JP3120284B2 - Casting method for amorphous alloy members - Google Patents
Casting method for amorphous alloy membersInfo
- Publication number
- JP3120284B2 JP3120284B2 JP01344176A JP34417689A JP3120284B2 JP 3120284 B2 JP3120284 B2 JP 3120284B2 JP 01344176 A JP01344176 A JP 01344176A JP 34417689 A JP34417689 A JP 34417689A JP 3120284 B2 JP3120284 B2 JP 3120284B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- amorphous alloy
- mold
- molten metal
- casting
- 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.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】 A.発明の目的 （１） 産業上の利用分野 本発明は非晶質合金製部材の鋳造方法、特に、結晶化
温度Txと可塑化温度Tgとの関係がTg＜Txである非晶質合
金を素材とする部材の鋳造方法に関する。DETAILED DESCRIPTION OF THE INVENTION A. Object of the Invention (1) Industrial Field of the Invention The present invention relates to a method for casting a member made of an amorphous alloy, and in particular, the relationship between crystallization temperature Tx and plasticization temperature Tg is Tg <. The present invention relates to a method for casting a member made of an amorphous alloy which is Tx.
（２） 従来の技術 前記非晶質合金組成の溶湯を調製し、その溶湯を用い
て一般的な鋳造方法の適用下、部材を鋳造すると、その
溶湯の凝固過程における結晶化温度Txで結晶化が進行
し、その結果、非晶質成分の体積分率Vfの高い部材を得
ることができない。(2) Prior Art When a melt having the amorphous alloy composition is prepared and a member is cast using the melt under a general casting method, the melt is crystallized at a crystallization temperature Tx in a solidification process of the melt. As a result, a member having a high volume fraction of amorphous component Vf cannot be obtained.
そこで、従来の非晶質合金製部材は、非晶質合金の粉
末より圧粉体を成形し、次いでその圧粉体に熱間塑性加
工を施す、といった手法を用いて製造されている。Therefore, a conventional amorphous alloy member is manufactured by a method of forming a green compact from amorphous alloy powder and then subjecting the green compact to hot plastic working.
（３） 発明が解決しようとする課題 しかしながら、前記従来法においては、熱間塑性加工
時大きな加工比を採用すると、圧粉体の温度が結晶化温
度Txを超えてしまうので、比較的小さな加工比を採用し
ており、その結果、粉末相互間の接合力が弱いため部材
の強度が低く、また部材の密度を向上させることができ
ない、という問題がある。(3) Problems to be Solved by the Invention However, in the conventional method, if a large working ratio is employed during hot plastic working, the temperature of the green compact exceeds the crystallization temperature Tx. As a result, there is a problem that the strength of the member is low because the bonding force between the powders is weak, and the density of the member cannot be improved.
本発明は前記に鑑み、高強度、且つ高密度な非晶質合
金製部材を得ることのできる前記鋳造方法を提供するこ
とを目的とする。In view of the above, an object of the present invention is to provide the casting method capable of obtaining a high-strength, high-density amorphous alloy member.
B.発明の構成 （１） 課題を解決するための手段 本発明は、結晶化温度Txと可塑化温度Tgとの関係がTg
＜Txである非晶質合金組成の溶湯を調製し、次いで前記
溶湯を金型に注入し、その後、前記溶湯を加圧下に保持
し、その加圧終了温度を、部材の結晶化の進行を阻止し
得るように結晶化温度Txよりも低く、且つ固体状態の部
材に対する加圧を回避し得るように可塑化温度Tgよりも
高い温度に設定したことを特徴とする。B. Configuration of the Invention (1) Means for Solving the Problems The present invention relates to a method in which the relationship between the crystallization temperature Tx and the plasticization temperature Tg is Tg.
<Preparing a molten metal having an amorphous alloy composition of Tx, then pouring the molten metal into a mold, and thereafter maintaining the molten metal under pressure, and controlling the temperature at the end of the pressure to determine the progress of crystallization of the member. The temperature is set to be lower than the crystallization temperature Tx so as to prevent the temperature, and higher than the plasticizing temperature Tg so as to avoid pressurization of the solid-state member.
