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Powder metallurgy horizontal gear and preparation method thereof

A powder metallurgy and gear technology, which is applied in the field of powder metallurgy flat gears and its preparation, can solve the problems of poor mechanical properties, uneven density of parts, uneven density of green bodies, etc., to improve material utilization and productivity , increase the self-lubricating performance, the effect of uniform density

Active Publication Date: 2013-08-07
ANHUI HENGJUN POWDER METALLURGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing powder metallurgy parts, due to the different proportions of various raw materials in the formula, it is difficult to ensure uniform mixing during mixing, resulting in uneven density of the pressed green body. After heat treatment, the overall density of the obtained parts is uneven. lead to poor mechanical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0020] Examples Weigh the following raw materials (kg): iron powder 100, copper powder 1.9, molybdenum powder 0.6, vanadium powder 0.2, nickel powder 1.0, graphite powder 0.7, modified tree ash 0.2, rare earth ferrosilicon alloy 0.5, Cr powder 0.2, ethylene Bis stearic acid amide 0.15, WS2 0.2, yttrium powder 0.3, boron nitride 0.3, zinc oxide 0.45, the grade of the rare earth ferrosilicon alloy is FeSiRE23, particle size 5-20 mm,

[0021] The preparation method comprises the following steps:

[0022] (1) First put 40-50% of the base iron powder into the high-speed mixer, add silane coupling agent KH-550 with a mass of 0.3-0.6% of the base iron powder, stir at high speed for 5-6 minutes, and then Add copper powder, molybdenum powder, vanadium powder, nickel powder, graphite powder, modified tree ash powder, Cr powder, ethylene bis stearic acid amide and the rest of the iron powder in turn, and heat while mixing at high speed. When it reaches 125-130°C, add all the other compo...

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PUM

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Abstract

The invention provides a powder metallurgy horizontal gear which is formed by compressing the following power stocks in part by weight: 100 parts of iron powder, 1.8 to 2.0 parts of copper powder, 0.5 to 0.8 part of molybdenum powder, 0.1 to 0.3 part vanadium powder, 0.8 to 1.2 part of nickel powder, 0.5 to 0.8 parts of graphite powder, 0.1 to 0.3 part of modified wood ash, 0.2 to 0.6 part of rare earth ferrosilicon alloy, 0.1 to 0.3 part of Cr powder, 0.1 to 0.2 part of ethylene bis stearamide, 0.1 to 0.3 part of WS2, 0.2 to 0.4 part of yttrium powder, 0.2 to 0.4 part of boron nitride, and 0.4 to 0.5 part of zinc oxide. When in preparation, mixing the powder stocks stepwise firstly, and obtaining the finished product horizontal gear through compressing and manufacturing, sintering, heat treatment and surface treatment. The produced powder metallurgy horizontal gear has the advantages that the horizontal gear is good in abrasion resistance, high in strength and rigidity, good in machinability, is corrosion resistant and less susceptible to breakage, and has a long service life.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a powder metallurgy flat gear and a preparation method thereof. Background technique [0002] Powder metallurgy technology can produce parts requiring high dimensional accuracy and complex shapes in a shape very similar to the shape of the product, which can greatly reduce cutting costs. Therefore, powder metallurgy products are used in various fields as parts of various machines and devices. [0003] In general, iron-based powder mixed powder is formed by mixing alloy powder such as graphite powder and lubricant powder such as stearic acid and Cr powder with iron-based powder, and then the iron-based powder mixed powder is filled into a metal mold, Press molding to manufacture iron-based powder compacts (compact powders) for powder metallurgy. Among them, the iron-based powder can be divided into iron powder (pure iron powder, etc.), alloy steel powder, etc. according to t...

Claims

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Application Information

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IPC IPC(8): B22F5/08B22F1/00
Inventor 丁邦顺
Owner ANHUI HENGJUN POWDER METALLURGY TECH
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