CN102803533A - Magnesium alloy plate - Google Patents
Magnesium alloy plate Download PDFInfo
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- CN102803533A CN102803533A CN2010800280746A CN201080028074A CN102803533A CN 102803533 A CN102803533 A CN 102803533A CN 2010800280746 A CN2010800280746 A CN 2010800280746A CN 201080028074 A CN201080028074 A CN 201080028074A CN 102803533 A CN102803533 A CN 102803533A
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- magnesiumalloy
- magnesium alloy
- alloy
- crystallization phases
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- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 101
- 239000002245 particle Substances 0.000 claims abstract description 23
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 16
- 238000002425 crystallisation Methods 0.000 claims description 63
- 230000008025 crystallization Effects 0.000 claims description 63
- 229910045601 alloy Inorganic materials 0.000 claims description 59
- 239000000956 alloy Substances 0.000 claims description 59
- 238000000034 method Methods 0.000 claims description 32
- 238000005266 casting Methods 0.000 claims description 25
- 238000003490 calendering Methods 0.000 claims description 20
- 238000009749 continuous casting Methods 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 claims description 8
- 229910052684 Cerium Inorganic materials 0.000 claims description 4
- 229910052727 yttrium Inorganic materials 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 229910052712 strontium Inorganic materials 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000012360 testing method Methods 0.000 description 40
- 239000000463 material Substances 0.000 description 27
- 239000000203 mixture Substances 0.000 description 9
- 229910018131 Al-Mn Inorganic materials 0.000 description 8
- 229910018461 Al—Mn Inorganic materials 0.000 description 8
- 230000035939 shock Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 230000003628 erosive effect Effects 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 238000007669 thermal treatment Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 238000007712 rapid solidification Methods 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 229910018137 Al-Zn Inorganic materials 0.000 description 2
- 229910018573 Al—Zn Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910003023 Mg-Al Inorganic materials 0.000 description 1
- 238000002083 X-ray spectrum Methods 0.000 description 1
- 229910000905 alloy phase Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000012764 semi-quantitative analysis Methods 0.000 description 1
- 238000010129 solution processing Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
-
- 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
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Metal Rolling (AREA)
- Continuous Casting (AREA)
Abstract
Disclosed is a magnesium alloy plate which has excellent impact resistance at low temperatures. Also disclosed are a magnesium alloy member using the magnesium alloy plate, and a method for producing a magnesium alloy plate. The magnesium alloy plate is configured from a magnesium alloy that contains Al and Mn. When a region from the surface to the 30% of the magnesium alloy plate in the thickness direction is defined as a surface region and an arbitrary small portion of 50 [mu]m2 is taken out of the surface region, the number of crystallized particles containing both Al and Mn is 15 or less. Each of the crystallized particles has a maximum particle diameter of 0.1-1 [mu]m (inclusive), and a mass ratio of Al to Mn, namely Al:Mn of 2-5 (inclusive). The magnesium alloy plate has excellent impact resistance, since the crystallized particles contained in the magnesium alloy plate are small in number and size and thus the magnesium alloy plate exhibits excellent mechanical characteristics even in a low-temperature environment, said crystallized particles being a cause of cracks.
Description
Technical field
The present invention relates to be suitable as the magnesiumalloy sheet of the material that is used for housing and various parts, the magnesium alloy component that uses said alloy slice and the method that is used to make the magnesiumalloy sheet.Especially, the present invention relates to have at low temperatures the magnesiumalloy sheet and the magnesium alloy component of high-impact.
Background technology
More and more the used for magnesium alloy that contains magnesium and various interpolation elements is acted on the housing of electronic apparatus such as mobile telephone and kneetop computer and the material of trolley part.
Because magnesiumalloy has hexagonal crystallographic texture (hexagonal closs packing (hcp) structure) and has the inductile formability at normal temperatures, so magnesium alloy component such as above-mentioned housing are mainly formed by cast material through the casting die or the thixotroping method of forming.Recently, carried out research to form housing through the sheet that is made up of the AZ31 alloy according to American Society for Tests and Materials (ASTM) standard is carried out press process.Patent documentation 1 has proposed a kind of calendared sheet that is made up of the alloy of working as with the AZ91 alloy phase of ASTM standard, and said calendared sheet has good press processability.
Reference listing
Patent documentation
Patent documentation 1: TOHKEMY 2007-098470 communique
Summary of the invention
Technical problem
Because magnesiumalloy is in light weight and show good specific tenacity and specific rigidity, so expectation is not only used it in the normal temperature environment under about 0 ℃～30 ℃, also expectation is used it in the cold area and refrigerating chamber that is lower than zero degree.Yet, the mechanical property of magnesiumalloy under this low temperature environment thoroughly do not studied as yet.
Aspect intensity, the cast material of magnesiumalloy is inferior to the rolled material of magnesiumalloy and the member of press process.Contriver of the present invention also finds, in low temperature environment, also has inadequate intensity and low shock-resistance through the AZ31 alloy being carried out the member that press process forms.
