JPH0219440A - Mg-sr alloy for modifying al-si casting alloy - Google Patents
Mg-sr alloy for modifying al-si casting alloyInfo
- Publication number
- JPH0219440A JPH0219440A JP16670088A JP16670088A JPH0219440A JP H0219440 A JPH0219440 A JP H0219440A JP 16670088 A JP16670088 A JP 16670088A JP 16670088 A JP16670088 A JP 16670088A JP H0219440 A JPH0219440 A JP H0219440A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- casting
- modifying
- content
- 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.)
- Granted
Links
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 38
- 239000000956 alloy Substances 0.000 title claims abstract description 38
- 238000005266 casting Methods 0.000 title claims abstract description 14
- 229910001278 Sr alloy Inorganic materials 0.000 title claims abstract description 6
- 229910052712 strontium Inorganic materials 0.000 claims abstract description 5
- 229910018125 Al-Si Inorganic materials 0.000 claims abstract description 4
- 229910018520 Al—Si Inorganic materials 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 229910021364 Al-Si alloy Inorganic materials 0.000 abstract description 6
- 238000012986 modification Methods 0.000 abstract description 3
- 230000004048 modification Effects 0.000 abstract description 3
- 238000004512 die casting Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 description 15
- 239000002184 metal Substances 0.000 description 15
- 230000008018 melting Effects 0.000 description 11
- 238000002844 melting Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910000676 Si alloy Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910003526 Sr—Si Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- VHHHONWQHHHLTI-UHFFFAOYSA-N hexachloroethane Chemical compound ClC(Cl)(Cl)C(Cl)(Cl)Cl VHHHONWQHHHLTI-UHFFFAOYSA-N 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910001631 strontium chloride Inorganic materials 0.000 description 1
- AHBGXTDRMVNFER-UHFFFAOYSA-L strontium dichloride Chemical compound [Cl-].[Cl-].[Sr+2] AHBGXTDRMVNFER-UHFFFAOYSA-L 0.000 description 1
- FVRNDBHWWSPNOM-UHFFFAOYSA-L strontium fluoride Chemical compound [F-].[F-].[Sr+2] FVRNDBHWWSPNOM-UHFFFAOYSA-L 0.000 description 1
- 229910001637 strontium fluoride Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、Ａｌ−Ｓｉ系鋳物合金改質用Ｍｇ −Ｓｒ
合金に関し、特に、ダイキャスト、ＡＩ鋳物など鋳造用
材料として用いられるＡｌ−Ｓｉ系合金の共晶、亜共晶
の鋳造組織を改質する目的で使うときに有利なＭｇ−５
ｔ合金についての提案である。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for modifying Mg-Sr casting alloys based on Al-Si.
Regarding alloys, Mg-5 is particularly advantageous when used for the purpose of modifying the eutectic and hypoeutectic casting structures of Al-Si alloys used as casting materials such as die casting and AI casting.
This is a proposal regarding t-alloy.
従来、鋳造用Ａｌ−Ｓｉ系合金（以下、ＡＩ −Ｓｉ系
鋳物合金という）の鋳物は、金属ＮａまたはＮａＦを含
むフラックスを添加する溶湯処理を施すことにより、結
晶の微細化を導いて、機械的性質を改善していた。Conventionally, castings of Al-Si alloys for casting (hereinafter referred to as AI-Si casting alloys) have been subjected to molten metal treatment by adding flux containing metallic Na or NaF to lead to finer crystals and to improve mechanical performance. It had improved its physical properties.
しかし、Ｎａ添加による上記の改質法は、添加後の改質
効果持続時間が短かく、またこのＮａなどの添加による
改質処理を複数回繰返して行う必要があるため作業性が
悪く、かつ得られたＡｌ−Ｓｉ系合金鋳物は均一な品質
のものが得られ難いという欠点があった。However, the above-mentioned modification method by adding Na has poor workability because the duration of the modification effect after addition is short, and the modification treatment by addition of Na etc. needs to be repeated multiple times. The resulting Al--Si alloy castings had a drawback in that it was difficult to obtain uniform quality.
こうした欠点を克服するものとして、従来、Ａｌ−Ｓｉ
系鋳物合金の改質にあたり、Ｓｒに着目した幾つかの技
術：すなわち、ＡＩ −５ｔ−５ｔ母合金やＡｌ−１Ｏ
％Ｓ「母合金を用いることの有効性が、特開昭５２−６
３８０８号公報などで提案されている。To overcome these drawbacks, Al-Si
Several technologies have focused on Sr when modifying cast alloys: namely, AI-5t-5t master alloy and Al-1O
%S "The effectiveness of using a master alloy was demonstrated in JP-A-52-6
This is proposed in Publication No. 3808 and the like.
