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Preparation method of powder metallurgy gear with excellent performance

An excellent technology of powder metallurgy, applied in the field of powder metallurgy gear preparation, can solve the problems of wear resistance, poor strength and hardness, uneven overall density, etc., and achieve the advantages of improved strength and hardness, simple and convenient preparation method, and high hardness Effect

Inactive Publication Date: 2014-09-17
WUHU WATER PUMP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the shortcomings of the existing powder metallurgy parts in the prior art, such as uneven overall density, poor wear resistance, strength and hardness, and provide a method for preparing a powder metallurgy gear with excellent performance. Powder metallurgy gears not only reuse the waste from the metallurgical industry, but also improve the performance of the produced powder metallurgy gears through specific composition ratios and treatments

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A powder metallurgy gear with excellent performance in this embodiment, each component is composed of the following parts by mass: 1 kg of phenolic resin, 2 kg of methyl stearate, 1 kg of hydroxypropyl methylcellulose, 4 kg of fly ash, 1 kg of table salt, Starch 2kg, zinc stearate 3kg, alloy powder 240kg, carbon powder 2kg, vanadium-titanium magnetite concentrate 5kg, polyethylene glycol 3kg, gas ash 7kg, NaCO 3 1 kg.

[0031] It is worth noting that the above-mentioned phenolic resin is also called bakelite, and the methyl stearate in this embodiment is also called methyl octadecanoate, with a melting point of 37-41°C and a purity greater than 95%; the above-mentioned hydroxypropyl methyl Hypromellose, also known as hypromellose, is a non-ionic cellulose ether. It is white powder at room temperature. It is made from highly pure cotton cellulose and etherified under alkaline conditions. The pass rate of propyl methylcellulose added to 200 mesh sieve is 75%.

[0032] T...

Embodiment 2

[0052] The basic content of the present embodiment is the same as that of Example 1, except that each component is composed of the following parts by mass: phenolic resin 2kg, methyl stearate 3kg, hydroxypropyl methylcellulose 2kg, fly ash 5kg , salt 1kg, starch 3kg, zinc stearate 4kg, alloy powder 250kg, carbon powder 2kg, vanadium-titanium magnetite concentrate 6kg, polyethylene glycol 4kg, gas ash 8kg, NaCO 3 2kg.

[0053] A method for preparing a powder metallurgy gear with excellent performance of the present invention, the steps are:

[0054] Step 1: Mix and Stir

[0055] (1) Add 2kg of phenolic resin, 3kg of methyl stearate, 2kg of hydroxypropyl methylcellulose, 5kg of fly ash, 1kg of salt and 3kg of starch into a blender and mix evenly to obtain mixture A;

[0056] (2) Add 4kg of the above-mentioned zinc stearate, 250kg of alloy powder, 2kg of carbon powder, 6kg of vanadium-titanium magnetite concentrate and 4kg of polyethylene glycol into a blender and mix evenly to...

Embodiment 3

[0068] The basic content of this embodiment is the same as that of Example 1, and the difference is that each component is composed of the following parts by mass: 1 kg of phenolic resin, 2 kg of methyl stearate, 1 kg of hydroxypropyl methylcellulose, and 3 kg of fly ash , salt 1kg, starch 1kg, zinc stearate 2kg, alloy powder 230kg, carbon powder 2kg, vanadium-titanium magnetite concentrate 4kg, polyethylene glycol 3kg, gas ash 6kg, NaCO 3 1kg.

[0069] A method for preparing a powder metallurgy gear with excellent performance of the present invention, the steps are:

[0070] Step 1: Mix and Stir

[0071] (1) Add 1kg of phenolic resin, 2kg of methyl stearate, 1kg of hydroxypropyl methylcellulose, 3kg of fly ash, 1kg of salt and 1kg of starch into a blender and mix evenly to obtain mixture A;

[0072] (2) Add 2kg of the above-mentioned zinc stearate, 230kg of alloy powder, 2kg of carbon powder, 4kg of vanadium-titanium magnetite concentrate and 3kg of polyethylene glycol into...

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Abstract

The invention discloses a preparation method of a powder metallurgy gear with excellent performance and belongs to the technical field of powder metallurgy. The method comprises the steps that 1, mixing and stirring; 2, pressing and forming: powder metallurgy mixture is placed in a pressing machine, and the mixture is pressed into green body pieces; 3, sintering: the green body pieces are placed into a sintering furnace to be sintered; 4, heat treatment: the workpieces obtained from the step 3 are quenched and then tempered, and the workpieces are subjected to carbonitriding in a carburizing furnace, the workpieces are cooled to room temperature, and finished products are obtained by finish machining. According to the preparation method of the powder metallurgy gear with the excellent performance, the rigidity and the intensity of the tooth surface of the produced gear are improved by specific composition proportion, the abrasive resistance is enhanced, coal ash and gas ash are used as specific components of the powder metallurgy gear, and metallurgy waste is subjected to resource utilization.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a method for preparing a powder metallurgy gear with excellent performance. Background technique [0002] Gears are wheel-shaped mechanical parts that rely on the meshing of teeth to transmit torque reliably and without noise. Through transmission with other toothed mechanical parts, gears can achieve functions such as changing speed and torque, changing motion direction, and changing motion form. At present, gear transmission has become the most widely used transmission method. [0003] 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. Especially in the field of gear manufacturing, gear manufacturing by powder metallurgy is an efficient, precise and flexible metal processing technology, which is suitable for mass production o...

Claims

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Application Information

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IPC IPC(8): B22F5/08B22F3/16B22F1/00
Inventor 唐爱军
Owner WUHU WATER PUMP MFG
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