On the contrary, have than sheet that constitutes by the AZ31 alloy and the higher intensity of press members that constitutes by the AZ31 alloy at the calendared sheet that constitutes by the AZ91 alloy described in the patent documentation 1 with through these calendared sheets being carried out member that press process forms.Yet the inventor has carried out research and has found, the calendared sheet that is made up of the AZ91 alloy and insufficient sometimes through said calendared sheet being carried out the shock-resistance of member in low temperature environment that plastic forming such as press process form.
Even an object of the present invention is to provide magnesium alloy component that in low temperature environment, still has high-impact and the magnesiumalloy sheet that is suitable as the material that is used for this member.Another object of the present invention provides the method that is used to make magnesiumalloy sheet of the present invention.
The means of dealing with problems
The inventor has made the magnesiumalloy sheet under various conditions; The gained sheet has been carried out plastic forming such as press process with the preparation magnesium alloy component, and these magnesiumalloy sheets and shock-resistance (anti-pitting) and the mechanical property of member in low temperature environment have been studied.As a result, they find, it is little and have a crystallization phases of specific composition that the magnesiumalloy sheet with high anti-pitting contains seldom size.Size seldom is little and have the magnesium alloy component that the magnesiumalloy sheet of the crystallization phases of specific composition obtains and also have high anti-pitting by containing, and the same with the sheet of said material, and it is little and have a crystallization phases of specific composition that said member also contains seldom size.They also find, for the number and the maximum diameter of crystallization control phase in the manufacturing of magnesiumalloy sheet promptly reduces the number of crystallization phases and the number of thick crystallization phases, preferably under given conditions the gained cast tablets are cast continuously and roll.Accomplished the present invention based on these discoveries.
Magnesiumalloy sheet of the present invention is made up of the magnesiumalloy that contains Al and Mn.When on the thickness direction of said magnesiumalloy sheet will from the thickness of surface to the said alloy slice of said alloy slice 30% till zone definitions be surf zone and from this surf zone, select 50 μ m arbitrarily
2Subregion the time, be that the quantity of particle of the crystallization phases of 0.1～1 μ m is below 15 as containing Al and Mn and maximum diameter.In addition, in the particle of said crystallization phases, Al is 2～5 to the mass ratio Al/Mn of Mn.
Can make magnesiumalloy sheet of the present invention through method of manufacture of the present invention below for example with ad hoc structure.The method that is used to make the magnesiumalloy sheet according to the present invention comprises following casting step and calendering step:
Casting step: the magnesium alloy cast casting step in blocks that will contain Al and Mn.
Calendering step: the calendering step that the cast tablets that obtains through said casting step is rolled.
Especially, under the roll temperature below 100 ℃, carry out said casting, and the thickness of said cast tablets is below the 5mm through twin-roll continuous casting technology.
Through magnesiumalloy sheet of the present invention is carried out plastic forming such as press process, made magnesium alloy component of the present invention.This member also has and the identical structure of magnesiumalloy sheet of the present invention, promptly when from surf zone, selecting 50 μ m arbitrarily
2Subregion the time, be below 15 as the quantity of the particle of the crystallization phases of specific dimensions and specific composition.
According to the continuous casting process that can implement rapid solidification such as twin-roll continuous casting technology, can reduce the amount of oxide compound and segregation thing, the generation of thick crystallization phases can be suppressed, and the fine crystalline phase can be formed.Especially, manufacturing method according to the invention, through with the thickness adjusted of roll temperature and cast tablets in above-mentioned specified range, fully improved rate of cooling, can suppress the generation of crystallization phases self thus.Therefore, can the structural transformation that the face side of the sheet that is subject to shock effect is regional be to contain the seldom structure of fine crystalline phase.The chances are because the size of crystallization phases is little with amount, so the decline of the Al amount of the solid solution in parent phase that is caused mutually by thick crystallization phases or mass crystallization is suppressed.And rapid solidification has obtained having the cast tablets of the little microtexture of average crystalline particle diameter.This cast tablets contains the thick crystallization phases of the starting point of seldom serving as fracture and distortion and has the high-ductility formability thus like calendering.When cast tablets is rolled, can improve intensity and elongation.
Thus, the alloy slice of the present invention that obtains through above-mentioned method of manufacture has the thick crystallization phases of reduction and crystallization phases seldom.Especially; Said structure contains the thick crystallization phases of reduction and has the structure that wherein has trace and more preferably do not contain the fine crystalline phase basically in the face side zone of influence that is easy to be hit, even thus when rupturing and break because of for example falling to receiving still to be not easy to when impacting generation.Because the amount of crystallization phases is little, so can suppress the decline of the Al content of solid solution, can keep HS because of the solid solution Al that has abundant amount, and can further improve intensity through calendering.Therefore, even when receiving that alloy slice of the present invention when impacting still has resistivity to depression and not only in room temperature (about 20 ℃) but also be lower than under 0 ℃ the low temperature environment and all shown high-impact.For example, the alloy slice of the present invention that has an ad hoc structure also has good plastic forming property and can easily carry out press process.The same with alloy slice of the present invention, the alloy components of the present invention that obtains thus also has wherein the size structure little with amount of crystallization phases in the face side zone of influence that is easy to especially to be hit.Therefore, alloy components of the present invention also has favorable mechanical performance such as intensity and elongation and has shown high-impact in low temperature environment.
