WO2012115190A1 - マグネシウム合金材及びその製造方法 - Google Patents
マグネシウム合金材及びその製造方法 Download PDFInfo
- Publication number
- WO2012115190A1 WO2012115190A1 PCT/JP2012/054418 JP2012054418W WO2012115190A1 WO 2012115190 A1 WO2012115190 A1 WO 2012115190A1 JP 2012054418 W JP2012054418 W JP 2012054418W WO 2012115190 A1 WO2012115190 A1 WO 2012115190A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- magnesium alloy
- plate
- rolling
- plane
- region
- Prior art date
Links
- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 123
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 126
- 238000005096 rolling process Methods 0.000 claims abstract description 97
- 239000000956 alloy Substances 0.000 claims abstract description 90
- 230000009467 reduction Effects 0.000 claims abstract description 27
- 239000013078 crystal Substances 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 24
- 238000005266 casting Methods 0.000 claims description 12
- 239000000654 additive Substances 0.000 claims description 11
- 230000000996 additive effect Effects 0.000 claims description 11
- 238000002441 X-ray diffraction Methods 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 abstract description 24
- 239000008207 working material Substances 0.000 abstract description 10
- 239000011777 magnesium Substances 0.000 abstract description 6
- 239000007858 starting material Substances 0.000 abstract description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 1
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 229910052749 magnesium Inorganic materials 0.000 abstract 1
- 239000004033 plastic Substances 0.000 description 56
- 238000012545 processing Methods 0.000 description 30
- 238000010438 heat treatment Methods 0.000 description 23
- 238000011282 treatment Methods 0.000 description 13
- 239000000203 mixture Substances 0.000 description 9
- 238000009749 continuous casting Methods 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 8
- 238000012937 correction Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 230000007547 defect Effects 0.000 description 6
- 238000005498 polishing Methods 0.000 description 6
- 239000002244 precipitate Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000002994 raw material Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- 238000004381 surface treatment Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910052727 yttrium Inorganic materials 0.000 description 4
- 229910052684 Cerium Inorganic materials 0.000 description 3
- 229910003023 Mg-Al Inorganic materials 0.000 description 3
- 238000004512 die casting Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 229910018137 Al-Zn Inorganic materials 0.000 description 2
- 229910018573 Al—Zn Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 229910000674 AJ alloy Inorganic materials 0.000 description 1
- 229910018131 Al-Mn Inorganic materials 0.000 description 1
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 1
- 229910018461 Al—Mn Inorganic materials 0.000 description 1
- 229910000549 Am alloy Inorganic materials 0.000 description 1
- 229910000882 Ca alloy Inorganic materials 0.000 description 1
- 229910001278 Sr alloy Inorganic materials 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000007743 anodising Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000002989 correction material Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 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
- 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
- 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
- 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
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
-
- 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
-
- 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
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2201/00—Treatment for obtaining particular effects
- C21D2201/05—Grain orientation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
Definitions
- the present invention relates to various members such as parts of transportation equipment such as automobiles, railway vehicles, airplanes, bicycle parts, casings of electronic / electric equipment, and other structural members, and magnesium alloy materials suitable for constituent materials of the members, And a manufacturing method thereof.
- the present invention relates to a magnesium alloy material that is thick and excellent in plastic workability such as press working.
- a relatively thin plate material having a thickness of 1 mm or less has been studied as a material of a plastic work material such as a press work material, focusing on the light weight of a magnesium alloy.
- a plastic work material such as a press work material
- a thickness of 1.5 mm or more Is desired.
- a material such as a magnesium alloy plate having such a thickness and excellent plastic workability, a manufacturing method thereof, and a plastic work material such as a press work material produced using this plate have not been sufficiently studied.
- a thick magnesium alloy plate can be obtained by using a die casting method or a thixo mold method.
- casting materials such as die-cast materials
- internal defects such as nests are likely to exist, and the composition and structure are not uniform, such as locally high concentrations of additive element components and random orientation of crystal grains. It is easy to become.
- a cast material such as a die-cast material
- precipitates are likely to precipitate at the grain boundaries.
- Casting materials such as die-cast materials are inferior in plastic workability such as press work, because the defect portion and the precipitates at the crystal grain boundaries are the starting points of fracture.
- a cast material such as a die-cast material is inferior in mechanical properties such as strength and hardness to a plastic material such as a press-worked material due to the above internal defects.
- one of the objects of the present invention is to provide a magnesium alloy material that is thick and excellent in plastic workability, and a thick magnesium alloy material that has undergone plastic working.
- Another object of the present invention is to provide a method for producing a magnesium alloy material from which a magnesium alloy material having a large thickness and excellent plastic workability can be obtained.
- magnesium alloy materials that have been subjected to plastic processing are the same by reducing defects during casting and making crystals finer. Even with this composition, mechanical properties such as strength, hardness and toughness, corrosion resistance, and plastic workability are excellent.
- a magnesium alloy material obtained by subjecting the magnesium alloy material subjected to the primary processing to plastic processing (secondary processing) such as press working is also excellent in the mechanical characteristics and corrosion resistance.
- a continuous cast material produced by a continuous casting method such as a twin roll casting method is used as a raw material of the primary processing material
- the continuous cast material has less segregation and coarse crystal precipitates than a die cast material, Excellent plastic workability.
- the present inventors rolled the continuous cast material under various conditions to produce a thick magnesium alloy plate having a thickness of 1.5 mm or more, and investigated its plastic workability.
- the rolled material (rolled plate) of the magnesium alloy generally has a texture in which the bottom surface of the magnesium alloy crystal is oriented parallel to the rolling direction (the direction in which the rolled material proceeds). If the degree of integration in the texture is strong, there is a drawback that the formability is impaired during plastic working such as press working.
- the inventors of the present invention (1) when the texture in the surface side portion of the rolled plate is stronger than the texture in the inner portion of the rolled plate, the decrease in formability (plastic workability) is large.
- the magnesium alloy material of the present invention is made of a magnesium alloy, has a plate-like portion having a thickness of 1.5 mm or more, and the plate-like portion satisfies the following orientation.