（２） 作 用 結晶化温度Txおよび可塑化温度Tg間の温度において
は、溶湯はゲル状態にあるので、その溶湯を均一に加圧
することができ、また溶湯は金型からの冷却作用を均一
に、且つ十分に受ける。これにより溶湯中の原子の移動
が拘束されて非晶質状態が維持されるので、高強度な部
材が得られ、またその部材の密度も向上する。(2) Operation At a temperature between the crystallization temperature Tx and the plasticization temperature Tg, the molten metal is in a gel state, so that the molten metal can be pressed uniformly, and the molten metal can uniformly cool the mold. And fully received. As a result, the movement of atoms in the molten metal is restricted and the amorphous state is maintained, so that a high-strength member is obtained and the density of the member is improved.
たゞし、結晶化温度Txよりも高温域で加圧を中止する
と、結晶化が進行して非晶質成分の体積分率の高い部材
が得られず、一方、可塑化温度Tgよりも低温域まで加圧
を続行することは、固体状態の部材を加圧することにな
るので、その加圧は部材の強度および密度向上には殆ど
寄与しない。However, if the pressurization is stopped at a temperature higher than the crystallization temperature Tx, crystallization proceeds and a member having a high volume fraction of the amorphous component cannot be obtained, while the temperature is lower than the plasticization temperature Tg. Continuing pressurizing to the region presses the solid-state member, and the pressurization hardly contributes to the strength and density improvement of the member.
（３） 実 施 例 素材として、マグネシウム基非晶質合金（以下、Mg基
合金と称す）であるMg76Ni10Ce10Cr4（数値は原子％）
を選定した。(3) Example As a material, Mg 76 Ni 10 Ce 10 Cr 4 which is a magnesium-based amorphous alloy (hereinafter, referred to as a Mg-based alloy) (the numerical value is atomic%)
Was selected.
第１図はMg基合金の示差熱量分析図であり、この合金
の可塑化温度Tgは184℃、また結晶化温度Txは209℃であ
る（即ち、Tg＜Tx）。FIG. 1 is a diagram showing a differential calorimetric analysis of an Mg-based alloy. The alloy has a plasticization temperature Tg of 184 ° C. and a crystallization temperature Tx of 209 ° C. (that is, Tg <Tx).
第２図は部材を得るための鋳造用金型１を示し、その
金型１は固定の下型２と、昇降自在の上型３とを有し、
両型2,3により部材成形用キャビティ４が画成される。
上型３に、キャビティ４に連通するシリンダ部５が設け
られ、そのシリンダ部５にキャビティ４内の溶湯６を加
圧する加圧プランジャ７が摺動自在に挿入されるように
なっている。FIG. 2 shows a casting mold 1 for obtaining a member. The mold 1 has a fixed lower mold 2 and a vertically movable upper mold 3.
A cavity 4 for molding a member is defined by the two dies 2 and 3.
A cylinder part 5 communicating with the cavity 4 is provided in the upper die 3, and a pressure plunger 7 for pressing the molten metal 6 in the cavity 4 is slidably inserted into the cylinder part 5.
鋳造作業に当っては、金型１を所定の温度に予熱し、
またMg基合金組成の溶湯６を調製する。In the casting operation, the mold 1 is preheated to a predetermined temperature,
Also, a molten metal 6 having an Mg-based alloy composition is prepared.
次いで溶湯６を金型１のキャビティ４に注入した後加
圧プランジャ７をシリンダ部５に摺動させて溶湯６を加
圧する。Next, after the molten metal 6 is injected into the cavity 4 of the mold 1, the pressure plunger 7 is slid on the cylinder portion 5 to press the molten metal 6.
溶湯６の加圧保持時間は、第３図に示すように溶湯６
の温度が溶融状態の温度からTxおよび略Tg間の温度に至
るまでである。略Tgとは、Tg近傍でそれよりも低い温度
を含むという意味である。このことから加圧終了温度に
は、前記のように、部材の結晶化の進行を阻止し得るよ
うに結晶化温度Txよりも低く、且つ固体状態の部材に対
する加圧を回避し得るように可塑化温度Tgよりも高い温
度だけでなく、可塑化温度Tg以下で、且つ固体状態の部
材に対する加圧を回避し得る温度も含まれる。The pressure holding time of the molten metal 6 is, as shown in FIG.
