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Preparation method of particle size controllable type copper-tin prealloy powder with ultrahigh tin content

A pre-alloyed powder and content technology, which is applied in the field of preparation of copper-tin pre-alloyed powder, can solve the problems of copper-tin alloy tin content, uneven distribution, uncontrollable particle size of alloy powder, etc. Grain growth is conducive to the effect of rapid nucleation

Active Publication Date: 2020-07-17
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of copper-tin pre-alloy powder with controllable particle size of ultra-high tin content, which solves the uncontrollable particle size of alloy powder in the existing technology and the tin The problem of low content and uneven distribution

Method used

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  • Preparation method of particle size controllable type copper-tin prealloy powder with ultrahigh tin content
  • Preparation method of particle size controllable type copper-tin prealloy powder with ultrahigh tin content
  • Preparation method of particle size controllable type copper-tin prealloy powder with ultrahigh tin content

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preliminary preparation of raw materials: Weigh 83.0% of Cu powder, 16.6% of Sn powder, and 0.4% of Ti powder, put them into a ball mill jar, and use a planetary ball mill to mix the powder at a speed of 100r / min for 4 hours. The reversal time is 10 minutes, the ball-to-material ratio is 1:2, and then the mixed powder is put into a pressing mold, and a cold pressing machine is used to make a cold compact.

[0034] Cover the inner wall and bottom of the graphite crucible with graphite paper, and cut a small hole at the bottom with the same diameter as the upper end of the nozzle to ensure that the nozzle can be placed in the bottom of the graphite crucible. The diameter of the nozzle is 3.5 μm. Then put the cold compact into the crucible, reserve a space for the corundum tube to be lifted and lowered, and ensure that the corundum tube can fit closely with the upper end of the nozzle after being inserted into the crucible. Then place the crucible inside the furnace door, ...

Embodiment 2

[0039]Preliminary preparation of raw materials: Weigh 80.0% of Cu powder, 19.6% of Sn powder, and 0.4% of Ti powder, and then put them into a ball mill tank, and use a planetary ball mill to mix the powder, the powder mixing speed is 200r / min, and the powder mixing time is 4h , forward and reverse time 10min, ball to material ratio 1:2. Then put the mixed powder into the pressing mold, and use a cold press to make a cold compact.

[0040] Cover the inner wall and bottom of the graphite crucible with graphite paper, and cut a small hole at the bottom with the same diameter as the upper end of the nozzle to ensure that the nozzle can be placed in the bottom of the graphite crucible, and the diameter of the nozzle is 5.0 μm. Then put the cold compact into the crucible, reserve a space for the corundum tube to be lifted and lowered, and ensure that the corundum tube can fit closely with the upper end of the nozzle after being inserted into the crucible. Then place the crucible in...

Embodiment 3

[0044] Preliminary preparation of raw materials: Weigh 79.6% of Cu powder, 20.0% of Sn powder, and 0.4% of Ti powder, and then put them into a ball mill tank, and use a planetary ball mill to mix the powder, the powder mixing speed is 100r / min, and the powder mixing time is 4h , forward and reverse time 10min, ball to material ratio 1:2. Then put the mixed powder into the pressing mold, and use a cold press to make a cold compact.

[0045] Cover the inner wall and bottom of the graphite crucible with graphite paper, and cut a small hole at the bottom with the same diameter as the upper end of the nozzle to ensure that the nozzle can be placed in the bottom of the graphite crucible. The diameter of the nozzle is 4.5 μm. Then put the cold compact into the crucible, reserve a space for the corundum tube to be lifted and lowered, and ensure that the corundum tube can fit closely with the upper end of the nozzle after being inserted into the crucible. Then place the crucible insid...

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Abstract

The invention discloses a preparation method of particle size controllable type copper-tin prealloy powder with an ultrahigh tin content. The preparation method comprises the following specific stepsthat 1, according to the mass percentage, 77.5%-83.0% of cupper powder, 16.6%-22.1% of Sn powder and 0.4% of Ti powder are fetched in a weighed manner, and all the ingredients are mixed and made intoa cold pressing blank; 2, a crucible is pretreated, the diameter of a nozzle is controlled to be 3.5-5.0 microns, and the cold pressing blank is placed in the crucible; 3, atomizing deposition is conducted, and alloy powder is obtained; and 4, the alloy powder is screened with multiple screen nets, and then the particle size controllable type copper-tin prealloy powder with the ultrahigh tin content is obtained. The particle size of the copper-tin prealloy powder is controllable, the powder is dense, and hollow powder is avoided; by utilizing the copper-tin prealloy powder to prepare copper-tin alloy for superconduction, the problem of insufficient tin content is solved, and the tin is evenly distributed in the alloy.

Description

technical field [0001] The invention belongs to the technical field of alloy powder preparation, and in particular relates to a method for preparing copper-tin pre-alloy powder with ultra-high tin content and controllable particle size. Background technique [0002] At present, the bronze method is the preparation of commercial Nb 3 The mainstream method of Sn superconducting wire, this method has high requirements on the tin content in the copper-tin alloy. Copper-tin alloys for superconductivity are mostly prepared by casting. The copper-tin alloys prepared by the casting method will form columnar crystals when they solidify. Diffusion is performed to complete the growth of columnar crystals. During the growth of columnar crystals, the concentration of solute tin in the liquid phase will become higher and higher. Due to the negative pressure generated when the ingot solidifies and shrinks outside the ingot, the tin-enriched liquid between the columnar crystals will flow ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/08B22F9/04C22C9/02
CPCB22F1/0003B22F9/082B22F9/04C22C9/02B22F2009/0824B22F2009/043B22F2009/0848
Inventor 邹军涛王宇轩石林石浩梁淑华
Owner XIAN UNIV OF TECH
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