JPH0665669A - Heat resistant mg alloy and its production - Google Patents
Heat resistant mg alloy and its productionInfo
- Publication number
- JPH0665669A JPH0665669A JP22551492A JP22551492A JPH0665669A JP H0665669 A JPH0665669 A JP H0665669A JP 22551492 A JP22551492 A JP 22551492A JP 22551492 A JP22551492 A JP 22551492A JP H0665669 A JPH0665669 A JP H0665669A
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- Prior art keywords
- alloy
- heat
- resistant
- weight
- intermetallic compound
- Prior art date
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は耐熱Ｍｇ合金、特に、低
比重で、且つ高融点の金属間化合物をＭｇマトリックス
に分散させた耐熱Ｍｇ合金に関する。TECHNICAL FIELD The present invention relates to a heat-resistant Mg alloy, and more particularly to a heat-resistant Mg alloy in which an intermetallic compound having a low specific gravity and a high melting point is dispersed in a Mg matrix.
【０００２】[0002]
【従来の技術】従来、この種耐熱Ｍｇ合金としては、前
記金属間化合物であるＭｇ2 Ｓｉを含有し、鋳造法によ
って製造されたものが知られている（例えば、特公昭４
３−２０８９２号公報参照）。2. Description of the Related Art Heretofore, as this kind of heat-resistant Mg alloy, there has been known one containing the above-mentioned intermetallic compound Mg 2 Si and manufactured by a casting method (for example, Japanese Patent Publication No.
3-20892).
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、鋳造法
によるＭｇ2 Ｓｉの微細化には限界があり、例えば、よ
り一層の耐熱強度の向上を狙ってＳｉ含有量を２０重量
％程度と高く設定してＭｇ2 Ｓｉの晶出量を増すと、そ
の微細化および均一分散を十分に達成することができな
い場合があった。However, there is a limit to the refining of Mg 2 Si by the casting method, and for example, the Si content is set as high as about 20% by weight in order to further improve the heat resistance strength. If the amount of Mg 2 Si crystallized is increased by such a method, it may not be possible to sufficiently achieve fineness and uniform dispersion.
【０００４】本発明は前記に鑑み、前記金属間化合物の
微細化と均一分散とを達成すると共にその金属間化合物
の含有範囲を拡張し、これにより要求耐熱強度を容易に
満たすことができるようにした前記耐熱Ｍｇ合金および
その製造方法を提供することを目的とする。In view of the above, the present invention achieves miniaturization and uniform dispersion of the intermetallic compound and expands the content range of the intermetallic compound so that the required heat resistance strength can be easily satisfied. It is an object of the present invention to provide the above heat-resistant Mg alloy and a method for producing the same.
【０００５】[0005]
【課題を解決するための手段】本発明に係る耐熱Ｍｇ合
金は、ＬＤＣプロセス、それに次ぐ塑性加工法の適用下
で製造され、Ｓｉ、ＧｅおよびＳｂから選択される少な
くとも一種の合金元素ＡＥの含有量が１．３重量％≦Ａ
Ｅ≦２０重量％であって、その合金元素ＡＥおよびＭｇ
よりなる低比重で、且つ高融点の微細金属間化合物が均
一に分散していることを特徴とする。The heat-resistant Mg alloy according to the present invention is produced under the application of the LDC process and the subsequent plastic working method, and contains at least one alloy element AE selected from Si, Ge and Sb. The amount is 1.3% by weight ≦ A
E ≦ 20% by weight and its alloying elements AE and Mg
It is characterized in that a fine intermetallic compound having a low specific gravity and a high melting point is uniformly dispersed.
