Daido Metal Company Ltd.

Tohru Kato

Masaaki Sakamoto

Tadashi Tanaka

Yoshiaki Sato

Koichi Yamamoto

Mitsuru Sugita

Yoshikazu Mizuno

A multi-layered bearing having superior load-resistance comprises an aluminium base bearing alloy layer and a backing metal layer. The bearing alloy consists essentially of, by weight, 2-8% zinc, 0.1-8% silicon, 0.1-3% copper, 0.05-3% magnesium and the balance of aluminium. The bearing alloy is subjected to a solution treatment and an artificial aging treatment, and it has a hardness of Hv 70 or greater. The bearing alloy may contain at least one element selected from the following five elements of lead, manganese, vanadium, chromium and nickel, and may further contain strontium and/or titanium and boron. The hardness of the bearing alloy may be Hv 70 or higher by performing solution treatment on a bimetal at a temperature of 400.degree. C. or higher before the plastic working, and further by performing an artificial aging treatment thereon at a temperature of 250.degree. C. or lower.

Aluminum base alloy bearing having superior load-resistance and method

A multi-layer sliding bearing having an excellent anti-fretting property, comprises a back steel layer, and a bearing alloy layer formed on the back steel layer. A film of phosphate having a thickness of 0.1-15 .mu.m is formed on a back surface of the back steel layer, thereby enhancing the anti-fretting property of the bearing. The provision of the phosphate film well compatible with a mating material overcomes damage to the bearing due to fretting in a high-speed range. Therefore, the bearing can fully exhibit a bearing performance even under severe conditions of use in a high-speed, high-temperature and high-load range as typically experienced in a high-performance engine.

Multi-layer sliding bearing having excellent fretting property

There is disclosed a multi-layer sliding member having a back metal and a Cu--Zn-based alloy layer bonded to the back metal with a sufficiently high bonding strength. A method of producing such a sliding member is also disclosed. The multi-layer includes a back metal, a brazing material bonded to the back metal, a diffusion mixture layer bonded to the brazing material, and a Cu--Zn-based alloy layer bonded to the diffusion mixture layer. The diffusion mixture layer is a layer in which not less than 10 wt. % Ni, components of the Cu--Zn-based alloy and components of the brazing material are mixed with one another. The diffusion mixture layer has a thickness of 5.about.300 .mu.m.

Multi-layer sliding member

There is disclosed a novel aluminum alloy bearing which exhibits a more excellent fatigue resistance than conventional bearings even under such conditions of use as at a high temperature and under a high load. The aluminum alloy bearing has an aluminum bearing alloy layer containing, by weight, 1 to 10% Zn, 0.1 to 5% Cu, 0.05 to 3% Mg, 0.1 to 2% Mn, 0.1 to 5% Pb, 0.1 to 2% V, and 0.03 to 0.5% in total of Ti--B, and further may optionally contain not more than 8% Si, 0.05 to 0.5% Sr, and Ni, Co and Cr. The alloy may be bonded to a steel metal back sheet, and a surface layer may be formed on the surface of the bearing. By use of the composition of the alloy of the invention, the fatigue resistance of the aluminum alloy bearings has been improved, and such an improved bearing can fully achieve a bearing performance even under severe conditions of use as at high temperature and under a high load.

Aluminum alloy bearing

A slide bearing which is preferably used in combination with a low-rigid aluminum alloy housing. The slide bearing has a high coefficient of thermal expansion so that it can satisfactorily follow up deformation of the housing, and the bearing also has an excellent heat radiation property. In the slide bearing, an overly bearing layer having a thickness of 3 to 50 .mu.m is provided on a copper alloy layer having a coefficient of thermal expansion of 15.times.10.sup.-6 /.degree.C. or more, a coefficient of thermal conductivity of 0.40 cal/cm sec .degree.C. or more and 0.2% proof stress of 295N/mm.sup.2 or more. As occasion demands, the slide bearing may be (1) provided with an intermediate layer between the copper alloy layer and the overlay bearing layer, or (2) flash-plated on an entirety surface of the bearing.

