CH112246A - Aluminum alloy for engine pistons. - Google Patents
Aluminum alloy for engine pistons.Info
- Publication number
- CH112246A CH112246A CH112246DA CH112246A CH 112246 A CH112246 A CH 112246A CH 112246D A CH112246D A CH 112246DA CH 112246 A CH112246 A CH 112246A
- Authority
- CH
- Switzerland
- Prior art keywords
- aluminum alloy
- engine pistons
- alloy
- alloys
- pistons
- Prior art date
Links
- 229910000838 Al alloy Inorganic materials 0.000 title claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 238000005496 tempering Methods 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 230000003111 delayed effect Effects 0.000 claims 1
- 238000007373 indentation Methods 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- -1 aluminum-copper-iron Chemical compound 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
Aluminiumlegierung für Notorkolbeu. Als Baustoff für Kolben von Verbren nungsmotoren nehmen die Aluminiumlegie rungen infolge ihres geringen spezifischen Gewichtes und ihrer hohen Wärmeleitfähig keit einen bevorzugten Platz ein. Am besten bewährten sich bisher solche Legierungen, die neben guten Festigkeitseigenschaften eine Kugeldruckhärte von mindestens 100 bis 120 kg/mm' aufwiesen. Die Erfahrung zeigte aber, dass die bisher im Kolbenbau verwen deten Aluminiumlegierungen, die obigen An forderungen im ungebrauchten Zustande ge nügten, im Betriebe infolge Anlasswirkung allmählich erweichten, sowie bisweilen blei bende Formveränderungen aufwiesen und da durch in relativ kurzer Zeit unbrauchbar wurden.
Die vorliegende Erfindung betrifft nun eine Aluminiumlegierung für Motorkolben, die auch im angelassenen Zustande noch ge nügende Kugeldruckhärte aufweist. Solche Legierungen werden erhalten, indem man Aluminium-Kupfer-Eisen-Legierungen mit 8 bis 17 % Kupfer und 1 bis 8 % Eisen meh rere, Härtung bedingende Legierungskompo- nenten, wie Magnesium, Mangan etc.; in Mengen bis zu 2 / zusetzt. Die gegossenen Kolben werden zweckmässig nach dem Guss einer Anlassbehandlung bei Temperaturen un terhalb<B>350'</B> C unterworfen. Der gleiche Effekt kann auch durch eine absichtlich stark verzögerte Abkühlung erzielt werden.
Dies kann beispielsweise dadurch erreicht werden, dass die den Kokillen entnommenen zirka<B>500'</B> C warmen Gussstücke in einem gut wärmeisolierten Behälter langsamer Ab kühlung überlassen werden. Durch diese Be handlung werden die Legierungen in den bei niedrigen Temperaturen stabilen Gefüge zustand übergeführt, so dass bei den in Be tracht kommenden Betriebstemperaturen we der Härte- noch bleibende Formänderungen zu befürchten sind.
Aluminum alloy for Notorkolbeu. As a building material for pistons in internal combustion engines, aluminum alloys occupy a preferred position due to their low specific weight and high thermal conductivity. So far, the best alloys have proven to be those which, in addition to good strength properties, have an indentation hardness of at least 100 to 120 kg / mm '. Experience has shown, however, that the aluminum alloys previously used in piston construction that met the above requirements when they were not in use, gradually softened in operation as a result of the tempering effect, and sometimes showed permanent changes in shape and therefore became unusable in a relatively short time.
The present invention relates to an aluminum alloy for engine pistons, which still has sufficient ball indentation hardness even in the tempered state. Such alloys are obtained by using aluminum-copper-iron alloys with 8 to 17% copper and 1 to 8% iron several alloy components that require hardening, such as magnesium, manganese etc .; in amounts up to 2 / added. After casting, the cast pistons are expediently subjected to a tempering treatment at temperatures below <B> 350 '</B> C. The same effect can also be achieved by deliberately delaying the cooling.
This can be achieved, for example, in that the cast pieces with a temperature of about 500 ° C that have been removed from the molds are left to cool slowly in a well-insulated container. As a result of this treatment, the alloys are converted into a structure that is stable at low temperatures, so that neither hardness nor permanent changes in shape are to be feared at the operating temperatures in question.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH112246T | 1924-09-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH112246A true CH112246A (en) | 1925-10-16 |
Family
ID=4371317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH112246D CH112246A (en) | 1924-09-25 | 1924-09-25 | Aluminum alloy for engine pistons. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH112246A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE971725C (en) * | 1951-07-24 | 1959-03-19 | Fischer Ag Georg | Process for surface treatment of light metal workpieces by means of irradiation through centrifuged, materially similar metal shot or gravel |
-
1924
- 1924-09-25 CH CH112246D patent/CH112246A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE971725C (en) * | 1951-07-24 | 1959-03-19 | Fischer Ag Georg | Process for surface treatment of light metal workpieces by means of irradiation through centrifuged, materially similar metal shot or gravel |
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