To be elaborated to the present invention now.
Form
The instance that constitutes the magnesiumalloy of magnesiumalloy sheet of the present invention and magnesium alloy component of the present invention comprises and has various compositions and contain at least Al and Mn as the material that adds element (surplus is Mg and impurity).The instance of the interpolation element except Al and Mn is for being selected from least a element in Zn, Si, Ca, Sr, Y, Cu, Ag, Ce, Zr and the REE (except that Y with the Ce).Especially, preferably contain the Al of 5 quality %～12 quality % and the Mn of 0.1 quality %～2.0 quality %.When these scopes contain Al and Mn, not only improved mechanical property such as intensity and elongation, but also improved erosion resistance.Yet, if the content of these elements is excessive, the decline of plastic forming property.The content of the interpolation element except Al and Mn is for example Zn:0.2～7.0 quality %, Si:0.2～1.0 quality %, Ca:0.2～6.0 quality %, Sr:0.2～7.0 quality %, Y:1.0～6.0 quality %, Cu:0.2～3.0 quality %, Ag:0.5～3.0 quality %, Ce:0.05～1.0 quality %, Zr:0.1～1.0 quality % and RE (REE (except that Y and Ce)): 1.0～3.5 quality %.When except Al and Mn, also containing these elements, can further improve mechanical property.The instance of composition that contains at least a alloy of Al and Mn and these elements with the amount of above-mentioned scope comprises AZ series alloy (the Mg-Al-Zn series alloy of ASTM standard; Zn:0.2～1.5 quality %) and AM series alloy (Mg-Al-Mn series alloy, Mn:0.15～0.5 quality %).Especially, the amount of the Al that contains (hereinafter being called " Al content ") is preferred big, because mechanical property and erosion resistance improve with the increase of Al content, and Al content 5.8 quality %～10 quality % more preferably.The preferred embodiment of magnesiumalloy with Al content of 5.8%～10 quality % comprises Mg-Al-Zn series alloy such as AZ61 alloy, AZ80 alloy, AZ81 alloy and AZ91 alloy and Mg-Al-Mn series alloy such as AM60 alloy and AM100 alloy.Especially, compare with other Mg-Al series alloys, the AZ91 alloy with Al content of 8.3～9.5 quality % has more excellent erosion resistance and mechanical property such as intensity and anti-viscous deformation property.
The pattern of magnesiumalloy sheet and magnesium alloy component
Alloy slice of the present invention has first surface and second surface, and said first surface and second surface are a pair of mutually opposite surface.These two surfaces typically are parallel to each other and serve as front and back during use usually.Said first and second surfaces can be smooth or crooked.Distance between said first and second surface is the thickness of magnesiumalloy sheet.Through obtaining alloy slice of the present invention by above-mentioned cast tablets with the following thickness of 5mm is rolled; Thus, the thickness of alloy slice of the present invention is less than 5mm.Especially, because alloy slice of the present invention be plastic forming such as press process and with the material that acts on thin, lightweight housing and various members, so the thickness of alloy slice is about 0.3mm～3mm and preferred 0.5mm～2.0mm.Said alloy slice has shown HS during for big value in this scope when thickness, and works as thickness hour, become be suitable for approaching, in the lightweight housing etc.Through casting condition and rolling condition being controlled according to intended use, the thickness of the magnesiumalloy sheet that can select to obtain as the finished product.
The representative example of the shape of alloy components of the present invention comprises through the magnesiumalloy sheet being carried out different shape that plastic forming such as press process form as having the bottom and the side-bracket or the box component of upwardly extending side wall portion from said bottom.The thickness of the magnesium alloy component in the flat that does not experience the distortion that is caused by plastic forming such as press process basically is basic identical with the thickness as the magnesiumalloy sheet of material, and its structure is also basic identical.In other words, surf zone satisfies per 50 μ m
2On have an Al-Mn crystallization phases of 0.1～1 μ m maximum diameter number be below 15.
The instance of alloy slice of the present invention comprises through cast material being rolled the calendared sheet for preparing and through the processing sheet of said calendared sheet being heat-treated, smooth processing, attrition process etc. prepare.Alloy components of the present invention can be for through carrying out the member that plastic forming such as press process prepare and after plastic forming, heat-treating or the member of attrition process to alloy slice.The etch resistant layer that calendared sheet, processing sheet and alloy components also can have coating.
Mechanical property
Even alloy slice of the present invention and alloy components of the present invention still have favorable mechanical performance such as intensity and elongation and when receiving impact as falling, have anti-pitting under low temperature environment.For example; In the tension test under-30 ℃, do not experiencing basically by plastic forming such as press process and alloy slice of the present invention in the flat (with the essentially identical part of the sheet of material) of the distortion (distortion that is for example caused by drawing) that causes and alloy components of the present invention have shown the elongation more than the tensile strength more than the 350MPa, 0.2% proof stress and 2% more than the 280MPa.
