JPH0881728A - Magnesium alloy having creep resistance and corrosion resistance - Google Patents
Magnesium alloy having creep resistance and corrosion resistanceInfo
- Publication number
- JPH0881728A JPH0881728A JP17594195A JP17594195A JPH0881728A JP H0881728 A JPH0881728 A JP H0881728A JP 17594195 A JP17594195 A JP 17594195A JP 17594195 A JP17594195 A JP 17594195A JP H0881728 A JPH0881728 A JP H0881728A
- Authority
- JP
- Japan
- Prior art keywords
- magnesium alloy
- resistance
- creep resistance
- corrosion resistance
- alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、機械構造物の部品、例
えば自動車部品、電子機器用部品などに利用されるマグ
ネシウム合金に関する。更に詳しくは、特に高温下およ
び腐食環境下で使用される機械構造物の部品、例えば自
動車のトランスミッションケース等に適するマグネシウ
ム合金に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnesium alloy used for parts of mechanical structures such as automobile parts and parts for electronic equipment. More specifically, the present invention relates to a magnesium alloy suitable for parts of mechanical structures used particularly under high temperature and corrosive environments, for example, automobile transmission cases.
【０００２】[0002]
【従来の技術】機械構造物の部品に利用される従来のマ
グネシウム合金としては、例えばＪＩＳ・ＭＣ２合金
（ＡＺ９１）、ＪＩＳ・ＭＣ１０合金（ＺＥ４１Ａ）、
あるいは本出願人が特開平５−２５５７９４号公報にお
いて提案したＭｇ−Ｚｎ−Ｓｉ系のマグネシウム合金が
ある。2. Description of the Related Art Conventional magnesium alloys used for parts of mechanical structures include, for example, JIS / MC2 alloy (AZ91), JIS / MC10 alloy (ZE41A),
Alternatively, there is a Mg—Zn—Si-based magnesium alloy proposed by the present applicant in JP-A-5-255794.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、ＪＩＳ
・ＭＣ２合金、ＪＩＳ・ＭＣ１０合金やＭｇ−Ｚｎ−Ｓ
ｉ系のマグネシウム合金は、機械構造物の部品に利用し
た場合優れた耐クリープ性と同時に優れた耐食性を発揮
するということができないという課題があった。本発明
は、優れた耐クリープ性と共に優れた耐食性を有するマ
グネシウム合金の提供を目的とする。[Problems to be Solved by the Invention] However, JIS
・ MC2 alloy, JIS ・ MC10 alloy and Mg-Zn-S
The i-based magnesium alloy has a problem that it cannot exhibit excellent creep resistance and excellent corrosion resistance at the same time when it is used as a component of a machine structure. It is an object of the present invention to provide a magnesium alloy having excellent corrosion resistance as well as excellent creep resistance.
【０００４】[0004]
【課題を解決するための手段】本発明の耐クリープ性、
耐食性を有するマグネシウム合金は、（１）重量％でＺ
ｎ：４．０〜１５．０％、Ｓｉ：０．５〜３．０％、Ａ
ｌ：０．５〜８．０％と、Ｍｇおよび不可避不純物の残
部とからなる耐クリープ性、耐食性を有するマグネシウ
ム合金、The creep resistance of the present invention,
The magnesium alloy with corrosion resistance is (1) Z% by weight.
n: 4.0 to 15.0%, Si: 0.5 to 3.0%, A
1: Magnesium alloy having 0.5 to 8.0% and the balance of Mg and unavoidable impurities and having creep resistance and corrosion resistance,
【０００５】（２）好ましくはＡｌが１．１〜８．０％
である上記（１）のマグネシウム合金、（３）より好ま
しくはＡｌが１．５〜８．０％である上記（１）のマグ
ネシウム合金、（４）最も好ましくはＡｌが１．９〜
８．０％である上記（１）のマグネシウム合金であり、
また(2) Preferably, Al is 1.1 to 8.0%
The magnesium alloy according to (1) above, (3) more preferably the magnesium alloy according to (1) above wherein Al is 1.5 to 8.0%, (4) most preferably 1.9 to below Al.
