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A kind of preparation method of superfine copper infiltration powder

A copper infiltration, ultra-micro technology, applied in the field of metallurgy, to achieve the effect of maintaining precision, good wettability, increasing density and strength

Active Publication Date: 2021-07-27
JIANGSU DAFANG METAL POWDER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, no effective solution has been proposed for the corrosion and residual problems of copper infiltrating powder in the process of infiltration of austenitic stainless steel

Method used

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  • A kind of preparation method of superfine copper infiltration powder
  • A kind of preparation method of superfine copper infiltration powder
  • A kind of preparation method of superfine copper infiltration powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 100 parts of copper and 2 parts of iron, evaporated by heating in high frequency or intermediate current induction, during evaporation, nitrogen, and nitrogen carrying the powder in the action of the powder in the powder collector, Finally, the solid powder particles I are finally collected on the collector.

[0019] Two parts of 2 parts of iron were mixed with 0.2 parts, 0.1 parts of boron, resulting in alloy ingots, placed in a closed container, at room temperature, vacuum to 1.5 * 10 -3 Pa, then enter high purity hydrogen, raise the pressure to 0.5 MPa, so that the alloy ingot is hydrogenab and the hydrogen is stopped, and the hydrogen is stopped, and the vacuum dehydrogenation is evacuated to obtain solid powder particles II;

[0020] The obtained solid powder particles I were mixed with II, and under normal protection of the solid powder particles I, nitrogen was further grounded to a powder of less than 1.0 μm.

Embodiment 2

[0022] 100 parts of copper and 3 parts of iron, evaporated by heating by itself under high frequency or intermediate current induction, during evaporation, nitrogen, and nitrogen carrying the powder in the action of the powder in the powder collector, Finally, the solid powder particles I are finally collected on the collector.

[0023] 3 parts were mixed with 0.5 parts, 0.15 parts of boron mixture, resulting in an alloy ingot, placed in a closed container, at room temperature, vacuum to 1.8 * 10 -3 Pa, then enter high purity hydrogen, raise the pressure to 0.5 MPa, so that the alloy ingot is hydrogenab and the hydrogen is stopped, and the hydrogen is stopped, and the vacuum dehydrogenation is evacuated to obtain solid powder particles II;

[0024] The obtained solid powder particles I were mixed with II, and under normal protection of the solid powder particles I, nitrogen was further grounded to a powder of less than 1.0 μm.

Embodiment 3

[0026] 100 parts of copper and 2 parts of iron, evaporated by heating in high frequency or intermediate current induction, during evaporation, nitrogen, and nitrogen carrying the powder in the action of the powder in the powder collector, Finally, the solid powder particles I are finally collected on the collector.

[0027] Two parts of 2 parts of iron were mixed with 0.2 parts, 0.1 parts of boron, resulting in alloy ingots, placed in a closed container, at room temperature, vacuum to 1.5 * 10 -3 Pa, reap into high-purity hydrogen, raised to 0.4 to 0.5 MPa, so that the alloy ingot is hydrogenab and the hydrogen is stopped, and the hydrogen is vacuum dehydrogenation to obtain solid powder particles II;

[0028] The obtained solid powder particles I were mixed with II described above, and under nitrogen protection was further grounded with gas to flow, and then placed in a tubular reactor, at normal pressure, inlet oxygen, carbon dioxide mixture The flow rate ratio of oxygen and car...

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Abstract

This application discloses a method for preparing ultra-fine copper infiltration powder, which includes the following steps: after the ratio of copper and iron is good, iron and copper are mixed, and evaporated by self-heating under the induction of high-frequency or medium-frequency current. , feed nitrogen to make copper and iron vapor form regional saturation, nucleate and grow, form particles, and obtain solid powder particles I; iron, neodymium and boron are mixed and smelted to obtain alloy ingots, which are placed in airtight containers. Vacuumize the container at room temperature, then introduce high-purity hydrogen, and increase the pressure, so that the alloy ingot absorbs hydrogen and bursts. After the hydrogen absorption stops, vacuum dehydrogenate to obtain solid powder particles II; the solid powder particles obtained by the above two steps Mix I and II, and further grind into a powder smaller than 1.0 μm with a jet mill under the protection of nitrogen. The copper infiltrating powder prepared by the method of the invention can improve the density and strength of parts, and at the same time, has no corrosion pits and no residual copper slag.

Description

Technical field [0001] The present application relates to the field of metallurgical technology, and in particular, there is a method of preparing ultra-micro-permeable copper powder. Background technique [0002] The copper powder is a metallurgical powder based on copper as the main raw material, which is mainly used for melt-lever treatment of ferromic materials. The so-called melting is the process of impiltrate the pores of the iron or iron-based part after melting a metal having a low melting point of the iron metal powder part. This process can improve the tensile strength, stretching, robustness and collision of iron-based parts. The iron-based parts can improve the mechanical properties such as strength, hardness, and toughness after fell, improve the cutting, increase density, enhance conductivity and thermal conductivity. [0003] The existing research on copper-cement powder is mainly focused on improving the study of melting rate, and the study of the fusion process....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F9/02B22F9/04B22F9/12C23C10/28
CPCB22F1/0003B22F9/12B22F9/023B22F9/04C23C10/28B22F2009/045B22F1/14
Inventor 方义强邓中旺
Owner JIANGSU DAFANG METAL POWDER
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