EP0042455B1 - Alliages à base de cuivre, contenant de l'aluminium et du cobalt et présentant une bonne résistance à l'usure; procédé pour la fabrication de ces alliages - Google Patents

Alliages à base de cuivre, contenant de l'aluminium et du cobalt et présentant une bonne résistance à l'usure; procédé pour la fabrication de ces alliages Download PDF

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Publication number
EP0042455B1
EP0042455B1 EP19800104147 EP80104147A EP0042455B1 EP 0042455 B1 EP0042455 B1 EP 0042455B1 EP 19800104147 EP19800104147 EP 19800104147 EP 80104147 A EP80104147 A EP 80104147A EP 0042455 B1 EP0042455 B1 EP 0042455B1
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EP
European Patent Office
Prior art keywords
alloys
alloy
temperatures
hour
cast
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
Application number
EP19800104147
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German (de)
English (en)
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EP0042455A3 (en
EP0042455A2 (fr
Inventor
Gerad Barbezat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sulzer AG
Original Assignee
Gebrueder Sulzer AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gebrueder Sulzer AG filed Critical Gebrueder Sulzer AG
Publication of EP0042455A2 publication Critical patent/EP0042455A2/fr
Publication of EP0042455A3 publication Critical patent/EP0042455A3/de
Application granted granted Critical
Publication of EP0042455B1 publication Critical patent/EP0042455B1/fr
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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
    • C22C9/01—Alloys based on copper with aluminium as the next major constituent

Definitions

  • the invention relates to a CuAICo alloy with high wear resistance and with a fine structure, which contains components - in addition to the usual impurities - at least Al, Fe, Co, Cr, Mn, Cu.
  • the wear i.e. the wear on relative movements compared to other materials, such as steel
  • the object of the invention is therefore to improve the mechanical properties and in particular the wear behavior of the known alloys.
  • alloys the composition (in% by weight) of Al 14-16; Fe 4-6; Co 2.5-3.5; Mn 1-1.5; Cr 0.4-0.8; Be 0 to 0.2; Zr 0.01-0.5; The remainder is Cu, the sum of Fe and Co being greater than 7.5, and their structure in the as-cast state having grain sizes of between 20 and 50 ⁇ m.
  • the castability, ie above all the flowability, of the alloy melt can be improved if it contains up to 0.2% Be; This addition primarily reduces the formation of A1 2 0 3 and the risk of oxide inclusions in the melt.
  • a method for producing the alloy according to the invention is characterized in that at least part of the Zr and / or Be content is achieved by melting treatments at temperatures between 1150 and 1250 ° C. within the last 30 minutes before casting by adding amounts of these substances that guarantee the final levels mentioned.
  • the melt treatment primarily brings about the desired fineness of the structure, which is necessary for the improved wear behavior, which is a characteristic of the present invention.
  • the mechanical properties which can be influenced to a certain extent by variations in the composition within the specified ranges - for example, the hardness achieved depends on the AI content -, for example, for sand cast workpieces in the as-cast state, the following values result:
  • a melt of 100 kg of a CuAICo alloy according to the invention is to be produced, in which the cast workpiece should have a Brinell hardness of 380 HB in the as-cast state.
  • the return material, Mn, Cu, Co and the master alloy CuCr are first melted in an Mf induction furnace equipped with a graphite crucible, with 0.5% cryolite being added to the melt as slag formers ; The FeAI master alloy is then inserted and the pure aluminum is then brought into the melt.
  • the melt is treated with zirconium (Zr) at 1200 ° C.
  • Zr zirconium
  • an amount of 0.1% zircon is used in the form of a master alloy CuZr 50 (50% Cu, 50% Zr), which is added to the melt.
  • the alloy is poured into sand molds at 1180 ° C.
  • the cast workpiece is then normalized by a heat treatment between 900 and 950 ° C, whereby it is heated at a heating rate of 150 ° C per hour in air to about 600 ° C and then at a higher heating speed to 950 ° C. It is then held at this temperature for 1 hour and an additional 1 hour each 25 mm wall thickness before it is cooled in still air.
  • FIG. 1 illustrates in a comparison the relative wear resistance of a known alloy of the type mentioned (column 1) and the alloy according to the invention according to example 1 (column 2).
  • the ordinate of the display shows the respective abrasion determined by weighing, which results from a standard wear test. In this test, a rolling element made of 18/8-Cr / Ni stainless steel loaded with approximately 30 N runs in a sliding element made of the alloy to be tested without a lubricant for a fixed period of time, which in the present case is 20 hours. The resulting abrasion is collected and weighed.
  • the known alloy results - averaged from several measurements - between 550 and 800 mg / 20 h - the scattering range is shown hatched - while the new alloy has values between 250 and 550 mg per 20 Hours have been measured.
  • FIG. 2a and 2b show metallographic micrographs in 100x magnification, from which the differences in the grain sizes are immediately apparent;
  • grain sizes of about 300 ⁇ m result for the known alloy, as already mentioned, while grain sizes of 40 ⁇ m can be determined from FIG. 2b for the alloy according to the invention.
  • the use of the new alloy is not limited to workpieces made of sand castings, so electrodes can also be produced therefrom for continuous welding or for extrusion, for example on unalloyed steel.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Heat Treatment Of Steel (AREA)

