JP2001096336A - Mold for casting, method of casting magnesium alloys and its casting - Google Patents
Mold for casting, method of casting magnesium alloys and its castingInfo
- Publication number
- JP2001096336A JP2001096336A JP27221799A JP27221799A JP2001096336A JP 2001096336 A JP2001096336 A JP 2001096336A JP 27221799 A JP27221799 A JP 27221799A JP 27221799 A JP27221799 A JP 27221799A JP 2001096336 A JP2001096336 A JP 2001096336A
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- Prior art keywords
- casting
- mold
- magnesium alloy
- cavity
- seizure resistance
- Prior art date
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は鋳造用金型、マグネ
シウム合金の鋳造法及び鋳造品に関し、より詳しくは、
本発明はマグネシウム合金、亜鉛合金、アルミニウム合
金、銅合金等の鋳造に用いるのに適した鋳造用金型、特
に自動車部品や家電製品部品等について軽量化、リサイ
クル可能化に適しているマグネシウム合金の鋳造に用い
るのに適した鋳造用金型、マグネシウム合金の鋳造法及
び鋳造品に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting mold, a method of casting a magnesium alloy, and a cast product.
The present invention relates to a casting mold suitable for use in casting magnesium alloys, zinc alloys, aluminum alloys, copper alloys, etc., and particularly to magnesium alloys suitable for weight reduction and recyclability of automobile parts and home appliance parts. The present invention relates to a casting mold suitable for use in casting, a method for casting a magnesium alloy, and a cast product.
【０００２】[0002]
【従来の技術】自動車業界においては燃費向上のための
軽量化の必要性、家電製品等においては携帯性向上のた
めの軽量化の必要性から軽量材料のニーズが高まり、樹
脂材料や軽量金属材料が用いられてきている。しかし、
樹脂材料は一般的にリサイクルが困難であるため地球環
境保全の点で問題があるのに対して、金属材料は一般的
にリサイクルが容易であるため、家電製品の筐体、特
に、携帯用製品、例えばノート型パーソナルコンピュー
タ、プロジェクター、携帯電話、デジタルビデオカメ
ラ、ＭＤウオークマン、カメラ等の携帯商品の筐体、自
動車の各種ケース部品等の製造材料が樹脂材料からマグ
ネシウム系材料、アルミニウム系材料等の軽量金属へと
変わり、特に軽薄短小のトレンドの中で、金属としての
剛性を有しながら実用軽量金属中最も密度の小さい軽量
マグネシウム系材料の採用が相次いでいる。2. Description of the Related Art In the automotive industry, there is a need for lightweight materials for improving fuel efficiency, and for home electric appliances and the like, there is a need for lightweight materials for improving portability. Has been used. But,
Resin materials are generally difficult to recycle and pose a problem in terms of global environmental protection, whereas metal materials are generally easy to recycle, making housing for home appliances, especially portable products For example, the production materials for portable products such as notebook personal computers, projectors, mobile phones, digital video cameras, MD walkmans, cameras, and various case parts for automobiles are made from resin materials to magnesium-based materials and aluminum-based materials. In light of the trend toward light metals, especially in the light and thin trend, the use of lightweight magnesium-based materials, which have the lowest density among practical light metals, while having rigidity as a metal, has been successively increasing.
【０００３】マグネシウム合金の加工法としてはダイカ
スト鋳造法、低圧鋳造法、重力鋳造法、チキソモールデ
ィング等の金属射出成形法等の金型鋳造法が一般的であ
る。これらの金型鋳造法では金型焼付きを抑制して離型
性を確保するため各種離型剤が使用されている。As a processing method of a magnesium alloy, a die casting method such as a metal injection molding method such as a die casting method, a low pressure casting method, a gravity casting method, and a thixo molding method is generally used. In these mold casting methods, various mold release agents are used to suppress mold seizure and secure mold releasability.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、鋳造を
繰り返すにつれて金型のキャビティ側表面に僅かずつ溶
損、摩耗が進行して焼付きが生じ易くなり、これが金型
鋳造法の生産性を大きく下げているのが現状である。特
に、ダイカスト鋳造法、チキソモールディング等の金属
射出成形法による家電製品の筐体、特に、ノート型パー
ソナルコンピュータ、プロジェクター、携帯電話、デジ
タルビデオカメラ、ＭＤウオークマン、カメラ等の携帯
用製品の筐体の薄肉部品の製造においては、金型への充
填性の確保のために高い射出圧力、高い射出速度、高い
金型温度、高い溶湯温度で鋳造することになり、このよ
うな条件下での鋳造においては特に金型への焼付きが問
題となっている。However, as the casting is repeated, erosion and abrasion of the cavity side surface of the mold gradually progress, and seizure tends to occur, which greatly reduces the productivity of the mold casting method. That is the current situation. In particular, housings of home appliances by metal injection molding methods such as die casting and thixo molding, especially housings of portable products such as notebook personal computers, projectors, mobile phones, digital video cameras, MD walkmans and cameras. In the production of thin-walled parts, casting must be performed at high injection pressure, high injection speed, high mold temperature, and high melt temperature in order to ensure the filling of the mold. Is particularly problematic in seizure on a mold.
【０００５】また、高温及び室温でのクリープ特性を改
善するためにカルシウム、希土類金属、ケイ素を含有す
る合金のように、金型焼付きを生じやすい合金の鋳造に
おいても金型への焼付きが問題になる。更に、亜鉛合
金、アルミニウム合金、銅合金等の鋳造においても金型
への焼付きが問題になる。[0005] In addition, in order to improve creep characteristics at high temperatures and room temperatures, seizure to the mold is not caused even in casting of an alloy which easily causes seizure of the mold, such as an alloy containing calcium, rare earth metal and silicon. It becomes a problem. Furthermore, seizure to a metal mold becomes a problem in casting of a zinc alloy, an aluminum alloy, a copper alloy or the like.