- the area from the surface of the plate-shaped part to 1/4 of the thickness in the thickness direction is the surface area, the remaining area is the internal area,
- the X-ray diffraction peak intensities of the (002) plane, (100) plane, (101) plane, (102) plane, (110) plane, and (103) plane in the surface region are respectively I F (002), I F (100), I F (101), I F (102), I F (110), and I F (103),
- the peak intensities of X-ray diffraction of the (002) plane, (100) plane, (101) plane, (102) plane, (110) plane, and (103) plane in the internal region are I C (002), I C (100), I C (101), I C (102), I C (110), and I C (103) Orientation degree of (002) plane in the
- the said magnesium alloy material of this invention can be manufactured with the following this invention manufacturing method, for example.
- the method for producing a magnesium alloy material according to the present invention relates to a method for producing a magnesium alloy material by rolling a material made of a magnesium alloy, and includes the following preparation step and rolling step.
- Preparation step A step of preparing a plate-like material obtained by continuously casting a molten magnesium alloy by a twin roll casting method.
- Rolling step A step of producing a plate-like magnesium alloy material having a thickness of 1.5 mm or more by subjecting the material to rolling in a plurality of passes. In this rolling process, at least one pass of rolling with a reduction rate of 25% or more per pass is performed, and the reduction rate of each remaining pass is set to 10% or more.
- the rolling reduction (%) means ⁇ (thickness t b of material before rolling ⁇ thickness t a of material after rolling) / thickness t b of material before rolling ⁇ ⁇ 100.
- the reduction rate per pass is 25% by using a continuous casting material that has few or substantially no defects, crystal precipitates, segregation, or the like as a starting point such as cracks.
- the relatively strong rolling as described above can be performed satisfactorily.
- plastic working can be performed uniformly over the entire region in the thickness direction of the material. That is, by performing at least one pass of rolling with a high rolling reduction, uniform processing can be performed from the surface of the material to the inside. Therefore, according to the manufacturing method of the present invention, a magnesium alloy material (typically a rolled plate (one form of the magnesium alloy material of the present invention)) having a uniform structure over the entire region in the thickness direction can be obtained.
- This structure is a texture that is arranged mainly so that the bottom surface of the magnesium alloy crystal is parallel to the rolling direction (a texture that is arranged so that the c-axis of the crystal is perpendicular to the rolling direction).
- the magnesium alloy material of the present invention is a rolled plate subjected to the above-described specific rolling (that is, when the entire magnesium alloy material of the present invention is composed of a plate-shaped portion), the thickness thereof as described above. It is composed of a uniform structure over the entire area (surface to center to surface). By being composed of such a uniform structure, the magnesium alloy material of the present invention is excellent in plastic workability such as press working while being thick. Therefore, this plate-like magnesium alloy material can be suitably used as a material for plastic working such as press working. In addition, this magnesium alloy material is composed of a uniform structure, and thus has uniform characteristics (mechanical characteristics such as hardness, strength, impact resistance, toughness, corrosion resistance, vibration damping, etc.).
- a plastic working material such as a press working material having excellent dimensional accuracy can be obtained.
- the obtained plastic working material is also composed of a uniform structure over the entire region in the thickness direction, that is, substantially maintains the structure of the material. Therefore, the obtained plastic working material such as press working material also has the above-mentioned uniform characteristics.
- the internal region with respect to the average crystal grain size D F of the surface region is The ratio of the average crystal grain diameter D c in the region: D c / D F satisfies 2/3 ⁇ D c / D F ⁇ 3/2, and D F and D c ⁇ 3.5 ⁇ m .
- the plastic workability is more excellent.
- the internal to the Vickers hardness H F of the surface region may include forms that satisfies 0.85 ⁇ H c / H F ⁇ 1.2.
- the said process when performing surface treatments, such as a chemical conversion treatment, in the post process, the said process can be performed stably.
- the magnesium alloy material of the present invention can be composed of magnesium alloys (remainder Mg and impurities) containing various elements as additive elements.
- alloys with high concentrations of additive elements specifically magnesium alloys with a total content of 5.0% by mass or more, depend on the type of additive elements, but mechanical properties such as strength and hardness, corrosion resistance, and flame resistance Excellent in various properties such as heat resistance.
- Specific additive elements are selected from Al, Zn, Mn, Si, Be, Ca, Sr, Y, Cu, Ag, Sn, Li, Zr, Ce, Ni, Au, and rare earth elements (excluding Y and Ce) And at least one element.
- the impurity include Fe.
- Mg-Al alloys containing Al are excellent in corrosion resistance and mechanical properties such as strength and hardness. Therefore, as an embodiment of the magnesium alloy material of the present invention, an embodiment in which the magnesium alloy contains 5.0% by mass or more and 12% by mass or less of Al as an additive element.
- the upper limit is preferably 12% by mass, and more preferably 11% by mass.
- the form containing Al of 8.3 mass% to 9.5 mass% is superior in strength and corrosion resistance.
- the total content of each element other than Al is 0.01% by mass or more and 10% by mass or less, preferably 0.1% by mass or more and 5% by mass or less.
- Mg-Al alloy in ASTM standard (Mg-Al-Zn alloy, Zn: 0.2 mass% to 1.5 mass%, for example, AZ31 alloy, AZ61 alloy, AZ91 alloy Etc.), AM alloys (Mg-Al-Mn alloys, Mn: 0.15% to 0.5% by mass), AS alloys (Mg-Al-Si alloys, Si: 0.01% to 20% by mass), Mg -Al-RE (rare earth element) alloy, AX alloy (Mg-Al-Ca alloy, Ca: 0.2 mass% to 6.0 mass%), AJ alloy (Mg-Al-Sr alloy, Sr: 0.2 mass) % To 7.0% by mass).
- ASTM standard Mg-Al-Zn alloy, Zn: 0.2 mass% to 1.5 mass%
- AS alloys Mg-Al-Si alloys, Si: 0.01% to 20% by mass
- Mg -Al-RE rare earth element
- AX alloy Mg-Al-Ca alloy
- the magnesium alloy with the balance being Mg and impurities is excellent in heat resistance and flame retardancy.
- the rare earth element is contained, the total content is preferably 0.1% by mass or more, and particularly when Y is contained, the content is preferably 0.5% by mass or more.
- the magnesium alloy material of the present invention is thick and has excellent plastic workability.
- the manufacturing method of the magnesium alloy material of the present invention can manufacture a magnesium alloy material that is thick and excellent in plastic workability.
- the magnesium alloy material of the present invention is composed of a magnesium alloy containing 50% by mass or more of Mg and typically the additive elements described above.
- the plate-like portion provided in the magnesium alloy material of the present invention has a pair of parallel surfaces, and the interval between both surfaces (distance between both surfaces) is substantially uniform, that is, a portion where the thickness is uniform.
