is extended inward into from the surface of magnesium alloy is referred to as rim surface zona
Domain, and above-mentioned field of view is selected in the surface region.The reason for selecting the field of view in the surface region be
The region for undergoing rupture with the impact for directly bearing for example to fall generally is probably the surface region.
The concentration distribution of the Mn changes according to the accelerating potential of the electron gun used in FE-EPMA.With acceleration
Voltage increases, and the information content of acquisition is tended to increase, and the concentration (level) of Mn is tended to increase.Specifically, the face
The value of product ratio can change according to the size of accelerating potential.In order to determine the area ratio, the acceleration of the electron gun
Voltage is below 15kV.
For example, work as being obtained by FE-EPMA for the field of view in the section using the electron gun accelerating potential of 15kV
During to composition collection of illustrative plates, the area ratio is more than 9.5%, more than 10% and less than 25%, particularly more than 15% and 24%
Below.
For example, work as being obtained by FE-EPMA for the field of view in the section using the electron gun accelerating potential of 5kV
During composition collection of illustrative plates, the area ratio is more than 3.5% and less than 15%, more than 4.0% and less than 12%, particularly 5.0%
Above and less than 10%.
Crystal particle diameter
In a kind of exemplary form of the magnesium alloy of implementation method, the magnesium alloy has fine crystal structure.This
One example of the structure of sample is the structure that average crystal grain diameter meets less than 10 μm.When average crystal grain diameter is less than 10 μm
When, thick crystal grain is created substantially absent, and the generation due to being ruptured caused by thick crystal grain can be reduced.Therefore, exist
In the form, impact resistance, the mechanical property such as intensity and elongation of the magnesium alloy and plastic working are more excellent.It is brilliant
Grain is smaller, can more efficiently reduce the generation due to being ruptured caused by thick crystal grain.Such as average crystal grain diameter can be 6
Below μm and particularly less than 4 μm.The lower limit of average crystal grain diameter can be such as 2 μm, and particularly 1 μm.In order to subtract
Small crystals particle diameter, the plastic working for such as being rolled after casting is effective.Magnesium alloy with micro crystal structure
Representative example includes milled sheet and by carrying out press process plate obtained from press process to the milled sheet.It is contemplated by
Increase the cooling velocity (more than 560 DEG C/sec and particularly 600 DEG C/sec more than) in casting step or add above-mentioned second and add
Element easily can further reduce crystal particle diameter.
The form being classified by manufacturing process
The concrete form of the magnesium alloy of implementation method is classified as follows by their manufacturing process.(1) founding materials.(2)
Time processing material (such as rolled stock prepared by the plastic working (time processing) such as rolled to founding materials
Material).(3) at the heat for carry out various treatment such as grinding, leveling by time processing material, carrying out to for example eliminate strain
Reason, corrosion protection treatment (chemical conversion treatment, anodized), treatment (such as diamond cut (the ダ イ ヤ カ of decorative purpose
ッ ト) and Wire Drawing (ヘ ア ラ イ Application) machining, etching, shot-peening etc.) and coating process and the treated material for preparing
Material.(4) plastic working by carrying out such as press process to time processing material or above-mentioned treated material is (secondary to add
Work) and the secondary operation material (magnesium alloy component in implementation method) of preparation.(5) surface is carried out by secondary operation material
Treatment surface-treated material (the magnesium alloy structure in implementation method that such as corrosion protection treatment, coating or decoration are processed and prepared
Part).In time processing material such as rolling stock and above-mentioned treated material, their average crystal grain diameter is less than as above institute
The average crystal grain diameter of the founding materials stated, and it is unlikely to occur rupture etc..Therefore, they are used as such as suppressing
The raw material of the secondary operation material of rapidoprint.Typically, plastic working is integrally carried out to the time processing material, and
Therefore the time processing material generally plastic working portion.The secondary operation material can be only to a part for raw material
Carry out plastic working and form the form (for example, the press process material with bending section) in plastic working portion or can be to original
Material integrally carries out the form (for example, bending to the rapidoprint of cylinder form) of plastic working.
Shape
The specific example of the magnesium alloy shape of implementation method includes that the plate with the first and second surfaces parallel to each other is (real
Apply the magnesium alloy plate of mode).First and second surface is typically plane, but can carry out for example bending and forming bent
Face.The flat shape of the plate is typically rectangle, but the plate can be so that punching press is circular or any other shape.The plate
Can be with any one in the following form classified by their above-mentioned manufacturing process：(1) founding materials, (2) once add
Work material (such as milled sheet), (3) treated material, (4) secondary operation material, and (5) surface-treated material.Described two
The specific example of the shape of secondary rapidoprint include comprising bottom and from the bottom extend side of sidewall portion and with] shape section
The component component of plate part (have).
Size
When the magnesium alloy of implementation method is for the form (magnesium alloy plate of implementation method) of plate or by least to plate
Point carry out such as press process plastic working and prepare component (magnesium alloy component of implementation method) when, the thickness of the plate
Can be below 5mm.The thickness of the plate is the average distance between described first and second surface.When plate is subjected to such as roll
When the plastic working of system, i.e. described plate are time processing material or secondary operation material, can easily make the thickness of whole plate
It is uniform and easily can further reduce thickness.In a kind of exemplary form, thickness can be about below 3mm and spy
It is not below 2.5mm.The thickness of plate is bigger, and intensity and rigidity are higher.When the thickness of plate it is small (preferably below 2mm, more preferably
Below 1.5mm, further preferred below 1.2mm) when, the time processing material and secondary operation material of thin and light matter can be formed
Material.The lower limit of the thickness of plate can be more than 0.1mm and particularly more than 0.3mm.By according to desired application purpose control
Casting condition processed, rolling condition etc., can select the thickness of plate for finally giving.It is equal in the thickness except whole plate and whole component
In form beyond even form, there may be the different part of thickness (for example, having the form of through hole and having groove or projection
Form).
