JP2867783B2 - Copper alloy mold for casting Al or Al alloy - Google Patents
Copper alloy mold for casting Al or Al alloyInfo
- Publication number
- JP2867783B2 JP2867783B2 JP7629692A JP7629692A JP2867783B2 JP 2867783 B2 JP2867783 B2 JP 2867783B2 JP 7629692 A JP7629692 A JP 7629692A JP 7629692 A JP7629692 A JP 7629692A JP 2867783 B2 JP2867783 B2 JP 2867783B2
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- mold
- casting
- plating
- copper
- 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
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、ＡｌまたはＡｌ合金
鋳造用銅合金金型に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copper alloy mold for casting Al or an Al alloy.
【０００２】[0002]
【従来の技術】一般に、ＡｌまたはＡｌ合金の鋳造金型
に用いられる金型材料としては、鉄系合金材料が用いら
れている。しかし、前記鉄系合金材料金型は、鉄系合金
の熱伝導性の低さから冷却速度が遅く、したがって、１
回の鋳造時間を長くとらなければならず、そのために単
位時間当たりのＡｌまたはＡｌ合金鋳造スピードを高め
ることができず、ＡｌまたはＡｌ合金鋳造スピードを高
めてコストを削減するという要求には対応できなかっ
た。さらに、鉄系合金材料金型を用いて鋳造したＡｌま
たはＡｌ合金鋳物は結晶粒が微細化せず、Ａｌ合金鋳物
の強度および延性を十分に確保できないという課題もあ
った。2. Description of the Related Art Generally, an iron-based alloy material is used as a mold material used for a casting mold of Al or an Al alloy. However, the cooling rate of the iron-based alloy material mold is low due to the low thermal conductivity of the iron-based alloy.
It is necessary to increase the casting time per cycle, which makes it impossible to increase the casting speed of Al or Al alloy per unit time. Did not. Furthermore, Al or an Al alloy casting cast using an iron-based alloy material mold has a problem that crystal grains are not refined, and the strength and ductility of the Al alloy casting cannot be sufficiently ensured.
【０００３】そこで、ＡｌまたはＡｌ合金鋳造用金型と
して、水冷または空冷の銅合金金型を用いることが考え
られるが、銅合金は一般にＡｌ溶湯と反応しやすく、Ａ
ｌまたはＡｌ合金を銅合金製金型に鋳造すると、Ａｌと
銅合金が反応し金型内面にＣｕ−Ａｌ合金層が生じて付
着し、金型寿命も短くて実用に供することができないと
いう欠点があった。Therefore, it is conceivable to use a water-cooled or air-cooled copper alloy mold as the mold for casting Al or Al alloy.
When l or Al alloy is cast into a copper alloy mold, Al and the copper alloy react with each other to form a Cu-Al alloy layer on the inner surface of the mold and adhere to the mold. was there.
【０００４】この対策としては、例えば、銅合金金型の
表面上へのセラミック溶射した銅合金金型（軽金属学
会、第８０回春期大会講演概要、Ｐ．１９５〜１９
６）、銅合金金型の表面上へＷＣを溶射した銅合金金
型、銅合金金型の表面上へ硬質Ｃｒメッキをした銅合金
金型、銅合金金型の表面上へＮｉ−５％Ｆｅ合金メッキ
をした銅合金金型、銅合金金型の表面上へＣｏ−２０％
Ｎｉ合金メッキをした銅合金金型などが提案されてい
る。[0004] As a countermeasure, for example, a copper alloy mold sprayed with ceramic on the surface of the copper alloy mold (Summary of the 80th Spring Meeting of the Japan Institute of Light Metals, pp. 195-19)
6), a copper alloy mold sprayed with WC on the surface of the copper alloy mold, a copper alloy mold hard-plated on the surface of the copper alloy mold, and Ni-5% on the surface of the copper alloy mold. Copper alloy mold plated with Fe alloy, Co-20% on the surface of copper alloy mold
A copper alloy mold plated with Ni alloy has been proposed.