ところが、従来の上記Ａｌ−Ｓｉ−５ｔ母合金（ｔａｐ
：約１０００℃）は、融点が高（、ＡＩ −Ｓｉ系合金
に添加する際、溶解に時間がかかることから、Ｓｒ歩留
りが悪いという欠点があった。However, the conventional Al-Si-5t master alloy (tap
: about 1000°C) has a high melting point (when added to an AI-Si alloy, it takes time to melt, so it has the disadvantage of poor Sr yield.
一方、ＡＩ −１０％Ｓｒ母合金は、上記Ａｌ−５ｔ−
３ｔ母合金に較べると融点が低く、相対的には溶解時間
の大幅な短縮が得られる。しかしながら、この母合金が
有する融点は約８００℃であり、溶融ＡＩ −Ｓｉ系合
金の作業温度（一般には７２０〜７５０℃）と比較する
とまだ高いために、Ａｌ−１０％Ｓｒ合金１００ ｇ当
り約２〜４分の溶解時間が必要であった。On the other hand, the AI-10%Sr master alloy is the Al-5t-
Compared to the 3t master alloy, it has a lower melting point and relatively shortens the melting time. However, the melting point of this master alloy is about 800°C, which is still high compared to the working temperature of molten AI-Si alloys (generally 720 to 750°C), so the A dissolution time of 2-4 minutes was required.
もっとも、Ａｔ−別母合金中のＳｒ含有量を９０％程度
または５％以下にすれば、もっと速やかに溶解するが、
例えばＳｒ含有量９０％のものだとＳｒの揮散が激しく
、Ｓｒ歩留りが低下するし、一方、Ｓｒ含有量５％以下
のものだとＡｌ−５ｒ母合金の添加量が多くなるという
問題点があった。However, if the Sr content in the At-separate mother alloy is reduced to about 90% or 5% or less, it will dissolve more quickly.
For example, if the Sr content is 90%, Sr will volatilize violently and the Sr yield will decrease, while if the Sr content is less than 5%, the problem is that the amount of Al-5r master alloy added will increase. there were.
本発明の目的は、上述の従来技術が抱える溶解性と歩留
りとが悪いという課題を克服し、一方ではさらに、通常
Ａｌ−５ｒ系合金に機械的性質改善のために添加する１
４ｇのロス分を補う役目を担わせることにある。The purpose of the present invention is to overcome the problems of poor solubility and yield of the prior art described above, and at the same time, furthermore, it is an object of the present invention to overcome the problems of poor solubility and yield of the prior art.
The purpose is to have it play the role of compensating for the loss of 4g.
すなわち、鋳造用Ａｌ−Ｓｉ系合金に対しては、従来、
０．３〜１％程度のＭｇなどの金属を添加することによ
り、機械的性質の改善を図っていた。しかし、Ａｌ−５
ｒ合金溶湯中のＭｇは、溶湯処理や成形処理の際に揮散
しやすく目標添加成分より若干低下するのが普通である
。That is, for Al-Si alloys for casting, conventionally,
The mechanical properties were improved by adding metals such as Mg in an amount of about 0.3 to 1%. However, Al-5
Mg in the r-alloy molten metal tends to volatilize during molten metal processing and molding processing, and is usually slightly lower than the target addition component.
この発明にかかるＭｇ−５ｒ合金は、まさにかかるＭｇ
が不足する場合の軸成分調整剤としての働きをも有する
ものである。The Mg-5r alloy according to the present invention has exactly such Mg
It also functions as an axial component adjusting agent when there is a shortage of .
そこで本発明は、従来のＡｌ−５ｒ合金に代えて、不足
Ｍｇの補給ができると共に溶解時間の短縮に著しい効果
を発揮する範囲のＳｒ含有量を調整した合金を提案する
ことで、所期の目的を実現せんとしたものである。Therefore, in place of the conventional Al-5r alloy, the present invention proposes an alloy in which the Sr content is adjusted within a range that can replenish the insufficient Mg and exhibit a remarkable effect in shortening the melting time. It was intended to achieve its purpose.
上述の目的を実現するために鋭意研究した結果、本発明
者は、Ｓｒ５〜５０１％を含み、残部が実質的にＭｇよ
りなるＭｇ −Ｓｒ合金に想到し、この合金によれば上
記課題が克服出来ることを見い出したのである。As a result of intensive research to achieve the above-mentioned object, the present inventors came up with an Mg-Sr alloy containing 5 to 501% Sr, with the remainder substantially consisting of Mg, and this alloy overcomes the above-mentioned problems. I found out what was possible.