From the temperature in the molten state to the temperature between Tx and approximately Tg. Substantially Tg means that a temperature near Tg and lower than Tg is included. For this reason, as described above, the pressing end temperature is set lower than the crystallization temperature Tx so as to prevent the crystallization of the member from proceeding, and plasticized so as to avoid pressing the solid-state member. Not only a temperature higher than the plasticizing temperature Tg but also a temperature below the plasticizing temperature Tg and capable of avoiding pressurization of the solid-state member is included.
この場合、例えば加圧プランジャ７の加圧スピードは
10mm/secに、加圧力は700kgf/cm2に、キュアタイムは12
0秒間にそれぞれ設定される。In this case, for example, the pressing speed of the pressing plunger 7 is
To 10 mm / sec, applied pressure to 700 kgf / cm 2, curing time 12
Each is set for 0 seconds.
表Ｉは、前記鋳造方法における条件と、それにより得
られた部材Ｉ〜Ｖの物性の関係を示す。Table I shows the relationship between the conditions in the casting method and the physical properties of the members IV obtained thereby.
表Ｉにおいて部材Ｉ〜IVが本発明により得られた部材
に該当し、高密度、且つ高強度であり、また非晶質成分
の体積分率（Vf）が高いことが判る。 In Table I, members I to IV correspond to the members obtained according to the present invention, and have high density and high strength, and have a high volume fraction (Vf) of the amorphous component.
部材I,IIは金型１の予熱温度をTg（184℃）よりも低
く設定した場合であり、また部材III,IVは金型１の予熱
温度をTgよりも高く設定した場合である。部材I,IIおよ
びIII,IVをそれぞれ比較すると明らかなように、金型１
の予熱温度が同一であるときには加圧終了温度を低く設
定した方が優れた物性を得ることができる。The members I and II are cases where the preheating temperature of the mold 1 is set lower than Tg (184 ° C.), and the members III and IV are cases where the preheating temperature of the mold 1 is set higher than Tg. As is clear from comparison of members I and II and III and IV, respectively,
When the preheating temperature is the same, it is possible to obtain excellent physical properties by setting the pressure end temperature low.
また部材I,IIIおよびII,IVをそれぞれ比較すると明ら
かなように、金型１の予熱温度をTgよりも高く設定した
方が優れた物性を得ることができる。これは予熱温度を
190℃程度に設定すると、金型１による溶湯６に対する
部分的冷却を回避し得るからである。As is clear from comparison between the members I and III and the members II and IV, better physical properties can be obtained by setting the preheating temperature of the mold 1 higher than Tg. This is the preheating temperature
If the temperature is set to about 190 ° C., it is possible to avoid partial cooling of the molten metal 6 by the mold 1.
部材Ｖは加圧終了温度がTxよりも高いため、部材Ｉ〜
IVに比べて物性が劣ることが判る。Since the pressing end temperature of the member V is higher than Tx, the members I to
It turns out that physical properties are inferior to IV.
なお、実験の結果、前記加圧手段を採用しない場合に
は、非晶質組織の部材を得ることができないことが判明
している。As a result of an experiment, it has been found that a member having an amorphous structure cannot be obtained without using the pressing means.
表IIは、従来法における条件と、それにより得られた
部材VI〜XIIIの物性との関係を示す。これらの部材VI〜
XIIIは、前記Mg基合金を用い、且つアトマイズ法の適用
による粉末の製造、直径26μｍ以下の非晶質粉末を用
い、且つCIPの適用による圧粉体の成形、罐体への圧粉
体の真空封入、熱間押出し加工の各工程を経て得られた
ものである。Table II shows the relationship between the conditions in the conventional method and the physical properties of the members VI to XIII obtained thereby. These members VI ~
XIII uses the Mg-based alloy, and manufactures a powder by applying an atomizing method, uses an amorphous powder having a diameter of 26 μm or less, and forms a green compact by applying CIP, and forms a green compact into a can body. It is obtained through the steps of vacuum encapsulation and hot extrusion.
