A process of powder metallurgy formula for belt pulley

A powder metallurgy and belt pulley technology, applied in the field of powder metallurgy, can solve the problems of excessive machining scraps of cast iron parts, easy belt wear and pulleys, and high noise in the use of pulleys, etc., and achieves the effect of less machining scraps, high product precision, and low operating noise.

Active Publication Date: 2017-07-07
ANHUI HENGJUN POWDER METALLURGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing pulleys are made of cast iron and then cut. Due to various factors, defects such as air holes, pinholes, slag inclusions, cracks, and pits often appear during the processing.
At the same time, there are many scraps in the processing of cast iron parts, large waste, high cost, low product precision, need to be balanced, the process is cumbersome, and the production efficiency is low.
Although there are also a few produced by powder metallurgy process, due to the limitations of its formula and process, the formula is not optimized enough, and the pulley products have the problem of too hard or too soft. Too hard leads to high brittleness of the pulley, large vibration, high noise in use of the pulley, and long service life. Problems such as shortness; too soft will cause the belt to easily wear the pulley, and the pulley will be easily deformed after long-term use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A pulley powder metallurgy formula, characterized in that it is composed of the following components in mass percentage: iron powder balance, graphite 0.3-0.7%, copper powder 1.5-2.5%, zinc stearate 0.6-1.0%, sulfur 0.1- 0.3%, nickel powder 0.3-1.5%, molybdenum powder 0.3-1.0%.

[0026] The iron powder is composed of 100 mesh water atomized iron powder and 100 mesh reduced iron powder. 50% of the iron powder is made by water atomization method, and the remaining iron powder is made by reduction method. After the iron powder made by these two methods is mixed, the density is 2.9g / cm 3 , the flow rate is 25s / 50g.

[0027] A pulley powder metallurgy formula, which is composed of the following components in mass percentage: iron powder balance, graphite 0.3%, copper powder 1.5%, zinc stearate 0.6%, sulfur 0.3%, nickel powder 0.3%, molybdenum powder 0.3% .

[0028] A pulley powder metallurgy formula, which is composed of the following components in mass percentage: iron p...

Embodiment 2

[0041] A powder metallurgy formula for a pulley, characterized in that it consists of the following components in mass percentages: iron powder balance, graphite 0.3-0.7%, copper powder 1.5-2.5%, zinc stearate 0.6-1.0%, sulfur 0.1- 0.3%, nickel powder 0.3-1.5%, molybdenum powder 0.3-1.0%.

[0042]The iron powder is composed of 100 mesh water atomized iron powder and 100 mesh reduced iron powder. 55% of the iron powder is made by water atomization method, and the remaining iron powder is made by reduction method. After the iron powder made by these two methods is mixed, the density is 2.7g / cm 3 , the flow rate is 30s / 50g.

[0043] A pulley powder metallurgy formula, which is composed of the following components in mass percentage: iron powder balance, graphite 0.3%, copper powder 1.5%, zinc stearate 0.6%, sulfur 0.3%, nickel powder 0.3%, molybdenum powder 0.3% .

[0044] A pulley powder metallurgy formula, which is composed of the following components in mass percentage: iro...

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Abstract

The invention discloses a pulley powder metallurgy formula, which is characterized in that it is composed of the following components in mass percentage: iron powder balance, graphite 0.3-0.7%, copper powder 1.5-2.5%, zinc stearate 0.6-1.0% , sulfur 0.1~0.3%, nickel powder 0.3~1.5%, molybdenum powder 0.3~1.0%; the invention also discloses a process for the powder metallurgy formula of the pulley, the process steps include: mixing, pressing, sintering, cooling, shaping, Degreasing, sandblasting, blackening and other steps. The technical process of the powder metallurgy formula of the belt pulley provided by the invention has reasonable formula, suitable hardness of the belt pulley, simplified process, high production efficiency and low production cost.

Description

technical field [0001] The invention relates to a process of powder metallurgy formula for a belt pulley, which belongs to the technical field of powder metallurgy. Background technique [0002] Powder metallurgy is a process technology for producing metal or using metal powder (or a mixture of metal powder and non-metal powder) as raw material, after forming and sintering, to manufacture metal materials, composite materials and various types of products. Due to the advantages of powder metallurgy technology, it has become the key to solve the problems of new materials and plays a pivotal role in the development of new materials. However, most of the existing pulleys are made of cast iron and then cut. Due to various factors, defects such as air holes, pinholes, slag inclusions, cracks, and pits often occur during the processing. At the same time, there are many scraps in the processing of cast iron parts, which leads to large waste, high cost, low product precision, and ne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F3/16B22F5/00C22C38/60
Inventor 詹晓明顾进文张克庆疏金平毕军
Owner ANHUI HENGJUN POWDER METALLURGY TECH
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