Iron-based sintered vulcanized material and its preparation method, iron-based side plate and oil distribution plate

A technology of iron-based sintering and sintering materials, applied in metal material coating process, solid-state diffusion coating, coating and other directions, can solve the problems of occlusion, surface adhesion and wear of friction pairs, etc., to reduce friction factor and improve friction reduction effect. Effect

Active Publication Date: 2021-09-24
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-based sintered vulcanized material and its preparation method, iron-based side plate and oil distribution plate
  • Iron-based sintered vulcanized material and its preparation method, iron-based side plate and oil distribution plate

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 part of graphite, 0.6 part of zinc stearate, and 0.05 part of spindle oil by weight;

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

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

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

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

[0032] Vulcanization: Put the coated material at a temperature of 118°C, keep it warm for 100 minutes, and use an argon atmosphere to allow sulfur to enter the pores of the sintered material to obtain a sintered vulcanized material;

[0033] Sample preparation: make the vulcanized material as a test sample block.

Embodiment 2

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

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

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

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

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

[0040] Vulcanization: put the coated material at a temperature of 130°C, keep it warm for 40 minutes, and use an air atmosphere to allow sulfur to enter the pores of the sintered material to obtain a sintered vulcanized material;

[0041] Sample preparation: make the vulcanized material as a test sample block.

[0042] The metallographic structure diagram of the vulcanized material prepared in this embo...

Embodiment 3

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

[0045] Mixing: Use a 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; prepared sintered material;

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

[0049] Vulcanization: put the coated material at a temperature of 160°C, keep it warm for 20 minutes, and use a nitrogen atmosphere to allow sulfur to enter the pores of the sintered material to obtain a sintered vulcanized material;

[0050] Sample preparation: make the vulcanized material as a test sample block.

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Abstract

The invention provides an iron-based sintered vulcanized material, the material composition of which includes Fe, Cu, S, and Cu exists in the microstructure 2 S. It also provides a preparation method for iron-based sintered vulcanized materials. The raw materials are mixed, pressed, and sintered, and sulfur is coated on the surface of the sintered material by coating, and placed at a temperature higher than the melting point of sulfur. Into the pores of the sintered material, the sintered vulcanized material is obtained. In the vulcanization process, the sulfur coated on the surface of the sintered material enters the pores of the sintered material after heat preservation, and reacts with Cu around the pores to form Cu 2 S. while Cu 2 S is an anti-friction component, which can improve the anti-friction effect of the sintered material and reduce the friction factor. At the same time, it also discloses a gear pump side plate, a vane pump or a plunger pump oil distribution plate made of iron-based sintered 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 process has the characteristics of high material utilization rate, batch molding and high production efficiency. Its products have been widely used in machinery, aviation and other fields. Among the powder metallurgy materials, iron-based materials are the most used and widely used. [0003] Iron-based powder metallurgy materials have high strength and hardness and good wear resistance, and have been widely used in the fields of 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 adhesive wear or even seizure on...

Claims

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Application Information

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Patent Type & Authority Patents(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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