WO2008069049A1 - マグネシウム合金材およびその製造方法 - Google Patents
マグネシウム合金材およびその製造方法 Download PDFInfo
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- WO2008069049A1 WO2008069049A1 PCT/JP2007/072847 JP2007072847W WO2008069049A1 WO 2008069049 A1 WO2008069049 A1 WO 2008069049A1 JP 2007072847 W JP2007072847 W JP 2007072847W WO 2008069049 A1 WO2008069049 A1 WO 2008069049A1
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- magnesium alloy
- alloy material
- elongation
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- alloy
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Classifications
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- 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
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/06—Alloys based on magnesium with a rare earth metal as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
Definitions
- the present invention is excellent in mechanical properties (tensile strength, 0.2% strength and elongation), and in particular, has high tensile strength and 0.2% strength while maintaining high elongation.
- the present invention relates to a magnesium alloy material and a manufacturing method thereof.
- magnesium alloy materials have the lowest density, light weight, and high strength among the alloys in practical use. As a result, chassis of electrical products, automobile wheels, and underbody parts. ), And certain lay- ers (such as around-the-engine parts).
- Patent Document 1 Japanese Patent Laid-Open No. 06-041701
- Patent Document 2 JP 2002-256370 A
- Non-Patent Document 1 Noriaki Yamazaki and 3 others, “A New Mg-Zn-Gd Alloy Forming a Long-Period Laminate Structure by High-Temperature Heat Treatment”, Abstracts of the 108th Spring Meeting of the Japan Institute of Light Metals (2005) The Japan Institute of Light Metals, 2005, p. 43-44
- Non-Patent Document 2 Kim et al., “Development of high-strength Mg-Zn-Gd alloy using rapid solidification method”, Summary of the 109th Autumn Meeting of the Japan Institute of Light Metals (2005), Japan Institute of Light Metals, 2005 , p. 9-10
- Non-Patent Document 3 Kim et al., “Mechanical properties of Mg-Zn-Gd rapidly solidified ribbon-solidified moldings with long-period laminate structure”, Abstracts of the 110th Spring Meeting of the Japan Institute of Light Metals (2006), The Japan Institute of Light Metals, 2006, p. 355-356
- Non-Patent Document 4 Kim and 2 others, "Development of high-strength Mg-Zn-Gd alloy using rapid solidification method” , The Japan Institute of Metals Fall Meeting Summary, Japan Institute of Light Metals, 2005, p. 9-10 Invention Disclosure
- the above-described magnesium alloy material has a problem in that it has a special manufacturing method! /, And it has high mechanical properties, but requires special equipment and has low productivity. There is also a problem that the members that can be further applied are limited. For example, when applied to parts such as engine pistons, high elongation is required in addition to tensile strength and resistance. In addition, the conventional magnesium alloy material has a problem that the tensile strength and the 0.2% proof stress are insufficient when high elongation is realized.
- the present invention was devised in view of the above problems, and has excellent mechanical properties, in particular, while maintaining high elongation without using special manufacturing equipment and processes. It is an object of the present invention to provide a magnesium alloy material having a tensile strength and a 0.2% resistance and a method for producing the same.
- the present invention is configured as the following magnesium alloy material. That is, the magnesium alloy material according to the present invention contains Mg ⁇ : Gd as essential components in a range of ⁇ :;! ⁇ 5 mass%, Gd: 5 ⁇ ; 15 mass%, with the balance being Mg and inevitable impurities.
- -Zn-based alloy power which has a long-period laminated structure in the alloy structure of the Mg-Gd-Zn alloy, and Mg Gd and / or Mg Zn
- Gd is 4% or more.
- the tensile strength and 0.2% resistance of the magnesium alloy material can be improved by having a long-period laminated structure in the alloy structure of the Mg-Gd-Zn alloy. .
- Mg Gd and / or Mg Zn Gd in the alloy structure,
- the elongation of the alloy material can be improved.
- the magnesium alloy material includes the Mg Gd and / or Mg Z in the alloy structure.
- the area ratio of 33 n Gd is preferably 53% or less.
- the area ratio of Mg Gd and / or Mg Zn Gd is limited to a predetermined range.