Multilayer slide bearing and bearing assembly

A sliding bearing has a back metal made of a copper alloy which has a high followability with respect to deformation of a light alloy housing, and with this construction, the sliding bearing is excellent in fretting resistance and migration resistance. The multi-layer sliding bearing for a light alloy housing includes an aluminum alloy bearing layer, and a back metal layer, the back metal layer being made of a copper alloy which has a thermal expansion coefficient of not less than 15.times.10.sup.-6 /.degree.C., a 0.2% yield strength of not less than 295 N/mm.sup.2 and a heat transfer coefficient of not less than 0.40 Cal/cm.cndot.sec.cndot..degree.C. A Pb-alloy overlay layer can be formed on the bearing layer. A bonding layer can be formed between the bearing layer and the back metal layer. A flash plating layer can be formed on an entire surface of the bearing. When a large interference is not obtained, or under sever conditions as when the temperatures of the bearing and the lubricating oil rise in a high-speed range of the internal combustion engine or as when the inertia force of the housing increases, an excellent bearing performance is achieved by the sliding bearing of the present invention.

Sliding bearing for light alloy housing

Wear resistance, seizure resistance, durability and corrosion resistance of an Oldham ring made of an aluminum alloy engaging with a swivel scroll made of an aluminum alloy are improved. The Oldham ring comprises a substrate made of an Al--Si alloy which has a light weight and a high strength, a bond layer of a multiplex zinc base alloy containing Cu and Ni as a primary plating layer which is formed on the substrate, and an electroless Ni--P plating layer having a hardness of MHV550 which is formed on the outermost surface of the Oldham ring.

Oldham ring of scroll type compressor

A copper base alloy suitable for use as a material of a sliding member, superior in seizure resistance, wear resistance and corrosion resistance. The alloy comprises 1.0 to 3.5 wt % Mn, 0.3 to 1.5 wt % Si, 11.5 to 25 wt % Zn, 5 to 18 wt % Pb and the balance substantially Cu and incidental impurities, the lead being uniformly distributed through the structure of the alloy. The alloy has a microstructure of which matrix is composed of .alpha.-phase alone. The alloy can further contain at least one selected from the group consisting of 0.02 to 1.5 wt % Mg and 0.1 to 1.5 wt % Te and/or at least one selected from the group consisting of 0.5 to 3.0 wt % Ni and 0.3 to 3.0 wt % Al.

Copper base alloy superior in resistances to seizure, wear and corrosion

A wear-resistant copper alloy containing 1.2 to 8.5% Mn, 0.3 to 2.5% Si, 3.0 to 8.0% Al, 20 to 40% Zn, 0.05% to 1.5% Te, and the balance of Cu and unavoidable impurities. The alloy includes other variations based on by adding (1) 0.5 to 3% Ni, (2) 0.5 to 13% Pb, (3) 0.5 to 3% Ni and 0.5 to 13% Pb or (4) 0.5 to 13% Pb and 0.02 to 1.5% Mg. Lead provides the self-lubricating property to the alloy. Magnesium disperses lead finely and uniformly in the alloy.

Wear resistant copper alloys

An aluminum-based bearing alloy of the invention comprises 3-40% Sn, 0.1-10% Pb, 0.1-5% Cu, 0.1-3% Sb, total 0.05-1% of Ti and B which satisfy the equation: B/Ti+B=0.1 to 0.35, and the balance being essentially Al. The aluminum-based bearing alloy according to the present invention has excellent fatigue resistance and anti-seizure property.

Aluminum-based bearing alloy with excellent fatigue resistance and

Disclosed is an aluminum based alloy bearing having a strengthened intermediate bonding layer, which comprises a backing steel, an intermediate bonding layer and an aluminum based bearing alloy layer. In this alloy bearing, the intermediate bonding layer has a hardness ranging from 40% to 70% of that of the aluminum based bearing alloy layer in terms of Vicker's hardness.

Aluminum based alloy bearing having strengthened intermediate bonding

An aluminum alloy bearing for use in a low-rigidity housing, includes a bearing aluminum alloy, and a steel back metal bonded to the bearing aluminum alloy. The steel back metal contains 0.16 to 0.35 wt. % of carbon, and the steel back metal has a hardness of Hv 200 to 280 and has an elastic limit of not less than 40 kgf/mm.sup.2. For producing the aluminum alloy bearing, the back metal material is pressure-bonded to the bearing aluminum alloy in such a manner that the rolling reduction of the back metal material is 38 to 50%.

Aluminum alloy bearing for use in low-rigidity housing and method of

Disclosed in an Al-based alloy for use as sliding material, superior in fatigue resistance and anti-seizure property consisting, by weight, of 1-10% Zn, 1-15% Si, 0.1-5% Cu, 0.1-5% Pb, 0.005-0.5% Sr, and the balance Al and incidental impurities.

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Seto, Japan

Tohru Kato