JP5252363B2 - Magnesium alloy press-molded body and method for producing the same - Google Patents

Description

  The present invention relates to a magnesium alloy press-formed body and a method for producing the same, and more specifically, by using a magnesium alloy sheet material to which an appropriate amount of Ce, La, and Y is added and selecting an appropriate heat treatment condition, TECHNICAL FIELD The present invention relates to a magnesium alloy press-molded body manufacturing method and a magnesium alloy press-molded body capable of producing a magnesium alloy press-molded body having complex molding at around room temperature by press molding at a temperature of 160 ° C. or lower. Is. The present invention provides a magnesium alloy member and casing that can be used in a wide range of fields such as space, aeronautical materials, electronic equipment materials, and automobile members.

Magnesium has the lowest density (= 1.7 g / cm ³ ) among practical structural metal materials, has easy recyclability unique to metal materials, and has abundant resources. It is attracting attention as. Currently, many magnesium products in Japan are manufactured by casting methods such as die casting and thixocasting. The fact that thin-wall molding is possible by these methods is the biggest factor that promoted the industrialization of magnesium alloys. In particular, in household electrical appliances, a magnesium alloy casting material is used for household electrical appliance casings such as personal computers, mobile phones, and digital cameras. However, the current production methods using casting methods have problems such as the need for post-processing to compensate for casting defects, low yields, and problems with the strength and rigidity of members.

  Press molding is generally an effective means of increasing demand because it has a high yield and can achieve high strength and toughness simultaneously with molding. In particular, when a compact can be produced from a magnesium alloy sheet by press forming such as deep drawing, stretch forming, blow molding, etc., a thin and high-strength compact can be produced by an inexpensive process. Many demands such as body can be predicted. For this reason, magnesium alloy members produced by press molding have begun to be gradually distributed.

  It is known that dislocation motility, which is the basis of plastic deformation of metals, is affected by the ratio of slip plane spacing / interatomic distance. Therefore, in the case of a close-packed hexagonal magnesium alloy, the ratio of the a-axis length to the c-axis length (c / a ratio) is large (c / a = 1.6236). There is a big difference in mobility. Therefore, the critical decomposition shear stress of the non-bottom slip of the magnesium alloy is very large at room temperature as compared with other slip systems, and the room temperature formability is inevitably low. Furthermore, since a texture in which the (0002) plane is oriented parallel to the plate surface is formed in the magnesium alloy rolled material, distortion in the plate thickness direction during plastic deformation cannot be expected, and room temperature formability is hindered. It is a factor. These problems are a great hindrance for putting the magnesium alloy press-molded body into practical use.

  As a technique for press-molding a magnesium alloy having poor room temperature formability, warm press-molding can be mentioned. In the above method, a magnesium alloy sheet is formed by controlling processing parameters such as processing temperature, processing speed, mold shape, lubricant, etc., and the magnesium alloy sliding system increases at a high temperature (250 ° or more), This invention pays attention to the increase in ductility. Specifically, for example, a deep drawing method of a magnesium thin plate (Patent Document 1), a manufacturing method of a magnesium alloy thin plate excellent in press formability (Patent Document 2), and a manufacturing method of a magnesium alloy thin molded body Method and thin-walled molded body (Patent Document 3), magnesium alloy thin-walled molded body manufacturing method and thin-walled molded body (Patent Document 4), magnesium alloy thin-walled molded body manufacturing method and thin-walled molded body (Patent Document 5), etc. The invention is mentioned.

  One of other methods for press-forming a magnesium alloy is superplastic forming. A metal material exhibits a superplastic phenomenon when crystal grains are refined. Superplastic deformation refers to “a phenomenon in which deformation stress shows a high strain rate dependency in tensile deformation of a polycrystalline material and exhibits a huge elongation of several hundred% or more without causing local contraction”. Examples of the invention relating to a method for forming a magnesium alloy sheet using superplastic forming include, for example, a magnesium alloy part and its manufacturing method (Patent Document 6), a magnesium part and its manufacturing method (Patent Document 7), and a magnesium material spindle processing method. And the apparatus (patent document 8), the deep drawing method of a magnesium alloy board | plate material, and its molded object (patent document 9) are mentioned.

