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Monotectic alloy material and preparing method thereof

A technology of monotectic alloy and base material, applied in the field of monotectic alloy material and its preparation, can solve the problems of difficulty in obtaining monotectic alloy, alloy segregation and the like

Inactive Publication Date: 2020-05-05
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, monotectic alloys are immiscible alloys. When the temperature drops to a certain temperature, the liquid phase separation will occur in the homogeneous monotectic alloy melt. Under normal solidification conditions, this type of alloy is prone to severe segregation, and Difficult to Obtain Monotectic Alloys with Diffuse Distribution of Second Phase

Method used

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  • Monotectic alloy material and preparing method thereof
  • Monotectic alloy material and preparing method thereof
  • Monotectic alloy material and preparing method thereof

Examples

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preparation example Construction

[0024] The invention provides a method for preparing a monotectic alloy material, comprising the following steps:

[0025] Melting the monotectic alloy raw material in a crucible to obtain a smelting solution;

[0026] Spraying the smelting liquid onto the substrate through the micropores of the crucible under the action of an inert gas to obtain a monotectic alloy material;

[0027] The pressure of the inert gas is ≥7MPa; the temperature of the substrate is 20-30°C.

[0028] The invention melts the monotectic alloy raw material in a crucible to obtain a smelting liquid.

[0029] The present invention does not specifically limit the type of the monotectic alloy raw material, and those skilled in the art can select according to the monotectic alloy raw material to be prepared; the present invention does not specifically limit the melting temperature and time, according to the The selected monotectic alloy raw material can be set. In a specific embodiment of the present inven...

Embodiment 1

[0039] use figure 2 The equipment prepares monotectic alloy materials on the surface of iron discs:

[0040] Put the Al-Bi monotectic alloy raw material with a mass ratio of 9:1 on the Si 3 N 4 In the crucible, the temperature was raised to 1000°C through the electromagnetic induction melting device, and the temperature was kept for 10 minutes to obtain the melting liquid;

[0041] Inert gas with a pressure of 10 MPa is poured into the crucible, so that the melting liquid in the crucible is sprayed from the micropores (aperture 1.5 mm) on the bottom surface of the crucible to the rotating iron disc (temperature is 20 ° C), so that The linear speed of the iron disc is 5m / s, and it is sprayed for 5 minutes to obtain a monotectic alloy material.

[0042] image 3 For the metallographic microstructure photo of the monotectic alloy material obtained in this embodiment, from image 3 It can be seen that the monotectic alloy grains are dispersed and the solidified structure is ...

Embodiment 2

[0044] use figure 2 The equipment shown prepares monotectic alloy material on the surface of an iron disc:

[0045] Put the Al-Pb monotectic alloy raw material with a mass ratio of 9:1 on the Si 3 N 4 In the crucible, the temperature was raised to 1000°C through the electromagnetic induction melting device, and the temperature was kept for 10 minutes to obtain the melting liquid;

[0046] Pour into the crucible an inert gas with a pressure of 20 MPa, so that the molten liquid in the crucible is sprayed from the micropores (aperture 1.0 mm) on the bottom surface of the crucible to the rotating iron disk (temperature is 20 ° C), so that The linear speed of the iron disc is 10m / s, spray for 10min, and obtain the monotectic alloy material.

[0047] Figure 4 For the metallographic microstructure photo of the monotectic alloy material obtained in this embodiment, from Figure 4 It can be seen that the distribution of black Pb phase particles in the Al matrix is ​​dense and un...

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Abstract

The invention provides a monotectic alloy material and a preparing method thereof, and belongs to the technical field of monotectic alloy material preparing. According to the provided preparing method, the monotectic alloy material is fused, and smelted liquid is obtained; and the smelted liquid is sprayed to a base material under the action of inert gas, and the monotectic alloy material is obtained, wherein the pressure intensity of the inert gas is larger than or equal to 7 MPa, and the temperature of the base material is 20-30 DEG C. A rapid condensation technology is combined in the monotectic alloy preparing process, the high-pressure inert gas is utilized for spraying the fusion-state monotectic alloy material to the base material with the temperature being 20-30 DEG C, rapid solidification of the smelted liquid is achieved, the liquid-liquid phase change overcooling degree and the dispersed phase liquid drop nucleation rate are improved, macrosegregation of a solidification structure is restrained, forming of a dispersed solidification structure is promoted, and structure uniformity of the monotectic alloy material is guaranteed.

Description

technical field [0001] The invention relates to the technical field of monotectic alloy material preparation, in particular to a monotectic alloy material and a preparation method thereof. Background technique [0002] Monotectic alloys have unique physical and mechanical properties and can be used as self-lubricating materials. They are ideal new bearing alloy materials in the automotive industry. Monotectic alloys with dispersed second-phase particles have superconducting properties and can be used to make superconducting materials. materials, making AC superconducting generators, magnetic fluid generators and superconducting transmission lines, etc. In addition, the monotectic alloy in which the second phase is evenly distributed in the form of particles or fibers can be made into an electrical contact material with good thermal conductivity and electrical conductivity and a permanent magnet with high coercive force. However, monotectic alloys are immiscible alloys. When...

Claims

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Application Information

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IPC IPC(8): C23C4/123C23C4/137C23C4/08
CPCC23C4/08C23C4/123C23C4/137
Inventor 余建波张振强李霞王江任忠鸣
Owner SHANGHAI UNIV
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