Structure
Crystallization phases
When observing when any chooser zone from the face side zone of alloy slice of the present invention and to its structure, said structure does not contain thick crystallization phases basically but comprises micro-fine crystalline phase.Especially, on the thickness direction of alloy slice, will from the thickness of surface to the said alloy slice of said alloy slice 30% till zone definitions be surf zone, from this surf zone, select 50 μ m arbitrarily
2Subregion, and the particle diameter of all crystallization phasess of in a sub regions, finding measured.When from each crystallization phases, measuring maximum diameter, the number that in subregion, has the fine crystalline phase of 0.1 μ m～1 μ m maximum diameter is below 15.Preferably, only existence has the crystallization phases of the following maximum diameter of 0.5 μ m.When the thick crystallization phases that exists greater than 1 μ m, said thick crystallization phases can be served as receiving and impacted as the starting point of fracture when falling.Thus, be easy to take place fracture and break and shock-resistance low.Even during the maximum diameter below crystallization phases has 1 μ m, when at 50 μ m
2In when exist surpassing this impurity in 15 places, the number that is used to rupture with the disruptive starting point also increases, thereby causes intensity and shock-resistance decline.When the number of the crystallization phases with 0.1～1 μ m maximum diameter hour, shock-resistance is tended to height.Said number is preferably below 10 and is desirably zero.Said crystallization phases contains Al and Mn.Describe in the face of the details of measuring maximum diameter down.It should be noted that in the present invention, allow to exist to be difficult for causing the ultra-fine crystallization phases of fracture promptly to have crystallization phases less than the maximum diameter of 0.1 μ m.Yet, preferably do not have sedimentary impurity.
The average crystalline particle diameter
The instance of alloy slice of the present invention is to have the i.e. alloy slice of the microstructure below the 20 μ m of small average crystalline particle diameter.As stated, obtain having the cast tablets of microstructure, and can prepare calendared sheet with above-mentioned microstructure through under given conditions said cast tablets being rolled through continuous casting under given conditions.Even have the alloy slice of the present invention of this microstructure has still shown favorable mechanical performance such as intensity and elongation and raising in low temperature environment shock-resistance.Can also to have the average crystalline particle diameter be the microstructure below the 20 μ m and show high-impact by the magnesiumalloy sheet with microstructure or through calendared sheet being corrected the magnesium alloy component of processing like the smooth processing sheet for preparing of the present invention.More preferably, the average crystalline particle diameter is 0.1 μ m～10 μ m.
Method of manufacture
Casting
In method of manufacture of the present invention, use twin-roll continuous casting technology.In this casting, will as below the temperature regulation to 100 of the roller of mould ℃ and the thickness adjusted of the cast tablets that will obtain thus to 5mm.Through reducing the thickness and the roll temperature of cast tablets, the generation of the crystallization phases that has suppressed to be caused by rapid solidification also can access the cast tablets that contains the crystallization phases that still less size is little.Through using the roller that to force to cool off that roll temperature is adjusted to below 100 ℃ like water-cooled.Said roll temperature is low more and said cast tablets is thin more, the then faster generation that has also suppressed crystallization phases more of rate of cooling.Therefore, roll temperature is more preferably below 60 ℃ and the thickness of cast tablets more preferably below the 4.0mm.Preferably in inert gas atmosphere, implement this casting step (comprising cooling step) to prevent the oxidation of magnesiumalloy.
Calendering
Rolling condition is the temperature of heating material for example: 200 ℃～400 ℃, add the temperature of hot calender roll: 150 ℃～300 ℃, and every time draft: 5%～50%.For with thickness adjusted to expected value, can repeatedly roll.Also can use disclosed controlled calendering in patent documentation 1.When cast material is rolled, can structure be converted into the calendering structure from the metal construction that is formed by casting.In addition, through rolling, can easily form microstructure, and can reduce inside and surface imperfection such as segregation, shrinkage cavity and the hole that produces by casting, and can access calendared sheet with excellent superficial makings with the average crystalline particle diameter below the 20 μ m.Through after final calendering, carrying out intensity and the erosion resistance that final thermal treatment can further improve the gained calendared sheet, form fine recrystallization structure thus with the average crystalline particle diameter below the 20 μ m.
Plastic forming
Form and be intended shape through calendared sheet (comprising the thermal treatment calendared sheet) being carried out plastic forming such as press process (comprising stamping-out), deep-draw, forging, blowing or bending, obtained alloy components of the present invention.If under 200 ℃～280 ℃ gentle technology, carry out plastic forming, the structure that then said plastic forming can suppress calendared sheet becomes thick recrystallization structure and reduces mechanical property and the deterioration of erosion resistance.Thermal treatment or anti-corrosive treatment can be after plastic forming, implemented or coating can be formed.
The invention effect
Magnesiumalloy sheet of the present invention and magnesium alloy component have high-impact under low temperature environment.The present invention is used to make the method for magnesiumalloy sheet can make magnesiumalloy sheet of the present invention.
Description of drawings
Fig. 1 is the synoptic diagram that shows shock test.
Embodiment
To describe embodiment of the present invention now.
Test Example 1
Use the ingot (being purchased obtainable product) that constitutes by the magnesiumalloy shown in the Table I to make magnesiumalloy sheet and magnesium alloy component (housing) under various conditions.The structure of gained magnesiumalloy sheet and magnesium alloy component is observed and carried out tension test (low temperature) and shock test (low temperature).Create conditions as follows.