  In the magnesium alloy warm forming method and superplastic forming method, it is necessary to perform forming at a forming temperature (about 250 ° C. or higher) at which the critical decomposition shear stress of the bottom surface slip and the non-bottom slip can be compared. On the other hand, the flash point of a general oil-based lubricant is about 250 ° C., and it is necessary to use a special lubricant. When using solid lubricants such as graphite grease and molybdenum disulfide that can be used at 250 ° C or higher, and pre-coat type lubricants, it is necessary to add work such as mechanical barrel polishing to remove the lubricant. This is one of the causes of high costs.

  As a method for producing a magnesium alloy press-molded body at a sample temperature of 250 ° C. or lower, use of a magnesium alloy rolled material having a controlled texture can be mentioned. Specifically, a magnesium alloy produced using a different peripheral speed rolling method (Non-Patent Document 1) and a cross rolling method (Patent Document 10) is press-molded under specific molding conditions (Patent Document 11). . This method is characterized by using a rolled material that weakens the texture formation of the (0002) plane by a rolling method that involves shear deformation. By pressing the rolled material under specific conditions, oil lubrication Even at 150 ° C. or higher and 230 ° C. or lower where the agent can be used sufficiently, it is possible to ensure high moldability.

  The invention relating to a conventional press-formed body of a magnesium alloy rolled material and a method for producing the same focuses on a method for heating a plate material, a method for lubricating the plate material, a crystal form of the rolled material, and a texture. Most inventions related to press molding in the warm region (about 150 ° C. to 300 ° C.). In the future, demand for magnesium alloy press-molded bodies is expected to increase further, centering on home appliance housings and automotive structural members. To build a production system that can meet market demand, it is closer to room temperature. Techniques are needed to press form the rolled material at temperature.

JP-A-6-55230 JP-A-6-293944 JP 2000-246386 A JP 2001-162346 A JP 2001-170735 A JP 2004-149841 A JP 2003-31360 A JP 2000-1226827 A JP 2004-58111 A JP 2004-10959 A Japanese Patent Application No. 2005-272589 Y. Chino et al. , Mater. Trans. , Vol. 43 (2002), pp. 2555-2560

  In such a situation, the present inventor, in view of the prior art, as a result of intensive research with the goal of developing a new technology for press-molding a rolled material at a temperature closer to room temperature, When a small amount of Ce, La, Y is added to magnesium, the c / a ratio (1.6238) of magnesium atoms decreases, and a magnesium alloy containing a small amount of Ce, La, Y has a random texture Paying attention, we found that press formability is ensured at a sample temperature of 160 ° C. or lower by using a magnesium alloy sheet material to which an appropriate amount of Ce, La, and Y is added and selecting an appropriate heat treatment condition. The inventors have obtained basic knowledge for producing a magnesium alloy press-molded body having complex forming at around room temperature, and have further researched to complete the present invention. The object of the present invention is to provide a magnesium alloy press-molded body produced by the above-described method and a method for producing the same.