- the elongation strength s of the magnesium alloy material becomes even more appropriate.
- the elongation (%) measured by a tensile test specified in JIS is (x) and 0.2% meta (MPa) is (y), (-15. 57x ) +467 ⁇ y ⁇ (-15. 57x) + 5
- the elongation and the 0.2% resistance to resistance have a predetermined relationship, so that it can be applied to automotive parts having severe mechanical properties such as engine pistons.
- a method for producing a magnesium alloy material according to the present invention comprises dissolving the Mg-Gd-Zn alloy.
- a melting and forging step of forging to obtain a forged material and a plastic working step for producing a processed material by subjecting the forged material to hot plastic processing at a predetermined processing speed.
- the forged material is subjected to hot plastic processing at a predetermined processing speed.
- the long-period laminated structure formed in the melting and forging process is locally broken (predetermined area ratio), and Mg Gd and / or Mg Zn Gd is precipitated in the broken intragranular portion.
- the magnesium alloy material according to the present invention has a long-period laminated structure in the alloy structure of the Mg-Zn-Gd-based alloy and has high elongation by including Mg Gd and / or Mg Zn Gd.
- Gd and / or Mg Zn Gd area ratio is within a specified range, so even higher elongation
- the magnesium alloy material according to the present invention can be applied to parts with severe mechanical properties such as automotive parts, particularly engine pistons. It becomes possible to apply to.
- the method for producing a magnesium alloy material according to the present invention includes a magnesium alloy material having improved mechanical properties by a general production facility or process by performing hot plastic working at a predetermined working speed. Can be produced efficiently.
- FIG. 1 is an optical micrograph showing the alloy structure of a magnesium alloy material (worked material) when the magnesium alloy material according to the present invention is produced at an extrusion rate of 2.5 mm / sec.
- FIG. 2 is an optical micrograph showing the alloy structure of a magnesium alloy material (worked material) when the magnesium alloy material according to the present invention is produced at an extrusion speed of 5. Omm / sec.
- FIG. 3 is an optical micrograph showing the alloy structure of a magnesium alloy material (worked material) when the magnesium alloy material according to the present invention is produced at an extrusion speed of 7.5 mm / Sec.
- FIG. 4 A graph showing the relationship between the elongation of magnesium alloy material (processed material) and 0.2% proof stress.
- FIG. 5 is a longitudinal sectional view showing an equivalent strain distribution of a magnesium alloy material (processed material) according to the present invention.
- FIG. 6 is an optical micrograph of a cross section orthogonal to the processing direction of the magnesium alloy material after extrusion (after tensile test).
- FIG. 7 is an optical micrograph of the photograph of FIG. 6 when image processing was performed in black on a region where Mg Gd and / or Mg Zn Gd was deposited.
- FIG. 8 An optical micrograph of the image of FIG. 7 when image processing for binarization into black and white was performed.
- Figures 1 to 3 are optical micrographs showing the alloy structure of the magnesium alloy material (processed material) when the extrusion speed is changed.
- Figure 1 shows the extrusion speed of 2.5 mm / sec
- Figure 2 shows the extrusion process.
- Speed 5 Omm / sec
- Fig. 3 shows the extrusion speed 7.5 mm / sec.
- Fig. 4 is a graph showing the relationship between the elongation of the magnesium alloy material and the 0.2% proof stress.
- Fig. 5 is a longitudinal sectional view showing the equivalent strain distribution of the magnesium alloy material (processed material).
- Figures 6-8 show Mg Gd
- FIG. 3 shows the method for calculating the area ratio of Mg Zn Gd.
- Fig. 8 is an optical micrograph of the image processed to binarize black and white.
- the magnesium alloy material according to the present invention is a component used in a high temperature atmosphere, for example, a component for an automobile, in particular, a piston, a valve, a lifter (l3 ⁇ 4er), a tappet, a sprocket for an internal combustion engine. ) Etc.
- the shape of the magnesium alloy material is, for example, a plate shape or a rod shape, and is appropriately selected depending on the shape of the parts used.
- Magnesium alloy material contains Mg: Gm-Gn-Zn as an essential component, containing Zn:;! ⁇ 5 mass%, Gd: 5 ⁇ ; 15 mass%, with the balance being Mg and inevitable impurities It is made of an alloy. Each component is described in detail below.