The magnesium alloy of (1) above, which is 8.0%,
Also
【０００６】（５）重量％でＺｎ：４．０〜１５．０
％、Ｓｉ：０．５〜３．０％、Ａｌ：０．５〜８．０
％、Ｍｎ：０．１〜０．４％と、Ｍｇおよび不可避不純
物の残部とからなる耐クリープ性、耐食性を有するマグ
ネシウム合金、(5) Zn: 4.0-15.0% by weight
%, Si: 0.5 to 3.0%, Al: 0.5 to 8.0
%, Mn: 0.1 to 0.4%, and a magnesium alloy having creep resistance and corrosion resistance, which comprises Mg and the balance of unavoidable impurities.
【０００７】（６）好ましくはＡｌが１．１〜８．０％
である上記（５）のマグネシウム合金、（７）より好ま
しくはＡｌが１．５〜８．０％である上記（５）のマグ
ネシウム合金、（８）最も好ましくはＡｌが１．９〜
８．０％である上記（５）のマグネシウム合金であり、
また(6) Preferably, Al is 1.1 to 8.0%
The magnesium alloy of (5) above, more preferably (7) the magnesium alloy of (5) above, wherein Al is 1.5 to 8.0%, (8) most preferably 1.9 to below Al.
The magnesium alloy of (5) above, which is 8.0%,
Also
【０００８】（９）重量％でＺｎ：４．０〜１５．０
％、Ｓｉ：０．５〜３．０％、Ａｌ：０．５〜８．０
％、Ｂｅ：０．０００５〜０．００２０％と、Ｍｇおよ
び不可避不純物の残部とからなる耐クリープ性、耐食性
を有するマグネシウム合金、(9) Zn: 4.0-15.0% by weight
%, Si: 0.5 to 3.0%, Al: 0.5 to 8.0
%, Be: 0.0005 to 0.0020%, and a magnesium alloy having creep resistance and corrosion resistance, which comprises Mg and the balance of unavoidable impurities.
【０００９】（１０）好ましくはＡｌが１．１〜８．０
％である上記（９）のマグネシウム合金、（１１）より
好ましくはＡｌが１．５〜８．０％である上記（９）の
マグネシウム合金、（１２）最も好ましくはＡｌが１．
９〜８．０％である上記（９）のマグネシウム合金であ
り、また(10) Preferably, Al is 1.1 to 8.0.
%, The magnesium alloy of (9) above, (11) more preferably the magnesium alloy of (9) above with 1.5 to 8.0%, (12) most preferably Al below 1.
The magnesium alloy according to (9) above, which is 9 to 8.0%,
【００１０】（１３）重量％でＺｎ：４．０〜１５．０
％、Ｓｉ：０．５〜３．０％、Ａｌ：０．５〜８．０
％、Ｍｎ：０．１〜０．４％、Ｂｅ：０．０００５〜
０．００２０％と、Ｍｇおよび不可避不純物の残部とか
らなる耐クリープ性、耐食性を有するマグネシウム合
金、(13) wt% Zn: 4.0-15.0
%, Si: 0.5 to 3.0%, Al: 0.5 to 8.0
%, Mn: 0.1 to 0.4%, Be: 0.00055
A magnesium alloy having 0.0020% and the balance of Mg and unavoidable impurities and having creep resistance and corrosion resistance,
【００１１】（１４）好ましくはＡｌが１．１〜８．０
％である上記（１３）のマグネシウム合金、（１５）よ
り好ましくはＡｌが１．５〜８．０％である上記（１
３）のマグネシウム合金、（１６）最も好ましくはＡｌ
が１．９〜８．０％である上記（１３）のマグネシウム
合金、である。(14) Preferably, Al is 1.1 to 8.0.
%, The magnesium alloy of (13) above, more preferably (15) Al of 1.5 to 8.0% above (1).
3) magnesium alloy, (16) most preferably Al
Is 1.9 to 8.0%, and the magnesium alloy according to (13) above.