【０００６】本発明はこのような従来技術の有する課題
に鑑みてなされたものであり、本発明はマグネシウム合
金、亜鉛合金、アルミニウム合金、銅合金等の鋳造に用
いるのに適しており且つ耐焼付き性に優れている鋳造用
金型、特に自動車部品や家電製品部品等について軽量
化、リサイクル可能化に適しているマグネシウム合金の
鋳造に用いるのに適しており且つ耐焼付き性に優れてい
る鋳造用金型、より安価で高品質なマグネシウム合金鋳
造品の鋳造法及び鋳造品を提供することを課題にしてい
る。The present invention has been made in view of the above-mentioned problems of the prior art, and the present invention is suitable for use in casting magnesium alloys, zinc alloys, aluminum alloys, copper alloys, and the like, and is resistant to seizure. Casting molds with excellent heat resistance, especially those suitable for use in casting magnesium alloys that are suitable for weight reduction and recyclability of automobile parts and home appliance parts, and have excellent seizure resistance It is an object of the present invention to provide a casting method and a casting of a metal mold, a less expensive and high quality magnesium alloy casting.
【０００７】[0007]
【課題を解決するための手段】本発明者等は上記の課題
を達成するために種々検討を重ねた結果、金型への焼付
きは、金型材である鉄と高速、高圧で流動するマグネシ
ウム合金、亜鉛合金、アルミニウム合金、銅合金等の溶
湯との間で金属間化合物を生成する化学反応であり、金
型及び溶湯の双方の温度、溶湯が金型に衝突する際の速
度及び圧力、溶湯中の成分と鉄との化学的親和力等の因
子により焼付き性が決まることを知見した。The present inventors have made various studies to achieve the above object, and as a result, the seizure to the mold is caused by the fact that iron which is a mold material and magnesium which flows at high speed and high pressure are used. Alloy, zinc alloy, aluminum alloy, a chemical reaction that produces an intermetallic compound with a molten metal such as a copper alloy, the temperature of both the mold and the molten metal, the speed and pressure when the molten metal collides with the mold, It has been found that seizure is determined by factors such as the chemical affinity between the components in the molten metal and iron.
【０００８】しかしながら、これらの鋳造条件因子につ
いては出来るだけ広い範囲を確保することが望ましく、
また現実の鋳造においては、上記したように、金型焼付
きが一層生じ易い方向に技術が進行している。そこで本
発明者等は金型材の鉄と溶湯との接触そのものを避ける
こと、特に焼付きが生じ易いゲート部直後の領域での金
型材の鉄と溶湯との接触そのものを避けることが重要で
あると考えた。そのような接触を避けるためには、金型
のキャビティ側表面の少なくとも一部に事前に鉄以外の
溶湯との反応がゆるやかな材料からなる層を設けておく
ことが有効であることを見出し、本発明を完成した。However, it is desirable to secure as wide a range of these casting condition factors as possible.
Further, in actual casting, as described above, technology is proceeding in a direction in which mold seizure is more likely to occur. Therefore, it is important for the present inventors to avoid the contact between the iron of the mold material and the molten metal itself, and particularly to avoid the contact between the iron of the mold material and the molten metal in a region immediately after the gate portion where seizure easily occurs. I thought. In order to avoid such contact, it has been found that it is effective to provide a layer made of a material that slowly reacts with the molten metal other than iron in advance on at least a part of the cavity side surface of the mold, The present invention has been completed.
【０００９】即ち、本発明の耐焼付き性に優れた鋳造用
金型は、金型のキャビティ側表面の少なくとも一部に、
高融点金属及びセラミックスからなる群より選ばれる少
なくとも１種を含むコーティング層が設けられているこ
とを特徴とする。That is, the casting mold of the present invention having excellent seizure resistance is provided on at least a part of the cavity side surface of the mold.
A coating layer containing at least one selected from the group consisting of high melting point metals and ceramics is provided.
【００１０】また、本発明の耐焼付き性に優れた鋳造用
金型は、高融点金属、セラミックス及び黒鉛からなる群
より選ばれる少なくとも１種を添加剤として含む離型剤
を金型のキャビティ側表面の少なくとも一部に塗布し、
加熱処理することにより形成されたコーティング層が金
型のキャビティ側表面の少なくとも一部に固着、残存し
ていることを特徴とする。The casting mold of the present invention, which has excellent seizure resistance, comprises a mold release agent containing at least one selected from the group consisting of refractory metals, ceramics and graphite as an additive on the cavity side of the mold. Apply to at least a part of the surface,
The coating layer formed by the heat treatment is fixed and left on at least a part of the cavity-side surface of the mold.
【００１１】また、本発明のマグネシウム合金の鋳造法
は、コールドチャンバー型ダイカスト機を用い、上記の
耐焼付き性に優れたマグネシウム合金鋳造用金型を用
い、マグネシウム合金の溶湯温度を６５０〜７５０℃と
し、キャビティへの充填速度を１／１００〜１０／１０
０秒とし、充填後の増圧を２００ｋｇｆ／ｃｍ2 以上と
し、金型温度を１５０〜３５０℃としてマグネシウム合
金を鋳造することを特徴とする。The magnesium alloy casting method of the present invention uses a cold chamber type die casting machine, uses the magnesium alloy casting mold having excellent seizure resistance, and raises the temperature of the molten magnesium alloy to 650 to 750 ° C. And the filling rate into the cavity is 1/100 to 10/10
It is characterized in that the magnesium alloy is cast at 0 seconds, the pressure increase after filling is 200 kgf / cm 2 or more, and the mold temperature is 150 to 350 ° C.
【００１２】更に、本発明のマグネシウム合金の鋳造法
は、ホットチャンバー型ダイカスト機を用い、上記の耐
焼付き性に優れたマグネシウム合金鋳造用金型を用い、
マグネシウム合金の溶湯温度を６００〜７００℃とし、
キャビティへの充填速度を１／１００〜１０／１００秒
とし、金型温度１５０〜２５０℃としてマグネシウム合
金を鋳造することを特徴とする。また、本発明のマグネ
シウム合金の鋳造品は、上記の鋳造法によって製造でき
るものである。Further, in the method of casting a magnesium alloy of the present invention, a hot-chamber die casting machine is used, and a magnesium alloy casting mold having excellent seizure resistance is used.