【０００６】本発明に係る耐熱Ｍｇ合金の製造方法は、
Ｓｉ、ＧｅおよびＳｂから選択される少なくとも一種の
合金元素ＡＥを１．３重量％≦ＡＥ≦２０重量％含有す
るＭｇ合金組成の素材を用いてＬＤＣプロセスを行うこ
とにより多孔性中間体を製造し、次いでその多孔性中間
体に塑性加工を施すことを特徴とする。The method for producing a heat-resistant Mg alloy according to the present invention comprises:
A porous intermediate is manufactured by performing an LDC process using a material of a Mg alloy composition containing 1.3% by weight ≦ AE ≦ 20% by weight of at least one alloying element AE selected from Si, Ge and Sb. Then, the porous intermediate is subjected to plastic working.
【０００７】[0007]
【作用】ＬＤＣ（liquid dynamic compaction)プロセス
とは、例えば溶湯より溶滴流を形成してその溶滴流を所
定の速度で落下させ、下方に設置されたコレクタ内にお
ける溶滴の衝突、溶着および再凝固による堆積作用によ
って多孔性金属塊を得る方法であって、このプロセスに
はオスプレイ(Osprey)プロセス、ＶＡＤＥＲ(vacuum ar
c double electrode remelting) プロセス等が含まれ
る。In the LDC (liquid dynamic compaction) process, for example, a droplet flow is formed from a molten metal, the droplet flow is dropped at a predetermined speed, and the droplets collide, weld and collide in a collector installed below. A method for obtaining a porous metal mass by a deposition action by resolidification, which includes an Osprey process and a VADER (vacuum ar) process.
c double electrode remelting) process etc. are included.
【０００８】ＬＤＣプロセスによれば、溶滴の再凝固が
急速に行われるので、金属間化合物がデンドライト状に
晶出することがない。また多孔性金属塊は溶滴の集合物
であるから、その金属塊における金属間化合物の分散が
均一となる。このような金属塊に塑性加工を施すと、製
品の高密度化が達成される。According to the LDC process, the re-solidification of the droplets is carried out rapidly, so that the intermetallic compound does not crystallize in a dendrite form. Further, since the porous metal block is an aggregate of droplets, the intermetallic compound is uniformly dispersed in the metal block. By subjecting such a metal block to plastic working, high density of the product is achieved.
【０００９】前記耐熱Ｍｇ合金は前記のような方法によ
って得られたものであるから、それに含有される金属間
化合物は微細であり、その分散も均一となる。また前記
合金元素ＡＥとＭｇよりなる微細金属間化合物は低比重
で、且つ高融点である。その上、合金元素ＡＥの含有範
囲、したがって微細金属間化合物の含有範囲が拡張され
ているので、耐熱Ｍｇ合金に対する要求耐熱強度を容易
に満たすことが可能である。Since the heat-resistant Mg alloy is obtained by the above method, the intermetallic compound contained therein is fine and the dispersion thereof is uniform. Further, the fine intermetallic compound composed of the alloy elements AE and Mg has a low specific gravity and a high melting point. In addition, since the content range of the alloy element AE, that is, the content range of the fine intermetallic compound is expanded, it is possible to easily satisfy the required heat resistance strength for the heat resistant Mg alloy.
【００１０】ただし、合金元素ＡＥの含有量がＡＥ＜
１．３重量％では微細金属間化合物の含有量が少なくな
って十分な耐熱強度を得ることができず、一方、ＡＥ＞
２０重量％では素材の融点が上昇するため製法上の困難
が生じたり、また金属間化合物の含有量が過大となって
室温下でのＭｇ合金の靱性が低下する。However, if the content of the alloy element AE is AE <
If it is 1.3% by weight, the content of the fine intermetallic compound is small and sufficient heat resistance cannot be obtained. On the other hand, AE>
If the content is 20% by weight, the melting point of the material rises, which causes difficulties in the manufacturing method, and the content of the intermetallic compound becomes excessive, so that the toughness of the Mg alloy at room temperature decreases.
