JPS61186431A - Manufacture of al-si alloy - Google Patents
Manufacture of al-si alloyInfo
- Publication number
- JPS61186431A JPS61186431A JP2504385A JP2504385A JPS61186431A JP S61186431 A JPS61186431 A JP S61186431A JP 2504385 A JP2504385 A JP 2504385A JP 2504385 A JP2504385 A JP 2504385A JP S61186431 A JPS61186431 A JP S61186431A
- Authority
- JP
- Japan
- Prior art keywords
- casting
- alloy
- mold
- molten
- added
- 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.)
- Pending
Links
Abstract
Description
【発明の詳細な説明】
共晶及び亜共晶Ａ ｌ −Ｓ ｉ系合金の８１晶組織微
細化改良に対して、従来のＮａ添加よりＳｒ添加の方が
１作業性２歩留り、効果の持続性、コスト等全ての面で
有利であることが種々報告されている。[Detailed Description of the Invention] For the refinement of the 81 crystal structure of eutectic and hypoeutectic Al-Si alloys, Sr addition has a higher workability, 2 yields, and a longer-lasting effect than the conventional Na addition. Various reports have been made that this method is advantageous in all aspects such as performance and cost.
ＡＡ’は一般に電気、ガス等で溶解、脱ガス処理を行な
った後、保持炉で保持し、保持炉より、ストーク、とり
べ、杓等を使用して鋳型に注湯される。AA' is generally melted and degassed using electricity, gas, etc., then held in a holding furnace, and poured from the holding furnace into a mold using a stalk, ladle, ladle, etc.
しかしながらＳｒ添加ＡＪ鋳物は、脱ガス処理を行なっ
てもＳｒ無添加ＡＩ鋳物より気孔が発生し易い特性があ
る。However, Sr-added AJ castings have a characteristic that pores are more likely to occur than Sr-free AI castings even after degassing treatment.
この原因は明確でないが、溶湯中のＳｒが酸化して、こ
の酸化物が溶湯中のＨを吸着してＨ２を発生するためか
、あるいは、脱ガス処理後、炉で保持中又はとりべ杓等
で運搬、移しかえ中に、炉、ストーク、鋳造機、とりぺ
、杓等の耐火材料及び大気中より導入された水蒸気、結
晶水等がＳｒ存在下で分解して、 Ｈ２を発生し易い
ことに起因するものと推定され、その結果Ｓｒ添加Ａｌ
鋳物がＳｒ無添加Ａ／鋳物より気孔を発生し易いものと
考えられる。The cause of this is not clear, but it may be because Sr in the molten metal oxidizes and this oxide adsorbs H in the molten metal to generate H2, or it may be because Sr in the molten metal is oxidized and this oxide adsorbs H in the molten metal and generates H2. During transportation and transfer, water vapor, crystal water, etc. introduced from the atmosphere and refractory materials such as furnaces, stalks, casting machines, bowls, and ladles are likely to decompose in the presence of Sr and generate H2. As a result, Sr-added Al
It is thought that the casting is more likely to generate pores than the Sr-free A/casting.
シλ
本発明は、特に低圧鋳造入とそれに類似する鋳造法にお
見・て、鋳物の気孔を増加することなしに。The present invention is particularly suitable for low-pressure casting and similar casting methods, without increasing the porosity of the casting.
Ｓｒ添加により、Ｓｔ晶機微細化改良処理行なう場合の
Ｓｒ合金添加による共晶及び亜共晶Ａｌ−８ｔ系合金の
製造方法に関するものである。The present invention relates to a method for producing eutectic and hypoeutectic Al-8t alloys by adding Sr alloy in the case of performing St crystal grain refinement improvement treatment by adding Sr.
ＳｒによるＳｉ晶機微細化改良通常人ｌ−１４Ｓｉ−１
０Ｓｒ又はＡ ｌ−１０Ｓｉ母合金を所定量（一般にＳ
ｒ Ｏ，００５〜０．１０ｗｔ％）Ａｌ溶湯中へ溶かす
だけで良いが、これを溶解炉あるいは保持炉中の溶湯へ
溶かした場合前述の如く鋳物の気孔が漸増する。Refinement of Si crystal machine improved by Sr Ordinary person l-14Si-1
A predetermined amount of 0Sr or Al-10Si master alloy (generally S
r O, 005 to 0.10 wt%) It is sufficient to simply melt it into molten Al, but when it is melted into molten metal in a melting furnace or holding furnace, the pores of the casting gradually increase as described above.