Characteristic
The mechanical property of the magnesium alloy of implementation method such as intensity, yield strength and elongation is excellent.In the magnesium of implementation method
In a kind of exemplary form of alloy, meet it is following at least one：Tensile strength (room temperature) is more than 270MPa, 0.2%
Yield strength (room temperature) is more than 200MPa and elongation at break (room temperature) is more than 5%.It is preferred that meeting all three.It is such
The example of form includes being subjected to the magnesium alloy of the above-mentioned plastic working for such as rolling, and is time processing material and secondary operation
Material.When Al content be more than 5% or such as rolled plastic working when, can meet it is following at least one：Draw
Intensity is stretched for more than 280MPa and below 450MPa, 0.2% yield strength are that more than 230MPa and below 350MPa and fracture are stretched
Rate long is more than 5% and less than 15%, and can preferably meet all three.However, this depends on composition, manufacturing process
Deng.
When the magnesium alloy of implementation method bears the impact for for example falling, the magnesium alloy is unlikely recessed.For example, working as
When carrying out impact resistance experiment described later, amount of recess is small and less than 0.63mm.When the magnesium alloy of implementation method be subjected to it is above-mentioned all
Plastic working such as rolling, when being time processing material or secondary operation material, amount of recess is smaller and be below 0.6mm,
And particularly below 0.55mm.
(manufacture method of magnesium alloy)
One feature of the manufacture method of the magnesium alloy of implementation method is that methods described includes specific casting step with shape
Into following structure：The compound with specific composition, the compound i.e. containing Al and Mn are wherein contained with specific amount and is somebody's turn to do
Compound has certain size.Specifically, this casting step includes three below condition：(1) continuously casting is carried out.
(2) temperature of melt is set to than relatively low.(3) cooling velocity of melt is set to very high.Next casting step will be entered
Row is described in detail, and then the step after casting will be illustrated.
Casting step
Continuously casting
In the manufacture method of the magnesium alloy of implementation method, prepare that there is Al and the spy of Mn containing in above-mentioned particular range
The melt of the magnesium alloy of fixed composition, then carries out continuously casting.In continuously casting, rapid solidification can be carried out.Therefore, it can
The amount of oxide and the amount of segregation are reduced, and can easily reduce the formation of thick crystalline phase.Furthermore it is possible to easily
It is above-mentioned particular value by the size Control containing Al and the compound of Mn.The specific example of continuous casting process includes double roller therapy.It is double
Roller method is suitable for manufacturing cast sheet.In double roller therapy, can be by reducing the thickness (to preferred below 5mm) of cast sheet, reducing
The temperature (to preferably less than 100 DEG C) of roller, the material for changing roller etc. improve cooling velocity.
The temperature of melt
It will be more than 630 DEG C and less than 690 DEG C with the temperature of the melt before contacting dies.Lower limit is defined as above
Reason is, when the temperature of the melt is less than 630 DEG C, to be easily created the compound containing Al and Mn.It is defined as above
The reason for limit is, when temperature is higher than 690 DEG C, because the temperature of melt is too high, to cause productivity ratio step-down.By by the temperature of melt
Degree setting within the above range, can well form the compound containing Al and Mn and with appropriate during process of setting
Amount (above-mentioned specified quantitative) contains the compound.In order to be sufficiently formed above-claimed cpd, the temperature of preferably described melt is as low as possible.
The temperature of the melt is preferably less than 685 DEG C, more preferably more preferably less than 680 DEG C, less than 675 DEG C.When described
The temperature of melt is more than 635 DEG C, it is more than more than 640 DEG C and particularly 645 DEG C when, can easily suppress above-claimed cpd
Excessive formation and coarsening, and can easily control the amount and size of above-claimed cpd.Therefore, it is contemplated that life can be improved
Yield.As Al content is reduced, melting temperature is tended to raise.Control the temperature of the melt within the above range according to composition
Degree.
Before melt and contacting dies, the melt is maintained at such as calciner, Conveying Chute (transfer Gutter) and protects
In the equipment of warm stove.When the temperature of the melt described in these melt holding equipment is set to uniformly, i.e. be set to 630
During the temperature selected more than DEG C and in less than 690 DEG C of scope, temperature can be easily controlled.Because this temperature range is relative
Less than normal ranges, therefore the heat deterioration to equipment can be easily reduced, and can be with the service life of extension device.From this
Individual viewpoint considers, it is contemplated that can improve productivity ratio and reduces cost.
Cooling velocity
Above-mentioned melt with relatively low temperature is quickly cooled down under the cooling velocity more than 560 DEG C/sec.It is quick at this
In cooling, in the reservation of 630 DEG C or so within the temperature range of easily forming the compound containing Al and Mn in process of setting
Between it is very short.In such a case, it is possible to effectively suppress excessive formation and the coarsening of above-claimed cpd, and can be well
Above-claimed cpd is formed to exist with a certain amount and relatively finer structure.Cooling velocity is higher, more preferred.Cooling velocity can
Think more than 600 DEG C/sec, it is more than more than 620 DEG C/sec and particularly 650 DEG C/sec.The casting obtained by above-mentioned rapid solidification
Producing material material has following dispersion-strengthened structure, wherein the above-claimed cpd with above-mentioned specific dimensions in the founding materials extremely
It is dispersed in few surface region.In the structure shown here, the crystal is also fine.
Cooling velocity is calculated using DAS (dendritic arm spacing).The composition for making α and β be based on magnesium alloy is constant, d (μ
M) it is DAS, and V (DEG C/sec) is cooling velocity.In can be using relationship below (1)：
D=α × V-βRelational expression (1)
For example, in ASTM standard AZ systems alloy, the α in relation above formula (1) is 35.5, and β=0.31.DAS by
dAZRepresent, cooling velocity VAZIt is expressed as follows：
dAZ=35.5 × VAZ -0.31。
The pass between DAS and cooling velocity is predefined using the test specimen of different compositions and size (thickness, width etc.)