(condition A: twin roller casting → calendering)
In inert atmosphere, each magnesium alloy ingot is heated to 700 ℃ with the preparation molten metal, and in inert atmosphere, uses said molten metal to form thickness separately to be 4.0mm (＜5mm) a plurality of cast tablets through twin-roll continuous casting technology.Cool off at pair roller and to carry out this casting when making roll temperature be 60 ℃ (＜100 ℃).With each gained cast tablets as material and under 200 ℃～400 ℃ material Heating temperature, 150 ℃～300 ℃ stack Heating temperature, every time draft of 5%～50%, be that 0.6mm is with the preparation calendared sheet repeatedly until the thickness of material with its calendering.Gained calendared sheet (magnesiumalloy sheet) is used as sample (sheet).Under 250 ℃ Heating temperature, the gained calendared sheet being carried out the rectangle cup stretches with the housing of the preparation side of having-bracket xsect.This housing (magnesium alloy component) is used as sample (housing).
After casting, can implement thermal treatment (solution processing) or burin-in process so that even structure can be implemented intermediate heat treatment during rolling, perhaps can after final calendering, implement final thermal treatment.Can carry out smooth processing or attrition process maybe can be ground so that smooth surface it to improve Flatness through rectification to said calendared sheet.Also can these be applied to following Test Example 2.
(condition B: die casting)
Use is purchased obtainable die-cast product (housing of the side of having-bracket xsect, the thickness of bottom: 0.6mm)
(condition C: be purchased obtainable)
Use is purchased obtainable (thickness: 0.6mm) by what the AZ31 alloy constituted.
(condition D: be purchased obtainable housing)
Use is through to the sheet that is made up of the AZ31 alloy (thickness: 0.6mm) carry out the stretch housing (thickness of bottom: 0.6mm) (be purchased obtainable product) of the side of having-bracket xsect of preparing of rectangle cup.
Structure observation
For the various samples that obtain, by as follows metal construction being observed so that crystallization phases is studied.On thickness direction, sample (sheet) is cut, and utilize transmission electron microscope (20000 multiplying power) pair cross-section to observe.In this range of observation, on the thickness direction of sample (sheet) will from the thickness of surface to the sample (sheet) of sample (sheet) 30% (zone definitions till the 0.6mm * 30%=0.18mm) is a surf zone.From surf zone, select five 50 μ m arbitrarily
2Subregion, and measured the size that is present in all crystallization phasess in each sub regions.Carry out the judgement of crystallization phases based on forming.For example after pair cross-section carries out mirror ultrafinish, confirm to be present in the composition of the particle in the cross section through qualitative analysis and semi-quantitative analysis such as energy dispersion X ray spectrum (EDX), and the particle that will contain Al and Mg is judged to be crystallization phases.For the various crystallization phasess that contain Al and Mn, measured the ratio Al/Mn of the quality of Al to the quality of Mn.Al/Mn is 2～5 in all sample 1-1 and 1-2.For the various particles of crystallization phases in the cross section, the peak of in the cross section, having drawn parallel lines and will cross the length of each particle of collinear is confirmed as the maximum diameter of said particle.The number that will have the crystallization phases of 0.1 μ m～1 μ m maximum diameter is defined as the number of crystallization phases in the subregion.The mean number of five sub regions is defined as at per 50 μ m
2This sample in the crystallization phases number.For sample (housing), on the thickness direction of sheet, the bottom that does not experience the flat of tensile deformation in as sample is cut, and the same with said sample (sheet), pair cross-section is observed with to per 50 μ m
2On the number of crystallization phases count.When in the image of observing, the thick crystallization phases with the maximum diameter that surpasses 5 μ m being observed, change the area of subregion into 200 μ m
2And at this 200 μ m
2Maximum diameter and per 200 μ m of middle crystallization phases
2The number of last crystallization phases is measured.The shape of all subregion can have any shape, as long as area satisfies above-mentioned explanation, but rectangular shape (typically being square) is easy to use.Measuring result is shown in the Table I.
Tension test (low temperature)
From each sample (thickness: take out the 13B of JIS (JIS) sheet test film (JIS Z 2201 (1998)) 0.6mm) and carry out tension test according to the metal material stretching test method of JIS Z 2241 (1998).In said test, gauged distance (gage distance) GL of sample (sheet) is set at 50mm and the gauged distance GL of sample (housing) is set at 15mm.For all samples; Test temperature is set at-30 ℃ and draw speed is set at 5mm/ minute carrying out tension test, thereby confirms tensile strength (MPa), 0.2% proof stress (MPa) and elongation (%) (evaluation number: n=1 in all situations).The result is shown in the Table I.It should be noted that for sample (housing), prepare test film that is used for tension test and the test film that is used for following shock test through the bottom cutting to sample, the bottom of said sample is not for experiencing the flat of tensile deformation.