The present invention for solving the above-described problems comprises the following technical means.
(1) The total amount of Ce + La + Y is 0.01 atomic% to 0. A press-molded body made of a magnesium alloy that is made of a magnesium alloy rolled material that is 06 atomic%, has impurities that are inevitably mixed in, and the remainder is made of magnesium,
A magnesium alloy press-molded product, wherein an average Rankford value of a rolled magnesium alloy material is 1.25 or less at room temperature.
(2) The total amount of Ce is 0.01 atomic% to 0. 0. A press-molded body made of a magnesium alloy that is made of a magnesium alloy rolled material that is 06 atomic%, has impurities that are inevitably mixed in, and the remainder is made of magnesium,
A magnesium alloy press-molded product, wherein an average Rankford value of a rolled magnesium alloy material is 1.25 or less at room temperature.
(3) The total amount of La is 0.01 atomic% to 0. 0. A press-molded body made of a magnesium alloy that is made of a magnesium alloy rolled material that is 06 atomic%, has impurities that are inevitably mixed in, and the remainder is made of magnesium,
A magnesium alloy press-molded product, wherein an average Rankford value of a rolled magnesium alloy material is 1.25 or less at room temperature.
(4) The total amount of misch metal in which the total amount of Ce + La is 70% by mass or more is 0.01 atomic% to 0.00%. A press-molded body made of a magnesium alloy that is made of a magnesium alloy rolled material that is 06 atomic%, has impurities that are inevitably mixed in, and the remainder is made of magnesium,
A magnesium alloy press-molded product, wherein an average Rankford value of a rolled magnesium alloy material is 1.25 or less at room temperature.
(5) The total amount of Y is 0.01 atomic% to 0. 0. A press-molded body made of a magnesium alloy that is made of a magnesium alloy rolled material that is 06 atomic%, has impurities that are inevitably mixed in, and the remainder is made of magnesium,
A magnesium alloy press-molded product, wherein an average Rankford value of a rolled magnesium alloy material is 1.25 or less at room temperature.
(6) A magnesium alloy member comprising the magnesium alloy press-molded body according to any one of (1) to (5).
(7) The total amount of Ce + La + Y is 0.01 atomic% to 0. After forming a magnesium alloy rolled material having a content of 06 atomic% and other impurities inevitably mixed and the balance being magnesium, annealing at 300 to 450 ° C. for 10 minutes or more, and then forming at a sample temperature of 160 ° C. or less A method for producing a magnesium alloy press-molded body.
(8) The total amount of Ce is 0.01 atomic% to 0. 0. After forming a magnesium alloy rolled material having a content of 06 atomic% and other impurities inevitably mixed and the balance being magnesium, annealing at 300 to 450 ° C. for 10 minutes or more, and then forming at a sample temperature of 160 ° C. or less A method for producing a magnesium alloy press-molded body.
(9) The total amount of La is 0.01 atomic% to 0. 0. After forming a magnesium alloy rolled material having a content of 06 atomic% and other impurities inevitably mixed and the balance being magnesium, annealing at 300 to 450 ° C. for 10 minutes or more, and then forming at a sample temperature of 160 ° C. or less A method for producing a magnesium alloy press-molded body.
(10) The total amount of misch metal in which the total amount of Ce + La is 70% by mass or more is 0.01 atomic% to 0.00%. After forming a magnesium alloy rolled material having a content of 06 atomic% and other impurities inevitably mixed, and the balance being magnesium, annealing at 300 to 450 ° C. for 10 minutes or more, and then forming at a sample temperature of 160 ° C. or less. A method for producing a magnesium alloy press-molded body.
(11) The total amount of Y is 0.01 atomic% to 0.00. After forming a magnesium alloy rolled material having a content of 06 atomic% and other impurities inevitably mixed and the balance being magnesium, annealing at 300 to 450 ° C. for 10 minutes or more, and then forming at a sample temperature of 160 ° C. or less A method for producing a magnesium alloy press-molded body.
(12) The manufacturing method of the magnesium alloy press-molded body according to any one of (7) to (11), wherein annealing is performed at 300 to 450 ° C. for 10 minutes or more and a holding time.

Next, the present invention will be described in more detail.
The present invention is a magnesium alloy press-molded body, wherein the total amount of Ce, La and / or Y is 0.01 atomic% to 0.00. It is made of a magnesium alloy rolled material having a content of 06 atomic% and other impurities inevitably mixed therein. Moreover, this invention is a method of manufacturing the said magnesium alloy press molding, Comprising: The total amount of Ce, La, and / or Y is 0.01 atomic%-0.00. A magnesium alloy rolled material having an impurity content of 06 atomic% and other impurities inevitably mixed is formed at a sample temperature of 433 K or less (160 ° C.) after annealing at 300 to 450 ° C. for 10 minutes or more. It is what.