- the magnesium alloy material of the present invention has a plate-like part in a part thereof, the cutting process such as a form in which a boss is joined to the other part, a form having a groove, a form having a hole penetrating the front and back, etc.
- a typical form of the magnesium alloy material of the present invention having the above plate-like portion includes a form (magnesium alloy plate) that is entirely plate-like.
- the shape (planar shape) of the magnesium alloy plate can take various shapes such as a rectangle and a circle.
- this magnesium alloy plate can take any form of the coil material which wound up the continuous long material, and the short material of predetermined length and shape.
- This magnesium alloy plate can take various forms depending on the manufacturing process. Typically, a rolled plate, a heat-treated plate or a straightened plate subjected to heat treatment or correction described later, a rolled plate, a heat-treated plate, a polished plate obtained by polishing or coating the straightened plate, a coated plate, or the like can be given. .
- the magnesium alloy material of the present invention is a molded body obtained by subjecting the magnesium alloy sheet to plastic processing (secondary processing) such as press working such as bending or drawing, and the plastic working is partially applied to the plastic.
- plastic processing secondary processing
- Examples include a partially processed material having a processed part (however, at least a part of the plate-shaped part is included).
- the molded body is, for example, a cross-sectional box having a top plate portion (bottom surface portion) and a side wall portion erected from the periphery of the top plate portion, a frame-like frame body, and the top plate portion being a disc.
- a covered cylindrical body having a cylindrical side wall portion may be used. At least the top plate portion corresponds to a plate-like portion.
- the form of the magnesium alloy material can be selected.
- the plate-like portion has a thickness of 1.5 mm or more.
- the thickness an arbitrary value of 1.5 mm or more can be selected according to a desired application.
- the thickness is 10 mm or less, particularly 5 mm or less because a thick rolled plate (one form of the magnesium alloy material of the present invention) can be produced with high productivity.
- the portion where the deformation due to plastic processing is small is the structure of the magnesium alloy plate that is the material of the plastic processing. And generally maintain mechanical properties.
- One feature of the magnesium alloy material of the present invention is that at least the plate-like portion is composed of a structure having a uniform texture throughout the entire thickness direction.
- a form in which the ratio of the bottom peak ratio O F / O c described above satisfies 1.00 ⁇ O F / O c ⁇ 1.05 is particularly excellent in plastic workability.
- the obtained plastic working material (molded body) and the partially processed material have small variations in mechanical characteristics throughout the whole.
- a typical form of the magnesium alloy material of the present invention includes a form in which the crystal grain size is uniform over the entire region in the thickness direction as described above.
- a plastic working such as press working
- a plastic working material (molded body) or a partially processed material that can be uniformly deformed and has excellent dimensional accuracy can be obtained.
- the obtained plastic working material (molded body) and the partially processed material have small variations in mechanical characteristics throughout the whole.
- the particle size is uniform and fine throughout the entire thickness direction.
- the minimum value of the average crystal particle size is about 3.5 ⁇ m.
- the average crystal grain size of the plate-like part is preferably 20 ⁇ m or less, particularly preferably 10 ⁇ m or less.
- the average crystal grain size varies depending on the rolling reduction in the rolling process and the heating temperature of the material, and tends to be smaller as the rolling reduction is higher and the heating temperature is lower. Further, the average crystal grain size of the surface region where plastic working is easily applied during rolling tends to be smaller than that of the internal region.
- the magnesium alloy material of the present invention is superior in mechanical properties such as strength, hardness, toughness and the like in the thickness direction as compared with a cast material such as a die-cast material due to rolling. And uniformly having the mechanical characteristics.
- the Vickers hardness is a uniform value. Since the higher the mechanical weak point difference Vickers hardness is small in the surface region and the interior region (low hardness portion) is not substantially present, the ratio of the Vickers hardness (Hv): H c / H F is 0.95 ⁇ H c / H F ⁇ 1.1 is more preferable.
- the absolute value of the Vickers hardness depends on rolling conditions such as the rolling reduction and the heating temperature of the material, the absolute value of Vickers hardness tends to increase as the content of the additive element increases.
- the Vickers hardness of the surface region where plastic working is easily performed during rolling tends to be larger than that of the internal region.
- the magnesium alloy material of the present invention is a plastically processed material (molded body) or a partially processed material, the hardness tends to further increase due to work hardening.
- the corrosion resistance is excellent. Moreover, if it is set as the form which provides a coating layer by coating at least one part of the surface of this invention magnesium alloy material, designability and commercial value can be improved.
- twin roll method there are various continuous casting methods such as a twin roll method, a twin belt method, and a belt-and-wheel method
- twin roll method and the twin belt method are suitable for the production of a plate-shaped cast material.
- the thickness, width, and length of the cast material can be appropriately selected so that a desired rolled material (rolled plate) can be obtained. Since the thickness of the cast material is likely to be segregated if it is too thick, it is preferably 10 mm or less, particularly preferably 5 mm or less.
- the obtained continuous cast material is a long material, it is easy to transport to the next step if it is wound into a cylindrical shape to form a coil material. If the part immediately before winding in the cast material is wound in a state heated to about 100 ° C to 200 ° C, the content of additive elements such as AZ91 alloy is high, and even an alloy type that is prone to cracking becomes easy to bend. Even when the take-up diameter is small, it can be wound up without causing cracks.
- a sheet material obtained by cutting the obtained continuous cast material into an appropriate length can be used as a rolling material. In this case, a rolled material (rolled sheet) having a predetermined length is obtained.
- the composition of the cast material can be homogenized or the toughness can be enhanced by sufficiently dissolving an element such as Al.
- the solution treatment conditions include heating temperature: 350 ° C. or higher, particularly 380 ° C. or higher and 420 ° C. or lower, holding time: 1 hour or longer and 40 hours or shorter.
- the holding time it is preferable that the holding time be longer as the Al content is higher.
- the cooling rate is increased (preferably 50 ° C./min or more), so that coarse precipitates Precipitation can be suppressed.
- the cast material or solution treatment material is used as a raw material, and this material is subjected to multiple passes of rolling. It is preferable that at least one pass includes warm rolling or hot rolling performed by heating a raw material (a cast material, a solution treatment material, a processed material during rolling) to 150 ° C. or more and 400 ° C. or less.