Shock test (low temperature)
From various samples, cut the sheet of 30mm * 30mm and it is used as test film.In this test, as shown in fig. 1, prepare in horizontal surface, to have the support platform 20 that diameter d is the circular hole 21 of 20mm.The degree of depth of said circular hole 21 enough makes greatly can insert cylindrical rod 10.Place test film 1 to cover circular hole 21 and to be provided with in the position that apart from test film 1 be the 200mm height that to have 100g weight and the ceramic cylinder of 5mm tip r excellent 10, make the hub of test film 1 and the spigot shaft coaxle of circular hole 21.Make cylindrical rod 10 from above-mentioned position (highly for 200mm) to the amount of recess of test film 1 free-falling and experiment with measuring sheet 1.The straight line of two opposition sides through draw connecting test film 1 also utilizes point micrometer to measure the distance from said straight line to the depression the best part, has measured amount of recess (mm).Under-30 ℃ low temperature environment, carry out shock test.The result is shown in the Table I.With amount of recess is that sample below the 0.5mm is shown grade O and will advances the sample that amount of recess surpasses 0.5mm and is shown grade X.For because of the fracture sample of energy measurement amount of recess not, be shown as " fracture ".For the disruptive sample takes place, be shown as " breaking ".The thickness by the 30mm * 30mm test film of sample (housing) preparation has been measured at the place four arbitrfary points.In all positions, the thickness (thickness of test film: 0.6mm) equal the thickness (0.6mm) of the sheet of material.
Shown in Table I, compare with expansion material (AZ31 alloy) with cast material, wherein optional per 50 μ m from surf zone with same composition
2On have an Al-Mn crystallization phases of 0.1～1 μ m maximum diameter number be magnesiumalloy sheet and magnesium alloy component below 15, even under-30 ℃ low temperature environment, amount of recess is also little and shock-resistance is also high.Its reason probably does, and is even under low temperature environment, still excellent such as the mechanical property of tensile strength and elongation.Especially, according to this test, sample 1-1 and 1-2 with high-impact only contain the crystallization phases with the following maximum diameter of 0.5 μ m.From sample 1-1 with high-impact and 1-2, do not observe Al-Mn crystallization phases and can think and in surf zone, do not have said crystallization phases at least basically with the maximum diameter that surpasses 1 μ m.On the contrary, not that the sample of under the particular cast condition, making that is purchased obtainable product contains thick crystallization phases in surf zone, and probably because of existing this thick crystallization phases to be easy to rupture.Also found, through at optional 50 μ m from surf zone
2In contain 15 sentence down Al-Mn crystallization phases with 0.1～1 μ m maximum diameter the magnesiumalloy sheet carry out plastic forming such as press process can access the magnesium alloy component with high-impact.
Test Example 2
Use the ingot (being purchased obtainable product) that constitutes by the magnesiumalloy shown in the Table II to make magnesiumalloy sheet and magnesium alloy component (housing) under various conditions.The structure of gained magnesiumalloy sheet and magnesium alloy component is observed and by carrying out shock test (low temperature) in the Test Example 1.The result is shown in the Table II.
As for create conditions " casting → calendering ", cast and shown in Table II, set the condition of roll temperature and cast tablets thickness through twin-roll continuous casting technology.With Test Example I in roll under the identical rolling condition.Yet, in this test, through regulate the material heating time, rate of cooling during the calendering speed, calendering etc., the total time length adjustment that material is remained in 150 ℃～250 ℃ the TR is 45 minutes or 90 minutes.It should be noted that in Test Example 1, with this total time length setting be about 60 minutes.In Table II, shape " sheet " is meant that sample is that calendared sheet (magnesiumalloy sheet) and " housing " are meant that sample is the housing of under the condition identical with Test Example 1, being made by calendared sheet (magnesium alloy component).
About creating conditions, " condition B ", " condition C " are identical with condition D (being purchased obtainable housing) with condition B (die casting), the condition C (being purchased obtainable) of Test Example 1 with " condition D ".About create conditions " casting → calendering ", prepare to be purchased obtainable extruded material and under the condition identical, to roll with create conditions " casting → calendering ".The gained calendared sheet is used as sample (sheet), and under the condition identical, makes box-shaped sample (housing) by this calendared sheet with " casting → calendering ".
Table II shows, is calendered to the cast tablets of the following thickness of 5mm through the cast tablets that under the roll temperature below 100 ℃, will utilize the twin-roll continuous casting cast, can access optional per 50 μ m from surf zone
2On have an Al-Mn crystallization phases of 0.1～1 μ m maximum diameter number be magnesiumalloy sheet and magnesium alloy component below 15.On the contrary, only if observed specific casting condition, otherwise thick crystallization phases can not take place.In addition, result's demonstration, the same with Test Example 1, even under-30 ℃ low temperature environment, optional per 50 μ m from surf zone
2On have an Al-Mn crystallization phases of 0.1～1 μ m maximum diameter number be that magnesiumalloy sheet and magnesium alloy component below 15 still shown high-impact.In all sample 2-1～2-6, Al/Mn has been carried out measuring and all be 2～5.
In addition, test finds, (1) is when the thickness of the cast material of preparation is identical, through reducing the amount that roll temperature can reduce crystallization phases; And (2) when roll temperature is identical, can reduce the amount of crystallization phases through the thickness that reduces the cast material for preparing.