【００１２】次に本発明に係るマグネシウム合金の成分
組成の限定理由について説明する。 Ｚｎ：４．０〜１５．０％ Ｚｎは耐クリープ性の向上を目的としてマグネシウム合
金中に添加するが、マグネシウム合金中のＺｎの量が
４．０％未満ではＭｇ−Ｚｎ化合物の析出量が少なく、
十分な耐クリープ性が得られない。また、マグネシウム
合金中のＺｎの量が１５％を超えると耐食性が低下す
る。Next, the reasons for limiting the composition of the magnesium alloy of the present invention will be described. Zn: 4.0-15.0% Zn is added to the magnesium alloy for the purpose of improving creep resistance, but if the amount of Zn in the magnesium alloy is less than 4.0%, the amount of precipitation of the Mg-Zn compound is Less
Sufficient creep resistance cannot be obtained. Further, if the amount of Zn in the magnesium alloy exceeds 15%, the corrosion resistance is reduced.
【００１３】Ｓｉ：０．５〜３．０％ マグネシウム合金中にＳｉを添加すると耐クリープ性が
向上する。マグネシウム合金中のＳｉの添加量が０．５
％未満ではＭｇ−Ｓｉ化合物の析出量が少なく十分な耐
クリープ性が得られない。マグネシウム合金中のＳｉの
添加量が３．０％を超えると液相線温度が高くなるため
溶湯の取扱が困難になり、またＭｇ−Ｓｉ化合物が粗大
となり十分な耐クリープ性が得られない。Si: 0.5 to 3.0% Creep resistance is improved by adding Si to a magnesium alloy. The amount of Si added to the magnesium alloy is 0.5
If it is less than%, the amount of precipitation of the Mg-Si compound is small and sufficient creep resistance cannot be obtained. When the amount of Si added in the magnesium alloy exceeds 3.0%, the liquidus temperature becomes high, which makes it difficult to handle the molten metal, and the Mg—Si compound becomes coarse, so that sufficient creep resistance cannot be obtained.
【００１４】Ａｌ：０．５〜８．０％ マグネシウム合金中にＡｌを添加すると耐食性が向上す
るが、マグネシウム合金中のＡｌの添加量が０．５％未
満では耐食性の改善効果は認められない。また、マグネ
シウム合金中のＡｌの添加量が８．０％を超えると耐ク
リープ性に悪影響を及ぼすＭｇ−Ａｌ化合物が析出する
ため、十分な耐クリープ性を得ることができなくなる。Al: 0.5 to 8.0% When Al is added to the magnesium alloy, the corrosion resistance is improved, but when the amount of Al added in the magnesium alloy is less than 0.5%, the effect of improving the corrosion resistance is not recognized. . Further, if the amount of Al added in the magnesium alloy exceeds 8.0%, a Mg-Al compound that adversely affects the creep resistance is precipitated, so that sufficient creep resistance cannot be obtained.
【００１５】本発明のマグネシウム合金が優れた耐クリ
ープ性を有するのは、マトリックス中にＭｇ−Ｚｎ化合
物およびＭｇ−Ｓｉ化合物が分散析出して結晶粒内およ
び結晶粒界のすべりが抑制されるためと推察される。ま
た、優れた耐食性を有するのはＡｌがマトリックス中に
固溶することによってマトリックスの電位が変化したた
めと推察される。なお、本発明のマグネシウム合金から
各種の鋳造方法、即ちダイカスト法、金型鋳造法、砂型
鋳造法等を採用して製品を製造することができる。以下
に実施例により本発明を詳細に説明する。The magnesium alloy of the present invention has excellent creep resistance because the Mg-Zn compound and the Mg-Si compound are dispersed and precipitated in the matrix to prevent slippage in the crystal grains and in the crystal grain boundaries. It is presumed that. Further, it is presumed that the excellent corrosion resistance is due to the change in the potential of the matrix due to the solid solution of Al in the matrix. A product can be manufactured from the magnesium alloy of the present invention by employing various casting methods, such as a die casting method, a die casting method, and a sand casting method. The present invention will be described in detail below with reference to examples.
