초록 ▼

The invention relates to a method for producing a bi-material sliding bearing (1) whereby a metal sliding layer (3) of at least two different particle types is deposited under reduced pressure from the gas phase on a flat, metal substrate (8), and a first particle type forms a matrix with first grai

The invention relates to a method for producing a bi-material sliding bearing (1) whereby a metal sliding layer (3) of at least two different particle types is deposited under reduced pressure from the gas phase on a flat, metal substrate (8), and a first particle type forms a matrix with first grains and the second particle type forms grains embedded in the matrix of the metal sliding layer (3), and the metal sliding layer (3) is produced with a thickness (4) of more than 250 μm and with a Vickers hardness below 100 HV(0.025), and the metal sliding layer (3) is made of a single layer in only one pass and with a maximum grain size of at most 1 μm for at least 90% of the first grains forming the matrix and with a maximum grain size for at least 90% of the embedded grains, and a maximum particle size of at most 1.5 μm for the remaining grains making up 100% of all grains.

대표청구항 ▼

1. Method for producing a bi-material sliding bearing whereby a metal sliding layer of at least two different particle types is deposited from the gas phase under reduced pressure on a flat, metal substrate constituting the supporting layer of the sliding bearing, the particle types being produced v

1. Method for producing a bi-material sliding bearing whereby a metal sliding layer of at least two different particle types is deposited from the gas phase under reduced pressure on a flat, metal substrate constituting the supporting layer of the sliding bearing, the particle types being produced via at least one electron beam by evaporation from at least one container constituting an evaporation source, and a first particle type forms a matrix with first grains and the second particle type forms grains embedded in the matrix of the metal sliding layer, and whereby, after depositing the metal sliding layer so that a coated substrate is formed, the coated substrate is re-shaped to obtain the sliding bearing, the metal sliding layer being produced with a thickness of more than 250 μm and with a Vickers hardness below 100 HV(0.025), wherein the metal sliding layer is made of a single layer in only one pass and with a maximum grain size of at most 1 μm for at least 90% of the first grains forming the matrix and for at least 90% of the embedded grains, and a maximum grain size of at most 1.5 μm for the remaining grains. 2. Method according to claim 1, wherein the particles are activated via a plasma. 3. Method according to claim 1, wherein the metal sliding layer is deposited at a deposition rate of at least 50 μm/min. 4. Method according to claim 1, wherein the metal substrate is moved above the at least one evaporation source with a linear motion at a speed selected from a range of 0.1 mm/s to 1 mm/s. 5. Method according to claim 1, wherein the metal substrate is moved above the at least one evaporator source at a distance selected from a range of 200 mm and 500 mm. 6. Method according to claim 1, wherein the surface of the metal substrate is exposed to a plasma prior to coating. 7. Bi-material sliding bearing comprising a metal supporting layer and a metal sliding layer disposed thereon, the metal sliding layer being produced via an electron beam vapor deposition process, and a matrix having first grains and second grains embedded in the matrix, and the metal sliding layer has a thickness of more than 250 μm and a Vickers hardness below 100 HV(0.025), wherein the metal sliding layer is made of a single layer and at least 90% of the first and second grains of the metal sliding layer have a maximum grain size of at most 1 μm and the remaining grains have a maximum grain size of at most 1.5 μm. 8. Bi-material sliding bearing according to claim 7, wherein the matrix comprises a base element selected from a first group comprising aluminum, tin, copper. 9. Bi-material sliding bearing according to claim 8, wherein the second grains comprise at least one element selected from a group comprising tin, bismuth, silicon, magnesium, manganese, iron, scandium, zirconium, chromium, copper, aluminum, antimony, nickel, carbon (graphite) with the proviso that the other element is different from the base element. 10. Bi-material sliding bearing according to claim 7, wherein the metal sliding layer comprises an alloy selected from a group comprising AlSnxCuy, AlSnxSiy, AlBix, CuSnx, CuBix, CuSnxBiy, SnAlx, SnSbx, SnCuxSby, where x and y respectively stand for a value selected from a range with a lower limit of 1 and an upper limit of 30. 11. Bi-material sliding bearing according to claim 7, wherein the grain size of the second grains is at most half the size of the grain size of the first grains. 12. Bi-material sliding bearing according to claim 7, wherein the first grains constituting the matrix and/or the second grains embedded in the matrix have an at least approximately globular habit. 13. Bi-material sliding bearing according to claim 7, wherein the metal sliding layer is disposed directly on the metal supporting layer.