System, and make correlation data.In the way of to obtain desired cooling velocity cooling bar is controlled using this correlation data
During part, good machinability is obtained.
Realizing the example of the method for more than 560 DEG C/sec of cooling velocity includes following method.(1) surface of mould is reduced
Temperature (for example, be reduced to less than 100 DEG C and particularly 80 DEG C below).For example, using pressure cooling mould such as water cooling mold.
In such a case, it is possible to maintain the low surface temperature of the mould.(2) size of founding materials is reduced.For example, when casting material
Expect during for cast sheet, its thickness is below 5mm, below 4.5mm and particularly below 4mm.(3) using by high cooling capacity
Material formed mould.For example, when using the mould formed by the material of high heat conductance, because the exothermicity of mould is high
And cooling velocity can be improved.
Preferably, casting step (including cooling step) is carried out in inert gas atmosphere to prevent the oxygen of such as magnesium alloy
Change.
Step after casting
Milling step
When the magnesium alloy of implementation method forms rolling stock (being typically milled sheet), to above-mentioned founding materials (allusion quotation
Type ground is cast sheet) carry out at least a time rolling.Specifically, a kind of example of the manufacture method of the magnesium alloy of implementation method
Property form include that above-mentioned casting step and the founding materials to being obtained by continuously casting carry out the step of at least a time rolling
Suddenly (milling step is properly termed as below the step).Preferably, described at least a time rolling is more than 200 DEG C and 400
The temperature and pressure under rolling temperature below DEG C.In can properly selecting milling step in the way of the milled sheet for obtaining expectation thickness
Road number of times, every time reduction ratio, total reduction etc..Rolled by the founding materials, rolled structure can be obtained
(being typically recrystallization texture) is rather than cast structure.Due to the rolling, it is contemplated that have the following effects.(1) it is readily available
Average crystal grain diameter is the fine structure below less than 20 μm and particularly 10 μm.(2) can reduce during casting such as
The appearance of the internal flaw and surface defect of segregation, shrinkage cavity and hole.(3) formation of fine recrystallization texture easily makes intensity
It is further improved with corrosion resistance.The milled sheet obtained by the rolling step has following dispersion-strengthened structure, its
In at least its surface region there is trickleer crystal structure and containing Al and Mn and with the chemical combination of above-mentioned specific dimensions
Thing is dispersed.After the milling step, the manufacture method can also include carrying out it is for example following in it is at least one attached
Plus the step of processing：Above-mentioned grinding, leveling, corrosion protection treatment, coating, the processing of decorative purpose and in order to for example eliminate strain
And the heat treatment for carrying out.
Secondary operation step
When the magnesium alloy of implementation method is processed to plastic working component, to the rolling plate, (it can be already subjected to
Such as grinding or the additional processing of leveling) at least a portion carry out plastic working.Specifically, the magnesium alloy of implementation method
Manufacture method a kind of exemplary form include above-mentioned casting step, the rolling step and to be subjected to it is described rolling step
The step of at least a portion of rapid raw material carries out plastic working (secondary operation).
The specific example of plastic working (secondary operation) includes press process (deep draw, punching press, upsetting etc.), forging processing
And bending machining.The plasticity is carried out preferably as the warm working more than 200 DEG C and under less than 280 DEG C of processing temperature
Processing.Because because the plastic working of raw material (being typically the rolling plate) is improved, therefore can be with
Accurately carry out plastic working (secondary operation).In the case of warm working, it is possible to reduce thick in the structure of raw material
The amount of recrystallization texture so that the deterioration of mechanical property and corrosion resistance can be reduced.Part that can be only to raw material or
Overall raw material are carried out with plastic working (secondary operation).After secondary operation step, the manufacture method can also include into
The step of at least one additional processing during row is for example following：Above-mentioned grinding, corrosion protection treatment, coating, the processing of decorative purpose,
With the heat treatment carried out to for example eliminate strain.
The magnesium alloy and its manufacture method of implementation method will be further illustrated by test example.
[test example 1]
What is shown in table 1 is used for magnesium alloy in manufacturing magnesium alloy plate under various conditions with different compositions, and to this
A little magnesium alloy plates carry out press process to make press process material.To the various magnesium alloy plates for obtaining, carry out structure observation, draw
Stretch experiment (normal temperature), impact resistance experiment (normal temperature), the confirmation of press processability quality and the judgement of productivity ratio quality.
Each element content is represented by mass percent (quality %).
The AZ91 shown in table 1 is the magnesium alloy of Al, Mn and Zn containing the amount suitable with ASTM standard AZ91 alloys.
The alloy contains 9.1% Al, the Zn of 0.16% Mn and 0.72%.
In table 1 show AZX911 be Al, Mn and Zn containing the amount suitable with ASTM standard AZ91 alloys and also
Magnesium alloy containing Ca.The alloy contains 9.0% Al, 0.16% Mn, the Ca of 0.74% Zn and 1.0%.
The AZ61 shown in table 1 is the magnesium alloy of Al, Mn and Zn containing the amount suitable with ASTM standard AZ61 alloys.
The alloy contains 6.1% Al, the Zn of 0.22% Mn and 0.70%.
The AM60 shown in table 1 is the magnesium alloy of Al and Mn containing the amount suitable with ASTM standard AM60 alloys.Institute
State alloy and contain 6.2% Al and 0.20% Mn.