【００１６】[0016]
【実施例】表１に示す各組成の合金をそれぞれＳＦ6ガ
スの雰囲気の下で溶製した。これらの合金を図１〜図３
（単位：ｍｍ）に示す金型試験片鋳型１に鋳造し供試材
を製造した。比較例５は特開平５−２５５７９４号公報
記載のＭｇ−Ｚｎ−Ｓｉ系のマグネシウム合金であり、
合金の成分組成は重量％でＺｎ：９．０％、Ｓｉ：０．
９％、残部はＭｇである。比較例９はＪＩＳ・ＭＣ２合
金（ＡＺ９１）であり、この試験に用いた成分組成は重
量％でＡｌ：８．９％、Ｚｎ：０．７％、Ｍｎ：０．２
３％、Ｂｅ：０．００１５％、残部がＭｇである。EXAMPLE Alloys having the compositions shown in Table 1 were melted under the atmosphere of SF 6 gas. These alloys are shown in FIGS.
A test piece was manufactured by casting in a mold test piece mold 1 shown in (unit: mm). Comparative Example 5 is a Mg-Zn-Si-based magnesium alloy described in JP-A-5-255794,
The composition of the alloy is such that Zn: 9.0% and Si: 0.
9%, balance Mg. Comparative Example 9 is a JIS MC2 alloy (AZ91), and the composition of components used in this test is Al: 8.9%, Zn: 0.7%, Mn: 0.2 by weight%.
3%, Be: 0.0015%, the balance being Mg.
【００１７】比較例１０はＪＩＳ・ＭＣ１０合金（ＺＥ
４１Ａ）であり、この試験に用いた成分組成はＺｎ：
４．０％、Ｒｅ：１．４％、Ｚｒ：０．７％、残部がＭ
ｇである。なお、比較例１０のマグネシウム合金に対し
ては１８０℃×１６時間の加熱処理を行った後、空冷の
時効処理を行った。Comparative Example 10 is a JIS / MC10 alloy (ZE
41A), and the component composition used in this test was Zn:
4.0%, Re: 1.4%, Zr: 0.7%, balance M
g. The magnesium alloy of Comparative Example 10 was heat-treated at 180 ° C. for 16 hours and then air-cooled.
【００１８】[0018]
【表１】 [Table 1]
【００１９】耐クリープ性の評価試験結果を表２に示
す。ボルトの締結トルクの低下が小さいほど耐クリープ
性に優れることが知られており、ここでは高温保持後の
ボルトの締結トルクの低下により耐クリープ性を評価し
た。詳しくは、供試材を室温においてＭ８のボルトナッ
トをトルクレンチを用いて締結し、保持温度１００℃お
よび１５０℃、保持時間１００時間で熱処理し室温まで
冷却後、トルクレンチで再度締め直す。ボルトナットが
再度締まり始めた時のトルク値（ｂとする）と、初期の
締結トルク値（ａとする）を用い次式により締結トルク
低下率を求めた。 また、初期の締結トルク値は所定の保持温度へ昇温直後
に面圧１００ＭＰａを発生させるように調節した。The results of the creep resistance evaluation test are shown in Table 2. It is known that the smaller the tightening torque of the bolt is, the more excellent the creep resistance is. The creep resistance is evaluated by the decrease of the tightening torque of the bolt after being kept at high temperature. Specifically, the sample material is fastened with M8 bolts and nuts at room temperature using a torque wrench, heat treated at a holding temperature of 100 ° C. and 150 ° C. for a holding time of 100 hours, cooled to room temperature, and then tightened again with a torque wrench. Using the torque value when the bolts and nuts started to be tightened again (denoted by b) and the initial fastening torque value (denoted by a), the fastening torque reduction rate was calculated by the following equation. The initial fastening torque value was adjusted so that a surface pressure of 100 MPa was generated immediately after the temperature was raised to a predetermined holding temperature.