- a raw material a cast material, a solution treatment material, a processed material during rolling
- the heating temperature is preferably 350 ° C. or lower, more preferably 300 ° C. or lower, and particularly preferably 150 ° C. or higher and 280 ° C. or lower. You may heat not only a raw material but a rolling roll. Examples of the heating temperature of the rolling roll include 100 ° C. to 250 ° C.
- rolling with a reduction rate of 25% or more per pass is performed by one pass or multiple passes.
- the high work rolling with such a high rolling reduction is preferably the warm rolling or hot rolling.
- the higher the rolling reduction the more plastic processing can be performed from the surface of the material to the inside, and a rolled material with a uniform structure can be obtained. Therefore, the rolling reduction of strong work rolling is 30% or more per pass. Preferably, it can select suitably in the range in which a crack does not arise in a raw material.
- the rolling reduction rate of each pass other than the high-strength rolling (hereinafter referred to as general rolling) is 10% or more, the rolling is performed uniformly and sufficiently over the entire thickness direction of the material. be able to.
- the higher the rolling reduction of each pass of general rolling the more plastic processing can be performed, so that it can be made 15% or more, and further 20% or more per pass.
- the number of passes and the rolling reduction of the high work rolling / general rolling can be appropriately selected according to the total rolling reduction.
- Conditions such as the heating temperature of the material, the temperature of the rolling roll, and the rolling reduction can be changed for each pass. Therefore, the rolling reduction rate of each pass may be the same or different.
- intermediate heat treatment may be performed between passes. By performing the intermediate heat treatment, it is possible to remove and reduce distortions, residual stresses, and the like introduced into the material before the heat treatment, and to easily perform rolling after the heat treatment.
- the conditions for the intermediate heat treatment include heating temperature: 150 ° C. to 350 ° C. (preferably 300 ° C. or less, more preferably 250 ° C. to 280 ° C., holding time: 0.5 hour to 3 hours).
- the frictional resistance during rolling can be reduced, and the material can be prevented from being seized and easily rolled.
- edge of the cast material before rolling may be trimmed to prevent the crack from progressing when the edge is cracked during rolling. You may trim in order to adjust suitably.
- polishing it is possible to remove and reduce the lubricant used during rolling, scratches and oxide films present on the surface of the rolled material, and the like.
- polishing it is preferable to use a grinding belt because it can be easily and continuously polished even if the material is a long material.
- the polishing is preferably wet in order to prevent the powder from scattering.
- ⁇ Correction ⁇ Correction may be performed after the rolling or after the polishing. By performing the correction, the flatness can be improved, and plastic processing such as press processing can be performed with high accuracy.
- a roll leveler device in which a plurality of rollers are arranged in a staggered manner can be suitably used. The correction may be performed, for example, in a state where the material is heated to 100 ° C. to 300 ° C., particularly 150 ° C. to 280 ° C. (warm correction).
- the magnesium alloy material of the present invention is a partially processed material having a molded body or a plastic processing portion, at least a part of the material that has undergone the rolling process described above (rolled material, abrasive material, correction material described above) and so on. It can be manufactured by a manufacturing method including a plastic processing step for performing plastic processing.
- This plastic working is preferably performed at a temperature range of 200 ° C. to 300 ° C., because the plastic workability of the material is improved.
- heat treatment can be performed after the plastic working to remove strain and residual stress introduced by the plastic working and to improve the mechanical characteristics.
- the heat treatment conditions include a heating temperature: 100 ° C. to 300 ° C. and a heating time: about 5 minutes to 60 minutes.
- the magnesium alloy material of the present invention is provided with the anticorrosion layer and the coating layer, at least a part of the material that has undergone the rolling process described above, or at least a part of the material that has undergone the plastic working process, It can manufacture by the manufacturing method which comprises the surface treatment process which performs.
- at least one kind of processing selected from hairline processing, diamond cutting processing, shot blasting processing, etching processing, and spin cutting processing may be applied to at least a part of the material.
- Test example A material composed of a magnesium alloy having the following composition was rolled under various conditions to produce a magnesium alloy plate having a thickness of 1.5 mm or more, and the orientation, crystal grain size, and Vickers hardness were examined.
- magnesium alloy of the above composition create a long cast plate (thickness 4.5mm (4.50mm to 4.51mm) x width 320mm) by twin-roll continuous casting method, and wind it up once to cast the cast coil material Produced.
- Each cast coil material was subjected to a solution treatment at 400 ° C. for 24 hours.
- the material obtained by rewinding the solid solution coil material that has undergone solution treatment is rolled in multiple passes under the rolling conditions shown in Table 1, and the thickness is 2.0 mm (2.00 mm to 2.01 mm) or 1.5 mm (1.50 mm to 1.51).
- mm) rolled material magnesium alloy plate).
- Each pass was warm-rolled (material heating temperature: 250 ° C to 280 ° C, rolling roll temperature: 100 ° C to 250 ° C).
- the thickness of the cast material, the thickness of the processed material in the middle of rolling, and the thickness of the obtained magnesium alloy plate are all 50 mm from the center in the width direction of the plate to be measured and both edges in the width direction. It was set as the average of the thickness of a total of three points.
- the average crystal grain size ( ⁇ m) of the inner region and the surface region was measured based on “steel—microscopic test method of crystal grain size JIS G 0551 (2005)”.
- a cross section in the thickness direction is taken for each magnesium alloy plate, each cross section is observed with an optical microscope (400 times), and the surface region in each cross section (from the surface to the thickness direction) 3 areas (up to 1/4 of the thickness) and internal areas (remaining areas excluding the surface area), 3 fields of view (total number of fields of view: 6), average grain size for each field of view Asked.
- Table 2 shows the average value (D F ) of the average crystal grain size of the total six views in the surface region and the average value (D C ) of the average crystal grain size of the total six views in the internal region. Further, the ratio of the average crystal grain size D c in the inner region to the average crystal grain size D F in the surface region: D c / DF was also obtained. The results are shown in Table 2.
- the continuous cast material is subjected to both rolling with a rolling reduction of 25% or more per pass and rolling with a rolling reduction of 10% or more per pass. It can be seen that a magnesium alloy plate (magnesium alloy material) having a thickness of 1.5 mm or more, having a specific orientation and having a uniform structure in the thickness direction can be obtained. . It can also be seen that this magnesium alloy plate has uniform mechanical properties.
- Each of the obtained magnesium alloy plates was pressed.
- the press working conditions were a heating temperature of the magnesium alloy plate: 250 ° C. to 270 ° C.
