DE756154C - Use of copper alloys for plain bearings and methods of manufacturing the same - Google Patents

Description

Alloys atif copper-zinc-based have recently been used as an exchange increased importance of copper-tin alloys. The aim is to Verli: Lltn13-moderately thin-walled bearing bodies to use in order to save material after .possible to restrict. It is therefore necessary that the materials have good ductility, in particular have a good drawable: cit.

Alloys based on copper-silicon-zinc have become known, the two other additives, such as tin and especially lead, provide. Although the lead as Additional metal improves the machining processing, is therefore at a percentage higher additives are associated with a considerable deterioration in wear resistance, which is definitely inadmissible for highly stressed bearings.

Furthermore, an alloy based on copper-silicon-zinc has become known, which works without the additives mentioned. However, it shows a very high copper and a correspondingly high level of silicon gel. The bad associated with this Sliding properties and the low wear resistance as well as a lack of cold workability by kneading the area of application of this alloy is very limited.

According to the invention, the use `.-OP l.eg'ertnigeli, iie @ teh'Iid from 63 to; o" lo copper, o.7 to i '% silicon, the remainder zinc of the usual purity or greater purity , proposed for the production of sliding bearings. the disadvantages of the known bearing alloys are characterized 1leseitigt to the full extent. particularly advantageously, the composition was 68% Cu, 1 0/0 Si, rest Zn found.

The bearing alloy according to the invention has an excellent hot and cold formability, so ci <@fa it to diini2tvandigen tubes, thin rods, Sheets and strips can be processed easily. The resistance and the behavior in the kneading treatment as well as the surface properties are such, dall a l: ninmm of only i 0`o of the finished item alsearl) eltt117gSZtlf @ Lli slammed «-erden got to.

The alloy according to the invention for plain bearings is after another : Feature of the invention --- subjected to further hot and cold working, tin, 1 though the bearing metal experiences a warning after a warning by rolling or pressing at least i3 to ao0, `oige cold stretching by rolling or drawing. Also can the bearing metal Bach d = ir Haltreclsung a heat treatment z: -.- isch @@ n -2; o un # 1 -loo = i learn. The latter is used in particular to eliminate stretching stresses, which arise as a result of cold stretching and cause difficulties in operation due to warping and clamps when heating. The cold kneading itself is also a Sufficient number of slip lines formed, the bearing side a greater affinity to the oil layer as a result of the chaining of the oil molecules and thus an increase in the Generate adhesion of molecularly fine oil layers. This makes it possible to use clen State of almost perfect fluid friction, increasing in size in its area .-, rn and to achieve very high bearing loads. Except for the mentioned slip lines the Gefiige the hard silicide precipitations, which are important for good sliding properties in V-eicher basic mass.

In a further embodiment of the invention, composite bearings can be produced the bearing metal according to the invention together with e.no support tube, support shell 11s «-. (atis eillenl any material, e.g. steel) subjected to a kneading process will.

Plain bearings manufactured according to the inventive method are, show extremely favorable sliding properties and even after r ner large Number of hours of operation a practically htlrn nießliai-e.9 wear. Such Plain bearings can be widely used to the power of 1; bearings containing tipfer and high tin in one replace large extent.

Claims (1)

P-1TE \ T1 \ SYP (CIIF: i. Use of alloys. loading standing from 63 bis; o "/ (, copper, o.3 bis 1. 5 "/ o silicon, zinc RCST. For the preparation of fully Gleltlagei'ii. z. Use of alloy part for Plain bearing according to claim i, felcennzeicli- net by a content of copper, i ° / o silicon, the remainder zinc. 3. Process for the production of sliding lasers according to claims i and =, there- characterized in that the bearing metal na @@ li a waiting warning by U'al- e ,. G, ler pressing an I27717des'iell @ I @ - 1) I @ 2o "/" ige hold stretching by rollers or Pulling experiences. a .. The method of claim 3. thereby marked that the camp nictall after hot treatment for cold stretching between 2, # O '# and .Ioo'- C met. 5. Process for the production of sliding store according to claims 3 and .1, there- characterized in that the bearing metal together with a support tube (from a t , rel.iellign @@ -: erl: anü`, zh: @ t, ihll one Knetl @ ehandlun @ is subjected.