- the Mg-Gd-Zn alloy contains Zn as an essential component in the range of 1 to 5 mass%. If Zn is less than 1% by mass, it is impossible to obtain Mg Gd.
- the tensile strength and 0.2% resistance (strength) of the aluminum alloy material cannot be obtained. Moreover, even if Zn exceeds 5% by mass, not only will the tensile strength and 0.2% proof stress increase according to the increase in the amount added, but also Mg Gd, Mg Zn Gd, etc. precipitated at the grain boundaries. Increases and elongation decreases.
- Mg-Gd-Zn alloys contain Gd as an essential component in the range of 5 to 15% by mass. If Zn is less than 1% by mass, it is impossible to obtain Mg Gd.
- Zr which contributes to miniaturization, in the range of 0.2 to 1.0 mass%. If Zr is less than 0.2% by mass, the effect of miniaturization will decrease, and if it exceeds 1.0% by mass, an increase in tensile strength and 0.2% yield strength will be obtained in accordance with the effect of miniaturization. Peg.
- Mg—Gd—Zn alloy may contain other components in the range of inevitable impurities in addition to the components described above.
- Fe, Ni, Cu, Si or the like may be contained in an amount of 0.2% by mass or less.
- the magnesium alloy material has a long-period laminated structure (LPSO) in the alloy structure of Mg-Gd-Zn alloy, and Mg Gd and / or Mg Zn.
- LPSO long-period laminated structure
- a long period stacking ordered structure is a precipitate that precipitates in the grains and in grain boundaries of the magnesium alloy material in the melting and forging process.
- LPSO long period stacking ordered structure
- a high-concentration long-period laminate structure is present in the form of a lamella at the grain boundary, and the tensile strength and 0.2% yield strength of the magnesium alloy material are improved by the precipitation of this long-period laminate structure.
- the long-period laminate structure is locally broken due to processing heat generation, and Mg Gd and / or Mg Zn
- the long-period stacked structure is, for example, a plurality of ordered lattices arranged again, and a plurality of ordered lattices arranged again through an out-of-phase shift, which is several times to 10 times the original lattice.
- a structure in which a unit structure is created and its period is long.
- the long-period laminated structure appears in a slight temperature range between the regular phase and the irregular phase, and the reflection of the regular phase is split in the electron diffraction diagram, resulting in a period of several to ten times. Diffraction spots appear at the corresponding positions.
- Mg alloys are difficult to plastically process because there are few slip systems.
- Mg alloy has the characteristic of being easily twinned.
- the Mg—Gd—Zn alloy of the present invention has a long-period laminated structure on the crystal plane, and cannot be twinned. Therefore, when extrusion is applied, local plastic flow occurs in the alloy because of the small slip system. This Due to the local plastic flow, heat generation due to processing increases, and dynamic recrystallization occurs due to this heat generation. As a result of this dynamic recrystallization, as shown in FIGS. 1 to 3, the long-period laminate structure is locally broken, and Mg Gd and / or Mg Zn Gd is deposited in the broken intragranular portion.
- Mg Gd and Mg Zn Gd have a very fine size of 100 400 nm
- Mg Gd and / or Mg Zn Gd has an area ratio of 53% or less of the entire alloy structure
- Power S is preferable, and 453% is more preferable. If the area ratio exceeds 53%, the decrease in tensile strength and 0.2% proof stress is large. It becomes difficult to obtain the strength required for automotive parts. On the other hand, if it is less than 4%, the required elongation for automotive parts will not be obtained.
- the area ratio is controlled by the processing speed in the plastic working process when manufacturing the magnesium alloy material, and the area ratio increases as the processing speed increases (see Figs. 1 to 3).
- the magnesium alloy material according to the present invention has an elongation (%) measured by a tensile test specified in JIS as (X), and a 0.2% resistance (MPa) to ( It is more preferable that (-15. 57x) + 467 ⁇ y ⁇ (-15. 57x) + 555, force, x ⁇ 20 when y).
- examples of the present invention are data of the results of tests conducted in the manner described in the following examples. A portion of this data is shown in Table 1 in the examples below. “Existing material” is an extruded material of ordinary Mg alloy (AZ31).