In the present embodiment, using the manufacturing process of twin-roll continuous casting, rolling and press process is included successively, manufacture
Cast sheet (magnesium alloy plate), milled sheet (magnesium alloy plate) and press process material (magnesium alloy component).Specifically, in indifferent gas
To be melted with a kind of magnesium alloy ingot of the composition shown in table 1 in atmosphere, prepare the melt of the alloy.Will connect with mould
The temperature (hereinafter referred to as molten alloy temperature, DEG C) of the melt before touching is shown in Table 1.In this case, using comprising molten
The equipment for solving stove, the holding furnace of holding melt and melt being transported to the supply unit (a pair of rolls) of mould from holding furnace, and
Using the temperature of the melt in supply unit as " molten alloy temperature ".The temperature of the melt in supply unit is equipment
Design temperature.The melt is set to be contacted with mould (roller) and thus solidified, so as to make the cast sheet that thickness is 5.0mm.
Cooling velocity (DEG C/sec) in casting step is shown in Table 1.In sample number 1-1 to 1-5,1-101 and 1-201,
Change cooling velocity by controlling temperature, the peripheral speed of roller, the casting speed etc. of roller.In sample number 1-1 to 1-5 and 1-101,
Using water cooling mold, and by cause roll temperature be below 100 DEG C in the way of roller is cooled down while cast.
Each cast sheet to obtaining carries out multi-pass temperature and pressure, so as to make the milled sheet that thickness is 0.7mm.The condition of temperature and pressure
For rolling temperature be more than 200 DEG C and less than 400 DEG C, every time reduction ratio be more than 5% and less than 20% and total reduction be
86%.
The piece of 200mm × 30mm is cut into each milled sheet that will be obtained, and by the section as compacting raw material.It is right
The raw material carry out press process (square cup deep-drawing (Jiao Twisted り processing)), thus make with [shape section and comprising top and
The press process material of the leg extended from the top.Pressing conditions is that heating-up temperature is 250 DEG C, and connect the top and
The angle R of leg is 2mm.
After the continuously casting, can enter to exercise the heat treatment (solution treatment) of even structure or old to each cast sheet
Change treatment, rolled during intermediate heat-treatment or the finished heat treatment after finally being rolled.Milled sheet can be carried out
Leveling with improve flatness or can be ground with further make surface smooth.
Structure observation
The milled sheet of the following each sample to obtaining carries out metallographic observation.Along parallel with the thickness direction of each milled sheet
Cut to obtain section (longitudinal section) in face of each milled sheet.This section is prepared using commercially available Cross section polishing machine (CP)
CP sections.In the CP sections, by the region of extend to plate thickness from the surface of plate in a thickness direction 30% depth
As surface region (0.7mm × 0.3=0.21mm in this case), and any selection observation in the surface region
The visual field.Fig. 1's carries out what SEM observations were obtained upper drawing shows the field of view by being selected in the milled sheet to sample number 1-1
Secondary electron image, bottom panel show by carrying out the bianry image that binaryzation is obtained to the secondary electron image.Fig. 2 is logical
Crossing carries out the backscattered electron image that SEM observations are obtained to the field of view selected.
Be can be seen that from the upper figure of Fig. 1 and disperseed many big and small particles in fine crystal structure.It is specific and
Speech, finds exist with the larger particle (maximum length of the ratio of light grey display：About 0.1 μm to about 1 μm) and with white displays
Smaller particle.Constituent analysis is carried out to these particles.It was found that being the change containing Al and Mg than larger particle (light gray)
Compound (β phases, mainly precipitate), and it was found that the particle (white) smaller than the β phases is the compound containing Al and Mn
(Al-Mn crystalline phases).For ease of understanding the existence of white particles, contrast is changed as shown in figure below of Fig. 1.Can see
Go out, white particles are dispersed in the crystal structure.It is also seen that, although white particles are smaller than β phases and leucoplastid
The amount of son is fewer than the amount of β phases, but there are a certain amount of white particles.This can also be as can be seen from Figure 2.The SEM back ofs the body shown in figure 2
It can also be seen that there are light gray colored particle and white particles in scattered electron image.Although white particles are smaller than light gray colored particle
And the amount of white particles is fewer than the amount of light gray colored particle, but there are a certain amount of white particles.Consequently found that, in sample number 1-
In 1 milled sheet, there is a certain amount of compound (Al-Mn crystalline phases) containing Al and Mn, although the chemical combination containing Al and Mn
Thing is smaller and their amount is fewer.It has also been found that these compounds are dispersed.The rolling of sample number 1-2 to 1-5
Plate has milled sheet identical structure with sample number 1-1, i.e., with smaller Al-Mn crystalline phases with a certain amount of presence and
Equally distributed fine crystal structure.
In the milled sheet of sample number 1-101, the amount of the compound (Al-Mn crystalline phases) containing Al and Mn is considerably less.
In the milled sheet of sample number 1-201, although the amount of the compound containing Al and Mn is considerably less, but there is thick particle.
For the milled sheet of each sample, average crystal grain diameter is determined using the image observed under an optical microscope.
Result is shown in Table 1.According to " micrographic test method JIS G0551 (2005) of steel-apparent particle size, uses linear test line
Intercept method " determine average crystal grain diameter.The straight line parallel with the thickness direction of milled sheet is drawn in the image observed, will
The line segment intersected with crystal grain is used as particle diameter.The average crystal grain diameter of the milled sheet of sample number 1-1 to 1-5 is less than 10 μm.This table
Crystal grain in each milled sheet of bright sample number 1-1 to 1-5 is fine.
The milled sheet of each sample for obtaining, in extraction SEM image (from the bianry image of secondary electron image conversion)
Above-mentioned white particles understand the Al-Mn crystalline phases of the extraction as the compound (Al-Mn crystalline phases) containing Al and Mn
Particle average grain diameter (μm) and maximum gauge (μm).Result is shown in Table 1.The grain of the Al-Mn crystalline phases is identified below
The particle diameter of son.It is determined that with the particle of extraction diameter of a circle of the same area.By field of view (in above-mentioned surface region
The square area of 195 μm of 195 μ m of middle selection) present in all particles diameter average value as Al-Mn crystallize
The average grain diameter of phase.Using the maximum among the diameter of all particles as Al-Mn crystalline phases maximum gauge.