  The inventor has paid attention to the use of an alloy obtained by adding a small amount of Ce, La, and Y to magnesium as a means for producing a magnesium alloy press-formed body at a lower temperature than the conventional press-forming method. It is known that the c / a ratio generally increases when Al, Zn, or the like, which is a typical additive element to magnesium, is added. On the other hand, when Ce, La, and Y are added to magnesium, the c / a ratio has been reported to decrease [Literature: R.C. S. Busk, Transactions AIME, vol. 188 (1950) 1460-1464; R. Agnew, M.M. H. Yoo, C.I. N. Tome, Acta Materialia, vol. 49 (2001) 4277-4289]

  The inventor of the present invention paid attention to the positive use of the reduction in the c / a ratio, which is manifested by the addition of Ce, La, and Y, for press forming of a magnesium alloy. The decrease in the c / a ratio is considered to affect the difference in dislocation mobility between bottom and non-bottom slips, and reduce the difference in critical shear stress between bottom and non-bottom slips even at room temperature. As a result of research, reducing the difference in critical shear stress between bottom slip and non-bottom slip leads to a reduction in the plastic anisotropy of the rolled material, and is considered as one of the factors for improving the formability of the rolled material. It turns out that you can.

  Moreover, randomization of texture formation is mentioned as another effect which expresses by adding trace amount of Ce, La, and Y into magnesium. FIG. 1 is a (0002) plane texture of pure magnesium and Mg-0.04 atomic% Ce rolled material used in examples described later. The (0002) plane texture of the magnesium alloy rolled material to which a small amount of the element is added shows a weaker strength than that of pure Mg. That is, it has been found that the addition of the element into magnesium can suppress the accumulation of (0002) planes oriented parallel to the rolling direction and improve the formability of the magnesium alloy sheet.

For the above two reasons, the magnesium alloy sheet material to which a small amount of Ce, La, and Y is added can be isotropically plastically deformed as compared with a conventional commercial magnesium alloy. As a scale for judging whether or not the magnesium alloy sheet material is isotropically deformed, a sheet width direction strain (ε _w ) and a sheet thickness direction strain (ε _t ) when a test piece made from the rolled material is subjected to a tensile test. The Rankford value (r value) defined by the ratio can be used.

  The number associated with the Rankford value indicates the angle (°) between the rolling direction and the tensile test direction. Further, an average rankford value (average r value) that is an average of the expressions (1) to (3) can also be used as an index of formability.

A rolled material having a Rankford value close to 1 can be said to be a rolled material having a sufficient sheet thickness direction strain (ε _t ) and a small plastic anisotropy.

  As described above, in the rolled magnesium alloy material, a texture in which the (0002) plane is oriented parallel to the plate surface is formed. Therefore, distortion in the plate thickness direction during plastic deformation cannot be expected. The Rankford value is high and generally shows a value of 2 to 3 [reference: S.H. R. Agnew, J .; A. Horton, T .; M.M. Lillo, D.C. W. Brown, Scripter Mater. 50 (2004) 377-381]. Since a magnesium alloy to which a small amount of Ce, La, and Y is added has a low c / a ratio and a random texture, it is expected to have a Rankford value or an average Rankford value close to 1.

As a result of diligent research / development, the present inventor has created a magnesium alloy rolled material having a property of which the Rankford value is close to 1 by adopting an appropriate trace amount of Ce, La, and Y and an appropriate heat treatment condition. Clarified that it is possible. Specifically, the addition amount of Ce, La, and Y is 0.01 atomic% to 0.00. When the magnesium alloy rolled material produced by hot rolling is subjected to annealing at 300 to 450 ° C. for 10 minutes or more, the average Rankford value at room temperature is 1.25 or less (over 1). It was clarified that a rolled magnesium alloy material can be created.

As described above, the c / a ratio is decreased by adding Ce, La, and Y. However, when a large amount of rare earth element is added, the effect of solid solution hardening becomes strong, dislocation movement is inhibited, and ductility often decreases conversely. As a result of diligent research and development, the inventors of the present invention have set the average amount of Ce, La, and Y to 0.04 atomic% to 0.06 atomic% without inhibiting ductility, and average rankford of 1.25 or less. We have succeeded in finding that a rolled magnesium alloy material can be created.

  When producing a rolled material from a magnesium alloy to which Ce, La, and Y are added, heat treatment (complete annealing) of the rolled material may be performed before press forming in order to exclude high density dislocations accumulated inside the material. desirable. Specifically, it is desirable to use for press molding after being subjected to heat treatment at 300 to 450 ° C. for 10 minutes or more. It should be noted that if the heat treatment temperature is set to 450 ° C. or higher, abnormal grain growth may occur due to static recrystallization.

