Daido Metal Company Ltd.

Other

Tsukimitsu Higuchi

Koichi Yamamoto

Masaaki Sakamoto

Tadashi Tanaka

Takayuki Shibayama

Kouki Ozaki

Naohisa Kawakami

Takashi Inaba

Yoshiaki Sato

Toshio Egami

Keizo Mizuno

Kenji Yamanouchi

There is disclosed a sliding member which slidably contacts an counterpart member with friction and in which a friction force is varied without changing a contact pressure. A sliding member is formed by covering a steel plate with sliding materials to different in friction coefficient. In this case, when a sliding direction of the counterpart member is set to directions of arrows A and B, a sliding material of a low friction coefficient is disposed in the middle, and the sliding materials to are arranged so that the friction coefficient gradually increases toward both terminal sides in the directions of arrows A and B of the sliding material . According to the sliding member , the friction force increases as the counterpart member moves in the directions of arrows A and B from the middle.

Sliding member

There is provided a copper-based sliding alloy excellent in wear resistance and anti-seizure property. A phase of 2 to 30 wt. % lead is dispersed in the copper alloy. This lead phase contains 0.1 to 6 vol. % hard particles such as SiC, SiO,, Si,N,, Al,O,, TiC, WC and TiN having an average particle size of 5 to 25 &mgr;m. Because hard particles are included in the lead phase, wear resistance is excellent and anti-seizure property is improved. The lead phase, which is soft, serves as a cushion and the attack on a mating member by hard particles is reduced. Further, the falling-off of lead is minimized because the lead phase also includes the hard particles.

Copper-based sliding alloy

A copper-lead alloy bearing having a high corrosion resistance, especially a high corrosion resistance to sulfur, comprising a back metal and a copper-lead-based bearing alloy bonded thereto. The copper-lead-based bearing alloy consists of more than 10 but not more than 20% Ni, 0.5 to 8% Sn, 8 to 30% Pb, not less an 0.005 but not more than 0.2% P, and the balance of Cu and incidental impurities.

Copper-lead alloy bearing

An end bearing used in an automatic transmission gear having a one-way clutch mechanism having multi-layers comprising a back metal, a copper alloy layer, a tin layer having a thickness of 0.5 to 4 .mu.m and a Cu-Sn intermetallic compound layer having a thickness of 0.5 to 4 .mu.m and having a Microvickers hardness of from 400 to 700, which intermetallic compound layer is positioned just under the tin layer and which intermetalic compound layer is are formed on the copper alloy of such an end bearing. According to the present invention, it is possible to improve anti-seizure characteristics of an end bearing even under a condition of a decrease in the amount of oil supply which decrease occurs in higher engine speed, thus enabling the provision of an end bearing having superior anti-seizure characteristics.

Multilayered end bearing

A multi-layer bearing consists of a backing steel plate, a layer of Cu--Pb bearing alloy comprising, by weight, 1 to 20% of Ni and containing Pb-phase grains dispersed in the matrix, and an overlay of Pb alloy containing In. In in the overlay is diffused into the Pb-phase grains in the bearing alloy layer and forms a diffusion layer of high corrosion resistance in which In coexists with the Pb-phase grains, in an area of 30 to 200 .mu.m from the interface to the overlay. Even if the overlay is worn and the Cu--Pb bearing alloy layer is exposed, high corrosion resistance will be maintained.

Cu-Pb alloy bearing

A sliding-contact material comprising a backing steel plate optionally plated with Cu, and a layer of sintered copper alloy formed on one of the surfaces of the backing steel plate, wherein the layer of sintered copper alloy consists essentially of 4 to 20 wt % Sn, 1 to 10 wt % Ni, 0.05 to 1 wt % B, and balance of Cu and incidented impurities, and does not practically include P, and the sintered copper alloy has a Vickers hardness not less than Hv 100.

Sliding-contact material excellent in corrosion resistance and wear

Disclosed is a copper-lead based bearing material having excellent corrosion resistance, comprising a steel back metal and a bearing layer of a copper-lead based bearing alloy, the latter consisting essentially, by weight, 0.5 to 10% Bi, 0.5 to 8% Sn, 15 to 30% Pb, 2 to 10% Ni, not greater than 0.2% P, the balance Cu and incidental impurities. By adding Bi in a copper-lead based bearing alloy it becomes possible to obtain excellent corrosion resistance without impairing the conformability and seizure resistance of the bearing material in comparison with the conventional copper-lead based bearing alloys.

Copper-lead based bearing alloy material excellent in corrosion

A copper-alloy slide bearing for a low-rigidity housing having a three-layer structure of a steel back-metal, a copper-alloy layer and an overlay, the back metal containing 0.03 to 0.26% by weight of carbon. During the production of the slide bearing, a bimetal is prepared in such a manner that a back-metal portion is rolled at a total rolling reduction of 10 to 35%, and the resultant bimetal is heat-treated at a relatively low temperature, so that the slide bearing includes a back metal having a 0.01% elastic limit of not less than 300 N/mm.sup.2. When the copper-alloy slide bearing is used in a low-rigidity housing of an internal combustion engine, the slide bearing is capable of more excellently following the deformation of the housing, as well as capable of providing more excellent intimate contact and more excellent fretting resistance, than a conventional multi-layer slide bearing.

Copper-alloy slide bearing for low-rigidity housing and method for

A copper alloy sliding bearing of a three-layer structure comprises a steel back metal layer of a high strength, a copper alloy layer, and an overlay. The steel back metal layer contains 0.15-0.26% by weight of carbon, and the steel back metal layer has a 0.2% yield strength of not less than 440 N/mm.sup.2. With this structure, even under severe conditions of use in an internal combustion engine of a high-speed design, in which an increased inertia force is applied to the housing, the followability of the bearing relative to the deformation of the housing is enhanced, and the bearing performance such as an anti-fretting property and an anti-seizure property is excellent.

Copper alloy sliding bearing with high-strength back metal

An aluminum bearing alloy sliding member excellent in anti-seizure property, of which sliding surface is coated with a film of aluminum fluoride or manganese phosphate formed by a chemical conversion process and having a thickness ranging from 0.1 .mu.m to 10 .mu.m.

Sliding member made of aluminum bearing alloy having excellent

The present invention provides a multilayer composite sliding material with excellent seizure resistance property having a steel plate or a steel plate having surfaces plated with copper or the like; a bond layer having a thickness of 0.05 to 0.5 mm, formed on the steel plate, and made of a sintered powder material consisting of 5 to 16% Sn, 0 to 15% Pb, 0 to 0.5% P and balance essentially Cu; and an alloy layer having a thickness of 0.1 to 1.0 mm, formed on the bond layer, and made of a sintered powder material consisting of 5 to 16% Sn, 1 to 12% MoS.sub.2 and balance essentially Cu. In a modified form of the alloy layer, not more than 20% Pb, not more than 1% P or not more than 12% Ni may be added. MoS.sub.2 powder may be coated with Cu or Ni.

Multilayer composite sliding material having excellent seizure

The sliding member of the invention comprises a steel backing and a sintered Cu-alloy layer mounted integrally on one surface of the backing metal, wherein the sintered Cu-alloy comprises 1 to 15% Sn, 1 to 20% Ni-B compound, 1% or less phosphorus, and the balance of Cu and impurities. Cu-alloy may further contain 1 to 30% Pb and/or 0.5 to 8% graphite. Pb and graphite provide the sliding alloy layer with good lubrication property. Preferably the Ni-B compound is used, which is composed of 7 to 15% B and the balance of Ni and impurities.

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Nagoya, Japan

Tsukimitsu Higuchi