【０００５】[0005]
【発明が解決しようとする課題】しかし、前記セラミッ
クおよびＷＣ溶射層は剥離しやすく、また、硬質Ｃｒメ
ッキ、Ｎｉ−５％Ｆｅ合金メッキおよびＣｏ−２０％Ｎ
ｉ合金メッキ等はＡｌ溶湯との反応性に問題があり、十
分満足のいくものではなかった。However, the ceramic and WC sprayed layers are easy to peel off, and hard Cr plating, Ni-5% Fe alloy plating and Co-20% N
The i-alloy plating and the like have a problem in reactivity with the molten aluminum, and are not sufficiently satisfactory.
【０００６】[0006]
【課題を解決するための手段】そこで、本発明者等は、
Ｃｕ合金のもつ優れた冷却能を犠牲にすることがなく、
Ａｌ溶湯と反応することがなく、さらに使用寿命の長い
ＡｌまたはＡｌ合金鋳造用銅合金金型を得るべく研究を
行った結果、銅または銅合金金型表面上にＦｅメッキを
施すと、Ａｌ溶湯との反応がなく金型寿命に優れ、この
Ｆｅメッキを施した銅または銅合金金型を用いてＡｌま
たはＡｌ合金を鋳造すると、単位時間当たりのＡｌまた
はＡｌ合金鋳造スピードを高めることができ、得られた
ＡｌまたはＡｌ合金鋳物の組織も微細化し、強度および
延性が鉄系合金材料金型で鋳造した場合に比べ１０〜２
０％程度向上し、さらに、銅または銅合金金型とＦｅメ
ッキとの間に、中間層として、ＮｉまたはＮｉ合金メッ
キを施すことにより、さらに金型寿命が向上する、など
の知見を得たのである。Means for Solving the Problems Accordingly, the present inventors have
Without sacrificing the excellent cooling ability of Cu alloy,
As a result of research to obtain a copper alloy mold for casting Al or Al alloy which does not react with the molten aluminum and has a longer service life, as a result of applying Fe plating on the copper or copper alloy mold surface, When the Al or Al alloy is cast using the copper or copper alloy mold with the Fe plating, the speed of casting the Al or Al alloy per unit time can be increased. The structure of the obtained Al or Al alloy casting is also refined, and the strength and ductility are 10 to 2 compared with the case of casting with an iron-based alloy material mold.
It has been found that the mold life is further improved by applying Ni or Ni alloy plating as an intermediate layer between the copper or copper alloy mold and the Fe plating, by about 0%. It is.
【０００７】この発明はかかる知見にもとづいてなされ
たものであって、（１） 銅または銅合金金型表面上に
０．００５ｍｍ〜３ｍｍの厚さのＦｅメッキを施てなる
ＡｌまたはＡｌ合金鋳造用銅合金金型、（２） 銅また
は銅合金金型表面上にＮｉまたはＮｉ合金メッキを施
し、さらにその上にＦｅメッキを施してなる２層メッキ
を施した銅合金金型であって、前記２層メッキの合計メ
ッキ厚が０．００５ｍｍ〜３ｍｍの範囲内にあるＡｌま
たはＡｌ合金鋳造用銅合金金型、に特徴を有するもので
ある。The present invention has been made based on such findings, and (1) Al or Al alloy casting in which a copper or copper alloy mold surface is plated with Fe having a thickness of 0.005 mm to 3 mm. (2) A copper alloy mold in which a copper or copper alloy mold surface is subjected to Ni or Ni alloy plating, and further subjected to Fe plating on the copper or copper alloy mold surface to form a two-layer plating, A copper alloy mold for casting Al or an Al alloy having a total plating thickness of the two-layer plating in a range of 0.005 mm to 3 mm.