- sample Nos. A, B, D, E, G, H, J, and K having a specific orientation and a uniform structure in the thickness direction are excellent in press workability.
- the dimensional accuracy was excellent.
- the structure of the flat portion was examined in these sample Nos. A, B, D, E, G, H, J, and K, it was substantially the same as the structure of each magnesium alloy plate before press working.
- the specific orientation and the average crystal grain size were as described above.
- the above-described embodiment can be appropriately changed without departing from the gist of the present invention, and is not limited to the above-described configuration.
- the composition of the magnesium alloy, the thickness and shape of the magnesium alloy material, the rolling reduction of each pass in the rolling process, the number of passes, and the like can be changed as appropriate.
- the magnesium alloy material of the present invention can be used for members in various fields such as automobile parts, railway vehicle parts, aircraft parts, bicycle parts, parts of various electronic / electrical devices, constituent materials of the members, bags, etc. It can be suitably used.
- the manufacturing method of this invention magnesium alloy material can be utilized suitably for manufacture of the said this invention magnesium alloy material.
Landscapes
- 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
Description
[配向性]
上記板状部の表面から厚さ方向に厚さの1/4までの領域を表面領域、残部の領域を内部領域とし、
上記表面領域における(002)面、(100)面、(101)面、(102)面、(110)面、及び(103)面のX線回折のピーク強度をそれぞれIF(002)、IF(100)、IF(101)、IF(102)、IF(110)、及びIF(103)とし、
上記内部領域における(002)面、(100)面、(101)面、(102)面、(110)面、及び(103)面のX線回折のピーク強度をそれぞれIC(002)、IC(100)、IC(101)、IC(102)、IC(110)、及びIC(103)とし、
上記表面領域における(002)面の配向度合い:IF(002)/{IF(100)+IF(002)+IF(101)+IF(102)+IF(110)+IF(103)}を底面ピーク比OF、
上記内部領域における(002)面の配向度合い:IC(002)/{IC(100)+IC(002)+IC(101)+IC(102)+IC(110)+IC(103)}を底面ピーク比OCとするとき、
上記内部領域の底面ピーク比Ocに対する上記表面領域の底面ピーク比OFの比率:OF/Ocが、0.95≦OF/Oc≦1.05を満たす。
準備工程:溶解したマグネシウム合金を双ロール鋳造法により連続鋳造した板状の素材を準備する工程。
圧延工程:上記素材に複数パスの圧延を施して、厚さ1.5mm以上の板状のマグネシウム合金材を製造する工程。
この圧延工程では、1パスあたりの圧下率が25%以上の圧延を少なくとも1パス行い、残りの各パスの圧下率を10%以上とする。
なお、圧下率(%)とは、{(圧延前の素材の厚さtb-圧延後の素材の厚さta)/圧延前の素材の厚さtb}×100をいう。
[マグネシウム合金材]
(組成)
本発明マグネシウム合金材は、50質量%以上のMgと、代表的には上述した添加元素とを含有するマグネシウム合金により構成される。
本発明マグネシウム合金材に具える板状部とは、平行する一対の面を具え、両面の間隔(両面の間の距離)が実質的に均一である、即ち、厚さが均一である部分を言う。本発明マグネシウム合金材は、その一部に板状部を有していれば、その他部に、ボスなどが接合された形態、溝を有する形態、表裏に貫通する孔を有する形態など、切削加工などの加工により、局所的に厚さが異なる部分を有する形態を許容する。
本発明マグネシウム合金材は、上記板状部の厚さが1.5mm以上であることを特徴の一つとする。この厚さは、所望の用途などに応じて、1.5mm以上の任意の値を選択することができる。但し、上記板状部を厚くするには、素材となる鋳造材も厚くする必要がある。鋳造材を厚くすると、上述のように欠陥などで圧延性の低下を招く。従って、上記厚さは10mm以下、特に5mm以下であると、肉厚の圧延板(本発明マグネシウム合金材の一形態)を生産性よく製造できて好ましい。
<配向性>
本発明マグネシウム合金材は、少なくとも上記板状部がその厚さ方向の全域に亘って均一的な集合組織を有する組織から構成されることを特徴の一つとする。上述した底面ピーク比の比率OF/Ocが特に1.00≦OF/Oc≦1.05を満たす形態は、塑性加工性により優れる。また、得られた塑性加工材(成形体)や部分加工材はその全体に亘って機械的特性のばらつきが小さい。
本発明マグネシウム合金材の代表的な形態として、上述のように厚さ方向の全域に亘って、結晶粒径が均一的な大きさである形態が挙げられる。この形態は、プレス加工などの塑性加工を施した際、均一的に変形でき、寸法精度に優れる塑性加工材(成形体)や部分加工材が得られる。表面領域と内部領域とにおいて平均結晶粒径の差が小さいほど塑性加工を均一的に行えると期待されるため、上述した平均結晶粒径の比率:Dc/DFが特に1≦Dc/DF≦1.4を満たす形態は、塑性加工性により優れる。また、得られた塑性加工材(成形体)や部分加工材はその全体に亘って機械的特性のばらつきが小さい。
本発明マグネシウム合金材は、圧延が施されていることでダイカスト材などの鋳造材に比較して、強度や硬度、靭性などの機械的特性にも優れる上に、その厚さ方向の全域に亘って、その機械的特性を均一的に有する。例えば、上述のようにビッカース硬度が均一的な値である。表面領域と内部領域とにおいてビッカース硬度の差が小さいほど機械的弱点(低硬度部分)が実質的に存在しなくなるため、ビッカース硬度(Hv)の比率:Hc/HFは0.95≦Hc/HF≦1.1がより好ましい。ビッカース硬度の絶対値は、圧下率や素材の加熱温度などの圧延条件にもよるが、添加元素の含有量が多いほど、大きくなる傾向にある。なお、圧延時に塑性加工が十分に施され易い表面領域のビッカース硬度は、内部領域よりも大きくなる傾向にある。本発明マグネシウム合金材が塑性加工材(成形体)や部分加工材である場合、加工硬化により、硬度が更に高まる傾向にある。