【００１１】[0011]
【実施例】耐熱Ｍｇ合金の製造に当っては、Ｓｉ、Ｇｅ
およびＳｂから選択される少なくとも一種の合金元素Ａ
Ｅを１．３重量％≦ＡＥ≦２０重量％含有するＭｇ合金
組成の素材を溶製する工程と、その素材を用いてＬＤＣ
プロセスとしてのオスプレイプロセスを行うことにより
多孔性中間体を製造する工程と、その中間体の外周部に
切削加工を施して所定の寸法に仕上げる工程と、中間体
に塑性加工としての熱間押出し加工を施す工程とを順次
行うものである。[Example] In manufacturing a heat-resistant Mg alloy, Si, Ge
And at least one alloying element A selected from Sb
A step of smelting a material of a Mg alloy composition containing 1.3% by weight ≦ AE ≦ 20% by weight of E, and an LDC using the material
The process of manufacturing a porous intermediate body by performing the Osprey process as a process, the step of cutting the outer periphery of the intermediate body to finish it to a predetermined size, and the hot extrusion process as a plastic working on the intermediate body And the step of applying are sequentially performed.
【００１２】素材において、合金元素ＡＥであるＳｉ、
ＧｅおよびＳｂは、Ｍｇに殆ど固溶しないことからＭｇ
と化合して低比重で、且つ高融点の金属間化合物（以
下、ＩＭＣと称す）を形成する。そのＩＭＣは、Ｓｉの
場合Ｍｇ2 Ｓｉ（比重１．９、融点１１０２℃）であ
り、Ｇｅの場合Ｍｇ2 Ｇｅ（比重３．１、融点１１１５
℃）であり、Ｓｂの場合α−Ｍｇ3 Ｓｂ2 （比重４．
１、融点９３０℃）である。In the material, Si, which is the alloying element AE,
Ge and Sb do not form a solid solution with Mg, so Mg
To form an intermetallic compound having a low specific gravity and a high melting point (hereinafter referred to as IMC). The IMC is Mg 2 Si (specific gravity 1.9, melting point 1102 ° C.) in the case of Si, and Mg 2 Ge (specific gravity 3.1, melting point 1115 in the case of Ge).
C), and in the case of Sb α-Mg 3 Sb 2 (specific gravity 4.
1, melting point 930 ° C.).
【００１３】オスプレイプロセスは、図１に示すような
装置を用いて行われる。即ち、溶解炉１内で素材を溶解
して溶湯２を調製する、溶解炉１底部外面に付設された
霧化機構３のガス導入管４に高圧Ｎ2 ガスを導入し、そ
のＮ2 ガスと共に溶湯２をノズル５から下向きに噴出さ
せることによって溶滴流６を形成する、その溶滴流６を
コレクタ７によって受容する、コレクタ７内における堆
積物量に応じてそのコレクタ７を昇降台８を介して下降
させ、所定の体積をもつ多孔性中間体９を得る。図中、
１０はノックアウト用ピン孔である。The Osprey process is carried out using a device as shown in FIG. That is, high-pressure N 2 gas is introduced into the gas introduction pipe 4 of the atomization mechanism 3 attached to the outer surface of the bottom of the melting furnace 1 for preparing the molten metal 2 by melting the raw material in the melting furnace 1 and together with the N 2 gas. A droplet stream 6 is formed by jetting the molten metal 2 downward from a nozzle 5, the droplet stream 6 is received by a collector 7, and the collector 7 is passed through an elevator 8 according to the amount of deposits in the collector 7. Then, the porous intermediate body 9 having a predetermined volume is obtained. In the figure,
10 is a pin hole for knockout.
【００１４】このようなプロセスによると溶滴の冷却速
度は１０2 〜１０3 ℃／sec といったように高められる
ので、その溶滴の再凝固に際し、ＩＭＣがデンドライト
状に成長することがなく、これにより微細ＩＭＣを均一
に分散させた多孔性中間体９が得られる。According to such a process, the cooling rate of the droplets can be increased to 10 2 to 10 3 ° C / sec, so that upon resolidification of the droplets, the IMC does not grow in the form of dendrite. Thus, a porous intermediate body 9 in which fine IMCs are uniformly dispersed is obtained.
【００１５】以下、具体例について説明する。A specific example will be described below.