- the magnesium alloy material according to the present invention is applied to automotive parts having severe mechanical property conditions such as engine pistons. Easy to do.
- the relationship between the elongation and the 0.2% proof stress is based on the area ratio of Mg Gd and / or Mg Zn Gd (analysis) in consideration of the component composition of the magnesium alloy.
- the method for producing a magnesium alloy material includes a melting and forging step and a plastic working step. Hereinafter, each step will be described.
- a forged material is obtained by melting and forging a Mg-Gd-Zn-based alloy containing Zn in a range of 1 to 5 mass%, Gd in a range of 5 to 15 mass%, and the balance being Mg and inevitable impurities. Then, by melting and forging, it is precipitated in a long-period laminated structural force S lamellar shape within the grains and at the grain boundaries of the magnesium alloy material. Further, a long-period stacked structure having a high concentration is precipitated at the grain boundary. The precipitation of this long-period laminate structure improves the tensile strength and 0.2% proof stress of the magnesium alloy material.
- melting is preferably flux scouring.
- the obtained forged material may be subjected to a homogenization heat treatment! /.
- a homogenization heat treatment By homogenization heat treatment, the above-mentioned lamellar structure (high-concentration long-period laminated structure) that has precipitated at the grain boundaries of the forged structure disappears, and the tensile strength and elongation of the magnesium alloy material become higher.
- the temperature of the homogenization heat treatment is preferably 480 ° C or more and the holding time of 1 hour or more.
- the temperature of the homogenization heat treatment is less than 480 ° C or the holding time is less than 1 hour, the solid solution of the lamellar structure becomes difficult to proceed, and the lamellar structure tends to remain at the grain boundaries of the fabricated structure. Therefore, it becomes difficult to improve the mechanical properties of the magnesium alloy material.
- the forging material manufactured in the above process or the forging material subjected to the homogenization heat treatment is subjected to hot plastic processing at a predetermined processing speed.
- the hot plastic working is preferably extrusion and / or forged Karoe.
- Precipitation amount of Gd that is, the area of Mg Gd and / or Mg Zn Gd in the alloy structure
- the processing speed of the hot plastic processing is preferably 2.7 to 21 mm / sec in the extrusion process, and the area ratio is small below 2.7 mm / Sec , and the predetermined elongation required for the automotive part is small. It becomes difficult to obtain. If it exceeds 21 mm / sec, the area ratio increases and an increase in elongation is observed, but the tensile strength and 0.2% proof stress decrease, making it difficult to obtain the strength required for automotive parts.
- the reason for setting the numerical range in which 2.7 to 21 mm / Sec is preferable in the forging process is the same as that in the extrusion process.
- the workpiece 10 produced by hot plastic working is at least partially a portion 10A having an equivalent strain of 1.5 or more. It is preferable to have If the equivalent strain is less than 1 ⁇ 5, the mechanical properties of the magnesium alloy material will vary greatly. When using processed materials for automobile parts, etc., the parts that require high mechanical properties should be composed of parts 10A with a considerable strain of 1.5 or more. Therefore, it is preferable to perform hot plastic working so that the equivalent strain of 1.5 or more is obtained in all parts of the workpiece 10 so that the portions 10B and 10C having the equivalent strain of less than 1.5 are not formed.
- the processed material 10 is a free-forged cylindrical forged material
- FIG. 5 shows the distribution of the equivalent strain in a longitudinal sectional view when the processed material 10 is viewed in plan.
- Equivalent strain is equivalent strain corresponding to the yield stress of Von Mieses and is calculated by the following equation (1).
- the equivalent strain is represented by ( ⁇ )
- the true strain in the length direction is represented by (8)
- the true strain in the width direction is represented by ( ⁇ )
- the true strain in the thickness direction is represented by ( ⁇ ).
- the upper limit of the equivalent strain is not particularly limited, but if the equivalent strain to be applied is too high, the tensile strength, 0.2% resistance, and elongation of the magnesium alloy material will decrease. Preferably less than 3. 1.5 to 2.0 is more preferable.