The milled sheet of each sample for obtaining, the field of view for being selected in the CP sections is made through FE-
The composition collection of illustrative plates that EPMA is obtained, so as to understand the concentration distribution of Mn.Accelerate electricity with different electron guns under two kinds of different conditions
The concentration of pressure analysis Mn.These conditions are as follows.
(1) accelerating potential of electron gun：15kV, irradiates electric current：100nA, minute：50 milliseconds, determine element：Mn
(LiFH) area, is determined：The square area of 195 195 μm of μ ms
(2) accelerating potential of electron gun：5kV, irradiates electric current：100nA, minute：500 milliseconds, determine element：Mn
(TAPH) area, is determined：The square area of 24 24 μm of μ ms
In the less condition of accelerating potential (2), the measure area in area less-than condition (1) is determined.However, true
Recognize, even if when the measure area in condition (2) is identical with condition (1), also not finding the measurement result (concentration of Mn point
Cloth) significant difference.
Fig. 3 show accelerating potential for 15kV condition (1) under, the FE-EPMA groups of Mn in the milled sheet of sample number 1-1
Into collection of illustrative plates.Colour code shows on the right side of Fig. 3.In this composition collection of illustrative plates, the concentration of Mn is by from white, pink, red, orange
Color, yellow, green, light blue, the blue aberration to black change are represented.Color close to white means that the concentration of Mn is high,
Connecing pullous color means that the concentration of Mn is low.In figure 3, it is by the level set of the Mn at the point of the maximum concentration of Mn
135, and be 0 by the level set of the Mn at the point without Mn.Then the Mn concentration at each point is by the value table relative to level 135
Show.The percentage of each level is expressed as area ratio (area %).As shown in the composition collection of illustrative plates of Fig. 3, deposited in black background
In the region being much made up of to blue granular cluster red.By red to blue granular area described in the composition collection of illustrative plates by Fig. 3
The existence position in domain (is joined with the existence position of the white particles in SEM image (backscattered electron image) in identical field of view
According to Fig. 2) compare, it is found that the red in the composition collection of illustrative plates is included in the compound containing Al and Mn to blue granular region
In (Al-Mn crystalline phases).This is it can be shown that the Mn in the milled sheet of sample number 1-1 exists as Al-Mn crystalline phases.Therefore, exist
In this case, the whole Mn that there will be are regarded as the compound with Al.
Fig. 4 is the level (number that Mn is counted) of the Mn made using the composition collection of illustrative plates (15kV) of the Mn shown in Fig. 3
The figure of frequency and cumulative frequency.In the figure of Fig. 4, transverse axis represents the level (110 level is shown in 0 to 135, Fig. 4) of Mn.
The left longitudinal axis represents the frequency of the level of Mn, and the right longitudinal axis represents the cumulative frequency (%) of the level of Mn.
The cumulative frequency of the level of each Mn is equivalent to the area ratio (area %) of the level.Calculate Mn level it is average
SLevelAnd findAnd it was found that the total concentration of Mn is very low.Therefore, when the level of Mn is about into average SLevelArea
When domain is regarded as noise, may be more suitable for extracting Mn.Specifically, may be more suitable for extracting the compound (Al-Mn containing Al and Mn
Crystalline phase).Determine the standard deviation of the level of MnLevel.Then by average SLevel+3σLevelAs threshold value, and level by Mn etc.
In or more than average SLevel+3σLevelRegion be regarded as the Al-Mn crystalline phases.Level is equal to or more than average SLevel+3σLevel(
In this case the area ratio (%, 15kV) of the Al-Mn crystalline phases is regarded as the cumulative frequency of part 11.3).As a result
It is shown in Table 1.
The left figure of Fig. 5 show when use accelerating potential for 5kV condition (2) when, the Mn in the milled sheet of sample number 1-1
FE-EPMA composition collection of illustrative plates, and right figure shows the SEM image (backscattered electron image) in identical field of view.Together
In the composition collection of illustrative plates of Fig. 5, as Fig. 3, the concentration of Mn is represented sample by aberration.In the composition collection of illustrative plates of Fig. 5, by Mn's
The level set of the Mn at the point of maximum concentration is 55, and is 0 by the level set of the Mn at the point without Mn.The hundred of each level
Divide than being represented by area ratio (area %).In the composition collection of illustrative plates of the left figure of Fig. 5, the irradiation energy of electron gun is than condition (1)
Irradiation energy it is small, and the information content on Mn is than few under condition (1), therefore the maximum horizontal of Mn is small, i.e., 55.So
And, as shown in Figure 5 in the left, it can be observed that the aberration of Mn, and as in the composition collection of illustrative plates of Fig. 3, exist red to indigo plant
The granular cluster of color.By the red existence position to blue granular region in the composition collection of illustrative plates by Fig. 5 left figures and Fig. 5 right figures
The existence position of white particles compares in SEM image (backscattered electron image), finds the red constituted in collection of illustrative plates extremely
Blue granular region is the compound (Al-Mn crystalline phases) containing Al and Mn.
Fig. 6 is the level (number that Mn is counted) of the Mn of composition collection of illustrative plates (5kV) making of the Mn shown using Fig. 5 left figures
The figure of frequency and cumulative frequency.In the figure of Fig. 6, with the figure of Fig. 4 in, transverse axis represent Mn level (in 0 to 55, Fig. 6 show
Show 50 level).The left longitudinal axis represents the frequency of the level of Mn, and the right longitudinal axis represents the cumulative frequency (%) of the level of Mn.Equally
In this case, the average S of the level of Mn is determinedLevelAnd standard deviationLevel.Then by average SLevel+3σLevelAs threshold value, will
Level is equal to or more than average SLevel+3σLevelThe cumulative frequency (%) of the part of (being in this case 12) is defined as containing Al
With the area ratio (%, 5kV) of the compound (Al-Mn crystalline phases) of Mn.Result is shown in Table 1.
