JPH0620635B2 - Manufacturing method of high silicon aluminum alloy castings - Google Patents
Manufacturing method of high silicon aluminum alloy castingsInfo
- Publication number
- JPH0620635B2 JPH0620635B2 JP8827985A JP8827985A JPH0620635B2 JP H0620635 B2 JPH0620635 B2 JP H0620635B2 JP 8827985 A JP8827985 A JP 8827985A JP 8827985 A JP8827985 A JP 8827985A JP H0620635 B2 JPH0620635 B2 JP H0620635B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- casting
- aluminum alloy
- temperature
- silicon aluminum
- 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 - Lifetime
Links
- 238000005266 casting Methods 0.000 title claims description 24
- 229910000838 Al alloy Inorganic materials 0.000 title claims description 12
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 title description 10
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 230000035699 permeability Effects 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 description 14
- 239000013078 crystal Substances 0.000 description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 10
- 239000010703 silicon Substances 0.000 description 10
- 239000010410 layer Substances 0.000 description 6
- 239000002344 surface layer Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 4
- 238000003287 bathing Methods 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 229910018594 Si-Cu Inorganic materials 0.000 description 2
- 229910008465 Si—Cu Inorganic materials 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000005495 investment casting Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、ハイシリコンアルミニウム合金鋳物の製造法
に関するものである。TECHNICAL FIELD The present invention relates to a method for producing a high silicon aluminum alloy casting.
（従来の技術） 従来、Siを13〜25重量％含有するハイシリコンアルミニ
ウム合金は耐摩耗性および低熱膨張性に優れており、こ
のようなハイシリコンアルミニウム合金は、鋳造品の種
類も多く各方面に多用されているけれども、これらの鋳
造品の多くは表面層および内部に初晶シリコンが晶出す
る。(Prior Art) Conventionally, high silicon aluminum alloys containing 13 to 25% by weight of Si are excellent in wear resistance and low thermal expansion, and such high silicon aluminum alloys have many types of cast products and are used in various fields. However, many of these castings have primary silicon crystallized in the surface layer and inside.
このため、初晶シリコンをなるべく晶出させないように
し、晶出しても後に切削する部分は微細な結晶となるよ
うな工夫がなされてきた。例えば鋳型の型温、鋳型剤の
層厚、溶湯充填速度、溶湯圧力などを調節して、この目
的を達成しているものがある。（特公昭58-49351号公
報） （発明が解決しようとする問題点） 本発明のハイシリコンアルミニウム合金鋳物の製造法
は、鋳造作業においてコントロールし易い条件で操業す
ることが現業で不良を無くすることに繋がり、作業効率
も向上するものであるとの観点から、現業の鋳造作業に
おいてコントロールし易い条件の溶湯の湯温と注湯時の
雰囲気圧力と鋳型型温とをコントロールして、従来のSi
を13〜25重量％含有するAl−Si系合金またはAl−Si−Cu
−Mg系合金もしくはAl−Si−Cu系合金のようなハイシリ
コンアルミニウム合金鋳物において見られる大型結晶の
初晶シリコンの晶出をコントロールして初晶シリコンの
晶出を極力少なくするか晶出しても微細なものにして、
しかも例えば鋳造品の切削が極めて少ない精密鋳造法で
実施されても鋳造性を損なうことなく、仮に切削をする
場合でもその後の切削工程を容易にするため微細な晶出
層をつくり、切削を必要とする部分の被切削性の良好な
ものを得ようとするものである。Therefore, attempts have been made to prevent primary crystal silicon from being crystallized as much as possible, and even if the crystal is crystallized, the portion to be cut later becomes a fine crystal. For example, there are those that achieve this object by adjusting the mold temperature, the layer thickness of the mold agent, the molten metal filling speed, the molten metal pressure, and the like. (Japanese Patent Publication No. Sho 58-49351) (Problems to be solved by the invention) In the method for producing a high silicon aluminum alloy casting according to the present invention, operating under conditions that are easy to control in the casting work eliminates defects in the actual operation. From the viewpoint of improving work efficiency, it is possible to control the molten metal temperature, the atmospheric pressure during pouring, and the mold temperature, which are conditions that are easy to control in the current casting work, from the viewpoint of improving work efficiency. Si
Al-Si alloy or Al-Si-Cu containing 13 to 25 wt%
-Crystallization of primary crystal silicon is controlled as much as possible by controlling the crystallization of large-scale primary crystal silicon found in high silicon aluminum alloy castings such as -Mg alloy or Al-Si-Cu alloy. Also make fine,
Moreover, for example, even if the casting is carried out by a precision casting method in which cutting is extremely small, it does not impair the castability, and even if it is cut, a fine crystallized layer is formed to facilitate the subsequent cutting process, and cutting is required. It is intended to obtain a part having good machinability in the part.