【００２０】[0020]
【表２】 [Table 2]
【００２１】同じく表２に、ＪＩＳ Ｚ２３７１「塩水
噴霧試験法法」に準拠して塩水噴霧試験を行い４８時間
試験後の腐食減量を測定して得た耐食性の評価結果を示
す。表１、表２に示した結果から明らかなように、実施
例の本発明のマグネシウム合金は比較例１、３、４、
７、８、９のマグネシウム合金に比べて締結トルク低下
率が小さい値を示しており、耐クリープ性に優れたもの
となっている。また、比較例２、５、６、１０のマグネ
シウム合金に比べて腐食減量も低い値を示しており耐食
性に優れている。Similarly, Table 2 shows the corrosion resistance evaluation results obtained by conducting a salt spray test in accordance with JIS Z2371 "Salt spray test method" and measuring the corrosion weight loss after 48 hours of the test. As is clear from the results shown in Tables 1 and 2, the magnesium alloys of the present invention of Examples are Comparative Examples 1, 3, 4,
The reduction rate of the fastening torque is smaller than that of the magnesium alloys 7, 8 and 9 and the creep resistance is excellent. Further, the corrosion weight loss is lower than that of the magnesium alloys of Comparative Examples 2, 5, 6, and 10, and the corrosion resistance is excellent.
【００２２】[0022]
【発明の効果】本発明のマグネシウム合金は耐クリープ
性と耐食性が共に優れているので、高温下および腐食環
境下で使用される機械構造物の部品、例えば自動車のト
ランスミッションケース等の鋳造に適している。INDUSTRIAL APPLICABILITY The magnesium alloy of the present invention has excellent creep resistance and corrosion resistance, and therefore is suitable for casting parts of machine structures used under high temperature and corrosive environments, such as automobile transmission cases. There is.
【図１】この明細書の実施例で使用した金型試験片鋳型
を表す平面図である。FIG. 1 is a plan view showing a mold test piece mold used in an example of the present specification.
【図２】図１のＡ−Ａ線断面図である。FIG. 2 is a sectional view taken along the line AA of FIG.
【図３】図１のＢ−Ｂ線断面図である。FIG. 3 is a sectional view taken along line BB of FIG.
１ 金型試験片鋳型 1 Mold test piece mold
フロントページの続き (72)発明者 椙山 実 山口県宇部市西本町１丁目12番32号 宇部 興産株式会社宇部本社内Front Page Continuation (72) Inventor Minoru Sugiyama 1-12-32 Nishihonmachi, Ube City, Yamaguchi Prefecture Ube Kosan Co., Ltd.
Claims (16)
０％、Ｓｉ：０．５〜３．０％、Ａｌ：０．５〜８．０
％と、Ｍｇおよび不可避不純物の残部とからなる耐クリ
ープ性、耐食性を有するマグネシウム合金。1. Zn: 4.0-15.% By weight.
0%, Si: 0.5 to 3.0%, Al: 0.5 to 8.0
%, And magnesium and the balance of unavoidable impurities, a magnesium alloy having creep resistance and corrosion resistance.
請求項１のマグネシウム合金。2. The magnesium alloy according to claim 1, wherein Al is 1.1 to 8.0%.
請求項１のマグネシウム合金。3. The magnesium alloy according to claim 1, wherein Al is 1.5 to 8.0%.
請求項１のマグネシウム合金。4. The magnesium alloy according to claim 1, wherein Al is 1.9 to 8.0%.
０％、Ｓｉ：０．５〜３．０％、Ａｌ：０．５〜８．０
％、Ｍｎ：０．１〜０．４％と、Ｍｇおよび不可避不純
物の残部とからなる耐クリープ性、耐食性を有するマグ
ネシウム合金。5. Zn: 4.0-15.% By weight.
0%, Si: 0.5 to 3.0%, Al: 0.5 to 8.0
%, Mn: 0.1 to 0.4%, and a magnesium alloy having creep resistance and corrosion resistance, which comprises Mg and the balance of unavoidable impurities.
請求項５のマグネシウム合金。6. The magnesium alloy according to claim 5, wherein Al is 1.1 to 8.0%.
請求項５のマグネシウム合金。7. The magnesium alloy according to claim 5, wherein Al is 1.5 to 8.0%.
請求項５のマグネシウム合金。8. The magnesium alloy according to claim 5, wherein Al is 1.9 to 8.0%.
０％、Ｓｉ：０．５〜３．０％、Ａｌ：０．５〜８．０
％、Ｂｅ：０．０００５〜０．００２０％と、Ｍｇおよ
び不可避不純物の残部とからなる耐クリープ性、耐食性
を有するマグネシウム合金。9. Zn: 4.0-15.% By weight.