【００１６】純度９９．９９％のＭｇインゴットおよび
純度９９．７％のＳｉフレークをＡｒガス雰囲気下で高
周波溶解し、次いでＣｕ製金型を用いて鋳込作業を行う
ことにより、Ｓｉ含有量を０．５〜２５．０重量％の範
囲で調節された複数のＭｇ合金組成の素材を溶製した。A Mg ingot having a purity of 99.99% and a Si flake having a purity of 99.7% were subjected to high-frequency melting under an Ar gas atmosphere, and then a casting operation was carried out using a Cu mold to reduce the Si content. A plurality of Mg alloy composition materials adjusted in the range of 0.5 to 25.0% by weight were melted.
【００１７】各素材を用いてオスプレイプロセスを行う
ことにより、直径５０mm、長さ６０mmの多孔性中間体を
製造した。オスプレイプロセスの条件は、溶湯温度７５
０℃、Ｎ2 ガスの圧力５kgｆ／cm2 、ノズルおよびコレ
クタ（または堆積物）間の距離３０mm、冷却速度５×１
０2 ℃／sec に設定された。An Osprey process was performed using each material to produce a porous intermediate body having a diameter of 50 mm and a length of 60 mm. The conditions for the Osprey process are a melt temperature of 75
0 ° C., N 2 gas pressure 5 kgf / cm 2 , distance between nozzle and collector (or deposit) 30 mm, cooling rate 5 × 1
It was set to 0 2 ° C / sec.
【００１８】各中間体の外周部に切削加工を施して直径
を４０mmに仕上げ、その中間体に押出し温度３５０℃、
押出し比１６の条件下で熱間押出し加工を施して直径１
０mmの丸棒状をなすＭｇ−Ｓｉ系合金（１）〜（１０）
を得た。The outer periphery of each intermediate body is cut to a diameter of 40 mm, and the intermediate body is extruded at a temperature of 350 ° C.
Hot extrusion under conditions of extrusion ratio 16 and diameter 1
0 mm round bar Mg-Si alloys (1) to (10)
Got
【００１９】比較のため、前記ＭｇインゴットおよびＳ
ｉフレークを用い、溶解および鋳造を行うことによって
Ｓｉ含有量を異にする直径１０mmの丸棒状をなす２種の
Ｍｇ−Ｓｉ系合金（１１），（１２）を得た。この場合
の冷却速度は１０0 〜１０1℃／sec であった。For comparison, the Mg ingot and S
Two types of Mg-Si alloys (11) and (12) in the form of round rods having different Si contents and having a diameter of 10 mm were obtained by melting and casting using i-flakes. The cooling rate in this case was 10 0 ~10 1 ℃ / sec.
【００２０】各Ｍｇ−Ｓｉ系合金（１）〜（１２）につ
いて、ＩＭＣの粒径Ｄおよび体積分率Ｖｆを調べ、また
室温および２００℃において引張り試験を行って引張強
さＴＳ、耐力ＹＳおよび伸びＥL を測定したところ、表
１の結果が得られた。表中、評価の欄において、「○」
印は耐熱Ｍｇ合金として適当であることを、また「×」
印は耐熱Ｍｇ合金として不適当であることをそれぞれ示
す。この評価は以下の各表について同じである。For each of the Mg-Si alloys (1) to (12), the grain size D and volume fraction Vf of IMC were examined, and a tensile test was conducted at room temperature and 200 ° C. to obtain tensile strength TS, yield strength YS and When the elongation E L was measured, the results shown in Table 1 were obtained. In the evaluation column of the table, "○"
The mark indicates that it is suitable as a heat-resistant Mg alloy, and "X"
The marks indicate that the heat-resistant Mg alloy is unsuitable. This evaluation is the same for each table below.
