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Iron-base sintered and vulcanized material, preparing method thereof, iron-base side plate and oil distribution disc

A technology of iron-based sintering and sintering materials, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., and can solve problems such as occlusion, adhesive wear on the surface of friction pairs, etc.

Active Publication Date: 2020-01-31
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

However, with the development of modern industry, in some occasions that require high friction performance, iron-based powder metallurgy parts often appear on the surface of the friction pair, which is prone to adhesive wear or even seizure.

Method used

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  • Iron-base sintered and vulcanized material, preparing method thereof, iron-base side plate and oil distribution disc
  • Iron-base sintered and vulcanized material, preparing method thereof, iron-base side plate and oil distribution disc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weighing: Weigh 100 parts of reduced iron powder, 10 parts of copper powder, 0.7 parts of graphite, 0.6 parts of zinc stearate, and 0.05 parts of spindle oil according to the weight ratio;

[0028] Mixing: Use double cone mixer to mix evenly;

[0029] Pressing: Pressing density is 6.6g / cm 3 The wafer sample;

[0030] Sintering: Sintering at 1100°C for 30 minutes; sintered material is prepared;

[0031] Coating: by sieving, evenly spread the sulfur powder on the surface of the sintered material to obtain the coating material; the amount of sulfur accounts for about 20% of the porosity;

[0032] Vulcanization: Place the coating material at a temperature of 118°C for 100 minutes in an argon atmosphere to allow sulfur to enter the pores of the sintered material to obtain the sintered vulcanized material;

[0033] Sample preparation: The vulcanized material is made into test specimens.

Embodiment 2

[0035] Weighing: Weigh 100 parts of reduced iron powder, 15 parts of copper powder, 0.6 parts of graphite, 0.6 parts of zinc stearate, and 0.05 parts of spindle oil by weight;

[0036] Mixing: Use double cone mixer to mix evenly;

[0037] Pressing: Pressing a disc sample with a density of 6.4g / cm3;

[0038] Sintering: Sintering at 1110°C for 30 minutes; sintered material is prepared;

[0039] Coating: through sieving, the sulfur liquid is sprayed on the surface of the sintered material to obtain the coating material; the amount of sulfur accounts for about 80% of the porosity;

[0040] Vulcanization: Place the coating material at a temperature of 130°C for 40 minutes in an air atmosphere to allow sulfur to enter the pores of the sintered material to obtain a sintered vulcanized material;

[0041] Sample preparation: The vulcanized material is made into test specimens.

[0042] The metallographic structure of the vulcanized material prepared in Example 2 after being corroded by a 2% nitric...

Embodiment 3

[0044] Weighing: Weigh 100 parts of reduced iron powder, 8 parts of copper powder, 0.7 parts of graphite, 0.5 parts of zinc stearate, and 0.07 parts of spindle oil according to the weight ratio;

[0045] Mixing: Use double cone mixer to mix evenly;

[0046] Pressing: Pressing a disc sample with a density of 6.8g / cm3;

[0047] Sintering: Sintering at 1100°C for 30 minutes; sintered material is prepared;

[0048] Coating: by sieving, evenly spread the sulfur powder on the surface of the sintered material to obtain the coating material; the amount of sulfur accounts for about 40% of the porosity;

[0049] Vulcanization: Place the coating material at a temperature of 160°C for 20 minutes in a nitrogen atmosphere to allow sulfur to enter the pores of the sintered material to obtain a sintered vulcanized material;

[0050] Sample preparation: The vulcanized material is made into test specimens.

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Abstract

The invention provides an iron-base sintered and vulcanized material. The material compositions of the iron-base sintered and vulcanized material include Fe, Cu and S, and Cu2S exists in the microscopic structure. The invention further provides a preparing method of the iron-base sintered and vulcanized material. Raw materials are mixed, pressed and sintered, the surface of a sintered material iscoated with sulfur in a coated mode, the material is put at a temperature higher than the melting point of the sulfur for heat preservation so that the sulfur can enter pores of the sintered material,and then the sintered and vulcanized material is obtained. In the vulcanizing process, the sulfur with which the surface of the sintered material is coated enters the pores of the sintered material through heat preservation and reacts with Cu around the pores to generate Cu2S. The Cu2S is a friction reducing component and can improve the friction reducing effect of the sintered material and reduce the friction coefficient. Meanwhile, the invention further discloses a gear pump side plate, blade pump or plunger pump oil distribution disk prepared from the iron-base sintered and vulcanized material.

Description

Technical field [0001] The invention belongs to the field of powder metallurgy sintered materials, and in particular relates to iron-based sintered vulcanized materials, a preparation method thereof, and iron-based mechanical parts. Background technique [0002] As a common metal forming method, powder metallurgy technology has the characteristics of high material utilization rate, batch compression molding, and high production efficiency. Its products have been widely used in machinery, aviation and other fields. Among powder metallurgy materials, iron-based materials are the most used and widely used. [0003] Iron-based powder metallurgy materials have high strength, hardness and good wear resistance, and have been widely used in sliding bearings, auto parts and hydraulic components. However, with the development of modern industry, in some occasions that require high friction performance, iron-based powder metallurgy parts often have friction pairs that are prone to adhesive w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/62C22C33/02C22C38/16C22C38/60C22C38/08C22C38/12
CPCC22C33/0278C22C38/08C22C38/12C22C38/16C22C38/60C23C8/62
Inventor 李其龙徐伟张东汤浩王伟田清源
Owner 合肥波林新材料股份有限公司
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