表Ｉ、表IIを比べると明らかなように、本発明により
得られた部材Ｉ〜IVは従来法により得られた部材VI〜XI
IIに比べて優れた物性を有することが判る。 As is clear from comparison of Tables I and II, the members I to IV obtained by the present invention are the members VI to XI obtained by the conventional method.
It turns out that it has excellent physical properties compared with II.
従来法による部材VI〜XIIIにおいて、押出し比の低い
ものは低密度であり、また粉末相互間の接合力が弱いた
め、非晶質成分の体積分率が高くても低強度である。一
方、押出し比の高いものは、熱間押出し加工時に圧粉体
の温度がTxを超えてしまうため非晶質成分の体積分率が
低く、それに伴い強度も低下する。Among the members VI to XIII according to the conventional method, those having a low extrusion ratio have a low density, and the bonding strength between the powders is weak, so that even if the volume fraction of the amorphous component is high, the strength is low. On the other hand, when the extrusion ratio is high, the temperature of the green compact exceeds Tx at the time of hot extrusion, so that the volume fraction of the amorphous component is low, and the strength is accordingly reduced.
単ロール法によるMg基合金のリボン材の引張強さは84
kgf/mm2であるが、前記部材VI〜XIIIの強度はリボン材
よりも極端に低い。The tensile strength of the Mg-based alloy ribbon material by the single roll method is 84.
kgf / mm 2 , but the strength of the members VI to XIII is extremely lower than that of the ribbon material.
本発明における溶湯に対する加圧力は、加圧プランジ
ャ７による場合は20kgf/cm2以上に、また、ガスによる
場合には10kgf/cm2以上にそれぞれ制御される。また鋳
造法としては、前記実施例のような溶湯鋳造法の外にダ
イキャスト法等の加圧鋳造法の適用が可能である。In the present invention, the pressure applied to the molten metal is controlled to 20 kgf / cm 2 or more when the pressure plunger 7 is used, and to 10 kgf / cm 2 or more when the gas is used. As the casting method, a pressure casting method such as a die casting method can be applied in addition to the molten metal casting method as in the above embodiment.
なお、結晶化温度Txと可塑化温度Tgとの関係がTg＞Tx
1（第３図）である非晶質合金は本発明の対象には含ま
れない。その理由は、このような合金は、その非晶質状
態を維持するためにTx以下の温度まで加圧下に保持しな
ければならないが、これは固体状態の部材を加圧するこ
とになるので均一加圧状態を現出させることができない
からである。Note that the relationship between the crystallization temperature Tx and the plasticization temperature Tg is Tg> Tx
1 (FIG. 3) is not included in the present invention. The reason for this is that such alloys must be kept under pressure to a temperature below Tx to maintain their amorphous state, but this will press the solid state components and so uniform This is because a pressure state cannot be made to appear.
C.発明の効果 本発明によれば、高強度、且つ高密度であり、また非
晶質成分の体積分率の高い非晶質合金製部材を容易に得
ることができる。C. Effects of the Invention According to the present invention, an amorphous alloy member having a high strength and a high density and a high volume fraction of an amorphous component can be easily obtained.
