JPH05354A - Die for casting metal - Google Patents
Die for casting metalInfo
- Publication number
- JPH05354A JPH05354A JP17768591A JP17768591A JPH05354A JP H05354 A JPH05354 A JP H05354A JP 17768591 A JP17768591 A JP 17768591A JP 17768591 A JP17768591 A JP 17768591A JP H05354 A JPH05354 A JP H05354A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- weight
- die
- metal
- molten metal
- 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.)
- Withdrawn
Links
Landscapes
- Mold Materials And Core Materials (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はアルミニウム，銅，マグ
ネシウム，亜鉛，鉄等の金属成形用鋳型に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting mold for metal such as aluminum, copper, magnesium, zinc, iron.
【０００２】[0002]
【従来の技術】金属成形用鋳型として使われる材質に、
従来熱間加工用方鋼ＳＫＤ６１またはＳＫＤ６があり、
これらに熱処理および表面処理を施し、成形時の熱応力
により発生するヒートチェック（割れ）対策を行なって
使っている。2. Description of the Related Art Materials used as metal molds are
There is conventional hot working steel SKD61 or SKD6,
These are heat-treated and surface-treated to prevent heat check (cracking) caused by thermal stress during molding.
【０００３】また、特開昭５７−９１８３９号公報に
は、高い温度伝導率を有することで鋳型表面のヒートチ
ェック（割れ）の問題を取り除き、鋳型寿命が向上する
ように、低合金鋼合金から作られた耐久鋳型がある。Further, in Japanese Patent Laid-Open No. 57-91839, a low alloy steel alloy is used to improve the mold life by eliminating the problem of heat check (cracking) on the mold surface due to its high thermal conductivity. There is a durable mold made.
【０００４】[0004]
【発明が解決しようとする課題】しかし、アルミダイカ
スト本来のアルミニウムの鋳型への焼付性は、溶融した
アルミニウムと鋳型とは化学的に親和性があって溶損が
生じるので従来と変わらず、またヒートチェック性にお
いても完全には対策されていない。また、低合金鋼合金
も同様な現象が生じている。However, the original seizure property of aluminum die casting on a mold is the same as before because the molten aluminum and the mold have chemical affinity with each other and melting loss occurs. The heat checkability is not completely taken. The same phenomenon occurs in low alloy steel alloys.
【０００５】よって本発明の金属成形用鋳型は前記従来
の問題点に鑑みて開発されたもので、金属成型、特にア
ルミダイカスト成形において高温下における耐焼付性に
優れているため、アルミ合金の鋳型表面への焼付がな
い。また熱応力による鋳型面のヒートチェックの発生も
なく、長期にわたって離型性および耐久性の良い金属成
形用鋳型の提供を目的とする。Therefore, the metal forming mold of the present invention was developed in view of the above-mentioned conventional problems, and since it has excellent seizure resistance at high temperature in metal forming, particularly aluminum die casting, it is an aluminum alloy mold. There is no seizure on the surface. Another object of the present invention is to provide a mold for metal forming which has good mold releasability and durability for a long period of time without heat check of the mold surface due to thermal stress.
【０００６】[0006]
【課題を解決するための手段および作用】前記問題点を
解決するために本発明はタングステン８５〜９８重量
％，ニッケル２〜５重量％，モリブデン２〜５重量％お
よび鉄１〜５重量％のタングステン系金属焼結体により
型基材を形成するとともに、この基材の少なくとも溶融
金属が接触する面にタングステンまたはモリブブンの酸
化物による層を形成して金属成形用鋳型を構成したこと
を特徴としたものである。SUMMARY OF THE INVENTION In order to solve the above problems, the present invention comprises 85 to 98% by weight of tungsten, 2 to 5% by weight of nickel, 2 to 5% by weight of molybdenum and 1 to 5% by weight of iron. A mold base is formed from a tungsten-based metal sintered body, and a metal-forming mold is formed by forming a layer of tungsten or molybdenum oxide on at least a surface of the base that contacts the molten metal. It was done.