  Another factor for press-forming the magnesium alloy rolled material is the crystal grain size of the material. In the conventional warm press molding in which the sample needs to be heated to 150 ° C. or more, the contribution of grain boundary sliding to the deformation mechanism of the material cannot be ignored, so magnesium having as fine crystal grains as possible (5 to 10 μm or less) It is necessary to use a rolled alloy material (Patent Document 9).

  On the other hand, in press forming at room temperature, it has recently been reported that the strength of (0001) plane orientation is a dominant factor in press forming rather than the size of the crystal grain size [Reference: “Temperature of AZ31 Rolled Material]. Effect of Histological Factors on Stretch Formability ”, Yuji Sakabe, Gen Iwasaki, Masamasa Chino, Proceedings of the 57th Japan Plastic Working Society Lecture Meeting (October 2006)]. The present invention is characterized in that the press molding temperature is set to 160 ° C. or lower, whereby press molding can be performed regardless of the crystal grain size.

  Misch metal, which is easier to obtain than Ce and La, generally contains 70 mass% or more of the total amount of Ce + La. Therefore, addition of a small amount of misch metal can also bring about the same effect as described above, and in the present invention, it is possible to use misch metal.

In the magnesium alloy press-molded body of the present invention, the total amount of Ce + La + Y is 0.01 atomic% to 0.00. 06 atomic percent, the other that has been fabricated from a magnesium alloy rolled material having inevitably impurities mixed, the total amount of Ce is 0.01 atomic% to 0. 06 atomic percent, the other that has been fabricated from a magnesium alloy rolled material having inevitably impurities mixed, the total amount of La is 0.01 atomic% to 0. 06 atomic percent, the other that has been fabricated from a magnesium alloy rolled material having inevitably impurities mixed, Ce + La of the total amount is 70 mass% or more in a total amount of misch metal is 0.01 atomic% to 0. 06 atomic percent, the other that has been fabricated from a magnesium alloy rolled material having inevitably impurities mixed, or the total amount of Y is 0.01 atomic% to 0. It was made of a magnesium alloy rolled material having an impurity of 06 atomic% and other impurities inevitably mixed, and the average rankford value of the magnesium alloy rolled material used was 1.25 or less at room temperature. Characterized. The present invention provides a magnesium alloy member such as a casing made of the magnesium alloy press-molded body.

  The conventional press-formed body of a magnesium alloy rolled material and a method for producing the same focus on the method of heating the plate material, the method of lubricating the plate material, the crystal form of the rolled material, and the texture. Most were related to press molding in the intermediate range (about 150 ° C. to 300 ° C.). On the other hand, the present invention makes it possible to provide a magnesium alloy press-molded body capable of achieving press molding at a temperature closer to room temperature (160 ° C. or less) and a method for producing the same. .

The present invention has the following effects.
(1) A magnesium alloy press-molded body capable of press-molding a rolled material at around room temperature and a method for producing the same can be provided.
(2) The magnesium alloy press-molded body can be produced by subjecting a rolled magnesium alloy material obtained by adding trace amounts of Ce, La, and Y to magnesium in an appropriate composition and heat treatment conditions.
(3) It is possible to provide a new method for producing a magnesium alloy press-molded body that enables a rolled magnesium alloy material to be subjected to press molding in a low temperature range of a sample temperature of 160 ° C. or lower.

  EXAMPLES Next, although this invention is demonstrated concretely based on an Example, this invention is not limited at all by these Examples.

  Mg-0.04 atomic% Ce alloy casting material, Mg-0.04 atomic% La alloy casting material, Mg-0.06 atomic% Y alloy casting material, Mg-0.04 atomic% Mm ( A sample subjected to hot extrusion (extrusion temperature 573 K, extrusion speed 5 m / min, extrusion ratio 6) and heat treatment (703 K, 20 h) was used as a test material. The composition of the misch metal is as shown in Table 1.