この発明のＭｇ−５ｒ合金を製造する方法には、Ｍｇ溶
湯中に、塩化ストロンチウム、弗化ストロンチウムなど
のＳｒ化合物を添加し、これを反応させることによるか
、または金属Ｓｒを１溶湯中に溶解せしめることにより
、Ｓｒ５〜５０ｗｔ％含有しかつ残部がＭｇおよび不可
避的不純物よりなるＳｒ−Ｍｇ合金とするのが最もを効
な方法といえるが、もちろん他の方法によって製造する
ことも可能である。The method for producing the Mg-5r alloy of the present invention includes adding Sr compounds such as strontium chloride and strontium fluoride to a molten Mg metal and reacting them, or dissolving metal Sr in one molten metal. It can be said that the most effective method is to produce an Sr--Mg alloy containing 5 to 50 wt% of Sr and the remainder consisting of Mg and unavoidable impurities, but it is of course possible to produce it by other methods.
この発明において、Ｓｒ含有量を５〜５０ｗｔ％と限定
した理由は次の通りである。すなわち、金属Ｍｇの融点
は６５０℃である。さて、含有させるＳｒの含有量が多
くなるに従い、−ｉには合金の融点は低下すると言われ
ている。ところが、Ｓｒが５０％を超えると融点は再び
高くなり、例えばＳｒ含有量が６４％では、ＭｇｔＳｒ
の金属間化合物が生成して、融点が６８０℃と高くなる
。このことから、Ｓｒ含有量は５〜５０１Ａｌｔ％の範
囲内であれば、融点を５９０〜６００℃と低くでき、Ａ
ｌ−Ｓｉ溶湯中へ速やかに溶解し、Ｓｒ歩留りも向上す
る。In this invention, the reason why the Sr content is limited to 5 to 50 wt% is as follows. That is, the melting point of metal Mg is 650°C. Now, it is said that as the Sr content increases, the melting point of the -i alloy decreases. However, when Sr exceeds 50%, the melting point increases again. For example, when Sr content is 64%, MgtSr
An intermetallic compound is formed, and the melting point becomes as high as 680°C. From this, if the Sr content is within the range of 5 to 501 Alt%, the melting point can be lowered to 590 to 600 °C, and the A
It quickly dissolves into the l-Si molten metal and improves the Sr yield.
これに対し、Ｓｒ含有量が５％以下では、Ａｌ−５ｔ溶
湯へのＭｇ−５ｒ合金の添加量が多くなりすぎて製造コ
ストを高騰させることとなる。また、Ｓｒ含有量が５０
％を超えるとＭｇ成分調整剤としての働きが不足し、ま
た、揮散などにより添加する際のＳｒ歩留りが低下する
ことや、この発明のＭｇ−５ｒ合金を製造するときに溶
湯の粘性が高くなり、スラグを噛み込んだＭｇ−５ｒ合
金を生成しゃす＜、ＡＩ −Ｓｉ熔湯中への不純物の混
合量が増加するために好ましくない。On the other hand, if the Sr content is 5% or less, the amount of Mg-5r alloy added to the Al-5t molten metal becomes too large, leading to an increase in manufacturing costs. In addition, the Sr content is 50
%, the function as an Mg component regulator will be insufficient, and the Sr yield will decrease when added due to volatilization, etc., and the viscosity of the molten metal will increase when producing the Mg-5r alloy of this invention. This is undesirable because a Mg-5r alloy containing slag is produced, which increases the amount of impurities mixed into the AI-Si molten metal.
なお、本発明のＭｇ−５ｒ合金は、ｌａｇ成分調整のた
め、さらに、いわゆる希釈剤としてＡｔを含有させたＭ
ｇ−５ｒ−Ａ１合金としてもよい。The Mg-5r alloy of the present invention further contains Mg containing At as a so-called diluent in order to adjust the lag component.
It may also be a g-5r-A1 alloy.
上述したＭｇ−５ｒ合金のＡＩ −５ｔ溶湯への添加に
際しては、予備処理炉の他、手元炉や取炉などにも添加
することができる。When adding the above-mentioned Mg-5r alloy to the AI-5t molten metal, it can be added to a hand furnace, a draft furnace, etc. in addition to the pretreatment furnace.
