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Sintering method for powder metallurgy material gears

A technology of powder metallurgy and sintering method, which is applied in the field of powder metallurgy, can solve the problems of high energy consumption of machining process, difficult product processing size, inflexible allocation, etc., to achieve the improvement of sintering density and performance, improve uniformity, and promote element diffusion Effect

Inactive Publication Date: 2019-05-03
益阳市再超粉末冶金有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing transmission gears are machined with 40Cr material, and the 40Cr material components are fixed, and the price is high, and the components of the material itself cannot be flexibly adjusted according to the use environment to achieve performance suitable for use conditions.
In the prior art, transmission gears are generally obtained by purchasing 40Cr materials directly for machining, but the machining process has the disadvantages of high energy consumption, difficulty in precisely controlling the processing size of the processed products, and low product precision; moreover, the machining process requires A large number of raw materials are milled off, resulting in waste of materials and increasing production costs

Method used

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Embodiment Construction

[0024] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the examples.

[0025] A method for sintering powder metallurgy material gears, comprising the steps of:

[0026] (1) Prepare pre-diffusion powder, grind and mix iron, nickel, molybdenum, and titanium powder according to the formula ratio, after mixing evenly, under the protection of 50% hydrogen and 50% argon, carry out pre-diffusion treatment at 700 degrees Celsius for 50 minutes, cool After reaching room temperature, crush and pass through a 200-mesh sieve to obtain pre-diffusion powder;

[0027] (2) Mixing materials, put the above-mentioned pre-diffusion powder and the remaining materials into the ball mill, mix the materials for 30min, and mix well;

[0028] (3) Warm pressing, under the condition of 120°C, high-speed compression molding, impacting at a speed of 2m / s with a 1t pre...

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Abstract

The invention discloses a sintering method for powder metallurgy material gears. Under the condition of 600-800 DEG C, iron, nickel, molybdenum and titanium powder are pre-dispersed, so that the distribution uniformity of all elements is improved, and in particular, the distribution uniformity of TiC particles is improved; and remained graphite powder, lubricating agents and sintering aids are mixed for pressure stabilization under the condition of 60-120 DEG C, low-temperature sintering at 500-700 DEG C and high-temperature sintering at 900-1000 DEG C. The method is low in sintering temperature, uniform in distribution of the TiC particles, high in product density, high in hardness and high in bending strength.

Description

technical field [0001] The invention belongs to the field of powder metallurgy, in particular to a method for sintering gears made of powder metallurgy materials. Background technique [0002] Powder metallurgy technology is a material preparation process that uses metal powder (or a mixture of metal powder and non-metal powder) as a raw material to manufacture various types of products such as metal materials and composite materials through powder mixing, pressing and sintering. In the powder metallurgy production process, there is no need to melt the metal, which can save energy, and the product has high precision and high degree of production automation, so it is suitable for factory production. In recent years, it has attracted the attention of the industry. The advantages of material saving, energy saving and high production efficiency of powder metallurgy technology make it one of the technologies with great development potential in material science. It has been widely...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/02C22C38/08C22C38/12C22C38/14B22F3/14B22F1/00B22F5/08
Inventor 李建峰符人慧钟智超钟训华
Owner 益阳市再超粉末冶金有限公司
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