【０００８】次に、この発明におけるメッキを上記の通
り限定した理由を説明する。 （ａ）Ｆｅメッキ Ｆｅメッキは、Ａｌ溶湯との反応性が極めて少なく、銅
または銅合金金型寿命を向上させるが、その厚さが０．
００５ｍｍ未満だと、Ａｌ溶湯流により短期間に摩耗し
かつ剥離しやすく、一方、その厚さが３ｍｍを越える
と、冷却能が低下し、鋳造したＡｌ鋳物の特性が、鉄金
型に比べて向上しなくなる。したがって、Ｆｅメッキの
厚さは、０．００５ｍｍ〜３ｍｍとした。Next, the reason why the plating in the present invention is limited as described above will be described. (A) Fe plating Fe plating has extremely low reactivity with molten aluminum and improves the life of a copper or copper alloy mold.
If it is less than 005 mm, it will be worn and peeled off in a short time due to the flow of the molten aluminum, while if its thickness exceeds 3 mm, the cooling capacity will be reduced and the characteristics of the cast Al casting will be lower than that of the iron mold. Will not improve. Therefore, the thickness of the Fe plating is set to 0.005 mm to 3 mm.
【０００９】（ｂ）２層メッキ 銅または銅合金金型表面とＦｅメッキとの間に、Ｎｉま
たはＮｉ合金メッキを施すと、Ｆｅメッキ層の密着性が
向上し、金型寿命が向上するが、２層メッキの合計厚さ
が０．００５ｍｍ以下だと摩耗および剥離しやすく、ま
た、２層合計で３ｍｍを越えると冷却能が低下し、Ａｌ
鋳物の特性が鉄系合金材料金型に比べて、向上しなくな
るので好ましくない。したがって、２層メッキの合計厚
さを０．００５ｍｍ〜３ｍｍとした。(B) Two-layer plating When Ni or Ni alloy plating is applied between the copper or copper alloy mold surface and the Fe plating, the adhesion of the Fe plating layer is improved and the life of the mold is improved. If the total thickness of the two-layer plating is 0.005 mm or less, it is easy to wear and peel off.
It is not preferable because the characteristics of the casting are not improved as compared with the iron-based alloy material mold. Therefore, the total thickness of the two-layer plating is set to 0.005 mm to 3 mm.
【００１０】[0010]
【実施例】次に、この発明を実施例にもとづいて、具体
的に説明する。純ＣｕまたはＣｕ−０．６％Ｃｒ−０．
１％Ｚｒからなる組成の耐熱Ｃｕ合金を使用し、直径：
５０ｍｍ、深さ：５０ｍｍの大空間およびその大空間の
下方に続く直径：２０ｍｍ、深さ：５０ｍｍの小空間か
らなるキャビティを有し、外部寸法が高さ：１５０ｍ
ｍ、幅：１００ｍｍ、厚さ：１００ｍｍを有する二つ割
り金型を機械加工にて作製し、次いで、これら金型キャ
ビティの内面に、表１および表２に示す、Ｆｅメッキま
たは下地メッキおよびＦｅメッキの２層メッキからなる
表面処理層を形成し、本発明金型１〜９および比較金型
１〜３（表２において、＊印を付けた値はこの発明の範
囲外の値を示す）を作製した。Next, the present invention will be specifically described based on embodiments. Pure Cu or Cu-0.6% Cr-0.
Using a heat-resistant Cu alloy having a composition of 1% Zr, the diameter:
It has a cavity consisting of a large space of 50 mm, depth: 50 mm and a small space below the large space with a diameter of 20 mm and a depth of 50 mm, and the external dimensions are 150 m in height.
m, a width: 100 mm, and a thickness: 100 mm. A split mold having a thickness of 100 mm was formed by machining, and then the inner surfaces of these mold cavities were subjected to Fe plating or base plating and Fe plating as shown in Tables 1 and 2. Forming a surface treatment layer composed of two-layer plating to produce molds 1 to 9 of the present invention and comparative molds 1 to 3 (in Table 2, values marked with * indicate values outside the range of the present invention). did.
