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Powder metallurgy bearing steel and preparation method thereof

A technology of powder metallurgy and bearing steel, applied in the field of powder metallurgy bearing steel and its preparation, to achieve the effect of good microstructure, less environmental pollution and simple production steps

Active Publication Date: 2014-01-29
GUANGXI SHENGLONG METALLURGICAL CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of improving rolling fatigue life with low oxidation has almost reached its limit

Method used

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Embodiment Construction

[0016] The present invention will be described in detail below through specific examples.

[0017] A powder metallurgy bearing steel made from the following raw materials in parts by weight (kg): graphite 0.2, silicon 0.1, manganese 3.1, chromium 6.7, copper 0.7, ditungsten boride 0.3, SnO 2 0.1 、V 2 o 5 0.4, Te0.1, ZrO 2 0.3, microcrystalline wax 3.2, iron powder 87, additive 1;

[0018] The additive is made of the following raw materials in parts by weight (kg): iron powder 3, kaolin 2, nano-carbon 2, zirconium fluoride 1, alum 2, sodium alginate 3, sodium tripolyphosphate 1, corundum powder 3, Copper sulfate 1, calcium stearate 1, vinyl triethoxysilane 3; the preparation method is to mix iron powder, kaolin, zirconium fluoride, alum, sodium alginate, sodium tripolyphosphate, corundum powder, copper sulfate, Grind it into 200-300 mesh powder, then add vinyltriethoxysilane and mix evenly, press it into a billet at 10-15Mpa, then send it to 920-950℃ for calcination for 3-...

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Abstract

The invention discloses powder metallurgy bearing steel and a preparation method thereof. The powder metallurgy bearing steel is prepared from 0.2-0.3 parts by weight of graphite, 0.1-0.2 parts by weight of silicon, 3.1-3.3 parts by weight of manganese, 6.7-6.9 parts by weight of chromium, 0.7-0.9 parts by weight of copper, 0.3-0.4 parts by weight of W2B, 0.1-0.2 parts by weight of SnO2, 0.4-0.45 parts by weight of V2O5, 0.1-0.2 parts by weight of Te, 0.3-0.4 parts by weight of ZrO2, 3.2-3.4 parts by weight of microcrystalline wax, 87-89 parts by weight of iron powder and 1-2 parts by weight of an assistant. Through use of graphite, bearing steel wear resistance and lubricity are improved. The powder metallurgy bearing steel has a compact and good microstructure, less apertures, good structural rigidity, good hardness, fatigue resistance and good tensile strength. The preparation method produces less pollution on the environment, has simple processes and improves production efficiency.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a powder metallurgy bearing steel 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 cannot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/38C22C33/02B22F1/00
Inventor 黄浩
Owner GUANGXI SHENGLONG METALLURGICAL CO LTD
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