【００２１】[0021]
【表１】 表１から明らかなように、Ｍｇ−Ｓｉ系合金（３）〜
（９）はＳｉ含有量が前記範囲に収められており、また
オスプレイプロセスを適用されたことから、適当量の微
細ＩＭＣの均一分散が図られ、その上熱間押出し加工に
よって高密度化が達成されているので、優れた耐熱強度
を有する。[Table 1] As is clear from Table 1, Mg-Si alloys (3)-
In (9), the Si content is within the above range, and since the Osprey process was applied, an appropriate amount of fine IMC was uniformly dispersed, and hot extrusion was performed to achieve high density. Therefore, it has excellent heat resistance.
【００２２】表２は、Ｍｇ−Ｇｅ系合金（１３）〜（２
３）の組成、ＩＭＣの粒径Ｄ、その体積分率Ｖｆならび
に室温および２００℃における引張り試験結果を示す。
合金（１３）〜（２１）はオスプレイプロセスおよび熱
間押出し加工を適用されたものであり、また合金（２
２），（２３）は前記同様の鋳造法により得られたもの
である。Table 2 shows Mg-Ge alloys (13) to (2).
3) The composition of 3), the particle size D of IMC, its volume fraction Vf, and the tensile test results at room temperature and 200 ° C. are shown.
Alloys (13)-(21) have been subjected to the Osprey process and hot extrusion, and alloys (2)
2) and (23) are obtained by the same casting method as described above.
【００２３】[0023]
【表２】 表３は、オスプレイプロセスおよび熱間押出し加工を適
用されたＭｇ−Ｓｂ系合金（２４）〜（３０）の組成、
ＩＭＣの粒径Ｄ、その体積分率Ｖｆならびに室温および
２００℃における引張り試験結果を示す。[Table 2] Table 3 shows the composition of the Mg-Sb based alloys (24) to (30) that have been subjected to the Osprey process and hot extrusion.
The particle diameter D of IMC, its volume fraction Vf, and the tensile test result in room temperature and 200 degreeC are shown.
【００２４】[0024]
【表３】 表４は、オスプレイプロセスおよび熱間押出し加工を適
用されたＭｇ−Ｓｉ−Ｇｅ系合金（３１）〜（４０）の
組成、ＩＭＣの粒径Ｄ、その体積分率Ｖｆならびに室温
および２００℃における引張り試験結果を示す。[Table 3] Table 4 shows the composition of the Mg-Si-Ge based alloys (31) to (40) subjected to the Osprey process and the hot extrusion process, the grain size D of IMC, the volume fraction Vf thereof, and the tensile strength at room temperature and 200 ° C. The test results are shown.
【００２５】[0025]
【表４】 表５は、オスプレイプロセスおよび熱間押出し加工を適
用されたＭｇ−Ｓｉ−Ｇｅ−Ｓｂ系合金（４１）〜（４
４）の組成、ＩＭＣの粒径Ｄ、その体積分率Ｖｆならび
に室温および２００℃における引張り試験結果を示す。[Table 4] Table 5 shows the Mg-Si-Ge-Sb based alloys (41) to (4) that have been subjected to the Osprey process and hot extrusion.
4) The composition of 4), the particle size D of IMC, its volume fraction Vf, and the tensile test results at room temperature and 200 ° C. are shown.
【００２６】[0026]
【表５】 [Table 5]
【００２７】[0027]
【発明の効果】請求項１記載の発明によれば、低比重
で、且つ高融点の特定金属間化合物の微細化と均一分散
とを達成すると共にその微細金属間化合物の含有範囲を
拡張し、これにより要求耐熱強度を容易に満たすことが
可能な耐熱Ｍｇ合金を提供することができる。According to the invention of claim 1, the specific intermetallic compound having a low specific gravity and high melting point can be finely divided and uniformly dispersed, and the content range of the fine intermetallic compound can be expanded. This makes it possible to provide a heat-resistant Mg alloy that can easily satisfy the required heat-resistant strength.
【００２８】請求項３記載の発明によれば、前記耐熱Ｍ
ｇ合金を容易に量産することができる。According to the invention of claim 3, the heat-resistant M
The g alloy can be easily mass-produced.