Should be understood that under the condition that does not deviate from scope of the present invention can carry out multiple change and scope of the present invention to above-mentioned embodiment can't help the said structure restriction.For example, can change the composition of magnesiumalloy, the thickness of casting afterwards and roll sheet afterwards, the roll temperature during the casting etc. as required.Can carry out anti-corrosive treatment or utilize coating to apply the calendared sheet that obtains or the member of compacting.
Industrial applicibility
Because magnesium alloy component of the present invention has high-impact under low temperature environment, so it is applicable to various housings and the parts that under low temperature environment, use.Magnesiumalloy sheet of the present invention is suitable as the structured material of magnesium alloy component of the present invention.The method that the present invention is used to make the magnesiumalloy sheet is applicable to makes magnesiumalloy sheet of the present invention.
Reference numeral
1 test film; 10 cylindrical rods; 20 support platform; 21 circular holes
Claims (5)
1. magnesiumalloy sheet that comprises the magnesiumalloy that contains Al and Mn,
Wherein when on the thickness direction of said magnesiumalloy sheet will from the thickness of surface to the said alloy slice of said alloy slice 30% till zone definitions be surf zone and from this surf zone, select 50 μ m arbitrarily
2Subregion the time, be that the quantity of particle of the crystallization phases of 0.1～1 μ m is below 15 as containing Al and Mn and maximum diameter, and
In the particle of said crystallization phases, Al is 2～5 to the mass ratio Al/Mn of Mn.
2. magnesiumalloy sheet as claimed in claim 1, wherein said magnesiumalloy contain the Al of 5 quality %～12 quality % and the Mn of 0.1 quality %～2.0 quality %.
3. according to claim 1 or claim 2 magnesiumalloy sheet, wherein said magnesiumalloy also contains at least a element that is selected from Zn, Si, Ca, Sr, Y, Cu, Ag, Ce, Zr and the REE (except that Y with the Ce).
4. magnesium alloy component, it is through making carrying out plastic forming according to each magnesiumalloy sheet in the claim 1～3.
5. method that is used to make the magnesiumalloy sheet, said method comprises:
The magnesium alloy cast casting step in blocks that will contain Al and Mn, and
The calendering step that the cast tablets that obtains through said casting step is rolled,
Wherein under the roll temperature below 100 ℃, carry out said casting, and the thickness of said cast tablets is below the 5mm through twin-roll continuous casting technology.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-152849 | 2009-06-26 | ||
| JP2009152849A JP2011006754A (en) | 2009-06-26 | 2009-06-26 | Magnesium alloy sheet |
| PCT/JP2010/059710 WO2010150651A1 (en) | 2009-06-26 | 2010-06-08 | Magnesium alloy plate |
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| Publication Number | Publication Date |
|---|---|
| CN102803533A true CN102803533A (en) | 2012-11-28 |
| CN102803533B CN102803533B (en) | 2016-01-20 |
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| CN201080028074.6A Expired - Fee Related CN102803533B (en) | 2009-06-26 | 2010-06-08 | Magnesium alloy plate |
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|---|---|
| US (1) | US20120100035A1 (en) |
| EP (1) | EP2447381A4 (en) |
| JP (1) | JP2011006754A (en) |
| KR (1) | KR20120031008A (en) |
| CN (1) | CN102803533B (en) |
| BR (1) | BRPI1015407A2 (en) |
| RU (1) | RU2012102620A (en) |
| TW (1) | TW201111521A (en) |
| WO (1) | WO2010150651A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105695829A (en) * | 2016-03-18 | 2016-06-22 | 南阳师范学院 | Magnesium alloy resistant to low-temperature environment and preparing method of magnesium alloy |
| CN106811641A (en) * | 2015-12-01 | 2017-06-09 | 镇江市润州金山金属粉末厂 | A kind of high-strength magnesium al-sr alloy |
| CN112921224A (en) * | 2021-02-23 | 2021-06-08 | 山西瑞格金属新材料有限公司 | High-strength high-thermal-conductivity magnesium alloy for ultrathin wall parts for die casting and preparation method thereof |
| CN113186436A (en) * | 2021-04-21 | 2021-07-30 | 维沃移动通信有限公司 | Magnesium alloy material, preparation method and electronic equipment |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BRPI0919653A2 (en) * | 2008-10-22 | 2015-12-08 | Sumitomo Electric Industries | product formed of magnesium alloy and 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 |
| KR101080164B1 (en) * | 2011-01-11 | 2011-11-07 | 한국기계연구원 | Ignition-proof magnesium alloy with excellent mechanical properties and method for manufacturing the ignition-proof magnesium alloy |