- the processing temperature at the time of hot plastic working can be appropriately selected within the range of 300 to 500 ° C according to the processing rate of the forged material. preferable.
- T (° C) is a forging end temperature
- E (%) is a processing rate
- the processing end temperature and the processing rate in the forging process become appropriate, and cracking occurs during forging calorie. It does not occur. In other words, if the forging end temperature (T) does not reach the temperature calculated by adding 210 to the double processing rate (E), forging cracks are likely to occur, which is inappropriate. In addition, if the forging end temperature (T) is too high, fine subgrains generated by plastic working grow by dynamic recrystallization (dynamic treatment process), and the mechanical properties of the magnesium alloy material are increased. Properties tend to deteriorate. Therefore, it is preferable that the upper limit value of the forging end temperature (T) is a temperature calculated by adding 310 to the double processing rate (E).
- the magnesium alloy material manufacturing method according to the present invention is maintained at 200 to 300 ° C for 10 hours or more for dimensional stabilization of the magnesium alloy material (worked material) after performing the plastic working process.
- a stabilization treatment process may be added.
- the magnesium alloy material according to the present invention can be easily applied to products used under the influence of heat, such as pistons, valves, lifters, tappets and sprockets for internal combustion engines. Convenient.
- each material was weighed so as to have an alloy composition of Mg-Gd (12.9 mass%) _21 (2.7 mass%) _ 2 0.6 mass%), charged into a melting furnace, Dissolution was performed by (flux refining). Subsequently, the heated and melted material was forged into a mold (outer diameter ⁇ 150 mm) to produce an ingot. The forged material was subjected to a homogenized heat treatment at 510 ° C for 4 hours, and machined to obtain a forged material for extrusion. Next, the forged material was charged into an extruder, the magnesium alloy material (Examples 1 to 6, outer diameter ⁇ 6 mm) was manufactured by changing the extrusion speed and performing extrusion. The extrusion temperature was constant at 375 ° C and an extrusion ratio of 9.
- Example 1 1 50 2. 5 1.5 1.5 395 337 9.6
- Example 2 1 50 2. 5 1.5 396 340 9.5
- Example 3 1 50 5 1 9. 1 366 288 1 3.3
- Example 4 1 50 5 1 9. 1 367 290 1 3. 6
- Example 5 1 50 7. 5 353 265 1 4.
- Example 6 1 50 7. 5 352 264 1 4. 6
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US12/517,134 US20100061882A1 (en) | 2006-11-30 | 2007-11-27 | Magnesium alloy material and method for manufacturing the same |
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JP2006325056A JP5175470B2 (ja) | 2006-11-30 | 2006-11-30 | マグネシウム合金材およびその製造方法 |
JP2006-325056 | 2006-11-30 |
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WO2008069049A1 true WO2008069049A1 (ja) | 2008-06-12 |
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PCT/JP2007/072847 WO2008069049A1 (ja) | 2006-11-30 | 2007-11-27 | マグネシウム合金材およびその製造方法 |
Country Status (4)
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US (1) | US20100061882A1 (ja) |
JP (1) | JP5175470B2 (ja) |
CN (1) | CN101622366A (ja) |
