Plain bearing alloy consisting of a tin-based white metal

Abstract

The invention relates to a plain bearing alloy consisting of a tin-based white metal and containing antimony as the primary alloy element and between 1 and 10 % by weight copper. The aim of the invention is to achieve excellent strength characteristics coupled with a high degree of ecofriendliness without impairing the tribological characteristics. To achieve this, the white metal, which except for inevitable impurities is devoid of cadmium, lead, arsenic and chrome, contains between 4 and 30 % by weight antimony as the primary alloy element, at least one element from an element group containing cobalt, manganese, scandium and germanium, in a total concentration relating to the elements from said group that are used, of between 0.2 and 2.6 % by weight, in addition to at least one element from an element group containing magnesium, nickel, zircon and titanium, in a total concentration relating to the elements from said group that are used, of between 0.05 and 1.7 % by weight, the maximum total proportion of antimony and copper being 35 % by weight for an antimony content that corresponds to three times the copper content.

Description

technical field [0001] The invention relates to plain bearing alloys made of tin-based white metals (Weiβ metall) which contain antimony as the main alloying element and 1 to 10% by weight of copper. Background technique [0002] Tin-based plain bearing alloys are known (GB 2 146 354 A) which may have 2-15% by weight of antimony, 1-10% by weight of copper, up to 15% by weight of lead and other alloying elements, Such as cadmium, nickel, silver, tellurium, cobalt, magnesium, manganese and arsenic, the titanium content of 0.005 to 0.5% by weight refines the microstructure of the bearing workpiece and thus improves the allowable load of the sliding bearing . In order to improve environmental friendliness The load-carrying capacity (Belastbarkeit) of the white metal alloy (Weiβmetallegierungen) has been proposed (DE 101 45 389 C2) to use, in addition to 6-15% by weight of antimony and 3-10% by weight of copper, a content of 0.1-18 % by weight bismuth. Despite this measure,...

AI Technical Summary

Problems solved by technology

Despite this measure, the known plain bearing alloys, which do not contain environmentally harmful alloy components, do not meet the higher strength requirements and thus the higher demands on load-carrying capacity and wear and tear resistance Aluminum-based bearing metals are often chosen in the case of aluminum-based bearing metals, although the excellent emergency start characteristics of tin-based bearing metal alloys must be sacrificed when using this bearing metal (Notlaufeigenschaft)