  A specimen having an initial shape of 50 mm × 50 mm × 5 mm was subjected to rolling up to a thickness of 1 mm at a sample temperature of 673 K (preheating time of 20 min), a rolling speed of 5 m / min, and a rolling reduction of 15% per pass. Moreover, the heat processing of 618K (60min) was implemented after rolling. The roll diameter was 152 mm and the roll temperature was 353K. On the other hand, a pure Mg rolled material was produced as a comparative material. In order to unify the crystal grain size, the sample temperature during rolling of pure Mg was 573K. Other processing conditions are the same as those of the Mg alloy containing Ce, La, and Y.

  Furthermore, a commercial magnesium alloy (AZ31B: Mg-3 mass% Al-1 mass% Zn-0.5 mass% Mn) rolled material was produced as a comparative material. A AZ31B magnesium alloy that had undergone 673K (24 hours) pre-heat treatment was used as a test material, and a test material cut into 50 mm × 60 mm × 6 mm by machining was used to produce a rolled material having a thickness of 1 mm. The sample temperature during rolling was 673 K (preheating time 20 min), the rolling speed was 5 m / min, and the rolling reduction per pass was 15%. Moreover, the heat processing of 618K (60min) was implemented after rolling. The roll diameter was 152 mm, and roll heating was not performed.

  In order to produce a press-formed body of the above-mentioned magnesium alloy rolled material, an overhang forming by an Erichsen test was performed. The Eriksen test conforms to JIS Z2247 and JIS B7729. Here, in the Eriksen test, the mold temperature was set to room temperature to 433K. The blank shape was set to φ60 mm (thickness 1 mm) for the convenience of the rolled material shape, and molded bodies of the respective materials were produced. The molding speed was 5 mm / min, and the wrinkle pressing force was 10 kN. Graphite grease was used as the lubricant.

  Table 2 summarizes the results of the Erichsen test at room temperature, 373K, and 433K. The Erichsen value indicates the height (mm) at the time of fracture of the overhang molded article. The rolled material of Mg-0.04 atomic% Ce alloy, Mg-0.04 atomic% La alloy, Mg-0.06 atomic% Y alloy, Mg-0.06 atomic% Mm alloy at room temperature is pure magnesium rolling Compared with the material and the AZ31B rolled material, a high Erichsen value was exhibited at any temperature. That is, at any test temperature, the magnesium alloy rolled material containing trace amounts of Ce, La, and Y showed excellent formability.

  Mg-0.04 atomic% Ce alloy rolled material, Mg-0.04 atomic% La alloy rolled material, Mg-0.06 atomic% Y alloy rolled material, Mg-0.06 atomic% Mm alloy rolled material, pure Mg From the rolled material and the AZ31B rolled material, tensile test pieces having a tensile direction of 0 degrees, 45 degrees, and 90 degrees with respect to the rolling direction were respectively produced. The tensile test piece had a parallel part length of 10 mm, a parallel part width of 5 mm, and a parallel part thickness of 1 mm. These tensile test pieces were subjected to an initial strain rate of 1 mm / min. At the same time, tensile deformation up to a nominal strain of 10% was applied, and then the plate width direction strain and the plate thickness direction strain of the test piece were measured to measure the Rankford value and the average Rankford value.

  Table 3 shows the measurement results of the Rankford value. The Mg-0.04 atom% Ce alloy rolled material, the Mg-0.04 atom% La alloy rolled material, and the Mg-0.06 atom% Y alloy rolled material are pure Mg alloys at any angle. In addition, the value was equal to or lower than that of the AZ31B alloy, and the average Rankford value was 1.21 or less. This means that the plastic anisotropy was almost eliminated by adding cerium to magnesium.

  As described above, the present invention relates to a magnesium alloy press-molded body and a method for producing the same, and the present invention relates to a magnesium alloy rolled material to which a small amount of Ce, La, and Y are added with an appropriate composition and heat treatment conditions. As a result, it is possible to provide a magnesium alloy press-molded body that can achieve molding at a low temperature. The magnesium alloy press-molded body of the present invention can be actively applied mainly to home appliance press-molded bodies such as digital cameras, notebook computers, PDAs, etc., and its industrial significance is great. I can say that.

The (0002) plane texture of Mg-0.04 atomic% Ce and pure Mg rolled material used in the examples is shown. (A) is a texture of the Mg-0.04 atomic% Ce alloy rolled material, and (b) is a texture of the pure magnesium alloy rolled material. The texture measurement is carried out at the center with respect to the thickness direction. The maximum value represents the ratio with the peak intensity of the (0002) plane texture obtained from pure magnesium powder.