The temperature of the molten magnesium alloy is 600-700 ° C,
The method is characterized in that the cavity is filled at a rate of 1/100 to 10/100 seconds, and a magnesium alloy is cast at a mold temperature of 150 to 250 ° C. The casting of the magnesium alloy of the present invention can be manufactured by the above-mentioned casting method.
【００１３】[0013]
【発明の実施の形態】以下に、本発明の鋳造用金型の構
成及びその作製法、マグネシウム合金の鋳造法、鋳造法
で用いることのできるマグネシウム合金の種類等につい
て詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION The construction of the casting mold of the present invention, the method of manufacturing the same, the method of casting a magnesium alloy, the type of magnesium alloy that can be used in the casting method, and the like will be described in detail below.
【００１４】本発明の鋳造用金型はマグネシウム合金、
亜鉛合金、アルミニウム合金、銅合金等をダイカスト鋳
造法、低圧鋳造法、重力鋳造法、チキソモールディング
等の金属射出成形法等の金型鋳造法で鋳造する際に用い
るのに適した耐焼付き性に優れた鋳造用金型である。[0014] The casting mold of the present invention is a magnesium alloy,
Suitable for use when casting zinc alloys, aluminum alloys, copper alloys, etc. by die casting such as die casting, low pressure casting, gravity casting, metal injection molding such as thixo molding, etc. It is an excellent casting mold.
【００１５】本発明の鋳造用金型においては、高融点金
属及びセラミックスからなる群より選ばれる少なくとも
１種を含むコーティング層が、金型のキャビティ側表面
の少なくとも一部に設けられており、即ち、全面に設け
られていても、焼付きが生じ易い部分のみに設けられて
いても良く、このことにより耐焼付き性に優れた鋳造用
金型となっている。In the casting mold of the present invention, a coating layer containing at least one selected from the group consisting of high melting point metals and ceramics is provided on at least a part of the cavity side surface of the mold. It may be provided on the entire surface or only on the portion where seizure is likely to occur, thereby providing a casting mold having excellent seizure resistance.
【００１６】このような高融点金属及びセラミックスか
らなる群より選ばれる少なくとも１種を含むコーティン
グ層は、溶射法、ＣＶＤ法、ＰＶＤ法、溶接肉盛法、塗
装法等の任意の手段によって金型のキャビティ側の少な
くとも一部の表面に直接に設けられていてもよく、或い
は、熱衝撃によるコーティング層の剥離を避けるため
に、事前に、表面に溶射法、ＣＶＤ法、ＰＶＤ法、溶接
肉盛法、塗装法等の任意の手段によって設けられたその
ようなコーティング層を有する金属板を、金型のキャビ
ティ側面の少なくとも一部に設けた凹部に付着、装着さ
せて金型のキャビティ側表面の少なくとも一部を形成さ
せることによって設けられていてもよい。The coating layer containing at least one selected from the group consisting of high-melting point metals and ceramics may be formed in a mold by any means such as thermal spraying, CVD, PVD, welding overlay, and painting. May be provided directly on at least a part of the surface of the cavity side, or in order to avoid peeling of the coating layer due to thermal shock, the surface is sprayed in advance, CVD method, PVD method, weld overlaying. Method, a metal plate having such a coating layer provided by any means such as a coating method, is attached to a concave portion provided on at least a part of the cavity side surface of the mold, and attached to the cavity side surface of the mold. It may be provided by forming at least a part.
【００１７】また、本発明の鋳造用金型においては、高
融点金属、セラミックス及び黒鉛からなる群より選ばれ
る少なくとも１種を添加剤として含む離型剤を、通常の
離型剤の塗布と同様にして金型のキャビティ側表面の少
なくとも一部に塗布し、加熱処理することにより形成さ
れたコーティング層が金型のキャビティ側表面の少なく
とも一部に固着、残存している。この添加物含有離型剤
の塗布、加熱処理は通常の離型剤の塗布とは別に実施す
るものであり、ショット毎に塗布、加熱処理する必要は
ない。しかしそのコーティング層は消耗するので、適宜
の間隔で添加物含有離型剤を塗布し、加熱処理すること
が好ましい。Further, in the casting mold of the present invention, a mold release agent containing at least one selected from the group consisting of a high melting point metal, ceramics and graphite as an additive is used in the same manner as in the usual mold release agent application. Then, a coating layer formed by applying the composition to at least a part of the cavity side surface of the mold and performing a heat treatment is fixed and remains on at least a part of the cavity side surface of the mold. The application and the heat treatment of the additive-containing release agent are performed separately from the usual application of the release agent, and it is not necessary to apply and heat the application for each shot. However, since the coating layer is consumed, it is preferable to apply an additive-containing release agent at appropriate intervals and heat-treat.
【００１８】本発明の鋳造用金型においては、高融点金
属がＷ、Ｎｂ、Ｍｏ、Ｔａ、Ｚｒ及びＨｆからなる群よ
り選ばれる少なくとも１種であることが好ましく、ま
た、セラミックスがＭｇＯ、ＢＮ、ＴｉＮ、ＴｉＯ2 、
ＳｉＮ、ＳｉＣ、ＳｉＯ2 、ＴｉＣ、ＷＣ、ＭｏＯ2 及
びＺｒＯ2 からなる群より選ばれる少なくとも１種であ
ることが好ましい。しかし、これらの高融点金属、セラ
ミックスに限定されるものではない。In the casting mold of the present invention, the high melting point metal is preferably at least one selected from the group consisting of W, Nb, Mo, Ta, Zr and Hf, and the ceramic is MgO, BN. , TiN, TiO 2 ,
It is preferably at least one selected from the group consisting of SiN, SiC, SiO 2 , TiC, WC, MoO 2 and ZrO 2 . However, it is not limited to these high melting point metals and ceramics.
