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A powder metallurgy automobile power steering pump stator and its preparation method

A technology of power steering and powder metallurgy, applied to other manufacturing equipment/tools, turbines, engine components, etc., can solve the problems of insufficient wear resistance, difficult processing, low density, etc., to increase wear resistance and lubrication High performance, excellent tensile strength, and the effect of ensuring vertical and horizontal uniformity

Active Publication Date: 2016-05-04
胜利油田利强机械配件有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the shape of the booster pump stator is complex, its processing is difficult, complicated and costly
It is produced by powder metallurgy process, but it is suspended because of low density (less than 6.8), low hardness (less than HRC30) and strength, wear resistance, etc. cannot meet the requirements

Method used

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Examples

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Embodiment Construction

[0016] specific implementation plan

[0017] The present invention will be described in detail below through specific examples.

[0018] A powder metallurgy automobile power steering pump stator, made of the following raw materials in parts by weight (kg): molybdenum 6.3, nickel 3.1, copper 0.5, graphite 1.1, zinc stearate 2.3, iron powder 92, Y1.2, Tm0. 5. Auxiliary 2;

[0019] The auxiliary agent is made of the following raw materials in parts by weight (kg): iron powder 30, kaolin 2, alum 1, nano-carbon 1, polyisobutylene 2, aluminate coupling agent DL-4111, sodium tripolyphosphate 2 , ricinoleic acid 1, aluminum nitride powder 2; the preparation method is to mix iron powder, kaolin, alum, and sodium tripolyphosphate, grind it into 200-300 mesh powder, and then add aluminate coupling agent DL-411 and mix evenly , pressed into a blank at 10-15Mpa, then sent to 920-950°C for calcination for 3-4 hours, after cooling, crushed into 300-400 mesh powder, mixed with other remaini...

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Abstract

The invention discloses a powder metallurgical automotive power steering pump stator which is characterized by being manufactured by the following materials by weight: 6.3-6.6 parts of molybdenum, 3.1-3.4 parts of nickel, 0.5-0.8 part of copper, 1.1-1.4 parts of graphite, 2.3-2.6 parts of hard-acid zinc glycinate, 92-94 parts of iron powder, 1.2-1.5 parts of Y, 0.5-0.8 part of Tm and 2-3 parts of auxiliaries. By adding the auxiliaries, the alloy powder is dispersed uniformly, vertical and horizontal uniformity of tissue structures in the product is ensured, and fatigue life of the product is prolonged. By adding the graphite, abrasive resistance and lubricity of the product are improved, and the product is good in microstructure, few in hole, and high in structural stiffness, hardness, fatigue resistance and tensile strength performance.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a stator of a power steering pump of a powder metallurgy automobile and a preparation method thereof. Background technique [0002] Automobile power steering pump is an important part of automobile steering. Among them, the stator is a key part of the booster pump, which directly affects the flow, pressure, noise and service life of the booster pump. At present, the stator of the power steering pump is generally produced with high alloy steel. Because the shape of the booster pump stator is complicated, its processing is difficult, complicated and costly. It is produced by powder metallurgy process, but it is suspended because of low density (less than 6.8), low hardness (less than HRC30) and strength, wear resistance, etc. cannot meet the requirements. [0003] Powder metallurgy is an industrial technology for producing metal powder or using metal powder (or a mixture of meta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/16B22F5/00
Inventor 胡光荣
Owner 胜利油田利强机械配件有限责任公司
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