本発明は、この様な欠点を除くため、低圧鋳造味あるい
はそれに類似する鋳造において、Ｓｒを溶解炉又は保持
炉の溶湯全体に添加するのでな（。In order to eliminate such drawbacks, the present invention adds Sr to the entire molten metal in a melting furnace or holding furnace during low-pressure casting or similar casting.
鋳型の湯口部より鋳造品１個分の溶湯に必要な量のＳｒ
母合金を添加する。すなわち注湯に必要な最小限の溶湯
にだけＳｒを含有させることによって気孔の発生を防止
することを特徴とする。The amount of Sr required for molten metal for one casting from the sprue of the mold
Add master alloy. That is, it is characterized in that the generation of pores is prevented by containing Sr only in the minimum amount of molten metal required for pouring.
以下に実施例を示す。Examples are shown below.
第１図に示すように低圧鋳造装置は耐火レンガ及びキャ
スタブル耐火物で築炉された保持炉１．保持炉１から上
方へ延びたストーク２を有している。As shown in Fig. 1, the low-pressure casting equipment consists of a holding furnace made of firebrick and castable refractories. It has a stalk 2 extending upward from the holding furnace 1.
保持炉１はＡｌ−１０Ｓｉ合金の溶湯を保持している。The holding furnace 1 holds molten Al-10Si alloy.
そして、鋳型乙の下型４をまずストーク２の上端にセッ
トし９次に下型４の湯口５からＳｒを一回の鋳込み重量
のｏ、 ｏ ｏ ｓ〜０．０５チストーク２内の溶湯に
添加する。次に、上型６をすみやかに下型４の上に載置
固定して注口５から溶湯を鋳型３内へ注入する。Then, the lower mold 4 of the mold B is first set on the upper end of the stoke 2, and then Sr is poured into the molten metal in the stoke 2 from the sprue 5 of the lower mold 4 at one casting weight of o, o o s ~ 0.05. Added. Next, the upper mold 6 is quickly placed and fixed on the lower mold 4, and the molten metal is poured into the mold 3 from the spout 5.
第２図に鋳物の気孔状況を従来法との対比で示す。Figure 2 shows the state of pores in castings in comparison with the conventional method.
第２図（、）は従来法で保持炉の溶湯全体に、Ｓｒを０
、０５ ％添加したときの添加直後のまた第２図（ｂｌ
は、鋳造作業開始ＪＨｒ後のそれぞれ溶湯を８０ｍｍＨ
Ｈの減圧状態で凝−・させた鋳物断面の気孔発生状況を
示す。Figure 2 (,) shows that zero Sr was added to the entire molten metal in the holding furnace using the conventional method.
, 05% and immediately after addition (bl
The molten metal was heated to 80mmH after the start of casting work JHr.
This figure shows the state of pore generation in a cross section of a casting solidified under reduced pressure of H.
、第２図（ｃ）は本発明の方法、すなわち湯口■よりＳ
ｒ合金を鋳造１回毎に添加した場合での鋳造作業開始４
Ｈｒ後の上記と同様の状態における減圧凝固鋳物断面の
気孔発生状況である。表１に従来法と本発明の方法で鋳
造したシリンダーヘッド気孔率の比較を示す。, FIG. 2(c) shows the method of the present invention, that is, from sprue ■ to S
Starting casting work when r-alloy is added for each casting 4
This is the state of pore generation in the cross section of the vacuum solidified casting in the same state as above after hours. Table 1 shows a comparison of the porosity of cylinder heads cast by the conventional method and the method of the present invention.
表１
第６図（ａ）はＳｒ改良処理を行なわない従来のシリン
ダーヘッドの顕微鏡組織、第３図（ｂ）は本発明の方法
で鋳造したシリンダーヘッドの組織を示す。Table 1 FIG. 6(a) shows the microscopic structure of a conventional cylinder head without Sr improvement treatment, and FIG. 3(b) shows the structure of a cylinder head cast by the method of the present invention.
以上から明らかなように本発明方法では気孔発生が常に
一定以下に維持されるものである。As is clear from the above, in the method of the present invention, the generation of pores is always maintained below a certain level.
なお、Ｓｒの添加量は鋳込み重量のｏ、 ｏ ｏ ｓ〜
０、０５ ％の範囲が好ましく、ｏ、ｏｏｓ％未満では
Ｓｉ品機微細化効果がなく、ｏ、ｏｓｓを越えて加えて
も効果がなく、また気孔を発生しやすくなる以上から明
らかなよ５に本発明方法では気孔発生が常に一定以下に
維持されるものである。In addition, the amount of Sr added is o, o o s~ of the casting weight.