【００１９】本発明の鋳造用金型はマグネシウム合金、
亜鉛合金、アルミニウム合金、銅合金等をダイカスト鋳
造法、低圧鋳造法、重力鋳造法、チキソモールディング
等の金属射出成形法等の金型鋳造法で鋳造する際に用い
るのに適しているが、自動車部品や家電製品部品等につ
いて軽量化、リサイクル可能化に適しているマグネシウ
ム合金の鋳造に用いるのに特に適した鋳造用金型であ
り、以下にマグネシウム合金の鋳造法について説明す
る。The casting mold of the present invention is a magnesium alloy,
Suitable for casting zinc alloy, aluminum alloy, copper alloy, etc. by die casting such as die casting, low pressure casting, gravity casting, metal injection molding such as thixo molding, etc. It is a casting mold particularly suitable for use in casting magnesium alloy which is suitable for weight reduction and recyclability of parts and home electric appliance parts, and the casting method of magnesium alloy will be described below.
【００２０】本発明のマグネシウム合金の鋳造法で用い
ることのできるマグネシウム合金は、ダイカスト鋳造
法、低圧鋳造法、重力鋳造法、チキソモールディング等
の金属射出成形法等の金型鋳造法で鋳造できるマグネシ
ウム合金であればいかなるものでもよく、例えば、従来
一般的に用いられているＭＤ１Ａ、ＭＤ１Ｂ、ＭＤ１
Ｄ、ＭＤ２Ａ、ＭＤ２Ｂ、ＭＤ３Ａ等を用いることがで
きる。The magnesium alloy which can be used in the magnesium alloy casting method of the present invention is a magnesium alloy which can be cast by a die casting method such as a metal injection molding method such as a die casting method, a low pressure casting method, a gravity casting method, a thixo molding method. Any alloy may be used, for example, MD1A, MD1B, MD1 conventionally used generally.
D, MD2A, MD2B, MD3A and the like can be used.
【００２１】しかし、自動車エンジン部品などの軽量化
において要請されている５２３Ｋ程度までの高温でも十
分な強度を有するマグネシウム合金の高耐食性鋳造品を
目的とする場合には、 ｉ）アルミニウム１〜１０重量％、 ii）希土類元素０．２〜５重量％、カルシウム０．０２
〜５重量％、及びケイ素０．２〜１０重量％よりなる群
から選ばれた少なくとも１種、及び iii)マンガン１．５重量％以下 を含み、残部がマグネシウム及び不可避の不純物からな
るマグネシウム合金を用いることが好ましい。However, when a high corrosion resistance cast product of a magnesium alloy having sufficient strength even at a high temperature up to about 523 K, which is required for weight reduction of automobile engine parts and the like, is intended for: i) 1 to 10 weight parts of aluminum Ii) 0.2 to 5% by weight of rare earth element, 0.02% of calcium
-5% by weight, and at least one selected from the group consisting of 0.2-10% by weight of silicon; and iii) 1.5% by weight or less of manganese, with the balance being magnesium and unavoidable impurities. Preferably, it is used.
【００２２】コールドチャンバーダイカスト鋳造法で鋳
造する場合には、コールドチャンバー型ダイカスト機を
用い、前記の耐焼付き性に優れたマグネシウム合金鋳造
用金型を用い、マグネシウム合金の溶湯温度を６５０〜
７５０℃、好ましくは６５０〜７１０℃とし、キャビテ
ィへの充填速度を１／１００〜１０／１００秒、好まし
くは１／１００〜５／１００秒とし、充填後の増圧を２
００ｋｇｆ／ｃｍ2 以上、好ましくは４００ｋｇｆ／ｃ
ｍ2 以上とし、金型温度を１５０〜３５０℃、好ましく
は１８０〜２８０℃としてマグネシウム合金を鋳造する
ことが好ましい。In the case of casting by the cold chamber die casting method, a cold chamber type die casting machine is used, and the magnesium alloy casting mold having excellent seizure resistance is used.
750 ° C., preferably 650 to 710 ° C., the filling rate into the cavity is 1/100 to 10/100 seconds, preferably 1/100 to 5/100 seconds, and the pressure increase after filling is 2
00 kgf / cm 2 or more, preferably 400 kgf / c
m 2 or more, and the mold temperature is preferably 150 to 350 ° C., and more preferably 180 to 280 ° C., to cast the magnesium alloy.
【００２３】また、ホットチャンバーダイカスト鋳造法
で鋳造する場合には、ホットチャンバー型ダイカスト機
を用い、前記の耐焼付き性に優れたマグネシウム合金鋳
造用金型を用い、マグネシウム合金の溶湯温度を６００
〜７００℃とし、キャビティへの充填速度を１／１００
〜１０／１００秒とし、金型温度１５０〜２５０℃とし
てマグネシウム合金を鋳造することが好ましい。In the case of casting by a hot chamber die casting method, a hot chamber type die casting machine is used, and a magnesium alloy casting mold having excellent seizure resistance is used.
Up to 700 ° C., and the filling rate into the cavity is 1/100
It is preferable to cast the magnesium alloy at a temperature of 150 to 250 ° C. and a mold temperature of 150 to 250 ° C.
【００２４】更に、チキソモールディング法で鋳造する
場合には、チキソモールディングを含む金属射出成形機
を用い、マグネシウム合金の溶湯温度を５５０〜６５０
℃とし、キャビティへの充填速度を１／１００〜１０／
１００秒とし、金型温度を１５０〜３５０℃としてマグ
ネシウム合金を鋳造することが好ましい。上記の各々の
鋳造法を用いることにより、肉厚が１．５ｍｍ以下の部
分を有するダイカスト製品を鋳造することが可能とな
る。Further, when casting by the thixomolding method, a metal injection molding machine including thixomolding is used, and the temperature of the molten magnesium alloy is set to 550 to 650.
