Ferrum-based powder metallurgy antifriction material and preparation method thereof

Abstract

The invention discloses a ferrum-based powder metallurgy antifriction material and a preparation method thereof. The material is prepared from the following raw materials in part by weight: 60 to 64 parts of iron powder, 6 to 10 parts of tin powder, 3 to 6 parts of carborundum powder, 3 to 6 parts of molybdenum dioxide powder, 4 to 7 parts of zirconium corundum powder, 10 to 14 parts of quartz sand powder, 1 to 4 parts of zirconium dioxide powder, 2 to 5 parts of cobalt powder, 2 to 5 parts of alumina powder, 2 to 5 parts of feldspar powder and 1 to 4 parts of copper powder. The preparation method comprises the following steps of preparing and mixing the raw materials, pressing for forming, sintering and cooling. The ferrum-based powder metallurgy antifriction material prepared by the method has a high friction coefficient, can quickly absorb kinetic energy and brake, is high in transmission speed and low in abrasion, is high in strength, high temperature resistant and good in thermal conductivity, and is good in anti-seizure property, corrosion resistant, and slightly influenced by grease and damp.

Description

technical field [0001] The invention relates to a composite material, in particular to an iron-based powder metallurgy friction 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. Powder metallurgy has unique chemical composition and mechanical and physical properties, which cannot be obtained by traditional casting methods. The use of powder metallurgy technology can directly make porous, semi-dense or fully dense materials and products, such as oil bearings, gears, cams, guide rods, knives, etc., which is a less cutting process. Compared with traditional melting and casting methods, powder metallurgy has the following characteristics: [0003] (1) Powder metallurgy technology can minimize ...

AI Technical Summary

Problems solved by technology

Although the iron base has slightly higher hardness, strength and friction coefficient than the copper base, the allowable working specific pressure and surface instantaneous temperature are also higher; but the heat resistance coefficient is poor and the wear rate is high

If the wear rate is too large, the service life of the brake will be reduced; if the heat resistance coefficient is low, it will easily cause the friction material to be burned, the product will be damaged, and its performance will be lost.

However, the raw material formula and sintering process of powder metallurgy anti-friction materials in my country are still at a backward stage compared with foreign countries, which leads to low physical and technological properties of powder metallurgy anti-friction materials.

Compared with foreign technology, there is still a big gap