【０００７】前記本発明の金属成形用鋳型において、そ
の基材の組成であるタングステン（Ｗ），モリブデン
（Ｍｏ）の両金属は共に融点が高く（Ｗ：３３８０℃，
Ｍｏ：２６２０℃）かつ揮発しにくい材料である。また
本発明では、型基材の少なくとも溶融金属が接触するキ
ャビティ面にはＷ−０またはＭｏ−０の緻密でかつ耐酸
性，耐蝕性に優れた安定な酸化物の層が形成されてお
り、その面と溶融したアルミ合金が接触しても化学反応
を起こすことがないめた、キャビティ面とアルミ合金と
の間に焼付きが生じない。さらに、Ｍｏ−Ｆｅの結合に
より、酸化物層の結晶粒の肥大を抑制できるので６００
℃以上の高温時でも結晶構造に変化がなく、酸化物の層
は機械的強度の低下のない強靱性を維持することができ
る。In the metal forming mold of the present invention, both metals (tungsten (W) and molybdenum (Mo)), which are the composition of the base material, have high melting points (W: 3380 ° C.,
(Mo: 2620 ° C.) and is a material that does not easily volatilize. Further, in the present invention, a stable oxide layer of W-0 or Mo-0 which is dense and has excellent acid resistance and corrosion resistance is formed on at least the cavity surface of the mold base material which is in contact with the molten metal, Even if the surface and the molten aluminum alloy come into contact with each other, a chemical reaction does not occur, and seizure does not occur between the cavity surface and the aluminum alloy. Further, since the Mo—Fe bond can suppress the enlargement of the crystal grains of the oxide layer,
The crystal structure does not change even at a high temperature of 0 ° C. or higher, and the oxide layer can maintain the toughness without a decrease in mechanical strength.
【０００８】なお、前記金属成形用鋳型基材の各金属成
分組成の重量％を前記の範囲とした理由は、タングステ
ン８５〜９８重量％の場合、８５重量％未満であると硬
度や耐酸化性を保持するために十分でなく、９８重量％
を越えると硬過ぎて脆くなるため加工性が悪くなる。The reason why the weight% of each metal component composition of the metal molding template base material is within the above range is that when the content of tungsten is 85 to 98% by weight, the hardness and the oxidation resistance are less than 85% by weight. Not enough to hold 98% by weight
If it exceeds, the workability becomes poor because it becomes too hard and brittle.
【０００９】ニッケル２〜５重量％の場合、２重量％未
満であるとタングステンとモリブデンの酸化を拡大さ
せ、５重量％を越えると硬度を低下させる。モリブデン
２〜５重量％の場合、２重量％であるとタングステンと
モリブデンの最適な酸化分布が得られず、５重量％を越
えると脆性を助長させる。また鉄１〜５重量％の場合、
１重量％未満であるとモリブデンと鉄の結合が得られず
強靱性を低下させ、５重量％を越えるとモリブデンとの
結合作用を満足しない鉄がＦe2Ｏ3 を形成して耐酸化性
を低下させるという不具合が生じるからである。In the case of 2 to 5% by weight of nickel, if the amount is less than 2% by weight, the oxidation of tungsten and molybdenum is expanded, and if it exceeds 5% by weight, the hardness is lowered. In the case of 2 to 5% by weight of molybdenum, the optimum oxidation distribution of tungsten and molybdenum cannot be obtained at 2% by weight, and brittleness is promoted at more than 5% by weight. If the iron content is 1 to 5% by weight,
If it is less than 1% by weight, the bond between molybdenum and iron cannot be obtained and the toughness is deteriorated, and if it exceeds 5% by weight, iron which does not satisfy the bonding action with molybdenum forms Fe 2 O 3 to improve oxidation resistance. This is because there is a problem that it lowers.
【００１０】なお本発明の金属成形用鋳型はアルミダイ
カストの場合について述べているがアルミニウムの他
に、銅，マグネシウム，亜鉛，鉄等の金属成形用にも使
用できる。The metal forming mold of the present invention has been described for the case of aluminum die casting, but it can be used for forming metal such as copper, magnesium, zinc, iron, etc. in addition to aluminum.