° C and the filling rate into the cavity is 1/100 to 10 /
It is preferable to cast the magnesium alloy at a mold temperature of 150 to 350 ° C. for 100 seconds. By using each of the above-mentioned casting methods, it becomes possible to cast a die-cast product having a portion having a thickness of 1.5 mm or less.
【００２５】[0025]
【実施例】以下に、実施例及び比較例に基づいて本発明
を具体的に説明する。 実施例１ Ａ４サイズ（２１０ｍｍ×２９７ｍｍ）で、深さ１０ｍ
ｍ、厚さ１ｍｍ（一部０．８ｍｍの部分あり）の箱型の
試作品を鋳造することができ、溶湯がゲート部直後で金
型のキャビティ側表面に直接垂直近くで当たる形状とな
っている金型を用意した。タルク系離型剤に離型剤の重
量の１０重量％に相当する量のＭｇＯ粉末を添加し、こ
の混合物を金型のキャビティ側表面の焼付きが生じ易い
ゲート部直後の溶湯が直接垂直近くで当たる領域に塗布
し、バーナーで加熱処理し、該領域に固着、残存してい
るコーティング層を形成させて本発明の鋳造用金型を得
た。The present invention will be specifically described below based on examples and comparative examples. Example 1 A4 size (210 mm × 297 mm) with a depth of 10 m
m, a box-shaped prototype with a thickness of 1 mm (part of which has a portion of 0.8 mm) can be cast, and the shape is such that the molten metal directly hits the cavity side surface of the mold immediately near the gate, almost vertically. I prepared a mold. An amount of MgO powder equivalent to 10% by weight of the release agent is added to the talc-based release agent, and the mixture is directly vertical to the molten metal immediately after the gate where seizure of the cavity side surface of the mold is likely to occur. Was applied to the area corresponding to the above, and heat-treated with a burner to form a coating layer fixed and remaining in the area to obtain a casting mold of the present invention.
【００２６】実施例２ 実施例１で用いた金型と同一形状の金型を用い、実施例
１で用いたＭｇＯ粉末の代りにＢＮ、ＴｉＮ、Ｔｉ
Ｏ2 、ＳｉＮ、ＳｉＣ、ＳｉＯ2 、ＴｉＣ、ＷＣ、Ｍｏ
Ｏ2 又はＺｒＯ2 の粉末を用いて実施例１と同様に処理
して本発明の鋳造用金型を得た。Example 2 A mold having the same shape as the mold used in Example 1 was used, and instead of the MgO powder used in Example 1, BN, TiN, Ti
O 2 , SiN, SiC, SiO 2 , TiC, WC, Mo
The same treatment as in Example 1 was carried out using O 2 or ZrO 2 powder to obtain a casting mold of the present invention.
【００２７】比較例１ 実施例１で用いた金型と同一形状の金型であるが、金型
のキャビティ側表面にコーティング層を持たない金型を
比較例１とした。Comparative Example 1 A mold having the same shape as the mold used in Example 1 but having no coating layer on the cavity side surface of the mold was used as Comparative Example 1.
【００２８】実施例３ 自動車部品を模した３００ｍｍ×３００ｍｍ×１８０ｍ
ｍで肉厚３ｍｍの箱型の試作品を鋳造することができ、
溶湯がゲート部直後で金型のキャビティ側表面に直接垂
直近くで当たる形状となっている金型を用意した。この
金型のキャビティ側表面の焼付きが生じ易いゲート部直
後の溶湯が直接垂直近くで当たる領域にＭｏ合金を溶射
してコーティング層を形成させることにより本発明の鋳
造用金型を得た。Example 3 300 mm × 300 mm × 180 m simulating an automobile part
m can cast a 3mm thick box prototype,
A mold was prepared in which the molten metal directly hit the cavity-side surface of the mold near the vertical immediately after the gate portion. The casting die of the present invention was obtained by spraying a Mo alloy on a region where the molten metal directly on the cavity side surface of the die immediately adjacent to the gate portion directly hits near vertical was coated with a Mo alloy to form a coating layer.
【００２９】実施例４ 実施例３で用いた金型と同一形状の金型を用い、実施例
３で用いたＭｏ合金の代りにＷ、Ｎｂ、Ｔａ、Ｚｒ又は
Ｈｆ或いはそれらの何れかの金属の合金を用いて実施例
３と同様に溶射して本発明の鋳造用金型を得た。Example 4 A mold having the same shape as the mold used in Example 3 was used, and instead of the Mo alloy used in Example 3, W, Nb, Ta, Zr or Hf or any of these metals was used. In the same manner as in Example 3, thermal spraying was performed using the alloy No. 3 to obtain a casting mold of the present invention.
【００３０】比較例２ 実施例３で用いた金型と同一形状の金型であるが、金型
のキャビティ側表面にコーティング層を持たない金型を
比較例２とした。Comparative Example 2 Comparative Example 2 was a mold having the same shape as the mold used in Example 3, but having no coating layer on the cavity side surface of the mold.
【００３１】実施例５ １００ｍｍ×１００ｍｍで深さ７ｍｍ、厚さ０．８ｍｍ
の箱型の試作品を鋳造することができ、溶湯がゲート部
直後で金型のキャビティ側表面に直接垂直近くで当たる
形状となっている金型を用意した。この金型のキャビテ
ィ側表面の焼付きが生じ易いゲート部直後の領域に均一
深さの浅い凹部を形成した。一方、この凹部の平面形状
と同一の平面形状を持ち、この凹部の深さとほぼ同一の
厚さ（厳格には、コーティング層を設けた時に同一の厚
さになる）を持つ鉄板の表面にＣＶＤ法によりＴｉＣＮ
（ＴｉＣとＴｉＮとの混合物）からなるコーティング層
を形成させた。この鉄板を上記の凹部に嵌め込んで本発
明の鋳造用金型を得た。Example 5 100 mm × 100 mm, depth 7 mm, thickness 0.8 mm
A prototype was prepared in which a box prototype could be cast, and the molten metal directly hit the cavity-side surface of the mold near the vertical immediately after the gate portion. A shallow concave portion having a uniform depth was formed in a region on the cavity side surface of the mold immediately after the gate portion where seizure easily occurs. On the other hand, the surface of an iron plate having the same planar shape as the concave portion and having the same thickness as the depth of the concave portion (strictly, the same thickness when the coating layer is provided) is formed on the surface of the iron plate. TiCN by the method
(A mixture of TiC and TiN) was formed. This iron plate was fitted into the above-mentioned concave portion to obtain a casting mold of the present invention.