本発明マグネシウム合金材の表面の少なくとも一部に化成処理や陽極酸化処理といった防食処理を施して防食層を具える形態とすると、耐食性により優れる。また、本発明マグネシウム合金材の表面の少なくとも一部に塗装を施して塗装層とを具える形態とすると、意匠性や商品価値を高められる。
以下、上述した本発明製造方法の各工程をより詳細に説明する。
(準備工程)
<鋳造>
本発明製造方法では、出発材に連続鋳造材を利用する。連続鋳造法は、急冷凝固が可能であるため、添加元素の含有量が多い場合でも偏析や酸化物などを低減でき、割れの起点になり得る10μm超といった粗大な晶析出物の生成を抑制できる。従って、圧延などの塑性加工性に優れる鋳造材が得られる。また、連続鋳造法では、長尺な鋳造材を連続して製造可能であり、当該連続鋳造法によって得られた長尺材を圧延の素材に利用できる。素材が長尺である場合、長尺な圧延材を製造可能である。連続鋳造法には、双ロール法、ツインベルト法、ベルトアンドホイール法といった種々の方法があるが、板状の鋳造材の製造には、双ロール法やツインベルト法、特に双ロール法が好適であり、とりわけ特許文献1に記載の鋳造方法で製造した連続鋳造材を利用することが好ましい。鋳造材の厚さ、幅、長さは所望の圧延材(圧延板)が得られるように適宜選択することができる。鋳造材の厚さは、厚過ぎると偏析が生じ易いため、10mm以下、特に5mm以下が好ましい。得られた連続鋳造材を長尺材とする場合、円筒状に巻き取ってコイル材とすると、次工程に搬送し易い。鋳造材における巻き取り直前の箇所を100℃~200℃程度に加熱した状態で巻き取ると、AZ91合金といった添加元素の含有量が高く、割れが生じ易い合金種であっても曲げ易くなり、巻き取り径が小さい場合でも、割れなどを生じることなく巻き取れる。得られた連続鋳造材を適宜な長さに切断したシート材を圧延の素材とすることもできる。この場合、所定の長さの圧延材(圧延板)が得られる。
上記鋳造材に圧延を施す前に溶体化処理を施すと、鋳造材の組成を均質化したり、Alといった元素を十分に固溶させて靭性を高めたりできる。溶体化処理の条件は、例えば、加熱温度:350℃以上、特に380℃以上420℃以下、保持時間:1時間以上40時間以下が挙げられる。Mg-Al系合金である場合、Alの含有量が多いほど保持時間を長めにすることが好ましい。また、上記保持時間経過後、上記加熱温度からの冷却工程において、水冷や衝風といった強制冷却などを利用して、冷却速度を速めると(好ましくは50℃/min以上)、粗大な析出物の析出を抑制できる。
上記鋳造材や溶体化処理材を素材とし、この素材に複数パスの圧延を施す。少なくとも1パスは、素材(鋳造材や溶体化処理材、圧延途中の加工材)を150℃以上400℃以下に加熱して行う温間圧延、或いは熱間圧延を含むことが好ましい。素材を上記温度に加熱することで、1パスあたりの圧下率を高めた場合にも圧延中に割れなどが生じ難く、上記温度を高めるほど、割れなどが少なくなり、400℃以下とすることで、素材表面の焼付きなどによる劣化や、圧延ロールの熱劣化を抑制することができる。従って、上記加熱温度は、350℃以下、更に300℃以下、特に150℃以上280℃以下が好ましい。素材だけでなく圧延ロールも加熱してもよい。圧延ロールの加熱温度は、100℃~250℃が挙げられる。
≪研磨≫
上記圧延後、研磨を施してもよい。研磨を行うことで、圧延時に使用した潤滑剤や圧延材表面に存在するキズや酸化膜などを除去、低減できる。研磨には、研削ベルトを用いると、素材が長尺材であっても、連続して容易に研磨を施せて好ましい。また、研磨は、粉末の飛散を防止するために湿式が好ましい。
上記圧延後や上記研磨後、矯正を施してもよい。矯正を行うことで平坦性を高められ、プレス加工などの塑性加工を精度良く行える。矯正には、複数のローラが千鳥状に配置されたロールレベラ装置を好適に利用できる。また、矯正は、例えば、素材を100℃~300℃、特に150℃~280℃に加熱した状態(温間矯正)で行ってもよい。
上記本発明マグネシウム合金材を成形体や塑性加工部を具える部分加工材とする場合、上述した圧延工程を経た素材(上述した圧延材、研磨材、矯正材)の少なくとも一部にプレス加工といった塑性加工を施す塑性加工工程を具える製造方法により、製造することができる。この塑性加工は、200℃~300℃の温度域で行うと、素材の塑性加工性を高められて好ましい。また、この塑性加工後に熱処理を施して、塑性加工により導入された歪みや残留応力の除去、機械的特性の向上を図ることができる。この熱処理条件は、加熱温度:100℃~300℃、加熱時間:5分~60分程度が挙げられる。
上記本発明マグネシウム合金材を上記防食層や塗装層を具える形態とする場合、上述した圧延工程を経た素材の少なくとも一部、或いは上記塑性加工工程を経た素材の少なくとも一部に防食処理や塗装を施す表面処理工程を具える製造方法により、製造することができる。その他、上記素材の少なくとも一部に、ヘアライン加工、ダイヤカット加工、ショットブラスト加工、エッチング加工及びスピンカット加工から選択される少なくとも1種の加工を施してもよい。これらの表面処理を行うことで、耐食性や機械的保護機能を高めたり、意匠性や金属質感、商品価値を高めたりすることができる。
[試験例]
以下の組成のマグネシウム合金からなる素材に、種々の条件で圧延を施して厚さ1.5mm以上のマグネシウム合金板を作製し、配向性、結晶粒径、及びビッカース硬度を調べた。
得られた各マグネシウム合金板についてX線回折を行い、内部領域の底面ピーク比Ocに対する表面領域の底面ピーク比OFの比率:OF/Ocを調べた。その結果を表2に示す。表面領域の底面ピーク比OFは、各マグネシウム合金板の表面に対してX線回折を行い、内部領域の底面ピーク比Ocは、各マグネシウム合金板の表面から厚さ方向に厚さの1/4までの領域(表面領域)を化学的に除去して、内部を露出させ、この露出面に対してX線回折を行った。そして、各領域の(002)面、(100)面、(101)面、(102)面、(110)面、及び(103)面のピーク強度をそれぞれ測定し、この測定結果を利用してOF/Ocを求めた。
底面ピーク比OF:IF(002)/{IF(100)+IF(002)+IF(101)+IF(102)+IF(110)+IF(103)}
底面ピーク比OC:IC(002)/{IC(100)+IC(002)+IC(101)+IC(102)+IC(110)+IC(103)}
得られた各マグネシウム合金板について内部領域及び表面領域の平均結晶粒径(μm)を「鋼-結晶粒度の顕微鏡試験方法 JIS G 0551(2005)」に基づいて測定した。ここでは、各マグネシウム合金板に対して厚さ方向の断面(横断面及び縦断面)をとり、各断面を光学顕微鏡で観察し(400倍)、上記各断面における表面領域(表面から厚さ方向に厚さの1/4までの領域)、及び内部領域(表面領域を除いた残部の領域)のそれぞれについて3視野ずつとり(各領域の合計視野数:6)、視野ごとに平均結晶粒径を求めた。表面領域における合計6視野の平均結晶粒径の平均値(DF)、内部領域における合計6視野の平均結晶粒径の平均値(DC)を表2に示す。また、表面領域の平均結晶粒径DFに対する内部領域の平均結晶粒径Dcの比率:Dc/DFも求めた。その結果を表2に示す。
得られた各マグネシウム合金板について内部領域及び表面領域のビッカース硬度(Hv)を調べた。ビッカース硬度は、平均結晶粒径の測定と同様に、各マグネシウム合金板に対して厚さ方向の断面(横断面及び縦断面)をとり、表面領域のビッカース硬度HFは、上記各断面における表面領域に圧子を押し当てて測定し、内部領域のビッカース硬度HFは、上記各断面における内部領域に圧子を押し当てて測定した。表面領域における上記両断面のビッカース硬度の平均値(HF)、内部領域における上記両断面のビッカース硬度の平均値(HC)を表2に示す。また、表面領域のビッカース硬度HFに対する内部領域のビッカース硬度Hcの比率:Hc/HFも求めた。その結果を表2に示す。