WO (1) | WO2008069049A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2009044829A1 (ja) * | 2007-10-02 | 2009-04-09 | National Institute For Materials Science | マグネシウム合金 |
CN109930045A (zh) * | 2019-03-29 | 2019-06-25 | 南京航空航天大学 | 适于重力铸造的高强韧耐热Mg-Gd合金及其制备方法 |
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JP2008280565A (ja) * | 2007-05-09 | 2008-11-20 | Ihi Corp | マグネシウム合金およびその製造方法 |
CN101787481B (zh) * | 2010-03-22 | 2011-07-27 | 北京工业大学 | 含Mg-Zn-Gd基准晶中间合金及其制备方法 |
KR101828629B1 (ko) * | 2010-05-24 | 2018-02-12 | 코몬웰스 싸이언티픽 엔드 인더스트리얼 리서치 오가니제이션 | 단련 응용을 위한 마그네슘계 합금 |
JP5658609B2 (ja) | 2011-04-19 | 2015-01-28 | 株式会社神戸製鋼所 | マグネシウム合金材およびエンジン部品 |
CN103184380B (zh) * | 2013-03-29 | 2016-05-04 | 江苏康欣医疗设备有限公司 | 生物可降解Mg-Gd-Zn-Sr-Zr系镁合金及其制备方法 |
CN103184379B (zh) * | 2013-03-29 | 2015-10-07 | 江苏康欣医疗设备有限公司 | 生物可降解Mg-Gd-Zn-Ag-Zr系镁合金及其制备方法 |
US20150140352A1 (en) * | 2013-11-18 | 2015-05-21 | Biotronik Ag | Semifinished product and high-strength degradable implant formed therefrom |
CN104372225B (zh) * | 2014-11-20 | 2017-02-22 | 上海交通大学 | 具有LPSO结构的铸态Mg‑Gd‑Zn(‑Zr)合金的制备方法 |
CN105112828B (zh) * | 2015-09-24 | 2017-03-22 | 济南大学 | 一种铸造Mg‑Zn‑Y镁合金长周期结构相的调控方法 |
CN113528915B (zh) * | 2021-07-09 | 2022-02-11 | 青岛理工大学 | 一种抗冲击的高强耐热镁稀土合金材料 |
CN113943881B (zh) * | 2021-08-31 | 2023-02-28 | 上海航天精密机械研究所 | 一种耐高温高强度阻尼镁合金材料及其制备方法 |
CN113862539B (zh) * | 2021-10-08 | 2023-02-03 | 长沙理工大学 | 一种降低含LPSO相Mg-Gd-Zn镁合金变形激活能的熔铸工艺 |
CN114107849A (zh) * | 2021-11-29 | 2022-03-01 | 哈尔滨工业大学 | 一种高强韧Mg-Gd-Y-Zn-Zr变形镁合金的制备方法 |
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JP3308377B2 (ja) * | 1994-03-09 | 2002-07-29 | 大同特殊鋼株式会社 | 歯面強度の優れた歯車およびその製造方法 |
JP3893889B2 (ja) * | 2001-03-21 | 2007-03-14 | 大同特殊鋼株式会社 | 破断による分離が容易な熱間鍛造用非調質鋼 |
EP1273769A3 (en) * | 2001-07-03 | 2003-10-15 | Nissan Motor Co., Ltd. | Cam lobe piece of built-up type camshaft |
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EP1450056B1 (en) * | 2003-02-19 | 2017-06-07 | Nissan Motor Co., Ltd. | High-strength connecting rod and method of producing same |
US20070125464A1 (en) * | 2003-11-26 | 2007-06-07 | Yoshihito Kawamura | High strength and high toughness magnesium alloy and method of producing the same |
JP4500916B2 (ja) * | 2004-09-28 | 2010-07-14 | 国立大学法人 熊本大学 | マグネシウム合金及びその製造方法 |
JP4139841B2 (ja) * | 2004-09-30 | 2008-08-27 | 能人 河村 | 鋳造物及びマグネシウム合金の製造方法 |
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2006
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2007
- 2007-11-27 US US12/517,134 patent/US20100061882A1/en not_active Abandoned
- 2007-11-27 WO PCT/JP2007/072847 patent/WO2008069049A1/ja active Application Filing
- 2007-11-27 CN CN200780043977A patent/CN101622366A/zh active Pending
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2009044829A1 (ja) * | 2007-10-02 | 2009-04-09 | National Institute For Materials Science | マグネシウム合金 |
JP5424204B2 (ja) * | 2007-10-02 | 2014-02-26 | 独立行政法人物質・材料研究機構 | マグネシウム合金 |
CN109930045A (zh) * | 2019-03-29 | 2019-06-25 | 南京航空航天大学 | 适于重力铸造的高强韧耐热Mg-Gd合金及其制备方法 |
CN109930045B (zh) * | 2019-03-29 | 2021-07-09 | 南京航空航天大学 | 适于重力铸造的高强韧耐热Mg-Gd合金及其制备方法 |
Also Published As
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CN101622366A (zh) | 2010-01-06 |
US20100061882A1 (en) | 2010-03-11 |
JP5175470B2 (ja) | 2013-04-03 |
JP2008138249A (ja) | 2008-06-19 |
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