【００３２】比較例３ 実施例５で用いた金型と同一形状の金型であるが、表面
にコーティング層を持たない鉄板を凹部に嵌め込ん金型
を比較例３とした。Comparative Example 3 A mold having the same shape as the mold used in Example 5, except that an iron plate having no coating layer on its surface was fitted into the concave portion.
【００３３】比較例４ ＡＺ９１（Ｍｇ−９Ａｌ−０．７Ｚｎ−０．２Ｍｎ）系
マグネシウム合金を用い、コールドチャンバー型ダイカ
スト機として宇部製の６５０ｔ機を用い、比較例１の金
型を用い、金型のキャビティ側表面にタルク系離型剤
（花野商事製）をショット毎に塗布し、合金溶湯温度を
７００℃とし、キャビティへの充填速度を３／１００秒
とし、充填後の増圧を５００ｋｇｆ／ｃｍ2 とし、金型
温度を３００℃として、Ａ４サイズ（２１０ｍｍ×２９
７ｍｍ）で深さ１０ｍｍ、厚さ１ｍｍ（一部０．８ｍｍ
の部分あり）の箱型の試作品の鋳造を実施した。この鋳
造においては３ショット目に焼付きが発生した。Comparative Example 4 An AZ91 (Mg-9Al-0.7Zn-0.2Mn) -based magnesium alloy was used, a 650t machine made by Ube was used as a cold chamber die casting machine, and the mold of Comparative Example 1 was used. A talc release agent (manufactured by Hanano Shoji Co.) is applied to the cavity side surface of the mold for each shot, the temperature of the alloy melt is set to 700 ° C., the filling speed to the cavity is set to 3/100 seconds, and the pressure increase after filling is 500 kgf. / Cm 2 and a mold temperature of 300 ° C., A4 size (210 mm × 29
7mm), depth 10mm, thickness 1mm (0.8mm in part)
Was carried out). In this casting, seizure occurred at the third shot.
【００３４】実施例６ 比較例４で用いた比較例１の金型の代りに実施例１で得
た金型を用いた以外は比較例４と同様にして鋳造した。
この鋳造においては５２ショット目に焼付きが発生し
た。Example 6 A casting was performed in the same manner as in Comparative Example 4 except that the mold obtained in Example 1 was used instead of the mold of Comparative Example 1 used in Comparative Example 4.
In this casting, seizure occurred at the 52nd shot.
【００３５】比較例５ マグネシウム合金として、焼付き要因となるＲＥ（ミッ
シュメタル）及び／又はカルシウム及び／又はケイ素含
有率の高い 合金１＝Ｍｇ−５Ａｌ−２Ｃａ−２ＲＥ−０．２Ｍｎ、 合金２＝Ｍｇ−５Ａｌ−４Ｃａ−０．２Ｍｎ、 合金３＝Ｍｇ−５Ａｌ−４ＲＥ−０．２Ｍｎ、 合金４＝Ｍｇ−５Ａｌ−８Ｓｉ−０．２Ｍｎ のいずれかを用い、コールドチャンバー型ダイカスト機
として宇部製の６５０ｔ機を用い、比較例２の金型を用
い、金型のキャビティ側表面にタルク系離型剤（花野商
事製）をショット毎に塗布し、合金溶湯温度を７００℃
とし、キャビティへの充填速度を５／１００秒とし、充
填後の増圧を５００ｋｇｆ／ｃｍ2 とし、金型温度を２
５０℃とし、ダイカスト鋳造時の金型内の空気圧を５０
ｍｍＨｇとして、自動車部品を模した３００ｍｍ×３０
０ｍｍ×１８０ｍｍで肉厚３ｍｍの箱型の試作品の鋳造
を実施した。これらの鋳造においては４種の合金とも１
０ショット目以内に焼付きが発生した。COMPARATIVE EXAMPLE 5 As a magnesium alloy, alloy 1 having a high content of RE (misch metal) and / or calcium and / or silicon which causes seizure was obtained. Alloy 1 = Mg-5Al-2Ca-2RE-0.2Mn, Alloy 2 = Mg-5Al-4Ca-0.2Mn, Alloy 3 = Mg-5Al-4RE-0.2Mn, Alloy 4 = Mg-5Al-8Si-0.2Mn Using a 650t machine and the mold of Comparative Example 2, a talc-based release agent (manufactured by Hanano Shoji Co.) was applied to the cavity side surface of the mold for each shot, and the temperature of the molten alloy was set at 700 ° C.
The filling speed into the cavity was 5/100 seconds, the pressure increase after filling was 500 kgf / cm 2 , and the mold temperature was 2
50 ° C and the air pressure in the mold during die casting
As mmHg, 300 mm x 30 simulating automobile parts
A box-shaped prototype having a thickness of 0 mm × 180 mm and a thickness of 3 mm was cast. In these castings, all four alloys were 1
Seizure occurred within the 0th shot.
【００３６】実施例７ 比較例５で用いた比較例２の金型の代りに実施例３で得
た金型を用いた以外は比較例５と同様にして鋳造した。
これらの鋳造においては４種の合金とも３０００ショッ
トの鋳造を実施したが、いずれも焼付きは発生せず、連
続的に鋳造することができた。Example 7 A casting was performed in the same manner as in Comparative Example 5 except that the mold obtained in Example 3 was used instead of the mold of Comparative Example 2 used in Comparative Example 5.
In these castings, 3000 shots were cast for all four types of alloys, but no seizure occurred and continuous casting was possible.