Claims (5)
- マグネシウム合金からなり、板状部を有するマグネシウム合金材であって、
前記板状部の厚さが1.5mm以上であり、
前記板状部は、以下の配向性を満たすことを特徴とするマグネシウム合金材。
[配向性]
前記板状部の表面から厚さ方向に厚さの1/4までの領域を表面領域、残部を内部領域とし、
前記表面領域における(002)面、(100)面、(101)面、(102)面、(110)面、及び(103)面のX線回折のピーク強度をそれぞれIF(002)、IF(100)、IF(101)、IF(102)、IF(110)、及びIF(103)とし、
前記内部領域における(002)面、(100)面、(101)面、(102)面、(110)面、及び(103)面のX線回折のピーク強度をそれぞれIC(002)、IC(100)、IC(101)、IC(102)、IC(110)、及びIC(103)とし、
前記表面領域における(002)面の配向度合い:IF(002)/{IF(100)+IF(002)+IF(101)+IF(102)+IF(110)+IF(103)}を底面ピーク比OF、
前記内部領域における(002)面の配向度合い:IC(002)/{IC(100)+IC(002)+IC(101)+IC(102)+IC(110)+IC(103)}を底面ピーク比OCとするとき、
前記内部領域の底面ピーク比Ocに対する前記表面領域の底面ピーク比OFの比率:OF/Ocが、0.95≦OF/Oc≦1.05を満たす。 - 前記表面領域の平均結晶粒径をDF、前記内部領域の平均結晶粒径をDcとするとき、前記表面領域の平均結晶粒径DFに対する前記内部領域の平均結晶粒径Dcの比率:Dc/DFが、2/3≦Dc/DF≦3/2を満たし、かつ、DF及びDc≧3.5μmであることを特徴とする請求項1に記載のマグネシウム合金材。
- 前記表面領域のビッカース硬度(Hv)をHF、前記内部領域のビッカース硬度(Hv)をHcとするとき、前記表面領域のビッカース硬度HFに対する前記内部領域のビッカース硬度Hcの比率:Hc/HFが、0.85≦Hc/HF≦1.2を満たすことを特徴とする請求項1又は2に記載のマグネシウム合金材。
- 前記マグネシウム合金は、添加元素にAlを5.0質量%以上12質量%以下含有することを特徴とする請求項1~3のいずれか1項に記載のマグネシウム合金材。
- マグネシウム合金からなる素材に圧延を施してマグネシウム合金材を製造するマグネシウム合金材の製造方法であって、
溶解したマグネシウム合金を双ロール鋳造法により連続鋳造した板状の素材を準備する準備工程と、
前記素材に複数パスの圧延を施して、厚さ1.5mm以上の板状のマグネシウム合金材を製造する圧延工程とを具え、
前記圧延工程では、1パスあたりの圧下率が25%以上の圧延を少なくとも1パス行い、残りの各パスの圧下率を10%以上とすることを特徴とするマグネシウム合金材の製造方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112012000994.0T DE112012000994T5 (de) | 2011-02-24 | 2012-02-23 | Magnesiumlegierungsmaterial und Verfahren zu dessen Erzeugung |
CN201280009108.6A CN103370433B (zh) | 2011-02-24 | 2012-02-23 | 镁合金材料及其制造方法 |
KR1020137020341A KR101885397B1 (ko) | 2011-02-24 | 2012-02-23 | 마그네슘 합금재 및 그의 제조 방법 |
US14/001,646 US20130337282A1 (en) | 2011-02-24 | 2012-02-23 | Magnesium alloy and manufacturing method for same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011038888A JP5757104B2 (ja) | 2011-02-24 | 2011-02-24 | マグネシウム合金材及びその製造方法 |
JP2011-038888 | 2011-02-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012115190A1 true WO2012115190A1 (ja) | 2012-08-30 |
Family
ID=46720964
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/054418 WO2012115190A1 (ja) | 2011-02-24 | 2012-02-23 | マグネシウム合金材及びその製造方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20130337282A1 (ja) |
JP (1) | JP5757104B2 (ja) |
KR (1) | KR101885397B1 (ja) |
CN (1) | CN103370433B (ja) |
DE (1) | DE112012000994T5 (ja) |
TW (1) | TW201247889A (ja) |
WO (1) | WO2012115190A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014180187A1 (zh) * | 2013-05-07 | 2014-11-13 | 宝山钢铁股份有限公司 | 一种低成本细晶弱织构镁合金薄板及其制造方法 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5757105B2 (ja) * | 2011-02-24 | 2015-07-29 | 住友電気工業株式会社 | マグネシウム合金材及びその製造方法 |
KR101449180B1 (ko) * | 2012-12-21 | 2014-10-08 | 주식회사 포스코 | 고강도강의 형상 교정 및 압연 방법과 형상 교정 장치 |
JP6094867B2 (ja) * | 2013-01-24 | 2017-03-15 | 住友電気工業株式会社 | Mg合金の鋳造材の製造方法 |
WO2019189378A1 (ja) * | 2018-03-27 | 2019-10-03 | 日本碍子株式会社 | 窒化アルミニウム板 |
CN112831739B (zh) * | 2020-12-31 | 2022-01-28 | 长沙理工大学 | 通过轧制和锤击提高镁合金高温蠕变性能的加工方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006003899A1 (ja) * | 2004-06-30 | 2006-01-12 | Sumitomo Electric Industries, Ltd. | マグネシウム合金材の製造方法 |
JP2006239750A (ja) * | 2005-03-04 | 2006-09-14 | Sumitomo Metal Ind Ltd | マグネシウム合金の製造方法 |
JP2008163361A (ja) * | 2006-12-27 | 2008-07-17 | Mitsubishi Alum Co Ltd | 均一微細な結晶粒を有するマグネシウム合金薄板の製造方法 |
JP2009256706A (ja) * | 2008-04-15 | 2009-11-05 | Mitsubishi Alum Co Ltd | 成形加工用マグネシウム合金板およびその製造方法 |