【００１１】さらに比較のため、前記Ｃｕ−０．６％Ｃ
ｒ−０．１％Ｚｒからなる組成の耐熱Ｃｕ合金金型の内
面に、表２に示す、セラミック溶射、ＷＣ溶射、硬質Ｃ
ｒメッキ、Ｎｉ−５％Ｆｅ合金メッキ、Ｃｏ−２０％Ｎ
ｉ合金メッキなどの表面処理層を施した従来金型１〜５
を用意し、さらに、これとは別に、銅合金金型と同形状
のＦｅ合金金型の従来金型６を用意した。For comparison, the Cu-0.6% C
As shown in Table 2, ceramic spraying, WC spraying, and hard C were performed on the inner surface of a heat-resistant Cu alloy mold having a composition of r-0.1% Zr.
r plating, Ni-5% Fe alloy plating, Co-20% N
Conventional molds 1 to 5 with surface treatment layer such as i-alloy plating
Was prepared, and separately, a conventional die 6 of an Fe alloy die having the same shape as the copper alloy die was prepared.
【００１２】[0012]
【表１】 [Table 1]
【００１３】[0013]
【表２】 [Table 2]
【００１４】上記表１および表２に示した金型を用い、 鋳込材 ：Ａｌ合金（ＡＣ４Ｃ）、 鋳込温度：７００℃、 鋳造回数：最高３００回、 の条件で鋳造試験を行ない、鋳造後の鋳型内面のＡｌ合
金溶湯との反応の状況および表面処理層の剥離の状況を
調べた。表面処理層の剥離については、目視にて剥離の
有無を観察し、剥離が発生する鋳造回数で評価した。剥
離が発生した場合は、以後の鋳造試験は行なわなかっ
た。Using the molds shown in Tables 1 and 2, a casting test was performed under the following conditions: casting material: Al alloy (AC4C); casting temperature: 700 ° C .; The state of the subsequent reaction with the molten Al alloy on the inner surface of the mold and the state of peeling of the surface treatment layer were examined. Regarding peeling of the surface treatment layer, the presence or absence of peeling was visually observed, and the number of castings at which peeling occurred was evaluated. When peeling occurred, the subsequent casting test was not performed.
【００１５】Ａｌ合金溶湯との反応については、剥離が
発生した時点または、剥離が発生しない場合は３００回
鋳造時点でのＡｌ合金の金型への付着状況を目視にて調
べ、ほとんど付着していないものは○印、わずかに付着
しているものは△印、付着量が多い場合は×印を付して
示した。さらに、上記金型を用いて鋳造した上記被鋳造
物（アルミニウム合金鋳物）の引張試験を行ない、引張
強度、伸びを測定し、これらの結果を表３および表４に
示した。Regarding the reaction with the molten Al alloy, when the peeling occurs, or when the peeling does not occur, the adhesion state of the Al alloy to the mold at the time of casting 300 times is visually inspected, and almost no adhesion occurs. Those that did not exist were marked with a circle, those that slightly adhered were marked with a triangle, and those that had a large amount of adhesion were marked with a cross. Further, a tensile test was performed on the casting (aluminum alloy casting) cast using the mold, and tensile strength and elongation were measured. The results are shown in Tables 3 and 4.
【００１６】[0016]
【表３】 [Table 3]
【００１７】[0017]
【表４】 [Table 4]
【００１８】[0018]
【発明の効果】表１〜表４に示される結果から、本発明
金型１〜９を用いて鋳造したＡｌ合金鋳物は、従来金型
１（セラミック溶射金型）、従来金型２（ＷＣ溶射金
型）および従来金型６（従来のＦｅ合金金型）用いて鋳
造したＡｌ合金鋳物に比べて強度および伸びが優れてお
り、また、本発明金型１〜９は、従来金型３（硬質Ｃｒ
メッキ金型）、従来金型４（Ni−5 ％Fe合金単層メッキ
金型）および従来金型５（Cr−20％Ni合金単層メッキ金
型）に比べ、Ａｌ合金溶湯との反応性が低いことがわか
る。According to the results shown in Tables 1 to 4, the Al alloy castings cast using the molds 1 to 9 of the present invention are the same as those of the conventional mold 1 (ceramic sprayed mold) and the conventional mold 2 (WC It is superior in strength and elongation as compared with an Al alloy casting cast using a thermal spray mold) and a conventional mold 6 (conventional Fe alloy mold). (Hard Cr
Compared with conventional mold 4 (Ni-5% Fe alloy single-layer plating mold) and conventional mold 5 (Cr-20% Ni alloy single-layer plating mold), reactivity with molten Al alloy Is low.