Claims (3)

1. Alliage de CuAICo de grande résistance à l'usure comportant une structure fine qui contient comme composants, en plus des impuretés habituelles, au moins AI, Fe, Co, Cr, Mn, Cu, caractérisé par la composition suivante (en % en poids):
AI 14-16; Fe 4-6; Co 2,5-3,5; Mn 1 à 1,5; Be 0 à à 0,2; Cr 0,4 - 0,8; Zr 0,01 - 0,5; reste Cu,

la somme de Fe et Co étant plus grande que 7,5, et caractérisé encore par une structure ayant des dimensions de grains dans la condition de coulée allant de 20 à 50 µm.
2. Procédé pour fabriquer un alliage selon la revendication 1, caractérisé en ce qu'on obtient une partie de la proportion de Zr et/ou de Be par des traitements de coulée à des températures allant de 1150 à 1250 °C pendant les dernières 30 minutes avant la coulée par additions de quantités de ces matières qui garantissent las proportions finales mentionnées.
3. Procédé selon la revendication 2 pour des pièces coulées par coulée en sable, caractérisé en ce que la pièce coulée est soumise à des températures allant jusqu'à 1000 °C à un traitement de normalisation dans lequel le temps de maintien est d'au moins une heure et additionnellement d'une heure de plus par tranche de 25 mm d'épaisseur de paroi et dans lequel le refroidissement a lieu à l'air en repos, une vitesse de chauffage d'au plus 200 °C par heure devant être alors maintenue pour atteindre des températures d'environ 600 °C.
EP19800104147 1980-06-23 1980-07-16 Alliages à base de cuivre, contenant de l'aluminium et du cobalt et présentant une bonne résistance à l'usure; procédé pour la fabrication de ces alliages Expired EP0042455B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4787/80 1980-06-23
CH478780A CH646998A5 (de) 1980-06-23 1980-06-23 Cualco-legierungen hoher verschleissfestigkeit.

Publications (3)

Publication Number Publication Date
EP0042455A2 EP0042455A2 (fr) 1981-12-30
EP0042455A3 EP0042455A3 (en) 1982-01-13
EP0042455B1 true EP0042455B1 (fr) 1983-11-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800104147 Expired EP0042455B1 (fr) 1980-06-23 1980-07-16 Alliages à base de cuivre, contenant de l'aluminium et du cobalt et présentant une bonne résistance à l'usure; procédé pour la fabrication de ces alliages

Country Status (3)

Country Link
EP (1) EP0042455B1 (fr)
CH (1) CH646998A5 (fr)
DE (1) DE3065458D1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2179673A (en) * 1985-08-23 1987-03-11 London Scandinavian Metall Grain refining copper alloys
CN102242291B (zh) * 2011-07-15 2012-10-03 宁波金田铜业(集团)股份有限公司 拉深模具铜合金
CN103805803A (zh) * 2013-11-04 2014-05-21 熊科学 一种具有去除水垢功能的合金材料制备方法
CN114438355A (zh) * 2022-01-20 2022-05-06 浙江力博实业股份有限公司 一种铜铬锆合金的成分控制方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2944890A (en) * 1958-01-22 1960-07-12 Ampco Metal Inc Aluminum bronze alloy having improved wear resistance by the addition of cobalt and chromium
US2937941A (en) * 1958-02-24 1960-05-24 Ampco Metal Inc Aluminum bronze alloy containing manganese and chromium and having improved wear resistance
US2979397A (en) * 1958-11-21 1961-04-11 Ampco Metal Inc Aluminum bronze alloy having improved wear resistance by the addition of cobalt and manganese
US3117002A (en) * 1960-02-16 1964-01-07 Ampco Metal Inc Aluminum bronze alloy having improved wear resistance by the addition of cobalt, chromium, and manganese

Also Published As

Publication number Publication date
DE3065458D1 (en) 1983-12-08
CH646998A5 (de) 1984-12-28
EP0042455A3 (en) 1982-01-13
EP0042455A2 (fr) 1981-12-30

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