【００３７】比較例６ ＡＺ９１（Ｍｇ−９Ａｌ−０．７Ｚｎ−０．２Ｍｎ）合
金を用い、ホットチャンバー型ダイカスト機を用い、比
較例３の金型を用い、金型のキャビティ側表面に水溶性
離型剤（グラフェース、花野商事製）をショット毎に塗
布し、合金溶湯温度を６３０℃とし、キャビティへの充
填速度を３／１００秒とし、金型温度を２００℃とし
て、１００ｍｍ×１００ｍｍで深さ７ｍｍ、厚さ０．８
ｍｍの箱型の試作品の鋳造を実施した。この鋳造におい
ては２５０ショット目に焼付きが発生した。COMPARATIVE EXAMPLE 6 Using AZ91 (Mg-9Al-0.7Zn-0.2Mn) alloy, using a hot-chamber die-casting machine and the mold of Comparative Example 3, water-soluble on the cavity side surface of the mold A mold release agent (Graface, manufactured by Hanano Shoji) is applied for each shot, the temperature of the molten alloy is set to 630 ° C., the filling speed in the cavity is set to 3/100 seconds, the mold temperature is set to 200 ° C., and 100 mm × 100 mm. 7mm deep, 0.8 thick
Casting of a box-shaped prototype of mm was carried out. In this casting, seizure occurred at the 250th shot.
【００３８】実施例８ 比較例６で用いた比較例３の金型の代りに実施例５で得
た金型を用いた以外は比較例６と同様にして鋳造した。
この鋳造においては１００００ショットの鋳造を実施し
たが、焼付きは発生せず、連続的に鋳造することができ
た。Example 8 A casting was performed in the same manner as in Comparative Example 6 except that the mold obtained in Example 5 was used instead of the mold of Comparative Example 3 used in Comparative Example 6.
In this casting, 10,000 shots were cast. However, seizure did not occur and continuous casting was possible.
【００３９】[0039]
【発明の効果】本発明の鋳造用金型は耐焼付き性に優れ
ており且つマグネシウム合金、亜鉛合金、アルミニウム
合金、銅合金等の鋳造に用いるのに適しており、特に自
動車部品や家電製品部品等について軽量化、リサイクル
可能化に適しているマグネシウム合金の鋳造に用いるの
に適しており、より安価に高品質なマグネシウム合金鋳
造品の製造が可能になった。The casting mold of the present invention has excellent seizure resistance and is suitable for use in casting magnesium alloys, zinc alloys, aluminum alloys, copper alloys, etc., and in particular, automobile parts and home appliance parts. For example, it is suitable for use in casting magnesium alloy which is suitable for weight reduction and recyclability, and it has become possible to produce a high quality magnesium alloy casting at lower cost.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 野坂 洋一 山梨県韮崎市大草町下条西割1200 三井金 属鉱業株式会社内 Ｆターム(参考） 4E093 NA01 NB08 NB09 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yoichi Nosaka 1200 Shimojo Nishiwari, Ogusa-cho, Nirasaki-shi, Yamanashi F-term in Mitsui Kinzoku Mining Co., Ltd. 4E093 NA01 NB08 NB09
Claims (11)
に、高融点金属及びセラミックスからなる群より選ばれ
る少なくとも１種を含むコーティング層が設けられてい
ることを特徴とする耐焼付き性に優れた鋳造用金型。An excellent seizure resistance characterized in that a coating layer containing at least one selected from the group consisting of high melting point metals and ceramics is provided on at least a part of a cavity side surface of a mold. Casting mold.
る群より選ばれる少なくとも１種を含むコーティング層
を有する金属板が、金型のキャビティ側面の少なくとも
一部に付着、装着されていて金型のキャビティ側表面の
少なくとも一部を形成していることを特徴とする請求項
１記載の耐焼付き性に優れた鋳造用金型。2. A metal plate having a coating layer containing at least one selected from the group consisting of a high melting point metal and a ceramic on a surface thereof is attached and attached to at least a part of a cavity side surface of the mold. 2. The casting mold having excellent seizure resistance according to claim 1, wherein at least a part of the cavity-side surface is formed.
Ｄ法、溶接肉盛法又は塗装法によって形成されたもので
ある請求項１又は２記載の耐焼付き性に優れた鋳造用金
型。3. The method according to claim 1, wherein the coating layer is formed by thermal spraying, CVD, PV
The casting mold excellent in seizure resistance according to claim 1 or 2, which is formed by a D method, a welding overlay method or a painting method.
る群より選ばれる少なくとも１種を添加剤として含む離
型剤を金型のキャビティ側表面の少なくとも一部に塗布
し、加熱処理することにより形成されたコーティング層
が金型のキャビティ側表面の少なくとも一部に固着、残
存していることを特徴とする耐焼付き性に優れた鋳造用
金型。4. A mold release agent containing at least one selected from the group consisting of refractory metals, ceramics and graphite as an additive is applied to at least a part of the cavity-side surface of a mold, and heat-treated. A casting mold having excellent seizure resistance, characterized in that the applied coating layer adheres to and remains on at least a part of the cavity-side surface of the mold.
及びＨｆからなる群より選ばれる少なくとも１種であ
り、セラミックスがＭｇＯ、ＢＮ、ＴｉＮ、ＴｉＯ2 、
ＳｉＮ、ＳｉＣ、ＳｉＯ2 、ＴｉＣ、ＷＣ、ＭｏＯ2 及
びＺｒＯ2 からなる群より選ばれる少なくとも１種であ
る請求項１〜４の何れかに記載の耐焼付き性に優れた鋳
造用金型。5. The high melting point metal is W, Nb, Mo, Ta, Zr.
And Hf, and the ceramic is MgO, BN, TiN, TiO 2 ,
SiN, SiC, SiO 2, TiC , WC, MoO 2 and excellent casting mold in galling resistance according to claim 1 is at least one selected from the group consisting of ZrO 2.
である請求項１〜５の何れかに記載の耐焼付き性に優れ
た鋳造用金型。6. The casting mold having excellent seizure resistance according to claim 1, wherein the casting mold is a magnesium alloy casting mold.