JP2011025264A (ja) * | 2009-07-23 | 2011-02-10 | Mitsubishi Alum Co Ltd | マグネシウム板材のコイル圧延方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7454332B2 (en) | 2004-06-15 | 2008-11-18 | Microsoft Corporation | Gain constrained noise suppression |
JP2006239748A (ja) * | 2005-03-04 | 2006-09-14 | Sumitomo Metal Ind Ltd | マグネシウム合金の製造方法 |
JP4730601B2 (ja) * | 2005-03-28 | 2011-07-20 | 住友電気工業株式会社 | マグネシウム合金板の製造方法 |
JP4613965B2 (ja) * | 2008-01-24 | 2011-01-19 | 住友電気工業株式会社 | マグネシウム合金板材 |
JP5757105B2 (ja) * | 2011-02-24 | 2015-07-29 | 住友電気工業株式会社 | マグネシウム合金材及びその製造方法 |
-
2011
- 2011-02-24 JP JP2011038888A patent/JP5757104B2/ja not_active Expired - Fee Related
-
2012
- 2012-02-23 WO PCT/JP2012/054418 patent/WO2012115190A1/ja active Application Filing
- 2012-02-23 DE DE112012000994.0T patent/DE112012000994T5/de not_active Withdrawn
- 2012-02-23 US US14/001,646 patent/US20130337282A1/en not_active Abandoned
- 2012-02-23 CN CN201280009108.6A patent/CN103370433B/zh not_active Expired - Fee Related
- 2012-02-23 KR KR1020137020341A patent/KR101885397B1/ko active IP Right Grant
- 2012-02-24 TW TW101106247A patent/TW201247889A/zh unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006003899A1 (ja) * | 2004-06-30 | 2006-01-12 | Sumitomo Electric Industries, Ltd. | マグネシウム合金材の製造方法 |
JP2006239750A (ja) * | 2005-03-04 | 2006-09-14 | Sumitomo Metal Ind Ltd | マグネシウム合金の製造方法 |
JP2008163361A (ja) * | 2006-12-27 | 2008-07-17 | Mitsubishi Alum Co Ltd | 均一微細な結晶粒を有するマグネシウム合金薄板の製造方法 |
JP2009256706A (ja) * | 2008-04-15 | 2009-11-05 | Mitsubishi Alum Co Ltd | 成形加工用マグネシウム合金板およびその製造方法 |
JP2011025264A (ja) * | 2009-07-23 | 2011-02-10 | Mitsubishi Alum Co Ltd | マグネシウム板材のコイル圧延方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014180187A1 (zh) * | 2013-05-07 | 2014-11-13 | 宝山钢铁股份有限公司 | 一种低成本细晶弱织构镁合金薄板及其制造方法 |
US10000836B2 (en) | 2013-05-07 | 2018-06-19 | Baoshan Iron & Steel Co., Ltd. | Low-cost fine-grain weak-texture magnesium alloy sheet and method of manufacturing the same |
Also Published As
Publication number | Publication date |
---|---|
JP2012172254A (ja) | 2012-09-10 |
US20130337282A1 (en) | 2013-12-19 |
KR20140004711A (ko) | 2014-01-13 |
DE112012000994T5 (de) | 2014-01-16 |
KR101885397B1 (ko) | 2018-08-03 |
CN103370433A (zh) | 2013-10-23 |
JP5757104B2 (ja) | 2015-07-29 |
TW201247889A (en) | 2012-12-01 |
CN103370433B (zh) | 2016-08-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5757105B2 (ja) | マグネシウム合金材及びその製造方法 | |
JP5839056B2 (ja) | マグネシウム合金板材、及びマグネシウム合金板材の製造方法 | |
WO2014168147A1 (ja) | プレス成形用アルミニウム合金板、その製造方法およびそのプレス成形体 | |
JP5757104B2 (ja) | マグネシウム合金材及びその製造方法 | |
KR101463319B1 (ko) | 마그네슘 합금재 | |
JP5648885B2 (ja) | マグネシウム合金板、マグネシウム合金部材、及びマグネシウム合金板の製造方法 | |
WO2012066986A1 (ja) | マグネシウム合金板、及びその製造方法 | |
JP6176393B2 (ja) | 曲げ加工性と形状凍結性に優れた高強度アルミニウム合金板 | |
US20150152527A1 (en) | Magnesium alloy sheet and magnesium alloy structural member | |
KR20150125729A (ko) | 마그네슘 합금재 | |
WO2011129221A1 (ja) | 耐衝撃部材 | |
JP2015025168A (ja) | マグネシウム合金コイル材、及びマグネシウム合金コイル材の製造方法 | |
KR102252289B1 (ko) | 마그네슘 합금 판재 및 그 제조방법 | |
JPWO2018235591A1 (ja) | マグネシウム合金板 | |
JP2012140655A (ja) | マグネシウム合金板材 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12750144 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20137020341 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14001646 Country of ref document: US Ref document number: 112012000994 Country of ref document: DE Ref document number: 1120120009940 Country of ref document: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 12750144 Country of ref document: EP Kind code of ref document: A1 |