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High-strength antifriction double-layered iron base powder metallurgy material and preparation method thereof

An iron-based powder metallurgy and surface material technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of unstable friction contact interface and lubrication state, low strength and hardness of anti-friction layer, poor wear resistance, etc. Achieve the effect of reducing precious alloy components, meeting the requirements of hardness and wear resistance, and high bearing capacity

Active Publication Date: 2016-10-26
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this patent improves the bearing capacity and tribological performance of the bushing to a certain extent, the strength and hardness of the anti-friction layer are low, the wear resistance is poor during the working process, the friction contact interface and lubrication state are unstable, and the wear problem is serious

Method used

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  • High-strength antifriction double-layered iron base powder metallurgy material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The high-strength anti-friction double-layer iron-based powder metallurgy material in this embodiment is composed of a surface layer material and a matrix material, and the thickness of the surface layer material is 1 / 5 of the thickness of the double-layer iron-based powder metallurgy material.

[0025] The raw materials of the surface material are constituted by mass percentage: reduced iron powder 5.04g (84%), copper powder 0.6g (10%), nickel powder 0.15g (2.5%), molybdenum powder 0.03g (0.5%), graphite powder 0.03 g (0.5%), ferrophosphorus powder 0.03g (0.5%), titanium hydride powder 0.06g (1%) and zinc stearate powder 0.06g (1%).

[0026] The raw materials of the base material are constituted by mass percentage: reduced iron powder 21.6g (90%), copper powder 1.2g (5%), nickel powder 0.6g (2.5%), molybdenum powder 0.12g (0.5%), graphite powder 0.12 g (0.5%), ferrophosphorus powder 0.12g (0.5%) and densifier COM-XZ5 0.24g (1%).

[0027] The preparation method of the ...

Embodiment 2

[0034] The high-strength anti-friction double-layer iron-based powder metallurgy material in this embodiment is composed of a surface layer material and a matrix material, and the thickness of the surface layer material is 2 / 5 of the thickness of the double-layer iron-based powder metallurgy material.

[0035] The raw materials of the surface material are constituted by mass percentage: reduced iron powder 9.84g (82%), copper powder 1.2g (10%), nickel powder 0.3g (2.5%), molybdenum powder 0.06g (0.5%), graphite powder 0.06 g (0.5%), ferrophosphorus powder 0.06g (0.5%), titanium hydride powder 0.36g (3%) and zinc stearate powder 0.12g (1%).

[0036]The raw materials of the matrix material are constituted by mass percentage: reduced iron powder 16.78g (93.2%), copper powder 0.9g (5%), nickel powder 0g (0%), molybdenum powder 0.04g (0.2%), graphite powder 0.09g (0.5%), ferrophosphorus powder 0.09g (0.5%) and densifier Best-1000 0.11g (0.6%).

[0037] The preparation method of th...

Embodiment 3

[0040] The high-strength anti-friction double-layer iron-based powder metallurgy material in this embodiment is composed of a surface layer material and a matrix material, and the thickness of the surface layer material is 3 / 5 of the thickness of the double-layer iron-based powder metallurgy material.

[0041] The raw materials of the surface material are constituted by mass percentage: reduced iron powder 14.4g (80%), copper powder 1.8g (10%), nickel powder 0.45g (2.5%), molybdenum powder 0.09g (0.5%), graphite powder 0.09 g (0.5%), ferrophosphorus powder 0.09g (0.5%), titanium hydride powder 0.9g (5%) and zinc stearate powder 0.18g (1%).

[0042] The raw materials of the base material are constituted by mass percentage: reduced iron powder 11.17g (93.1%), copper powder 0.6g (5%), nickel powder 0g (0%), molybdenum powder 0.02g (0.2%), graphite powder 0.06g (0.5%), ferrophosphorus powder 0.06g (0.5%) and densifier COM-XZ5 0.04g (0.3%) and Best-1000 0.05g (0.4%).

[0043] The ...

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Abstract

The invention discloses a high-strength antifriction double-layered iron base powder metallurgy material and a preparation method thereof. The preparation method comprises the following steps that a densification enhancer is mixed in a matrix, so that a matrix material is dense and high in strength; a compound pore-forming agent is mixed in a surface layer to enable a surface layer material to be porous and oil-bearing, and besides, the requirements on the hardness and the wear resistance of the surface layer are met, and the contact interface and the lubricating condition of a friction pair are kept stable, so that the novel high-strength antifriction double-layered iron base powder metallurgy material is prepared. The bearing property, the wear resistance and the antifriction anti-seizing property of the iron base powder metallurgy material are improved remarkably, and high strength and a high lubricating property are effectively combined.

Description

1. Technical field [0001] The invention relates to an iron-based powder metallurgy material and a preparation method thereof, in particular to a high-strength friction-reducing double-layer iron-based powder metallurgy material and a preparation method thereof, belonging to the technical field of metal material powder metallurgy. 2. Background technology [0002] Iron-based powder metallurgy materials have high strength, hardness, and good wear resistance, and have been widely used in the fields of sliding bearings, auto parts, and hydraulic components. However, with the development of modern industry, iron-based powder metallurgy parts often have problems of insufficient hardness and strength in some occasions that require high performance. Although the mechanical properties can be improved by increasing the product density, the porosity and oil content of the material The rate decreases accordingly, the oil-containing self-lubrication performance deteriorates, and the surf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/02B22F1/00C22C38/16C22C38/08C22C38/12C22C38/14
CPCC22C38/002C22C38/08C22C38/12C22C38/14C22C38/16B22F7/02B22F2998/10B22F2999/00B22F1/10B22F3/26B22F2201/20B22F3/1007B22F3/02
Inventor 尹延国张国涛刘振明尹利广
Owner HEFEI UNIV OF TECH
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