（発明の構成） （問題点を解決するための手段） 本発明のハイシリコンアルミニウム合金鋳物の製造法
は、Siを13〜25重量％含有するハイシリコンアルミニウ
ム合金の湯温が 770〜 900℃の溶湯を、減圧して 710〜
600mmHgの圧力とした箱枠内に準備された型温が50〜 2
00℃の通気性のある鋳型に注湯することを必須の構成と
するものである。(Structure of the Invention) (Means for Solving the Problems) The method for producing a high silicon aluminum alloy casting according to the present invention has a hot water temperature of 770 to 900 ° C. of a high silicon aluminum alloy containing 13 to 25% by weight of Si. Depressurize molten metal 710-
The mold temperature prepared in the box frame with the pressure of 600 mmHg is 50 ~ 2
It is indispensable to pour molten metal into a mold with air permeability of 00 ℃.
（作用） 注湯温度は高い方が湯ながれが良いけれども注湯温度が
高いと酸化が進行し易く、ガス吸収も激しいため、注湯
温度は 900℃までにしなければならない。注湯温度が低
くなると湯まわりが悪くなるから、鋳型を減圧して湯ま
わりを良くするが、減圧しても鋳型の細部には湯がまわ
らないから注湯温度は 770℃が限度である。(Function) The higher the pouring temperature is, the better the flow of hot water is. However, if the pouring temperature is high, the oxidation is likely to proceed and the gas absorption is severe. Therefore, the pouring temperature must be up to 900 ° C. When the pouring temperature becomes low, the bathing temperature deteriorates. Therefore, the mold is depressurized to improve the bathing temperature.
減圧の程度は 710mmHg以下に減圧しないと鋳型内の細部
にまで湯がまわらない。しかし 600mmHgを越えるほど減
圧すると、注湯の際、湯が鋳型を抜けでるおそれが高
い。Unless the pressure is reduced to less than 710 mmHg, the hot water does not reach the details in the mold. However, if the pressure is reduced to more than 600 mmHg, there is a high possibility that the molten metal will escape from the mold during pouring.
鋳造は溶融金属を冷却するのであるから型温は低いほう
が良いわけであるが、50℃に達しないものでは湯まわり
が悪くなる。 200℃を越えると冷却が遅くなり初晶シリ
コンの結晶粒が大となる。鋳型の表面に水分があると鋳
物のガス欠陥の原因となる。Since casting cools the molten metal, it is better that the mold temperature is lower, but if the temperature does not reach 50 ° C, the bathing area will deteriorate. If the temperature exceeds 200 ° C, cooling will be slow and the crystal grains of primary crystal silicon will become large. Moisture on the surface of the mold causes gas defects in the casting.
（実施例） 実施例１ Cu 1.13 ％，Si 21.4 ％，Mg 0.79 ％，Fe 0.26 ％，Mn
0.01 ％，Ni 2.23 ％，残部Alの合金を770 ℃の温度に
溶解し、 710mmHgの圧力にまで減圧した箱枠内に準備し
た型温が50℃の通気性のある鋳型に注湯した。(Example) Example 1 Cu 1.13%, Si 21.4%, Mg 0.79%, Fe 0.26%, Mn
An alloy of 0.01%, Ni 2.23%, and the balance Al was melted at a temperature of 770 ° C, and was poured into a prepared air-permeable mold with a mold temperature of 50 ° C in a box frame depressurized to 710 mmHg.
直径 3mmの鋳型部分にまで湯がまわり、鋳物表層の初晶
シリコンが少なく微細ある層の厚さは加工に適度の厚さ
で被切削性も良好であった。The molten metal spread to the mold portion with a diameter of 3 mm, and the thickness of the layer with a small amount of primary crystal silicon in the surface layer of the casting was suitable for processing and the machinability was good.
実施例２ Cu 1.13 ％，Si 21.4 ％，Mg 0.79 ％，Fe 0.26 ％，Mn
0.01 ％，Ni 2.23 ％，残部Alの合金を770 ℃の温度
に溶解し、 710mmHgの圧力にまで減圧した箱枠内に準備
した型温が 200℃の通気性のある鋳型に注湯した。Example 2 Cu 1.13%, Si 21.4%, Mg 0.79%, Fe 0.26%, Mn
An alloy of 0.01%, Ni 2.23%, and the balance Al was melted at a temperature of 770 ° C, and was poured into a prepared air-permeable mold with a mold temperature of 200 ° C in a box frame depressurized to a pressure of 710 mmHg.
初晶の大きさは40〜50μｍで鋳物の硬度はHB 130であ
り、鋳型の細部にまで湯がまわり、鋳物表層の初晶シリ
コンが少なく微細である層の厚さは加工に適度の厚さで
被切削性も良好であった。The size of the primary crystal is 40 to 50 μm, the hardness of the casting is HB 130, the hot water flows to the details of the mold, the primary surface silicon of the casting is little and the layer is fine The machinability was also good.
