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Powder metallurgy bearing material and preparation method thereof

A bearing material and powder metallurgy technology, applied in the field of powder metallurgy, can solve the problems of reducing impact toughness and fatigue strength, increasing carbide inhomogeneity, reducing hardness and dimensional stability, etc.

Inactive Publication Date: 2014-01-29
WUHU HONGKUN AUTO PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But when the chromium content exceeds 1.65%, it will increase the residual austenite in the steel after quenching, reduce the hardness and dimensional stability, increase the inhomogeneity of carbides, and reduce the impact toughness and fatigue strength of the steel

Method used

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Experimental program
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Embodiment Construction

[0014] The present invention will be described in detail below through specific examples.

[0015] A powder metallurgy bearing material, made of the following raw materials in parts by weight: W5.2, Co2.1, Ni5.7, Ti1.2, B0.2, Fe72, silicon 3.2, graphite 1.2, manganese 1.7, chromium 5.2, Zinc stearate 2.3, microcrystalline wax 1.2, tungsten carbide 0.4, TiC0.2, additive 1;

[0016] The auxiliary agent is made of the following raw materials in parts by weight (kg): iron powder 4, zinc oxide 2, isopropyl distearoyloxyaluminate 1, kaolin 3, polyvinyl alcohol 3, carbon fiber 1, sulfuric acid Ferrous iron 3, sodium tripolyphosphate 1, mica powder 3, crosslinking agent TAIC 2, zinc stearate 1. The preparation method is to mix iron powder, zinc oxide, ferrous sulfate, sodium tripolyphosphate and mica powder, grind them into 200-300 mesh powder, then add isopropyl distearoyloxyaluminate and mix evenly, in 10 -15Mpa to press into a billet, then send it to 920-950°C for calcination for...

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PUM

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Abstract

The invention discloses a powder metallurgy bearing material. The powder metallurgy bearing material is characterized by being composed of, by weight, 5.2-5.5 parts of tungsten, 2.1-2.3 parts of cobalt, 5.7-5.9 parts of nickel, 1.2-1.5 parts of titanium, 0.2-0.5 part of boron, 72-75 parts of ferrum, 3.2-3.5 parts of silicon, 1.2-1.4 parts of graphite, 1.7-1.9 parts of manganese, 5.2-5.6 parts of chromium, 2.3-2.5 parts of zinc stearate, 1.2-1.4 parts of microcrystalline wax, 0.4-0.5 part of tungsten carbide, 0.2-0.4 part of titanium carbide and 1-2 parts of auxiliary agents. The graphite is added to raw materials of the powder metallurgy bearing material, so that abrasion resistance and lubricity of a bearing are enhanced, and the bearing made of the powder metallurgy bearing material is compact in structure and good in microstructure, has very few holes, and has excellent structural rigidity, hardness, fatigue resistance and tensile strength; addition of the nickel enhances toughness and the elasticity modulus of alloy, thereby playing a prominent role in guaranteeing geometric stability of the bearing.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a powder metallurgy bearing material and a preparation method thereof. Background technique [0002] Powder metallurgy is an industrial technology for producing metal powder or using metal powder (or a mixture of metal powder and non-metal powder) as raw material, forming and sintering to produce metal materials, composite materials and various types of products. At present, powder metallurgy technology has been widely used in transportation, machinery, electronics, aerospace, weapons, biology, new energy, information and nuclear industries, and has become one of the most dynamic branches of new material science. Powder metallurgy technology has a series of advantages such as significant energy saving, material saving, excellent performance, high product precision and good stability, and is very suitable for mass production. In addition, some materials and complex parts that can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/16C22C38/58
Inventor 黄浩
Owner WUHU HONGKUN AUTO PARTS
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