第１図は非晶質合金の示差熱量分析図、第２図は金型の
断面図、第３図は溶湯の温度とエネルギーとの関係を示
すグラフである。 １……金型、４……部材成形用キャビティ、６……溶
湯、７……加圧プランジャFIG. 1 is a differential calorimetry diagram of an amorphous alloy, FIG. 2 is a cross-sectional view of a mold, and FIG. 3 is a graph showing a relationship between temperature and energy of a molten metal. 1 ... mold, 4 ... cavity for molding members, 6 ... molten metal, 7 ... pressure plunger
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭59−133964（ＪＰ，Ａ) 特開 昭55−149327（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C22C 1/00 B22D 27/00 - 27/09 C22C 45/00 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-59-133964 (JP, A) JP-A-55-149327 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) C22C 1/00 B22D 27/00-27/09 C22C 45/00
Claims (4)
＜Txである非晶質合金組成の溶湯を調製し、次いで前記
溶湯を金型に注入し、その後、前記溶湯を加圧下に保持
し、その加圧終了温度を、部材の結晶化の進行を阻止し
得るように結晶化温度Txよりも低く、且つ固体状態の部
材に対する加圧を回避し得るように可塑化温度Tgよりも
高い温度に設定したことを特徴とする非晶質合金製部材
の鋳造方法。The relationship between the crystallization temperature Tx and the plasticization temperature Tg is Tg
<Preparing a molten metal having an amorphous alloy composition of Tx, then pouring the molten metal into a mold, and thereafter maintaining the molten metal under pressure, and controlling the temperature at the end of the pressure to determine the progress of crystallization of the member. The amorphous alloy member is characterized by being set at a temperature lower than the crystallization temperature Tx so as to prevent it, and higher than the plasticization temperature Tg so as to avoid pressurizing the solid state member. Casting method.
温度Tg以上に設定する、第（１）項記載の非晶質合金製
部材の鋳造方法。2. The method for casting an amorphous alloy member according to claim 1, wherein said mold is preheated and its preheating temperature is set to a plasticizing temperature Tg or higher.
＜Txである非晶質合金組成の溶湯を調製し、次いで前記
溶湯を金型に注入し、その後、前記溶湯を加圧下に保持
し、その加圧終了温度を、可塑化温度Tg以下で、且つ固
体状態の部材に対する加圧を回避し得る温度に設定した
ことを特徴とする非晶質合金製部材の鋳造方法。3. The relationship between the crystallization temperature Tx and the plasticization temperature Tg is Tg.
<Preparing a melt of an amorphous alloy composition that is Tx, then injecting the melt into a mold, then holding the melt under pressure, and the pressurization end temperature, at a plasticization temperature Tg or less, A method for casting a member made of an amorphous alloy, wherein the temperature is set so as to avoid pressurization of the member in a solid state.
温度Tg以上に設定する、第（３）項記載の非晶質合金製
部材の鋳造方法。4. The method for casting an amorphous alloy member according to claim 3, wherein said mold is preheated and its preheating temperature is set to a plasticizing temperature Tg or higher.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01344176A JP3120284B2 (en) | 1989-12-29 | 1989-12-29 | Casting method for amorphous alloy members |
| US07/960,242 US5279349A (en) | 1989-12-29 | 1992-10-13 | Process for casting amorphous alloy member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01344176A JP3120284B2 (en) | 1989-12-29 | 1989-12-29 | Casting method for amorphous alloy members |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03204160A JPH03204160A (en) | 1991-09-05 |
| JP3120284B2 true JP3120284B2 (en) | 2000-12-25 |
Family
ID=18367215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01344176A Expired - Fee Related JP3120284B2 (en) | 1989-12-29 | 1989-12-29 | Casting method for amorphous alloy members |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3120284B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0617161A (en) * | 1992-06-30 | 1994-01-25 | Honda Motor Co Ltd | Production of metallic material excellent in mechanical characteristic, etc. |
| US5494541A (en) * | 1993-01-21 | 1996-02-27 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Production of aluminum alloy |
| JP3808167B2 (en) * | 1997-05-01 | 2006-08-09 | Ｙｋｋ株式会社 | Method and apparatus for manufacturing amorphous alloy molded article formed by pressure casting with mold |
| JP3919946B2 (en) * | 1998-07-08 | 2007-05-30 | 独立行政法人科学技術振興機構 | Method for producing amorphous alloy sheet excellent in bending strength and impact strength |
| DE60329094D1 (en) * | 2002-02-01 | 2009-10-15 | Liquidmetal Technologies | THERMOPLASTIC CASTING OF AMORPHOUS ALLOYS |
| US8833432B2 (en) * | 2012-09-27 | 2014-09-16 | Apple Inc. | Injection compression molding of amorphous alloys |
-
1989
- 1989-12-29 JP JP01344176A patent/JP3120284B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03204160A (en) | 1991-09-05 |
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