実施例３ Cu 1.13 ％，Si 21.4 ％，Mg 0.79 ％，Fe 0.26 ％，Mn
0.01 ％，Ni 2.23 ％，残部Alの合金を840 ℃の温度に
溶解し、 710mmHgの圧力にまで減圧した箱枠内に準備し
た型温が50℃の通気性のある鋳型に注湯した。Example 3 Cu 1.13%, Si 21.4%, Mg 0.79%, Fe 0.26%, Mn
An alloy of 0.01%, Ni 2.23% and the balance Al was melted at a temperature of 840 ° C, and was poured into a prepared air-permeable mold with a mold temperature of 50 ° C in a box frame depressurized to a pressure of 710 mmHg.
初晶の大きさは50〜60μｍで鋳物の硬度はHB 130であ
り、鋳型の細部にまで湯がまわり、鋳物表層の初晶シリ
コンが少なく微細である層の厚さは加工に適度の厚さで
被切削性も良好であった。The size of the primary crystal is 50 to 60 μm, the hardness of the casting is HB 130, the hot water flows to the details of the mold, and the surface layer of the casting has a small amount of primary crystal silicon and the layer is fine enough for processing. The machinability was also good.
実施例４ Cu 1.13 ％，Si 21.4 ％，Mg 0.79 ％，Fe 0.26 ％，Mn
0.01 ％，Ni 2.23 ％，残部Alの合金を770 ℃の温度に
溶解し、 600mmHgの圧力にまで減圧した箱枠内に準備し
た型温が50℃の通気性のある鋳型に注湯した。Example 4 Cu 1.13%, Si 21.4%, Mg 0.79%, Fe 0.26%, Mn
An alloy of 0.01%, Ni 2.23% and the balance Al was melted at a temperature of 770 ° C, and was poured into a prepared air-permeable mold having a mold temperature of 50 ° C in a box frame depressurized to 600 mmHg.
初晶の大きさは40〜50μｍで鋳物の硬度はHB 130であ
り、直径 2mmの鋳型の細部にまで湯がまわり、鋳物表層
の初晶シリコンが少なく微細である層の厚さは加工に適
度の厚さで被切削性も良好であった。The size of the primary crystal is 40 to 50 μm, the hardness of the casting is HB 130, and the hot water flows to the details of the mold with a diameter of 2 mm, and the surface layer of the casting has a small amount of primary silicon and the layer thickness is appropriate for processing. And the machinability was also good.
（発明の効果） 本発明のハイシリコンアルミニウム合金鋳物の製造法
は、鋳造作業で調整し易い条件で操業できて作業効率も
向上し、ハイシリコンアルミニウム合金鋳物の初晶シリ
コンの晶出が鋳物表層には少なく微細であり、そのため
この切削をしなければならない鋳物表層の被切削性を向
上させることができるという良好な結果を得ることがで
きたもので、本発明は産業の発達に寄与するところ極め
て大なるものがある。(Effect of the invention) The method for producing a high silicon aluminum alloy casting of the present invention can be operated under conditions that are easy to adjust in the casting operation, and the work efficiency is improved, and the crystallization of primary crystal silicon of the high silicon aluminum alloy casting is the surface layer of the casting. It is possible to obtain good results that it is possible to improve the machinability of the casting surface layer that has to be cut because of the small number of fine particles, and the present invention contributes to the development of industry. There is an extremely large one.
Claims (1)
ルミニウム合金の湯温が 770〜 900℃の溶湯を、減圧し
て 710〜 600mmHgの圧力とした箱枠内に準備された型温
が 50 〜 200℃の通気性のある鋳型に注湯することを特
徴とするハイシリコンアルミニウム合金鋳物の製造法。1. A high-silicon aluminum alloy containing 13 to 25% by weight of Si having a molten metal temperature of 770 to 900 ° C. is decompressed to a pressure of 710 to 600 mmHg. A method for producing a high-silicon aluminum alloy casting, which comprises pouring the molten metal into a mold having air permeability of 50 to 200 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8827985A JPH0620635B2 (en) | 1985-04-24 | 1985-04-24 | Manufacturing method of high silicon aluminum alloy castings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8827985A JPH0620635B2 (en) | 1985-04-24 | 1985-04-24 | Manufacturing method of high silicon aluminum alloy castings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61245954A JPS61245954A (en) | 1986-11-01 |
| JPH0620635B2 true JPH0620635B2 (en) | 1994-03-23 |
Family
ID=13938461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8827985A Expired - Lifetime JPH0620635B2 (en) | 1985-04-24 | 1985-04-24 | Manufacturing method of high silicon aluminum alloy castings |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0620635B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5849351B2 (en) | 2010-02-18 | 2016-01-27 | アンパック システム サイエンス（シャンハイ）カンパニー リミテッド | Microdevice manufacturing method |
-
1985
- 1985-04-24 JP JP8827985A patent/JPH0620635B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5849351B2 (en) | 2010-02-18 | 2016-01-27 | アンパック システム サイエンス（シャンハイ）カンパニー リミテッド | Microdevice manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61245954A (en) | 1986-11-01 |
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