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Method for manufacturing transmission oil pump rotor

A gearbox and oil pump technology, applied in the field of powder metallurgy, can solve problems such as unfavorable material properties, and achieve the effects of promoting growth, improving yield strength and impact strength, and improving material properties

Inactive Publication Date: 2016-08-24
顾晓峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process of forming FeBX requires the participation of hydrogen, so the yield strength of the material increases first and then decreases with the increase of boron content. Excessive boron content is not conducive to the improvement of material properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The present invention is a method for manufacturing a gearbox oil pump rotor, the method comprising the following steps:

[0018] Step 1: Prepare materials according to the mass ratio of 3% copper borate, 0.3% graphite powder, 0.5% copper powder, 0.55% zinc stearate lubricant, and iron powder as the balance;

[0019] Step 2: Put the prepared materials in a double-cone mixer and mix at a speed of 19-21rmp / min for 30-35min;

[0020] Step 3: placing the mixed material in a mold, and press molding with a pressure of 500Mpa to obtain a part compact;

[0021] Step 4: Sintering the compact at a temperature of 1120° C. under a protective gas for 5 hours to obtain a finished product. Among them, the protective gas composition is H 2 O: 7.5%, CH 4 : 0.1%, the balance is N 2 .

Embodiment 2

[0023] The present invention is a method for manufacturing a gearbox oil pump rotor, the method comprising the following steps:

[0024] Step 1: Prepare materials according to the mass ratio of 0.3% copper borate, 0.6% graphite powder, 1.5% copper powder, 0.6% zinc stearate lubricant, and iron powder as the balance;

[0025] Step 2: Put the prepared materials in a double-cone mixer and mix for 30-35 minutes at a speed of 19-21rmp / min;

[0026] Step 3: Put the mixed material in a mold, press and form it with a pressure of 580Mpa, and make a part compact;

[0027] Step 4: Sintering the compact at a temperature of 1120° C. under a protective gas for 5 hours to obtain a finished product. Among them, the protective gas composition is H 2 O: 8.5%, CH 4 : 0.4%, the balance is N 2 .

Embodiment 3

[0029] The present invention is a method for manufacturing a gearbox oil pump rotor, the method comprising the following steps:

[0030] Step 1: Prepare materials according to the mass ratio of copper borate 2%, graphite powder 0.5%, copper powder 1%, zinc stearate lubricant 0.65%, and iron powder as the balance;

[0031] Step 2: Put the prepared materials in a double-cone mixer and mix for 30-35 minutes at a speed of 19-21rmp / min;

[0032] Step 3: placing the mixed material in a mold, and press molding with a pressure of 600Mpa to obtain a part compact;

[0033] Step 4: Sintering the compact at a temperature of 1120° C. under a protective gas for 5 hours to obtain a finished product. Among them, the protective gas composition is H 2 O: 8%, CH 4 : 0.3%, the balance is N 2 .

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PUM

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Abstract

The invention discloses a method for manufacturing a transmission oil pump rotor. The method comprises the following steps: a material is prepared by components in percentage by mass, wherein the components comprise 0.2-3% of copper borate, 0.3-0.6% of graphite powder, 0.5-1.5% of copper powder, 0.55-0.65% of lubricating agent and the balance of iron powder; the prepared material is put in a double-cone mixer for mixing by 30-35 min at a rotating speed of 19-21 rmp / min; the mixed material is put in a mold under a certain pressure for pressing to obtain a pressing blank; and the pressing blank is sintered by 5 hours under protective gas at a temperature of 1120 DEG C to obtain a finished product. Compared with adding of boron stearate as a carrying agent of boron, the performance of the material is preferably improved through adding copper borate as a carrying agent of B.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a method for manufacturing a gearbox oil pump rotor. Background technique [0002] The effect of boron (B) on the pearlite refinement of steel and the improvement of the impact strength at medium and low temperatures is far greater than that of Ni and Mo. The content of alloying elements required to achieve the same strengthening effect is very low. The promotion of use can save a lot of expensive alloying elements for the country . And in some special purposes, such as not requiring high surface hardness, but requiring high wear resistance and impact strength, fine pearlite is the only structure that can be achieved. But common carrier FeB 17 C 0.1 The hardness is too high and the solid phase diffusion rate is too low to be used in powder metallurgy manufacturing. The strengthening method of B for dense steel materials is: adding ferroboron during the molten steel refining p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F5/00B22F3/16B22F1/00
Inventor 顾晓峰
Owner 顾晓峰
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