い、請求項６記載の耐焼付き性に優れたマグネシウム合
金鋳造用金型を用い、マグネシウム合金の溶湯温度を６
５０〜７５０℃とし、キャビティへの充填速度を１／１
００〜１０／１００秒とし、充填後の増圧を２００ｋｇ
ｆ／ｃｍ2 以上とし、金型温度を１５０〜３５０℃とし
てマグネシウム合金を鋳造することを特徴とするマグネ
シウム合金の鋳造法。7. A magnesium alloy casting mold having excellent seizure resistance according to claim 6 using a cold chamber type die casting machine, wherein the temperature of the molten magnesium alloy is 6
50 to 750 ° C, filling rate to the cavity is 1/1
00 ~ 100/100 seconds, pressure increase after filling 200kg
A casting method of a magnesium alloy, wherein the magnesium alloy is cast at a temperature of f / cm 2 or more and a mold temperature of 150 to 350 ° C.
請求項６記載の耐焼付き性に優れたマグネシウム合金鋳
造用金型を用い、マグネシウム合金の溶湯温度を６００
〜７００℃とし、キャビティへの充填速度を１／１００
〜１０／１００秒とし、金型温度１５０〜２５０℃とし
てマグネシウム合金を鋳造することを特徴とするマグネ
シウム合金の鋳造法。8. A hot chamber type die casting machine,
7. A magnesium alloy casting mold having excellent seizure resistance according to claim 6, wherein the temperature of the molten magnesium alloy is 600.
Up to 700 ° C., and the filling rate into the cavity is 1/100
A magnesium alloy casting method, wherein the magnesium alloy is cast at a mold temperature of 150 to 250 ° C. for 100/100 seconds.
カスト製品を鋳造することを特徴とする請求項７又は８
記載のマグネシウム合金の鋳造法。9. A die-cast product having a portion having a thickness of 1.5 mm or less is cast.
The casting method of the magnesium alloy as described above.
〜５重量％、及びケイ素０．２〜１０重量％よりなる群
から選ばれた少なくとも１種、及び iii)マンガン１．５重量％以下 を含み、残部がマグネシウム及び不可避の不純物からな
るマグネシウム合金を用いることを特徴とする請求項７
〜９の何れかに記載のマグネシウム合金の鋳造法。10. A magnesium alloy comprising: i) 1 to 10% by weight of aluminum; ii) 0.2 to 5% by weight of a rare earth element;
-5% by weight, and at least one selected from the group consisting of 0.2-10% by weight of silicon; and iii) 1.5% by weight or less of manganese, with the balance being magnesium and unavoidable impurities. 8. A method according to claim 7, wherein
10. The method for casting a magnesium alloy according to any one of claims 9 to 9.
によって製造できるマグネシウム合金の鋳造品。11. A casting of a magnesium alloy which can be produced by the casting method according to claim 7.
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|---|---|---|---|
| JP27221799A JP4596580B2 (en) | 1999-09-27 | 1999-09-27 | Magnesium alloy casting method and castings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27221799A JP4596580B2 (en) | 1999-09-27 | 1999-09-27 | Magnesium alloy casting method and castings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001096336A true JP2001096336A (en) | 2001-04-10 |
| JP4596580B2 JP4596580B2 (en) | 2010-12-08 |
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ID=17510754
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|---|---|---|---|
| JP27221799A Expired - Lifetime JP4596580B2 (en) | 1999-09-27 | 1999-09-27 | Magnesium alloy casting method and castings |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003010958A (en) * | 2001-06-28 | 2003-01-15 | Mitsui Mining & Smelting Co Ltd | Mold for die cast molding, die cast molding method, and molded product |
| WO2023176450A1 (en) * | 2022-03-17 | 2023-09-21 | 株式会社プロテリアル | Composite material, method for producing composite material, and mold |
Citations (2)
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|---|---|---|---|---|
| JPH0578339U (en) * | 1992-04-01 | 1993-10-26 | 本田技研工業株式会社 | Mold casting equipment |
| JP2979784B2 (en) * | 1991-09-27 | 1999-11-15 | スズキ株式会社 | Method for producing fiber-reinforced composite member |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5717363A (en) * | 1980-07-04 | 1982-01-29 | Toyota Motor Corp | Die casting metallic mold for high melting point metal |
| JPS63174952U (en) * | 1987-04-28 | 1988-11-14 | ||
| JPH0811279B2 (en) * | 1990-04-23 | 1996-02-07 | 吉則 片平 | Die casting method |
| JPH04274836A (en) * | 1991-03-01 | 1992-09-30 | Honda Motor Co Ltd | Casting metal mold for wheel of vehicle |
| JPH06179045A (en) * | 1992-12-10 | 1994-06-28 | Hitachi Metals Ltd | Casting die |
| JPH08174147A (en) * | 1994-12-28 | 1996-07-09 | Honda Motor Co Ltd | Casting die |
| JP3522963B2 (en) * | 1996-04-04 | 2004-04-26 | 三井金属鉱業株式会社 | Method for producing heat-resistant magnesium alloy member, magnesium alloy used therefor, and magnesium alloy molded member |
-
1999
- 1999-09-27 JP JP27221799A patent/JP4596580B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2979784B2 (en) * | 1991-09-27 | 1999-11-15 | スズキ株式会社 | Method for producing fiber-reinforced composite member |
| JPH0578339U (en) * | 1992-04-01 | 1993-10-26 | 本田技研工業株式会社 | Mold casting equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003010958A (en) * | 2001-06-28 | 2003-01-15 | Mitsui Mining & Smelting Co Ltd | Mold for die cast molding, die cast molding method, and molded product |
| WO2023176450A1 (en) * | 2022-03-17 | 2023-09-21 | 株式会社プロテリアル | Composite material, method for producing composite material, and mold |
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| Publication number | Publication date |
|---|---|
| JP4596580B2 (en) | 2010-12-08 |
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