Silicon-containing copper impregnation agent and preparation method thereof

A technology for silicon infiltration and copper powder, applied in the field of silicon-containing copper infiltration agent and its preparation, can solve the problems of unsuitability for mass production, poor product consistency and interchangeability, and low product precision, and achieve the effect of good infiltration effect.

Inactive Publication Date: 2020-04-17
WUXI HENGTELI METAL PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Products produced by ordinary powder metallurgy process have low finished product density, especially some parts cause sintering deformation, resulting in low product precision, poor product consistency and interchangeability, and are not suitable for mass production; and the product has low strength and poor surface finish

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A silicon-containing copper infiltrating agent, its composition includes: 2.6% iron, 0.3% silicon, 2.8% carbon and the balance of copper, wherein the raw material of iron is reduced iron powder, the raw material of silicon is silicon powder, carbon The raw material is carbon powder, and the copper raw material is electrolytic copper powder.

[0020] The electrolytic copper powder has a particle size of less than 100 mesh and a bulk density of 2.0 g / cm3.

[0021] The reduced iron powder has a particle size of less than 150 mesh.

[0022] The silicon powder has a particle size of less than 200 mesh.

[0023] The carbon powder has a particle size of less than 200 mesh.

[0024] A preparation method of silicon-containing copper-seeding agent, the method steps are as follows:

[0025] (1) Weigh electrolytic copper powder: 94.3kg, reduced iron powder: 2.6kg, silicon powder: 0.3kg, carbon powder: 2.8kg, according to the ratio of ball to material 1:20, add 5kg of alumina cer...

Embodiment 2

[0029] A silicon-containing copper infiltrating agent, its composition includes: 4.7% iron, 1.4% silicon, 5.3% carbon and the balance of copper, wherein the raw material of iron is reduced iron powder, the raw material of silicon is silicon powder, carbon The raw material is carbon powder, and the copper raw material is electrolytic copper powder.

[0030] The electrolytic copper powder has a particle size of less than 100 mesh and a bulk density of 2.0 g / cm3.

[0031] The reduced iron powder has a particle size of less than 150 mesh.

[0032] The silicon powder has a particle size of less than 200 mesh.

[0033] The carbon powder has a particle size of less than 200 mesh.

[0034] A preparation method of silicon-containing copper-seeding agent, the method steps are as follows:

[0035] (1) Weigh electrolytic copper powder: 88.6kg, electrolytic iron powder: 4.7kg, ferrosilicon powder: 1.4kg, carbon powder: 5.3kg, according to the ball material ratio 1:20, add 5kg zirconia c...

Embodiment 3

[0039] A silicon-containing copper infiltrating agent, its composition includes: 3.2% iron, 0.8% silicon, 4.1% carbon and the balance of copper, wherein the raw material of iron is carbonyl iron powder, the raw material of silicon is silicon powder, carbon The raw material is carbon powder, and the copper raw material is atomized copper powder.

[0040] The atomized copper powder has a particle size of less than 100 mesh and a bulk density of 2.0 g / cm3.

[0041] The carbonyl iron powder has a particle size of less than 700 mesh.

[0042] The silicon powder has a particle size of less than 200 mesh.

[0043] The carbon powder has a particle size of less than 200 mesh.

[0044] A preparation method of silicon-containing copper-seeding agent, the method steps are as follows:

[0045] (1) Weigh atomized copper powder: 91.9kg, carbonyl iron powder: 3.2kg, silicon powder: 0.8kg, carbon powder: 4.1kg, according to the ratio of ball to material 1:20, add 5kg of stainless steel ball...

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Abstract

The invention discloses a silicon-containing copper impregnation agent and a preparation method thereof, and belongs to the technical field of powder metallurgy. The copper impregnation agent comprises the following components of, in percentage by mass, 2.6%-4.7% of iron, 0.3%-1.4% of silicon, 2.8%-5.3% of carbon and the balance copper. The preparation method comprises the following steps of weighing raw materials according to the ratio, adding ceramic balls or stainless steel balls and a diffusion promoter, mixing, sending powder into a hydrogen reduction furnace for diffusion at 300 DEG C-1000 DEG C for 0.5-25 hours, cooling, discharging, crushing, screening, collecting, adding a lubricant and blending. The prepared copper infiltration agent has the advantages of being good in formability, high in infiltration efficiency, free of erosion, low in residue and capable of remarkably improving the density and the mechanical property of materials. The method is simple in process, requiredequipment is easy to operate, and batch production can be achieved.

Description

technical field [0001] The invention relates to the field of metallurgical materials, in particular to a silicon-containing copper seeping agent and a preparation method thereof. Background technique [0002] At present, due to its low cost and easy processing, powder metallurgy sintered steel parts are more and more widely used in industrial production, especially in the automotive machinery industry. Commonly used sintered steel gears, cams, valve seats, exhaust valve seats, etc. , when these parts are in service in some harsh environments, they are required to have good wear resistance and impact resistance, while maintaining high strength and hardness. However, the powder metallurgy sintered steel parts manufactured by the conventional pressing-sintering process cannot reach a completely dense state during the pressing process, and the residual pores as a defect affect its tensile strength, impact toughness, fatigue strength and hardness. And other properties, so that i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/26C22C9/00C23C10/30
CPCB22F3/26C22C9/00C23C10/30B22F1/10
Inventor 邹勇平吕廷镇
Owner WUXI HENGTELI METAL PROD
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