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Copper-based powder metallurgy plunger pump oil distribution disc material and preparation method thereof

A copper-based powder and plunger pump technology, which is applied in metal processing equipment, pump components, mechanical equipment, etc., can solve the problems that the mechanical strength of the copper alloy surface cannot meet the requirements, and cannot meet the requirements of the plunger pump, so as to improve the material Utilization rate, good tribological properties, good effect on friction and wear performance

Inactive Publication Date: 2021-03-26
合肥波林新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to meet this requirement, the currently used process is powder spreading and sintering followed by rolling. However, the mechanical strength of the copper alloy surface produced by this process cannot meet the requirements. Due to the insufficient hardness of the material surface, under the instantaneous impact load , the copper alloy surface bites and scratches quickly, which cannot meet the requirements of the plunger pump

Method used

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  • Copper-based powder metallurgy plunger pump oil distribution disc material and preparation method thereof
  • Copper-based powder metallurgy plunger pump oil distribution disc material and preparation method thereof
  • Copper-based powder metallurgy plunger pump oil distribution disc material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Mixing: take by weight 3% nickel, 10% tin, 4% lead, 0.55% paraffin, 0.5% zinc stearate, and the balance is that copper powder is mixed to obtain copper-based mixed powder;

[0029] (2) Press forming: send the copper-based mixed powder into the hopper of the press and send it into the cavity of the mold through the feeding shoe for pressing, at a rate of 550MPa / cm 2 The pressure is pressed and formed to obtain a copper matrix compact with a compact density of 7.82g / cm 3 ;

[0030] (3) Sintering: Place the copper-plated steel plate on the top of the copper matrix compact, and put the whole into a sintering furnace for sintering. The sintering temperature is 890°C, and the sintering time is 60 minutes. 15% hydrogen is used as the reducing gas and 85% hydrogen is used as the reducing gas. Nitrogen is used as a protective atmosphere to obtain a copper alloy sintered compact;

[0031] (4) Shaping: put the copper alloy sintered billet into the cemented carbide mold, use ...

Embodiment 2

[0036] (1) Mixing: take by weight 2% nickel, 8% tin, 3% lead, 0.4% paraffin, 0.4% zinc stearate, and the balance is that copper powder is mixed to obtain copper-based mixed powder;

[0037] (2) Press forming: send the copper-based mixed powder into the hopper of the press and send it into the cavity of the mold through the feeding shoe for pressing, at a rate of 500MPa / cm 2 The pressure is pressed and formed to obtain a copper matrix compact with a compact density of 7.74g / cm 3 ;

[0038] (3) Sintering: Place the copper-plated steel plate on the top of the copper matrix compact, and put the whole into a sintering furnace for sintering. The sintering temperature is 890°C, and the sintering time is 60 minutes. 15% hydrogen is used as the reducing gas and 85% hydrogen is used as the reducing gas. Nitrogen is used as a protective atmosphere to obtain a copper alloy sintered compact;

[0039] (4) Shaping: Put the copper alloy sintered billet into the cemented carbide mold, use 60...

Embodiment 3

[0043] (1) Mixing: take by weight 4% nickel, 12% tin, 5% lead, 0.6% paraffin, 0.65% zinc stearate, and the balance is that copper powder is mixed to obtain copper-based mixed powder;

[0044] (2) Press forming: send the copper-based mixed powder into the hopper of the press and send it into the cavity of the mold through the feeding shoe for pressing, at a rate of 600MPa / cm 2 The pressure is pressed and formed to obtain a copper matrix compact with a compact density of 8.0g / cm 3 ;

[0045] (3) Sintering: Place the copper-plated steel plate on the top of the copper substrate compact, and put the whole into a sintering furnace for sintering. The sintering temperature is 920°C, and the sintering time is 40 minutes. 15% hydrogen is used as the reducing gas and 85% Nitrogen is used as a protective atmosphere to obtain a copper alloy sintered compact;

[0046] (4) Shaping: put the copper alloy sintered billet into the cemented carbide mold, use 700MPa / cm 2 Finishing by shaping pres...

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Abstract

The invention discloses a copper-based powder metallurgy plunger pump oil distribution disc material and a preparation method thereof. The preparation method comprises the steps that 2%-4% of nickel,8.0%-12.0% of tin, 3%-5% of lead, 0.4%-0.65% of binder, 0.4%-0.6% of lubricant and the balance copper powder are obtained according to the weight ratio and mixed to obtain copper-based mixed powder; and then compression molding, sintering, shaping, distressing and machining are sequentially carried out to obtain a finished product. The metallographic structure of the material prepared through themethod is mainly a high-temperature equiaxed single-phase structure, a copper-tin compound and elemental lead are distributed at a grain boundary, the copper-tin compound can improve the strength andhardness of the material and play a role in abrasion resistance, and the elemental lead plays a role in abrasion reduction, so that a very good using effect is achieved; the material prepared throughthe method has better tribological characteristics and better fatigue wear resistance and adhesive wear resistance; and the preparation method is simple in process, high in production efficiency and low in processing cost.

Description

technical field [0001] The invention belongs to the field of engineering machinery plunger pump parts, and in particular relates to a copper-based powder metallurgy plunger pump oil distribution plate material and a preparation method thereof. Background technique [0002] The plunger pump is the key power component in the hydraulic system of construction machinery. The friction pair material is its key part. Its wear resistance directly determines the performance and life of the plunger pump. The oil distribution plate and the sliding shoe of the plunger pump form a pair Friction pair, in the high-low pressure transition area, the oil distribution plate of the plunger pump and the sliding shoe relatively moving surface are subjected to instantaneous impact force, causing abrasions, resulting in adhesive wear and failure of the whole pump, which requires the oil distribution plate to have high wear resistance damage performance. In order to meet this requirement, the curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/16B22F3/24B22F3/10C22C9/02F04B53/00
CPCB22F3/164B22F3/1007B22F3/24C22C9/02F04B53/00B22F2003/166B22F2003/248B22F2998/10B22F1/10B22F2003/247B22F3/02
Inventor 张东马志伟汤浩张俊杰程卫马菊
Owner 合肥波林新材料股份有限公司
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