CH148194A - Bearing metal. - Google Patents
Bearing metal.Info
- Publication number
- CH148194A CH148194A CH148194DA CH148194A CH 148194 A CH148194 A CH 148194A CH 148194D A CH148194D A CH 148194DA CH 148194 A CH148194 A CH 148194A
- Authority
- CH
- Switzerland
- Prior art keywords
- bearing metal
- tin
- copper
- silicon
- alloys
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/04—Alloys based on copper with zinc as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Sliding-Contact Bearings (AREA)
- Mold Materials And Core Materials (AREA)
- Continuous Casting (AREA)
Description
Lagermetall. Den Gegenstand der Erfindung bildet ein Lagermetall, welches Zink, 65 bis 80 % Kupfer und 2 bis 6 % Silizium enthält.
Zur Herstellung von Lagern werden bisher fast ausschliesslich solche Legierungen ver wendet, deren Gefüge ganz bestimmten Vor schriften entspricht. Man verlangt von einer derartigen Legierung, dass sie aus verschieden harten Kristallkörpern bestehe. In einer weichen Grundmasse sollen härtere Kristallkörper eingelagert sein, welche in der Hauptsache die Welle tragen. Eine derartige Anordnung des Gefüges hat den Vorteil, dass bei Versagen der Schmierung ein Festsetzen der Welle nicht eo leicht eintritt wie bei homogenen lietallen.
Als wichtigste Vertreterin derartiger Lager- :netalle gilt die Kupfer-Zinn-Bronce mit einem Zinngehalt bis zu etwa 25 %. Bei derartigen Legierungen befindet sich im Gefüge ein Gemenge von harten 8-Kristallen, die in weiche a-1M' ischkristalle eingebettet sind.
Bei den sogenannten Weissmetallen, die aus Kupfer- Antimon-Zinnlegierungen bestehen, werden die "harten Kristalle durch eine Verbindung von Antimon-Zinn und Antimon-Kupfer ge bildet, die in dem zinnreichen Eutektikuin eingelagert sind. Beide Legierungen sind in folge des hohen Zinngehaltes sehr teuer, so dass man versucht hat, das Zinn durch billigere Metalle zu ersetzen. Die auf diese Weise erhaltenen 'Legierungen verfügen nur über eine geringe Festigkeit und sind deswegen starken Beanspruchungen nicht gewachsen.
Das Lagermetall gemäss der Erfindung bedeutet gegenüber den bekannten Lagerme tallen einen Fortschritt. Zweckmässig wählt man den Siliziumgehalt derart, dass sich eine hoch siliziumhaltige Kristallart bildet. Diese Kristallart besitzt im Vergleich zum übrigen Gefüge eine hohe Härte und befindet sich in ähnlicher Weise verteilt wie die d-Kristalle in den Kupfer-Zinnlegierungen. Um eine solche Legierung zu erhalten, genügen bei etwa 65 bis 75 % Kupfer, 2 bis 3 % Silizium,
bei mehr Kupfer etwa 3 bis 4-% Silizium, falls die Bildung eines für die Verwendung als Lagermetall besonders geeigneten Gefüges durch einen geringen Zinnzusatz in den Grenzen 0,1 bis 3/o begünstigt wird.
So enthält beispielsweise eine besonders günstige Legierung 75% Cu, 20% Zn, 3 % Si und 1% Sc). Die Legierung wird in bekannter Weise durch Zusammenschmelzen hergestellt.
Bearing metal. The subject of the invention is a bearing metal which contains zinc, 65 to 80% copper and 2 to 6% silicon.
To date, alloys whose structure corresponds to very specific regulations have been used almost exclusively for the manufacture of bearings. Such an alloy is required to consist of crystal bodies of different hardness. Harder crystal bodies should be embedded in a soft base material, which mainly carry the shaft. Such an arrangement of the structure has the advantage that if the lubrication fails, it is not easy for the shaft to seize as it does with homogeneous steel.
The most important representative of such storage metals is the copper-tin-bronze with a tin content of up to about 25%. In such alloys there is a mixture of hard 8-crystals in the structure, which are embedded in soft a-1M 'isch crystals.
In the so-called white metals, which consist of copper-antimony-tin alloys, the "hard crystals are formed by a combination of antimony-tin and antimony-copper, which are embedded in the tin-rich eutectic. Both alloys are very high as a result of their high tin content expensive, so that attempts have been made to replace the tin with cheaper metals.
The bearing metal according to the invention means progress over the known Lagerme talls. The silicon content is expediently selected in such a way that a type of crystal with a high silicon content is formed. This type of crystal has a high hardness compared to the rest of the structure and is distributed in a similar way to the d-crystals in the copper-tin alloys. To obtain such an alloy, about 65 to 75% copper, 2 to 3% silicon,
with more copper about 3 to 4% silicon, if the formation of a structure particularly suitable for use as a bearing metal is promoted by a small addition of tin within the limits 0.1 to 3 / o.
For example, a particularly favorable alloy contains 75% Cu, 20% Zn, 3% Si and 1% Sc). The alloy is produced in a known manner by melting it together.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE698778X | 1930-02-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH148194A true CH148194A (en) | 1931-07-15 |
Family
ID=6608243
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH148199D CH148199A (en) | 1930-02-13 | 1930-06-25 | Process for the production of sand castings from copper-silicon-zinc alloys. |
CH148194D CH148194A (en) | 1930-02-13 | 1930-06-25 | Bearing metal. |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH148199D CH148199A (en) | 1930-02-13 | 1930-06-25 | Process for the production of sand castings from copper-silicon-zinc alloys. |
Country Status (3)
Country | Link |
---|---|
CH (2) | CH148199A (en) |
FR (2) | FR698776A (en) |
GB (2) | GB352639A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE764372C (en) * | 1940-04-07 | 1952-09-29 | Eugen Dr Vaders | Copper-zinc alloy |
US3773504A (en) * | 1970-12-28 | 1973-11-20 | I Niimi | Copper base alloy having wear resistance at high temperatures |
US8506730B2 (en) | 1998-10-09 | 2013-08-13 | Mitsubishi Shindoh Co., Ltd. | Copper/zinc alloys having low levels of lead and good machinability |
US7056396B2 (en) | 1998-10-09 | 2006-06-06 | Sambo Copper Alloy Co., Ltd. | Copper/zinc alloys having low levels of lead and good machinability |
JP3734372B2 (en) * | 1998-10-12 | 2006-01-11 | 三宝伸銅工業株式会社 | Lead-free free-cutting copper alloy |
EP1929057B1 (en) | 2005-09-22 | 2012-05-09 | Mitsubishi Shindoh Co., Ltd. | Free-cutting copper alloy containing very low lead |
-
1930
- 1930-05-19 GB GB15321/30A patent/GB352639A/en not_active Expired
- 1930-06-25 CH CH148199D patent/CH148199A/en unknown
- 1930-06-25 CH CH148194D patent/CH148194A/en unknown
- 1930-07-09 FR FR698776D patent/FR698776A/en not_active Expired
- 1930-07-09 FR FR698778D patent/FR698778A/en not_active Expired
-
1931
- 1931-05-19 GB GB11904/31A patent/GB359570A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR698776A (en) | 1931-02-05 |
FR698778A (en) | 1931-02-05 |
CH148199A (en) | 1931-07-15 |
GB359570A (en) | 1931-10-19 |
GB352639A (en) | 1931-07-16 |
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