【図１】オスプレイプロセスの概略説明図である。FIG. 1 is a schematic explanatory diagram of an Osprey process.
１ 溶解炉 ２ 溶湯 ３ 霧化機構 ４ ガス導入管 ５ ノズル ６ 溶滴流 ７ コレクタ ８ 多孔性中間体 1 Melting Furnace 2 Molten Metal 3 Atomization Mechanism 4 Gas Introducing Pipe 5 Nozzle 6 Droplet Flow 7 Collector 8 Porous Intermediate
Claims (3)
の適用下で製造され、Ｓｉ、ＧｅおよびＳｂから選択さ
れる少なくとも一種の合金元素ＡＥの含有量が１．３重
量％≦ＡＥ≦２０重量％であって、その合金元素ＡＥお
よびＭｇよりなる低比重で、且つ高融点の微細金属間化
合物が均一に分散していることを特徴とする耐熱Ｍｇ合
金。1. An LDC process, which is manufactured under the application of a plastic working method subsequent to the LDC process, and the content of at least one alloying element AE selected from Si, Ge and Sb is 1.3% by weight ≦ AE ≦ 20% by weight. A heat-resistant Mg alloy, characterized in that a fine intermetallic compound having a low specific gravity and a high melting point, which is composed of the alloy elements AE and Mg, is uniformly dispersed.
０μｍである、請求項１記載の耐熱Ｍｇ合金。2. The particle size D of the fine intermetallic compound is D ≦ 1.
The heat-resistant Mg alloy according to claim 1, which has a thickness of 0 μm.
なくとも一種の合金元素ＡＥを１．３重量％≦ＡＥ≦２
０重量％含有するＭｇ合金組成の素材を用いてＬＤＣプ
ロセスを行うことにより多孔性中間体を製造し、次いで
その多孔性中間体に塑性加工を施すことを特徴とする耐
熱Ｍｇ合金の製造方法。3. At least one alloy element AE selected from Si, Ge and Sb is 1.3% by weight ≦ AE ≦ 2.
A method for producing a heat-resistant Mg alloy, which comprises subjecting a porous intermediate to a LDC process using a Mg alloy composition containing 0% by weight, and then subjecting the porous intermediate to plastic working.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22551492A JPH0665669A (en) | 1992-08-25 | 1992-08-25 | Heat resistant mg alloy and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22551492A JPH0665669A (en) | 1992-08-25 | 1992-08-25 | Heat resistant mg alloy and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0665669A true JPH0665669A (en) | 1994-03-08 |
Family
ID=16830512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22551492A Pending JPH0665669A (en) | 1992-08-25 | 1992-08-25 | Heat resistant mg alloy and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0665669A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19853632B4 (en) * | 1997-11-20 | 2006-10-26 | Ricoh Co., Ltd. | Image processing device |
| JP2011074469A (en) * | 2009-09-30 | 2011-04-14 | Fuji Heavy Ind Ltd | Method for producing silicon added magnesium alloy |
| CN102978494A (en) * | 2012-12-13 | 2013-03-20 | 北京大学 | Mg-Ge magnesium alloy and preparation method thereof |
| JP2017179541A (en) * | 2016-03-31 | 2017-10-05 | アイシン・エィ・ダブリュ株式会社 | Magnesium alloy for casting and magnesium alloy cast |
-
1992
- 1992-08-25 JP JP22551492A patent/JPH0665669A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19853632B4 (en) * | 1997-11-20 | 2006-10-26 | Ricoh Co., Ltd. | Image processing device |
| JP2011074469A (en) * | 2009-09-30 | 2011-04-14 | Fuji Heavy Ind Ltd | Method for producing silicon added magnesium alloy |
| CN102978494A (en) * | 2012-12-13 | 2013-03-20 | 北京大学 | Mg-Ge magnesium alloy and preparation method thereof |
| JP2017179541A (en) * | 2016-03-31 | 2017-10-05 | アイシン・エィ・ダブリュ株式会社 | Magnesium alloy for casting and magnesium alloy cast |
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