【００１１】[0011]
【実施例】以下本発明の実施例を図面とともに説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【００１２】[0012]
【実施例１】図１および図２は本発明の金属成形用鋳型
の実施例１を示し、図１は金属成形用鋳型の概略断面
図、図２は同鋳型のＡ部拡大詳細断面図である。Embodiment 1 FIGS. 1 and 2 show Embodiment 1 of a metal forming mold of the present invention. FIG. 1 is a schematic sectional view of the metal forming mold, and FIG. 2 is an enlarged detailed sectional view of a portion A of the same mold. is there.
【００１３】図１，２において鋳型１０は固定型１，可
動型２，コアピン３にて構成し、前記構成部材によりキ
ャビティ４および湯道５が形成されている。前記鋳型１
０の基材はその組成がＷ：９０重量％，Ｎｉ：４重量
％，Ｍｏ：４重量％およびＦｅ：２重量％であるＷ系金
属焼結体により形成され、溶融金属８が接触するキャビ
ティ面６にはＷ酸化物による層７が形成されている。In FIGS. 1 and 2, a mold 10 is composed of a fixed mold 1, a movable mold 2, and a core pin 3, and a cavity 4 and a runner 5 are formed by the constituent members. The mold 1
The base material of No. 0 is formed by a W-based metal sintered body whose composition is W: 90% by weight, Ni: 4% by weight, Mo: 4% by weight and Fe: 2% by weight, and is a cavity with which the molten metal 8 contacts. A layer 7 of W oxide is formed on the surface 6.
【００１４】前記構成の鋳型１０を用いてダイガストを
行なう場合、溶融金属８は湯道５を通り、キャビティ４
に充填され冷却固化された後、鋳型より取り出されるの
であるが、鋳型１０のキャビティ面６にはタングステン
酸化物の層７が形成されているため、溶融金属８が接触
しても溶融金属８とキャビティ面との間にヌレ性がな
く、キャビティ面６に溶融金属８が全く焼付かない。従
って離型性が良くキャビティ面６における熱応力による
ヒートチェックの発生も全くなかった。When die casting is performed using the mold 10 having the above-described structure, the molten metal 8 passes through the runner 5 and the cavity 4
It is taken out from the mold after it has been filled in and cooled and solidified. However, since the tungsten oxide layer 7 is formed on the cavity surface 6 of the mold 10, even if the molten metal 8 comes into contact with the molten metal 8, There is no wetting property with the cavity surface, and the molten metal 8 does not seize on the cavity surface 6 at all. Therefore, the mold releasability was good and no heat check was caused by the thermal stress on the cavity surface 6.
【００１５】さらに、１万ショットの連続成形を行なっ
ても成形品に何ら欠陥が見られず良好な成形品が得られ
た。これに対し、従来の金属成形用鋳型では１０００シ
ョット〜２０００ショットでキャビティ面に焼付および
微小なヒートチェックが発生し、鋳型の補修が必要とな
っていた。Furthermore, no defects were found in the molded product even after continuous molding for 10,000 shots, and a good molded product was obtained. On the other hand, in the conventional metal forming mold, seizure and minute heat check occurred on the cavity surface in 1000 to 2000 shots, and the mold had to be repaired.
【００１６】[0016]
【実施例２】本実施例においては、金属成形用鋳型１０
の基材組成がＷ：９３重量％，Ｎｉ：３重量％，Ｍｏ：
３重量％およびＦｅ：１重量％のＷ系金属焼結体により
成り、その他は実施例１と同様に構成したものである。[Embodiment 2] In this embodiment, a metal forming mold 10 is used.
The base material composition of W: 93% by weight, Ni: 3% by weight, Mo:
3% by weight and Fe: 1% by weight of a W-based metal sintered body, and the others were configured in the same manner as in Example 1.