To each press process material of sample number 1-1 to 1-5, do not bent substantially with being observed with milled sheet identical mode
Deng top structure.It was found that top it is same with milled sheet have fine fine crystal structure, and containing Al with
The compound (Al-Mn crystalline phases) of Mn is dispersed in the structure.At the top, average crystal grain diameter, above-claimed cpd
Average grain diameter, their maximum gauge and their area ratio are the value with milled sheet equal extent.It is therefore contemplated that top has
There is the structure substantially the same with milled sheet.
Each cast sheet for sample number 1-1 to 1-5, structure is observed with milled sheet identical mode.Though it was found that
The crystal grain of the crystal grain more than milled sheet of right cast sheet, but cast sheet has fine crystal structure.Equally in sample number 1-1 to 1-
In 5 cast sheet, it is found that at least their surface region has the dispersed structure of the compound containing Al and Mn.Understand
The average grain diameter of above-claimed cpd, their maximum gauge and their area ratio (15kV and 5kV) and find be with
The value of milled sheet equal extent.During this shows in the milled sheet of sample number 1-1 to 1-5 substantially to maintain and is present in cast sheet
Above-claimed cpd.
Tension test (normal temperature, about 20 DEG C)
Use the milled sheet (thickness of the sample for obtaining：0.7mm) make JIS 13B tabulars test films (JIS Z 2201
), and the Tensile Testing Method of Metallic Materials in JIS Z 2241 (1998) carries out tension test (gauge length GL (1998)
=50mm).Tensile strength (MPa), 0.2% yield strength (MPa) and the elongation at break (%) for determining each test specimen (evaluate secondary
Number：N=1 under all situations).Result is shown in Table 2.
(room temperature, about 20 DEG C) is tested in impact resistance
From the milled sheet (thickness of the sample for obtaining：0.7mm) cut out the plate-like tile of 30mm × 30mm, and the plate that will be cut out
Shape piece is used as test film.In this experiment, as shown in fig. 7, preparing the branch of the circular hole 21 with diameter d=20mm in the horizontal plane
Hold platform 20.The depth of circular hole 21 is set in the way of cylindrical rod described later 10 is adequately inserted in circular hole 21.Place examination
Piece 1 is tested to close circular hole 21.While this state is maintained, to cause the central shaft of cylindrical rod 10 and the center of circular hole 21
The coaxial mode of axle is that the ceramic rounding post that weight is 100g and front end r=5mm is placed at 200mm in the height away from test film 1
Rod 10.Then cylindrical rod 10 is made freely to be fallen towards test film 1 from set-point (at height 200mm), and determination test piece 1 is recessed
Fall into amount.It is following to determine amount of recess (mm).The straight line on the relative both sides of joint test piece 1 is drawn, and is surveyed using point micrometer
The fixed straight line and most the distance between sunk part.Result is shown in Table 2.
Machinability
The press process material (being subjected to the material of square cup deep-drawing) of each sample for obtaining, range estimation confirms fillet part
With the presence or absence of rupture.Press process material without rupture is rated as " good ", and the press process material for having rupture is rated as
" poor ".Result is shown in Table 2.
Productivity ratio
When the temperature of melt in casting step is less than 690 DEG C, productivity ratio is assessed as " good ".
[table 1]
[table 2]
As shown in table 1, in various kinds Article Number 1-1 to 1-5, the average grain diameter of the particle of the compound containing Al and Mn is
More than 0.3 μm and less than 1 μm, and the particle of the compound obtained by FE-EPMA area ratio for more than 3.5% and
Less than 25%.In sample number 1-1 to 1-5, their intensity, yield strength, elongation and plastic working with containing very
The sample number 1-101 of a small amount of above-claimed cpd is equal extent.It was found that how sample number 1-1 to 1-5 is respectively provided with no matter constituting
High intensity and high tenacity and plastic working is excellent.According to above-mentioned experiment, the respective tensile strengths of sample number 1-1 to 1-5 are
More than 300MPa, their 0.2% yield strength is more than 230MPa, and their elongation at break is more than 6%.This shows,
Even if when press process such as square cup deep-drawing is carried out to these sample numbers 1-1 to 1-5, being also unlikely to occur fracture and rupturing.
In sample number 1-1 to 1-5, the area ratio of the area ratio more than sample number 1-101 of the particle of the compound, and it is recessed
The amount of falling into is below 0.5mm, therefore impact resistance is good than sample number 1-101.The impact resistance as described above of sample number 1-1 to 1-5
One of the reason for property, mechanical property and excellent plastic working is probably following reason.Although there is a certain amount of above-mentioned chemical combination
Thing, but the compound is finer.Therefore, dispersion-strengthened effect is 1. obtained well, and 2. above-claimed cpds are unlikely
As the starting point of rupture etc..
It is also following to find for sample number 1-1 to 1-5.
The maximum gauge of above-claimed cpd is less than 1.2 μm.This causes effectively to suppress broken with above-claimed cpd as starting point
The generation split etc..
The crystal is also fine, and average crystal grain diameter is less than 10 μm.This also causes effectively to suppress with thick
Crystal grain be the generation of the rupture etc. of starting point.This is probably to realize excellent impact resistance, mechanical property and plastic working
Reason.
Because the temperature of the melt during continuously casting is than relatively low, therefore the heat deterioration of equipment can be suppressed.Therefore, realize
High production rate.
From above-mentioned experiment can be seen that no matter for FE-EPMA analysis electron gun accelerating potential be 5kV or
15kV, the area ratio of the compound containing Al and Mn in various kinds Article Number 1-1 to 1-5 is above in various kinds Article Number 1-101
With the area ratio of 1-201.It was found that there is enough compounds containing Al and Mn.