【００１９】このように、この発明のＡｌ合金鋳造用金
型は、従来のＦｅ金型よりも優れた機械的特性を有する
Ａｌ合金鋳物が得られ、また、従来のセラミック溶射、
硬質Ｃｒメッキ等に比べ、剥離の発生、あるいは、Ａｌ
との反応性も少ないので、耐久性が優れるとともに、冷
却速度が速いため、１回の鋳造時間が短くすることがで
きて生産性が向上し、Ａｌ合金鋳物の製造コストを低減
でき、もって産業の発展に大いに貢献しうるものであ
る。As described above, according to the Al alloy casting mold of the present invention, an Al alloy casting having mechanical properties superior to the conventional Fe mold can be obtained.
The occurrence of peeling or Al
With less reactivity, the durability is excellent, and the cooling rate is high, so that one casting time can be shortened and the productivity is improved, and the production cost of the Al alloy casting can be reduced. Can greatly contribute to the development of
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小林 正男 埼玉県大宮市北袋町１−297 三菱マテ リアル株式会社 中央研究所内 (72)発明者 岩村 卓郎 埼玉県大宮市北袋町１−297 三菱マテ リアル株式会社 中央研究所内 (72)発明者 中山 宏明 埼玉県桶川市上日出谷1230 三菱マテリ アル株式会社 桶川第一製作所内 (58)調査した分野(Int.Cl.6，ＤＢ名) B22C 9/06 B22D 17/22 B22D 21/04 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masao Kobayashi 1-297 Kitabukurocho, Omiya City, Saitama Prefecture Mitsubishi Materials Corporation Central Research Laboratory (72) Inventor Takuo Iwamura 1-297 Kitabukurocho, Omiya City, Saitama Mitsubishi Materials Real Central Research Laboratory Co., Ltd. (72) Inventor Hiroaki Nakayama 1230 Kamideya, Okegawa-shi, Saitama Mitsubishi Materials Corporation Okegawa Daiichi Mfg. Co., Ltd. (58) Fields investigated (Int. Cl. 6 , DB name) B22C 9/06 B22D 17/22 B22D 21/04
Claims (2)
０．００５ｍｍ〜３ｍｍのＦｅメッキを施てなることを
特徴とするＡｌまたはＡｌ合金鋳造用銅合金金型。Claims 1. A copper or copper alloy mold surface having a thickness:
A copper alloy mold for casting Al or an Al alloy, which is plated with Fe of 0.005 mm to 3 mm.
Ｎｉ合金メッキを施し、さらにその上にＦｅメッキを施
してなる２層メッキを施した銅合金金型であって、前記
２層メッキの合計厚さが０．００５ｍｍ〜３ｍｍの範囲
内にあることを特徴とするＡｌまたはＡｌ合金鋳造用銅
合金金型。2. A copper alloy mold in which Ni or Ni alloy plating is applied on a surface of a copper or copper alloy mold, and further, Fe plating is applied thereon to provide a two-layer plating. Characterized in that the total thickness is in the range of 0.005 mm to 3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7629692A JP2867783B2 (en) | 1992-02-27 | 1992-02-27 | Copper alloy mold for casting Al or Al alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7629692A JP2867783B2 (en) | 1992-02-27 | 1992-02-27 | Copper alloy mold for casting Al or Al alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05237593A JPH05237593A (en) | 1993-09-17 |
| JP2867783B2 true JP2867783B2 (en) | 1999-03-10 |
Family
ID=13601398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7629692A Expired - Fee Related JP2867783B2 (en) | 1992-02-27 | 1992-02-27 | Copper alloy mold for casting Al or Al alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2867783B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0774525B1 (en) * | 1995-11-17 | 2000-02-23 | Ngk Insulators, Ltd. | Copper alloy mold for casting aluminium or aluminium alloy |
-
1992
- 1992-02-27 JP JP7629692A patent/JP2867783B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05237593A (en) | 1993-09-17 |
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