Powder metallurgy gear disk and manufacturing method thereof

Abstract

The invention discloses a powder metallurgy gear disk. The powder metallurgy gear disk is characterized by being manufactured from, by weight, 1.2-1.3 parts of Ni, 2.3-2.4 parts of Mo, 0.3-0.4 part of Cu, 0.5-0.6 part of Bi, 0.1-0.14 part of Tb, 2.1-2.3 parts of Al, 1.4-1.5 parts of Sn, 3.2-3.4 parts of zinc stearate, 92-94 parts of iron powder and 1-2 parts of auxiliaries. The manufactured gear disk is compact in organization, good in microstructure, very few in pore, excellent in structural rigidity, hardness, fatigue resistance and tensile strength performance, easy to produce and operate, suitable for automatic production, high in production efficiency, good in practicability and economic prospect, and capable of producing good social benefits.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a powder metallurgy gear disc 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 be ...

AI Technical Summary

Problems solved by technology

[0004] The production method of powder metallurgy gear discs is generally completed by forming, sintering, heat treatment, pressing, etc., but for powder metallurgy gear disc shafts that require high pull-out force, small flange length, and small shaft-to-edge wall thickness (less than 1.5mm) For gear discs, the normal process can no longer meet the production requirements. In many cases, it is necessary to increase the press-fitting amount of the shaft and the hole to increase the pull-out force of the shaft. In this way, there is a risk of cracking in the final shaft area of ​​the product, and other performances of the product also reach Less than the usage requirements