In this experiment, when accelerating potential is 5kV, the area ratio of sample number 1-1 to 1-5 for more than 5% and
Higher than the area ratio of sample number 1-101 and 1-201.The area ratio of sample number 1-101 and 1-201 is less than 3.5%.
In this experiment, when accelerating potential is 15kV, the area ratio of sample number 1-1 to 1-5 for more than 10% simultaneously
And higher than the area ratio of sample number 1-101 and 1-201.The area ratio of sample number 1-101 and 1-201 is less than 9.4%.
It was found that as described above by will will be set to than relatively low i.e. 630 DEG C with the temperature of the melt before contacting dies
Above and less than 690 DEG C, melt is quickly then cooled down with more than 560 DEG C/sec of cooling velocity, impact resistance, machine can be manufactured
Tool characteristic, the magnesium alloy that plastic working is excellent and productivity ratio is also excellent.As long as be can be seen that with above-mentioned specific from above-mentioned experiment
Amount is comprising the compound containing Al and Mn and the compound containing Al and Mn has specific average grain diameter, even if then working as
When composition changes, it is also possible to manufactured with high production rate and had by controlling the temperature and its cooling velocity of melt within the above range
There is the magnesium alloy of impact resistance, mechanical property and plastic working.
In sample number 1-201, although melt temperature is very high, but cooling velocity is very slow, i.e., less than 550 DEG C/sec.Hair
In present sample number 1-201, although the amount of the compound containing Al and Mn is fewer than the amount in sample number 1-1, but exists thick
Particle (more than 2.5 μm).In sample number 1-201, its impact resistance, mechanical property and plastic working ratio have and sample number
The difference of the sample number 1-1 of 1-201 identicals composition.The reason for these results is probably easily to be formed and grown during solidifying
Residence time within the temperature range of 630 DEG C or so of above-claimed cpd is long.Due to the growth of the particle of the compound, formed
Thick particle and the thick particle as rupture starting point, and the dispersion-strengthened effect of the fine compound becomes
Obtain not enough.This is probably the reason for impact resistance, mechanical property and plastic working are deteriorated.
In sample number 1-101, melt temperature is high, and cooling velocity is also high.Therefore, compound containing Al and Mn
Amount is considerably less.In sample number 1-101, particularly difference of the impact resistance than the sample number 1-1 with same composition.This is probably
Because the dispersion-strengthened deficiency of the fine compound.
Each press process material for sample number 1-1 to 1-5, the experiment similar to the milled sheet is made from top
Piece, and carry out testing (room temperature) with the identical tension test (room temperature) and identical impact resistance for carrying out the milled sheet.
Result is substantially identical with the milled sheet.Therefore, the impact resistance and mechanical property of the press process material are also excellent
Different.In this regard, at least a portion that one of reason is probably press process material substantially maintains the structure of milled sheet, that is, press
At least a portion of rapidoprint processed has fine crystal structure and the compound containing Al and Mn and with specific dimensions
It is dispersed in the structure shown here.
The invention is not restricted to above-described embodiment.The present invention is limited by the scope of claim and is intended to be included in right will
Any variant in implication being equal in the range of asking and with the scope of claim.For example, in above-mentioned test example, composition
The shape and size (thickness, length, width etc.) of (species and its content of addition element), magnesium alloy plate, manufacturing condition (casting
Mould specification, mold temperature, molten alloy temperature, cooling velocity, casting plate thickness in condition etc.) can suitably change.
Industrial applicability
Magnesium alloy of the invention and magnesium alloy plate can be preferably used as undergoing various plastic workings such as press process, bending and
The raw material of the plastic working component (magnesium alloy component) of forging.Especially, the magnesium alloy plate can be preferably used as expecting tool
There are the raw material of the such as component of lightweight, minimal thickness, high intensity and damping capacity characteristic, the example of such component includes：It is all
Such as various electric/electronic devices (PC (PC), panel computer, portable phone such as smart phone and folding-type portable electricity
Words, digital camera etc.) housing and lid external member；The structural elements and composition structure of transporting equipment such as automobile and aircraft
Part；Sack；With various shields.Magnesium alloy of the invention and magnesium alloy component can be preferred for such as said external component such as shell
Body, the structural elements of transporting equipment and member of formation, sack and shield.The manufacture method of magnesium alloy of the invention can be used preferably
In the magnesium alloy for manufacturing all such as above-mentioned magnesium alloy plate and above-mentioned magnesium alloy component.
Label declaration
The circular hole of 1 test film, 10 cylindrical rod, 20 support table 21
Claims (6)
1. a kind of magnesium alloy, it includes in terms of quality % more than 1% and less than 12% Al and more than 0.1% and less than 5%
Mn,
Wherein described magnesium alloy has the structure that the particle of the compound containing Al and Mn is dispersed therein,
The average grain diameter of the particle of the compound is more than 0.3 μm and less than 1 μm, and
The area ratio of the particle of the compound is more than 3.5% and less than 25%.
2. magnesium alloy according to claim 1, wherein,
The maximum gauge of the particle of the compound is less than 2.5 μm.
3. magnesium alloy according to claim 1 and 2, wherein,
The average crystal grain diameter of the magnesium alloy is less than 10 μm.
4. a kind of magnesium alloy plate, its magnesium alloy as any one of claims 1 to 3 is formed.
5. a kind of magnesium alloy component, its magnesium alloy as any one of claims 1 to 3 is formed, and the magnesium alloy
Component has the plastic working portion for being subjected to plastic working in its at least a portion.