【００１７】前記構成から成る鋳型１０のキャビティ面
６にはＭｏ酸化物による層７が形成されている。本実施
例の鋳型１０を用いてダイカストを行なった場合の結果
は実施例１と同様であり、従来の金属成形用鋳型と比べ
て溶融金属のキャビティ面６への焼付およびキャビティ
面６におけるヒートチェックの発生の問題は著しく改善
された。A layer 7 made of Mo oxide is formed on the cavity surface 6 of the mold 10 having the above structure. The results when die casting was performed using the mold 10 of this example were the same as those of Example 1, and compared with the conventional metal forming mold, seizure of molten metal on the cavity surface 6 and heat check on the cavity surface 6 were performed. The problem of occurrence of is significantly improved.
【００１８】[0018]
【発明の効果】以上説明したように、本発明の金属成形
用鋳型によれば高温下における耐酸化性，耐蝕性に優
れ、溶融金属の焼付がなく、熱応力によるキャビティ面
のヒートチェックの発生なく、離型性がよいので、長期
にわたって良好な成形品を得ることができる。As described above, according to the metal forming mold of the present invention, it is excellent in oxidation resistance and corrosion resistance at high temperature, does not cause molten metal seizure, and causes heat check of the cavity surface due to thermal stress. In addition, since the mold releasability is good, a good molded product can be obtained for a long period of time.
【図１】本発明の金属成形用鋳型の概略断面図である。FIG. 1 is a schematic cross-sectional view of a metal forming mold of the present invention.
【図２】同鋳型のＡ部拡大詳細断面図である。FIG. 2 is an enlarged detailed sectional view of an A part of the mold.
１ 固定型 ２ 可動型 ３ コアピン ４ キャビティ ５ 湯道 ６ キャビティ面 ７ 層 ８ 溶融金属 １０ 鋳型 1 Fixed type 2 Movable type 3 Core pin 4 Cavity 5 Runner 6 Cavity surface 7 Layer 8 Molten metal 10 Mold
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ２２Ｄ 17/22 Ｑ 8926−4Ｅ Ｃ２２Ｃ 1/04 Ｄ 7412−4Ｋ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI Technical display location B22D 17/22 Q 8926-4E C22C 1/04 D 7412-4K
Claims (1)
ル２〜５重量％，モリブデン２〜５重量％および鉄１〜
５重量％のタングステン系金属焼結体により方基材を構
成するとともに、この基材の少なくとも溶融金属が接触
する面にタングステンまたはモリブデンの酸化物による
層を形成したことを特徴とする金属成形用鋳型。Claims: 1. 85% to 98% by weight of tungsten, 2% to 5% by weight of nickel, 2% to 5% by weight of molybdenum, and 1% of iron.
A metal forming mold comprising a rectangular base material made of 5% by weight of a tungsten-based metal sintered body, and a layer made of an oxide of tungsten or molybdenum formed on at least a surface of the base material which is in contact with a molten metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17768591A JPH05354A (en) | 1991-06-21 | 1991-06-21 | Die for casting metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17768591A JPH05354A (en) | 1991-06-21 | 1991-06-21 | Die for casting metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05354A true JPH05354A (en) | 1993-01-08 |
Family
ID=16035316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17768591A Withdrawn JPH05354A (en) | 1991-06-21 | 1991-06-21 | Die for casting metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05354A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000010752A1 (en) * | 1998-08-25 | 2000-03-02 | Ges. Für Wolfram Industrie Mbh | Casting tool for casting shapes from non-ferrous metals |
| EP1382699A1 (en) * | 2002-07-13 | 2004-01-21 | Poongsan Corporation | A heavy Tungsten alloy for penetrating splinter shell and forming method thereof |
| JP2014117712A (en) * | 2012-12-13 | 2014-06-30 | Kawasaki Heavy Ind Ltd | Casting mold |
-
1991
- 1991-06-21 JP JP17768591A patent/JPH05354A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000010752A1 (en) * | 1998-08-25 | 2000-03-02 | Ges. Für Wolfram Industrie Mbh | Casting tool for casting shapes from non-ferrous metals |
| EP1382699A1 (en) * | 2002-07-13 | 2004-01-21 | Poongsan Corporation | A heavy Tungsten alloy for penetrating splinter shell and forming method thereof |
| JP2014117712A (en) * | 2012-12-13 | 2014-06-30 | Kawasaki Heavy Ind Ltd | Casting mold |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19980903 |