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Wear-resistant high-thermal-conductivity sintered alloy especially suitable for bearings and valve seat rings

A sintered alloy, high thermal conductivity technology, applied to bearings, shafts and bearings, bearing components, etc., can solve problems such as unfavorable production costs

Pending Publication Date: 2022-05-03
MAHLE INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In production, it is necessary to use copper powder with an average particle size of 45 μm or less and a purity of 99.5% or higher, which is naturally unfavorable to production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Example 1 Seat ring with high thermal conductivity:

[0046] Here based on pure copper powder (purity>99%) with an average particle size of 70 μm to 160 μm, which is mixed with 0.5% of pressing additives, 2% of solid lubricant MoS 2 Mixed with 35% Fe-based hard phase (T10), then pressed to 93% relative density, sintered at 980°C under nitrogen-hydrogen atmosphere, the front surface and AD were ground to final size.

Embodiment 2

[0047] Axial bearing in the turbocharger of embodiment 2:

[0048] This is based on a bronze alloy with a tin content of 10% and an average particle size of 60 μm to 150 μm mixed with 0.5% of pressing additives, 2% of solid lubricant MnS and 20% of Fe-based hard phase (T10), followed by Pressed to 93% relative density, sintered at 900°C under nitrogen-hydrogen atmosphere, oil-immersed at atmospheric pressure, front surface ground to final size, and surface structured by a new pressing / embossing process .

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PUM

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Abstract

The invention relates to a sintered alloy which is produced by a powder metallurgy method, is wear-resistant and high in heat conductivity and takes copper as a matrix. The sintered alloy is a powder mixture of a copper-based powder, a total fraction of a hard phase of 8 to 40 wt.%, a total fraction of a solid lubricant of 0.4 to 3.8 wt.%, a total fraction of a pressing additive of 0.3 to 1.5 wt.% and production-related impurities, characterized in that the powder mixture comprises at least 55 wt.% of a copper-based powder.

Description

technical field [0001] The present invention relates to powder metallurgically produced, wear-resistant, highly thermally conductive, copper-based sintered alloys, particularly for bearing and seat ring applications, wherein the sintered alloy is copper-based powder, hard phase, solid lubricant and powder mixes of pressed additives. The invention also relates to the production and use of a wear-resistant, highly thermally conductive, copper-based sintered alloy. Background technique [0002] Various materials, so-called bearing metals, are currently used to sinter alloys to produce bearings, such as plain bearings, and also for seat rings. Bearing metals should have high strength and high resistance, and should have as little frictional resistance as possible so that they reduce heat generation and wear. Alloying metals and their proportions should vary according to the properties prioritized in the respective application. [0003] Steel powder sintered alloys are known i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/105B22F3/02B22F3/10B22F5/10C22C30/04C22C30/06C22C32/00
CPCB22F3/02B22F3/1007B22F5/106C22C30/04C22C30/06C22C32/0005C22C1/0425C22C1/051C22C9/04F16C17/02F16C33/12F16C2220/20B22F1/09B22F2998/10B22F5/008C22C32/0021C22C32/0063C22C32/0068F16C2204/10F16C2202/50F16C2202/52F16C2204/14F16C2204/12F16C2206/56F16C2206/60F16C33/145F16C2202/10C22C9/02C22C9/00C22C9/01C22C9/06B22F1/10B22F3/16B22F3/26
Inventor 安德里亚斯·古特曼莉莉娅·库马纳耶娃帕特里克·舒泰克劳斯·温特里希亚历山大·普克
Owner MAHLE INT GMBH