0%, Si: 0.5 to 3.0%, Al: 0.5 to 8.0
%, Be: 0.0005 to 0.0020%, and a magnesium alloy having creep resistance and corrosion resistance, which comprises Mg and the balance of unavoidable impurities.
る請求項９のマグネシウム合金。10. The magnesium alloy according to claim 9, wherein Al is 1.1 to 8.0%.
る請求項９のマグネシウム合金。11. The magnesium alloy according to claim 9, wherein Al is 1.5 to 8.0%.
る請求項９のマグネシウム合金。12. The magnesium alloy according to claim 9, wherein Al is 1.9 to 8.0%.
５．０％、Ｓｉ：０．５〜３．０％、Ａｌ：０．５〜
８．０％、Ｍｎ：０．１〜０．４％、Ｂｅ：０．０００
５〜０．００２０％と、Ｍｇおよび不可避不純物の残部
とからなる耐クリープ性、耐食性を有するマグネシウム
合金。13. Zn: 4.0-1 by weight%.
5.0%, Si: 0.5 to 3.0%, Al: 0.5 to
8.0%, Mn: 0.1-0.4%, Be: 0.000
A magnesium alloy having 5 to 0.0020% and the balance of Mg and the unavoidable impurities and having creep resistance and corrosion resistance.
る請求項１３のマグネシウム合金。14. The magnesium alloy according to claim 13, wherein Al is 1.1 to 8.0%.
る請求項１３のマグネシウム合金。15. The magnesium alloy according to claim 13, wherein Al is 1.5 to 8.0%.
る請求項１３のマグネシウム合金。16. The magnesium alloy according to claim 13, wherein Al is 1.9 to 8.0%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17594195A JPH0881728A (en) | 1994-07-12 | 1995-07-12 | Magnesium alloy having creep resistance and corrosion resistance |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6-160055 | 1994-07-12 | ||
| JP16005594 | 1994-07-12 | ||
| JP17594195A JPH0881728A (en) | 1994-07-12 | 1995-07-12 | Magnesium alloy having creep resistance and corrosion resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0881728A true JPH0881728A (en) | 1996-03-26 |
Family
ID=26486658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17594195A Pending JPH0881728A (en) | 1994-07-12 | 1995-07-12 | Magnesium alloy having creep resistance and corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0881728A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006000022A1 (en) * | 2004-06-24 | 2006-01-05 | Cast Centre Pty Ltd | Die cast magnesium alloy |
| JP2009504923A (en) * | 2005-08-17 | 2009-02-05 | マクダーミッド インコーポレーテッド | Pretreatment of magnesium substrate for electroplating |
| WO2018082052A1 (en) * | 2016-11-04 | 2018-05-11 | GM Global Technology Operations LLC | Corrosion resistant magnesium alloy |
| JP2019218577A (en) * | 2018-06-15 | 2019-12-26 | 株式会社戸畑製作所 | Magnesium alloy |
-
1995
- 1995-07-12 JP JP17594195A patent/JPH0881728A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006000022A1 (en) * | 2004-06-24 | 2006-01-05 | Cast Centre Pty Ltd | Die cast magnesium alloy |
| JP2009504923A (en) * | 2005-08-17 | 2009-02-05 | マクダーミッド インコーポレーテッド | Pretreatment of magnesium substrate for electroplating |
| JP4857340B2 (en) * | 2005-08-17 | 2012-01-18 | マクダーミッド インコーポレーテッド | Pretreatment of magnesium substrate for electroplating |
| WO2018082052A1 (en) * | 2016-11-04 | 2018-05-11 | GM Global Technology Operations LLC | Corrosion resistant magnesium alloy |
| CN109923229A (en) * | 2016-11-04 | 2019-06-21 | 通用汽车环球科技运作有限责任公司 | Corrosion-resistant magnesium alloy |
| JP2019218577A (en) * | 2018-06-15 | 2019-12-26 | 株式会社戸畑製作所 | Magnesium alloy |
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