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Preparation method for reducing apparent density of copper-tin alloy powder

A technology of copper-tin alloy and bulk density, which is applied in the field of preparation of copper-tin alloy powder, can solve the problems of poor compactness and compression performance of applied products, and high bulk density, so as to reduce bulk density, improve sharpness and durability Abrasiveness and the effect of reducing oxidation time

Pending Publication Date: 2021-11-02
江苏萌达新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the traditional preparation method of copper-tin alloy powder is generally the atomization method, and the ordinary atomization method generally uses room temperature water at 20-40°C as the power source for preparation, and the copper-tin alloy powder prepared in this way has the following disadvantages: 1 ) The bulk density is higher, usually 3.5 ~ 4.5g / cm 3 ; 2. The compactness and compression properties of the applied products are poor

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  • Preparation method for reducing apparent density of copper-tin alloy powder
  • Preparation method for reducing apparent density of copper-tin alloy powder
  • Preparation method for reducing apparent density of copper-tin alloy powder

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Embodiment 1

[0023] A kind of preparation method that the present invention discloses reduces the bulk density of copper-tin alloy powder, comprises the following steps:

[0024] (1) choose high-purity copper plate and pure tin powder as raw material, copper content is 84%~86% by mass in the raw material; Tin content is 14%~16% by mass; Copper content is 99.9% in the described high-purity copper plate %~99.95%;

[0025] (2) Water at 0-5°C is used as the source of atomized water during atomization; 1.2kg of charcoal is added during the smelting process, and the steel pouring temperature is 1200°C, and the powder is dehydrated and dried after atomization; the temperature of dehydration and drying treatment is 20 ℃;

[0026] (3) Use the push boat type reduction furnace to feed hydrogen into the reduction; the reduction temperature is 430°C, the boat load is 10kg, the reduction time is 2.3h, the push speed is 620s / boat; the hydrogen flow rate is 4.8m 3 / h;

[0027] (4) Sieve the alloy powde...

Embodiment 2

[0030] A kind of preparation method that the present invention discloses reduces the bulk density of copper-tin alloy powder, comprises the following steps:

[0031] (1) choose high-purity copper plate and pure tin powder as raw material, copper content is 84%~86% by mass in the raw material; Tin content is 14%~16% by mass; Copper content is 99.9% in the described high-purity copper plate %~99.95%;

[0032] (2) Water at 0-5°C is used as the source of atomized water during atomization; 1.0kg of charcoal is added during the smelting process, the temperature of pouring steel is 1250°C, and the powder is dehydrated and dried after atomization; the temperature of dehydration and drying treatment is 16 ℃

[0033] (3) Use a push boat type reduction furnace to feed hydrogen into the reduction; the reduction temperature is 450°C, the boat load is 9kg, the reduction time is 2.0h, the push speed is 600s / boat; the hydrogen flow rate is 4.5m 3 / h;

[0034] (4) sieve the alloy powder obt...

Embodiment 3

[0037] A kind of preparation method that the present invention discloses reduces the bulk density of copper-tin alloy powder, comprises the following steps:

[0038] (1) choose high-purity copper plate and pure tin powder as raw material, copper content is 84%~86% by mass in the raw material; Tin content is 14%~16% by mass; Copper content is 99.9% in the described high-purity copper plate %~99.95%;

[0039] (2) Water at 0-5°C is used as the source of atomized water during atomization; 1.5kg of charcoal is added during the smelting process, the steel pouring temperature is 1300°C, and the powder is dehydrated and dried after atomization; the temperature of dehydration and drying treatment is 20 ℃;

[0040] (3) Use a push boat type reduction furnace to feed hydrogen into the reduction; the reduction temperature is 450°C, the boat load is 11kg, the reduction time is 2.5h, the push speed is 650s / boat; the hydrogen flow rate is 5.0m 3 / h;

[0041] (4) sieve the alloy powder obta...

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Abstract

The invention discloses a preparation method for reducing apparent density of copper-tin alloy powder. The preparation method comprises the following steps that a high-purity copper plate and pure tin powder are selected as raw materials, and water at 0 DEG C-5 DEG C are taken as an atomized water source during atomization; charcoal is added in the smelting process, the steel casting temperature is 1200 DEG C-1300 DEG C, and powder is dehydrated and dried after atomization; hydrogen is introduced by using a boat pushing type reduction furnace for reduction; alloy powder obtained after reduction is screened; and mixing and blending are conducted to obtain the finished copper-tin alloy powder. The apparent density of the prepared alloy powder ranges from 3.0 g / cm < 3 > to 3.5 g / cm < 3 >, and compared with the apparent density of finished alloy powder prepared through a traditional atomization method ranges from 3.5 g / cm < 3 > to 4.0 g / cm < 3 >, the apparent density of the alloy powder is greatly reduced, and the shape maintaining performance of the pressed powder is facilitated; and a high-quality raw material is provided for a high-end diamond tool, and the sharpness and the wear resistance of the diamond tool are effectively improved. In addition, due to the fact that the atomized water temperature is low, the powder cooling speed is increased after the molten steel is crushed, the oxidation time in the powder flying process is shortened, and therefore powder with the low oxygen content is obtained.

Description

technical field [0001] The invention relates to the field of preparation methods of copper-tin alloy powder, in particular to a preparation method for reducing the bulk density of copper-tin alloy powder. Background technique [0002] Copper-tin alloy powder is a kind of alloy powder whose product shape is irregular spherical shape. After sintering, it has the advantages of stable shrinkage, good compressibility and formability, so it is widely used in powder metallurgy, diamond tools, filter materials, Bimetallic and conductive functional materials and other fields. [0003] At present, the traditional preparation method of copper-tin alloy powder is generally the atomization method, and the ordinary atomization method generally uses room temperature water at 20-40°C as the power source for preparation, and the copper-tin alloy powder prepared in this way has the following disadvantages: 1 ) The bulk density is higher, usually 3.5 ~ 4.5g / cm 3 ; 2. The compactness and comp...

Claims

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Application Information

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IPC IPC(8): B22F9/08B22F1/00C22C9/02
CPCB22F9/082C22C9/02B22F2009/0828
Inventor 赵军喜张静彬
Owner 江苏萌达新材料科技有限公司
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