A range of 0.05% is preferable, and if it is less than o.oos%, there is no effect on making Si products finer, and if it is added in excess of o.oss, there is no effect, and it is clear from the above that pores are likely to be generated. In the method of the present invention, the generation of pores is always maintained below a certain level.
なお、Ｓｒの添加量は鋳込み重量のＱ、 ＯＯ５〜０、
０５ ％の範囲が好ましく、ｏ、ｏｏｓ％未満ではＳｔ
晶機微細化効果がなく、０．０５％を越えて加えても効
果がなく、また気孔を発生しやすくなる傾向が大きくな
る。Note that the amount of Sr added is determined by the casting weight Q, OO5~0,
The range of 0.05% is preferable, and if it is less than o, oos%, St
It has no crystal grain refinement effect, and even if added in excess of 0.05%, there is no effect, and there is a greater tendency for pores to be generated.
第１図は本発明の実施例を示す断面図、第２図は従来お
よび本発明の方法より得られた鋳造合金の気孔状態を示
す写真、第３図は従来および本発明の方法により得られ
た鋳造合金の顕微鏡組織を示す写真である。
１：保持炉、２ニストーク、３：鋳型
ｆｊ２、？ｌχ１
窮
、０：パ
ン
′や
゛しゞ゛
パり、
”゛占＼
試 ｒ
２゛゛
゛ ＼ゝ
″ ミ
φ ・匁
＼。
どべ
１１、。
ξ″＋ 、
３ 図
′炒＼
ミ゛１、ネ
〆・
’：ｔｉ’
・・（
俣
ゝ、
゛：二Fig. 1 is a cross-sectional view showing an example of the present invention, Fig. 2 is a photograph showing the pore state of cast alloys obtained by the conventional method and the method of the present invention, and Fig. 3 is a photograph showing the pore state of the cast alloy obtained by the conventional method and the method of the present invention. 1 is a photograph showing the microscopic structure of a cast alloy. 1: Holding furnace, 2 Nistoke, 3: Mold fj2, ? lχ1 Kang, 0: Pan'ya゛shidi゛pari, ``゛Divination\ test r 2゛゛゛ \ゝ'' Miφ・Mom\. Dobe 11. ξ″+ , 3 Figure'fry＼ mi゛1, ne〆・':ti'...(mataゝ, ゛:2
Claims (2)
回の鋳型への注入部分にＳｒを添加し、ただちに鋳型へ
Ｓｒを含有した溶湯を注入することを特徴とするＡｌ−
Ｓｉ系合金の製造方法(1) Form a molten Al-Si alloy, and
Al-
Manufacturing method of Si-based alloy
を保持し、上記保持炉から上方へ延びるストーク上に下
型をセットし、下型の湯口から１回の鋳造に必要なＳｒ
を溶湯に添加し、上型を上記下型にセットして、上記上
下型からなる鋳型内に溶湯を注入し鋳造することを特徴
とするＡｌ−Ｓｉ系合金の製造方法(2) Hold the molten Al-Si alloy in the holding furnace of the low-pressure casting equipment, set the lower mold on the stalk extending upward from the holding furnace, and release the Sr required for one casting from the sprue of the lower mold.
is added to the molten metal, an upper mold is set in the lower mold, and the molten metal is poured into the mold consisting of the upper and lower molds for casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2504385A JPS61186431A (en) | 1985-02-12 | 1985-02-12 | Manufacture of al-si alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2504385A JPS61186431A (en) | 1985-02-12 | 1985-02-12 | Manufacture of al-si alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61186431A true JPS61186431A (en) | 1986-08-20 |
Family
ID=12154886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2504385A Pending JPS61186431A (en) | 1985-02-12 | 1985-02-12 | Manufacture of al-si alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61186431A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63188449A (en) * | 1987-01-30 | 1988-08-04 | Japan Metals & Chem Co Ltd | Method for adjusting molten al alloy for die casting |
| CN104762537A (en) * | 2015-04-09 | 2015-07-08 | 芜湖永裕汽车工业有限公司 | Preparation technique of aluminum-strontium alloy modifier for casting aluminum-silicon alloy |
-
1985
- 1985-02-12 JP JP2504385A patent/JPS61186431A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63188449A (en) * | 1987-01-30 | 1988-08-04 | Japan Metals & Chem Co Ltd | Method for adjusting molten al alloy for die casting |
| CN104762537A (en) * | 2015-04-09 | 2015-07-08 | 芜湖永裕汽车工业有限公司 | Preparation technique of aluminum-strontium alloy modifier for casting aluminum-silicon alloy |
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