Claims (12)

The total amount of Ce + La + Y is 0.01 atomic% to 0. A press-molded body made of a magnesium alloy that is made of a magnesium alloy rolled material that is 06 atomic%, has impurities that are inevitably mixed in, and the remainder is made of magnesium,
A magnesium alloy press-molded product, wherein an average Rankford value of a rolled magnesium alloy material is 1.25 or less at room temperature. The total amount of Ce is 0.01 atomic% to 0. A press-molded body made of a magnesium alloy that is made of a magnesium alloy rolled material that is 06 atomic%, has impurities that are inevitably mixed in, and the remainder is made of magnesium,
A magnesium alloy press-molded product, wherein an average Rankford value of a rolled magnesium alloy material is 1.25 or less at room temperature. The total amount of La is 0.01 atomic% to 0. A press-molded body made of a magnesium alloy that is made of a magnesium alloy rolled material that is 06 atomic%, has impurities that are inevitably mixed in, and the remainder is made of magnesium,
A magnesium alloy press-molded product, wherein an average Rankford value of a rolled magnesium alloy material is 1.25 or less at room temperature. The total amount of misch metal in which the total amount of Ce + La is 70% by mass or more is 0.01 atomic% to 0.00%. A press-molded body made of a magnesium alloy that is made of a magnesium alloy rolled material that is 06 atomic%, has impurities that are inevitably mixed in, and the remainder is made of magnesium,
A magnesium alloy press-molded product, wherein an average Rankford value of a rolled magnesium alloy material is 1.25 or less at room temperature. The total amount of Y is 0.01 atomic% to 0. A press-molded body made of a magnesium alloy that is made of a magnesium alloy rolled material that is 06 atomic%, has impurities that are inevitably mixed in, and the remainder is made of magnesium,
A magnesium alloy press-molded product, wherein an average Rankford value of a rolled magnesium alloy material is 1.25 or less at room temperature.   A magnesium alloy member comprising the magnesium alloy press-formed product according to any one of claims 1 to 5. The total amount of Ce + La + Y is 0.01 atomic% to 0. After forming a magnesium alloy rolled material having a content of 06 atomic% and other impurities inevitably mixed and the balance being magnesium, annealing at 300 to 450 ° C. for 10 minutes or more, and then forming at a sample temperature of 160 ° C. or less A method for producing a magnesium alloy press-molded body. The total amount of Ce is 0.01 atomic% to 0. After forming a magnesium alloy rolled material having a content of 06 atomic% and other impurities inevitably mixed and the balance being magnesium, annealing at 300 to 450 ° C. for 10 minutes or more, and then forming at a sample temperature of 160 ° C. or less A method for producing a magnesium alloy press-molded body. The total amount of La is 0.01 atomic% to 0. After forming a magnesium alloy rolled material having a content of 06 atomic% and other impurities inevitably mixed and the balance being magnesium, annealing at 300 to 450 ° C. for 10 minutes or more, and then forming at a sample temperature of 160 ° C. or less A method for producing a magnesium alloy press-molded body. The total amount of misch metal in which the total amount of Ce + La is 70% by mass or more is 0.01 atomic% to 0.00%. After forming a magnesium alloy rolled material having a content of 06 atomic% and other impurities inevitably mixed and the balance being magnesium, annealing at 300 to 450 ° C. for 10 minutes or more, and then forming at a sample temperature of 160 ° C. or less A method for producing a magnesium alloy press-molded body. The total amount of Y is 0.01 atomic% to 0. After forming a magnesium alloy rolled material having a content of 06 atomic% and other impurities inevitably mixed and the balance being magnesium, annealing at 300 to 450 ° C. for 10 minutes or more, and then forming at a sample temperature of 160 ° C. or less A method for producing a magnesium alloy press-molded body.   The manufacturing method of the magnesium alloy press-molded body according to any one of claims 7 to 11, wherein annealing is performed at 300 to 450 ° C under annealing conditions and holding time of 10 minutes or more.

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