| CN103866169B (en) * | 2014-03-12 | 2016-03-09 | 苏州凯宥电子科技有限公司 | A kind of room temperature high-ductility wrought magnesium alloy and preparation method thereof |
| JP6465338B2 (en) * | 2014-10-15 | 2019-02-06 | 住友電気工業株式会社 | Magnesium alloy, magnesium alloy plate, magnesium alloy member, and method for producing magnesium alloy |
| CN106834845B (en) * | 2016-11-11 | 2018-04-10 | 太原理工大学 | A kind of preparation method of activeness and quietness type magnalium silicon kirsite plate |
| JP7186396B2 (en) * | 2019-02-13 | 2022-12-09 | 国立大学法人豊橋技術科学大学 | Manufacturing method for high-strength rod-shaped magnesium alloy |
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| WO2009001516A1 (en) * | 2007-06-28 | 2008-12-31 | Sumitomo Electric Industries, Ltd. | Magnesium alloy plate |
| JP2009007606A (en) * | 2007-06-27 | 2009-01-15 | Mitsubishi Alum Co Ltd | Magnesium alloy sheet material having excellent corrosion resistance and surface treatability, and method for producing the same |
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| JPH06256883A (en) * | 1993-03-04 | 1994-09-13 | Kobe Steel Ltd | Magnesium alloy having excellent creep strength |
| JP4476787B2 (en) * | 2004-11-17 | 2010-06-09 | 三菱アルミニウム株式会社 | Method for producing magnesium alloy sheet with excellent press formability |
| JP4780600B2 (en) * | 2004-11-17 | 2011-09-28 | 三菱アルミニウム株式会社 | Magnesium alloy sheet excellent in deep drawability and manufacturing method thereof |
| JP4429877B2 (en) * | 2004-11-18 | 2010-03-10 | 三菱アルミニウム株式会社 | Method for producing magnesium alloy sheet having fine crystal grains |
| JP4780601B2 (en) * | 2004-11-18 | 2011-09-28 | 三菱アルミニウム株式会社 | Magnesium alloy plate excellent in press formability and manufacturing method thereof |
| JP4730601B2 (en) | 2005-03-28 | 2011-07-20 | 住友電気工業株式会社 | Magnesium alloy plate manufacturing method |
| JP4991281B2 (en) * | 2006-12-28 | 2012-08-01 | 三菱アルミニウム株式会社 | Magnesium alloy sheet manufacturing method |
| JP2008308703A (en) * | 2007-06-12 | 2008-12-25 | Mitsubishi Alum Co Ltd | Magnesium alloy for continuously casting and rolling, and method for producing magnesium alloy material |
| JP2009120883A (en) * | 2007-11-13 | 2009-06-04 | Mitsubishi Alum Co Ltd | Magnesium alloy foil and its manufacturing method |
| JP4613965B2 (en) * | 2008-01-24 | 2011-01-19 | 住友電気工業株式会社 | 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 |
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2009
- 2009-06-26 JP JP2009152849A patent/JP2011006754A/en active Pending
-
2010
- 2010-06-08 WO PCT/JP2010/059710 patent/WO2010150651A1/en active Application Filing
- 2010-06-08 CN CN201080028074.6A patent/CN102803533B/en not_active Expired - Fee Related
- 2010-06-08 RU RU2012102620/02A patent/RU2012102620A/en unknown
- 2010-06-08 KR KR1020117029242A patent/KR20120031008A/en active Search and Examination
- 2010-06-08 EP EP10791969.8A patent/EP2447381A4/en not_active Withdrawn
- 2010-06-08 US US13/381,009 patent/US20120100035A1/en not_active Abandoned
- 2010-06-08 BR BRPI1015407A patent/BRPI1015407A2/en not_active IP Right Cessation
- 2010-06-25 TW TW099120731A patent/TW201111521A/en unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009007606A (en) * | 2007-06-27 | 2009-01-15 | Mitsubishi Alum Co Ltd | Magnesium alloy sheet material having excellent corrosion resistance and surface treatability, and method for producing the same |
| WO2009001516A1 (en) * | 2007-06-28 | 2008-12-31 | Sumitomo Electric Industries, Ltd. | Magnesium alloy plate |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106811641A (en) * | 2015-12-01 | 2017-06-09 | 镇江市润州金山金属粉末厂 | A kind of high-strength magnesium al-sr alloy |
| CN105695829A (en) * | 2016-03-18 | 2016-06-22 | 南阳师范学院 | Magnesium alloy resistant to low-temperature environment and preparing method of magnesium alloy |
| CN105695829B (en) * | 2016-03-18 | 2017-09-22 | 南阳师范学院 | A kind of magnesium alloy of low temperature resistant environment and preparation method thereof |
| CN112921224A (en) * | 2021-02-23 | 2021-06-08 | 山西瑞格金属新材料有限公司 | High-strength high-thermal-conductivity magnesium alloy for ultrathin wall parts for die casting and preparation method thereof |
| CN113186436A (en) * | 2021-04-21 | 2021-07-30 | 维沃移动通信有限公司 | Magnesium alloy material, preparation method and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| US20120100035A1 (en) | 2012-04-26 |
| WO2010150651A1 (en) | 2010-12-29 |
| RU2012102620A (en) | 2013-08-10 |
| BRPI1015407A2 (en) | 2016-08-09 |
| CN102803533B (en) | 2016-01-20 |
| JP2011006754A (en) | 2011-01-13 |
| EP2447381A1 (en) | 2012-05-02 |
| KR20120031008A (en) | 2012-03-29 |
| TW201111521A (en) | 2011-04-01 |
| EP2447381A4 (en) | 2016-03-09 |
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