6. a kind of manufacture method of magnesium alloy, methods described includes the step of carrying out continuously casting to the melt of magnesium alloy, described
Magnesium alloy contains in terms of quality % more than 1% and less than 12% Al and more than 0.1% and less than 5% Mn,
Wherein will with the temperature of the melt before contacting dies be more than 630 DEG C and less than 690 DEG C, and
The cooling velocity of the melt is more than 560 DEG C/sec.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-211259 | 2014-10-15 | ||
| JP2014211259A JP6465338B2 (en) | 2014-10-15 | 2014-10-15 | Magnesium alloy, magnesium alloy plate, magnesium alloy member, and method for producing magnesium alloy |
| PCT/JP2015/076885 WO2016059950A1 (en) | 2014-10-15 | 2015-09-24 | Magnesium alloy, magnesium alloy plate, magnesium alloy member, and method for producing magnesium alloy |
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| Publication Number | Publication Date |
|---|---|
| CN106715736A true CN106715736A (en) | 2017-05-24 |
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| CN201580049782.0A Pending CN106715736A (en) | 2014-10-15 | 2015-09-24 | Magnesium alloy, magnesium alloy plate, magnesium alloy member, and method for producing magnesium alloy |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20170283915A1 (en) |
| EP (1) | EP3208356B1 (en) |
| JP (1) | JP6465338B2 (en) |
| KR (1) | KR20170068431A (en) |
| CN (1) | CN106715736A (en) |
| WO (1) | WO2016059950A1 (en) |
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|---|---|---|---|---|
| CN111455243A (en) * | 2020-05-21 | 2020-07-28 | 东北大学 | Mg-Ca-Mn-Al-Zn series wrought magnesium alloy with high Mn content and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6649665B2 (en) * | 2015-10-19 | 2020-02-19 | 権田金属工業株式会社 | Magnesium alloy manufacturing method, rolled magnesium alloy material, and magnesium alloy compact |
| JP6760584B2 (en) * | 2016-06-24 | 2020-09-23 | 不二ライトメタル株式会社 | Extruded member of magnesium alloy |
| KR101889018B1 (en) | 2016-12-23 | 2018-09-20 | 주식회사 포스코 | Magnesium alloy sheet and method for manufacturing the same |
| JP2019174781A (en) * | 2017-08-24 | 2019-10-10 | キヤノン株式会社 | Catoptric element and stereo camera device |
| CN114994815A (en) * | 2017-08-24 | 2022-09-02 | 佳能株式会社 | Reflective optical element and stereoscopic camera device |
| JP6852186B2 (en) * | 2017-11-17 | 2021-03-31 | 住友電気工業株式会社 | Magnesium alloy and magnesium alloy members |
| KR102043786B1 (en) | 2017-12-26 | 2019-11-12 | 주식회사 포스코 | Magnesium alloy sheet and method for manufacturing the same |
| US20220001653A1 (en) * | 2019-03-22 | 2022-01-06 | Hewlett-Packard Development Company, L.P. | Covers for electronic devices |
| CN114908278A (en) * | 2021-02-08 | 2022-08-16 | 通用汽车环球科技运作有限责任公司 | Magnesium alloy and forged component |
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| JP2010156007A (en) * | 2008-12-26 | 2010-07-15 | Mitsubishi Alum Co Ltd | Magnesium-alloy sheet excellent in corrosion resistance and surface treatability, and method for producing the same |
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| JP2011006754A (en) * | 2009-06-26 | 2011-01-13 | Sumitomo Electric Ind Ltd | Magnesium alloy sheet |
| JP5648885B2 (en) * | 2009-07-07 | 2015-01-07 | 住友電気工業株式会社 | Magnesium alloy plate, magnesium alloy member, and method for producing magnesium alloy plate |
| JP5522400B2 (en) * | 2009-12-11 | 2014-06-18 | 住友電気工業株式会社 | Magnesium alloy material |
| JP2012077320A (en) * | 2010-09-30 | 2012-04-19 | Mitsubishi Alum Co Ltd | Magnesium alloy sheet material for bending and method for producing the same, and magnesium alloy pipe and method for producing the same |
| CN103210102B (en) * | 2010-11-16 | 2015-11-25 | 住友电气工业株式会社 | Magnesium alloy plate and manufacture method thereof |
| JP5522000B2 (en) * | 2010-11-22 | 2014-06-18 | 住友電気工業株式会社 | Magnesium alloy parts |
| JP5880811B2 (en) * | 2011-06-22 | 2016-03-09 | 住友電気工業株式会社 | Magnesium alloy cast material, magnesium alloy cast coil material, magnesium alloy wrought material, magnesium alloy joint material, method for producing magnesium alloy cast material, method for producing magnesium alloy wrought material, and method for producing magnesium alloy member |
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2014
- 2014-10-15 JP JP2014211259A patent/JP6465338B2/en not_active Expired - Fee Related
-
2015
- 2015-09-24 KR KR1020177004623A patent/KR20170068431A/en not_active Application Discontinuation
- 2015-09-24 EP EP15851242.6A patent/EP3208356B1/en not_active Not-in-force
- 2015-09-24 US US15/506,622 patent/US20170283915A1/en not_active Abandoned
- 2015-09-24 CN CN201580049782.0A patent/CN106715736A/en active Pending
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| CN101961779A (en) * | 2004-06-30 | 2011-02-02 | 住友电气工业株式会社 | The manufacture method of magnesium alloy materials |
| WO2009096622A1 (en) * | 2008-01-30 | 2009-08-06 | Postech Academy-Industry Foundation | Magnesium alloy panel having high strength and manufacturing method thereof |
| JP2010156007A (en) * | 2008-12-26 | 2010-07-15 | Mitsubishi Alum Co Ltd | Magnesium-alloy sheet excellent in corrosion resistance and surface treatability, and method for producing the same |
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| EP3208356B1 (en) | 2018-10-24 |
| KR20170068431A (en) | 2017-06-19 |
| JP6465338B2 (en) | 2019-02-06 |
| US20170283915A1 (en) | 2017-10-05 |
| WO2016059950A1 (en) | 2016-04-21 |
| EP3208356A1 (en) | 2017-08-23 |
| EP3208356A4 (en) | 2017-11-08 |
| JP2016079451A (en) | 2016-05-16 |
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Application publication date: 20170524 |