Ｃ実施例〕
ＪＩＳ ｉ格０）ＡＣ４ＣＨ合金溶湯４ ｋｇを、＃ｌ
ｏ黒鉛るつぼ中に投入し、７２０〜７５０℃の温度に加
熱して溶解し、ついで、このるつぼ中の合金溶湯をヘキ
サクロルエタンによる脱ガスおよびフラックスによる浄
化処理を施し、その後、この処理後のＡ Ｃ４ＣＨ５ｔ
溶湯中にこの発明にがかるＭｇ−５ｒ合金を、Ｓｒ純分
で０．０１５％になるように添加し、１５分間保持攪拌
後、７２０℃でＪＩＳ ｄ号試験片採取用金型（金型温
度１７０±１０℃）に製造した。Example C] JIS i rating 0) 4 kg of AC4CH alloy molten metal was
o The alloy is placed in a graphite crucible and heated to a temperature of 720 to 750°C to melt it, and then the molten alloy in this crucible is degassed with hexachloroethane and purified with flux. A C4CH5t
The Mg-5r alloy according to the present invention was added to the molten metal at a pure Sr content of 0.015%, held and stirred for 15 minutes, and heated to 720°C using a JIS No. d test piece sampling mold (mold temperature 170±10°C).
なお、比較のため、従来から使用されているＳｒ−Ｓｉ
−ＡＩ母合金、５ｒ−ＡＩ母合金についても同一の条件
により試験片を作製した。For comparison, the conventionally used Sr-Si
-AI mother alloy and 5r-AI mother alloy were also prepared into test pieces under the same conditions.
第１表に、上記各方法により製造したＪＩＳ ｄ号試験
片についての溶解性、Ｓｒ歩留りおよび機械的性質を示
した。Table 1 shows the solubility, Sr yield, and mechanical properties of the JIS No. d test pieces manufactured by each of the above methods.
第１表に示すところから判るように、本発明のＭｇ−５
ｒ合金は、Ａｌ−５ｒ、 Ａｌ−Ｓｉ−５ｒ合金よりも
格段と溶解時間が短縮されて作業性を向上することがで
き、Ｓｒ歩留りも良好である。また、機械的性質もなん
ら遜色を与えるところがない。As shown in Table 1, Mg-5 of the present invention
The r alloy has a much shorter melting time than the Al-5r and Al-Si-5r alloys, improving workability, and has a good Sr yield. Moreover, there is no inferiority in mechanical properties.
以上説明したように、この発明にがかるＭｇ−５ｒ合金
をＡｌ−Ｓｉ系合金に添加した場合、速やかに溶解する
のでＳｒ歩留りが良く、また、Ｍｇの揮散などによるロ
スが生じた場合でも、不足のＭｇを容易に補うことがで
きる。As explained above, when the Mg-5r alloy according to the present invention is added to an Al-Si alloy, it dissolves quickly, resulting in a high Sr yield. of Mg can be easily supplemented.
特許出願人 日本重化学工業株式会社 代理人 弁理士 小 川 順 三 同 弁理士 中 村 盛 夫Patent applicant: Japan Heavy and Chemical Industry Co., Ltd. Agent Patent Attorney Junzo Ogawa Patent attorney Morio Nakamura
Claims (1)
物よりなるＡｌ−Ｓｉ系鋳物合金改質用Ｍｇ−Ｓｒ合金
。1. A Mg-Sr alloy for modifying Al-Si based casting alloys consisting of 5 to 50 wt% Sr, the balance Mg and inevitable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16670088A JP2624302B2 (en) | 1988-07-06 | 1988-07-06 | Mg-Sr alloy for A1-Si casting alloy modification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16670088A JP2624302B2 (en) | 1988-07-06 | 1988-07-06 | Mg-Sr alloy for A1-Si casting alloy modification |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0219440A true JPH0219440A (en) | 1990-01-23 |
| JP2624302B2 JP2624302B2 (en) | 1997-06-25 |
Family
ID=15836129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16670088A Expired - Lifetime JP2624302B2 (en) | 1988-07-06 | 1988-07-06 | Mg-Sr alloy for A1-Si casting alloy modification |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2624302B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11951581B2 (en) | 2018-08-02 | 2024-04-09 | Kosmek Ltd. | Clamp system equipped with function for detecting behavior of object to be clamped |
-
1988
- 1988-07-06 JP JP16670088A patent/JP2624302B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11951581B2 (en) | 2018-08-02 | 2024-04-09 | Kosmek Ltd. | Clamp system equipped with function for detecting behavior of object to be clamped |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2624302B2 (en) | 1997-06-25 |
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