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Solid-liquid mixed casting method of copper-aluminum alloy

A solid-liquid mixed casting, copper-aluminum alloy technology, applied in the field of alloy casting, can solve the problems of refining grains, reducing the spacing of eutectic crystals, not breaking dendrites, etc., to achieve the effect of improving plasticity and strength and expanding the scope of application

Inactive Publication Date: 2019-06-04
CHENGDU XINGYU PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing copper-aluminum alloy casting method cannot break dendrites, refine grains, and reduce the interlamellar spacing of the eutectic, and there are certain defects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] A copper-aluminum alloy. The raw materials include, by mass parts: 9 parts by mass of silicon, 6 parts by mass of copper, 0.5 parts by mass of magnesium, 1 part by mass of iron, 65 parts by mass of aluminum, 0.1 parts by mass of zinc, and 0.2 parts by mass of chromium.

[0012] A method for solid-liquid mixed casting of copper and aluminum alloys. The raw materials are smelted in a well-type resistance crucible furnace. The smelting temperature is 880°C-920°C, and hexachloroethane and slagging agent are used for degassing and slag removal. During the smelting process, add the same copper-aluminum alloy powder with a mass fraction of 20% to the superheated melt, and stir evenly, so that the melt is rapidly cooled to the semi-solid temperature range, and the semi-solid slurry is quickly transferred to the preheated metal mold and extruding on a hydraulic press, the extrusion temperature is 200°C, and the extrusion speed is 0.6m / min; the extruded alloy is subjected to quenc...

Embodiment 2

[0014] A copper-aluminum alloy. The raw materials include: 11 parts by mass of silicon, 8 parts by mass of copper, 1 part by mass of magnesium, 1.5 parts by mass of iron, 80 parts by mass of aluminum, 0.2 parts by mass of zinc, and 0.2 parts by mass of chromium.

[0015] A solid-liquid mixed casting method of copper and aluminum alloys. The raw materials are smelted in a pit-type resistance crucible furnace. Add the same copper-aluminum alloy powder with a mass fraction of 20% into the overheated melt, and stir evenly to cool the melt rapidly to a semi-solid temperature range, and quickly transfer the semi-solid slurry to a preheated metal mold, and Extruding on a hydraulic press, the extrusion temperature is 00°C, and the extrusion speed is 1.0m / min; the extruded alloy is subjected to quenching treatment, the quenching temperature is 510°C, and the quenching treatment time is 40min, The quenched alloy was subjected to aging treatment, the aging treatment time was 5 min, and t...

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PUM

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Abstract

A copper-aluminum alloy is prepared from, by mass, 11 parts of silicon, 8 parts of copper, 1 part of magnesium, 1.5 parts of iron, 80 parts of aluminum, 0.2 part of zinc and 0.2 part of chrome. A solid-liquid mixed casting method of the copper-aluminum alloy includes steps that the material is subjected to smelting in a well-type resistance crucible furnace under the smelting temperature of 920 DEG C and degassing and deslagging by using hexachloroethane and a fluxing agent, specifically, in the smelting process, the same kind of copper-aluminum alloy powder with a mass fraction of 20% is added into an overheated melt and stirred uniformly to enable the melt cool down rapidly to a temperature range of a semi-solid state, and then the semi-solid slurry is rapidly transferred into a preheated metal mold and extruded on a hydraulic machine; and the extruded alloy is subjected to quenching treatment and then the quenched alloy is subjected to aging treatment. By means of the method, the solid-liquid mixed casting process is adopted to break dendrites, refine grains, and reduce eutectic inter-chip spacing, therefore, the plasticity and strength of the alloy casting are increased, extrusion and other forms of thermal processing are achieved and the range of applications is expanded.

Description

technical field [0001] The invention relates to the technical field of alloy casting, in particular to a solid-liquid mixed casting method of copper and aluminum alloys. Background technique [0002] Cast Cu-Al alloys are commonly used aluminum alloys in industry and have been widely used in various fields. Cu is an important additive element of aluminum alloy. The solid solubility of copper in aluminum is relatively high (5.7% by mass fraction), and the eutectic composition of copper and aluminum is also very high (33.2% by mass fraction). In addition, copper has a large diffusion rate in aluminum and can be dissolved in aluminum liquid. Adding an appropriate amount of copper to aluminum alloy can greatly improve the overall properties of the alloy, such as hardness, strength, wear resistance, toughness, high temperature performance, etc. . [0003] The existing copper-aluminum alloy casting method cannot break dendrites, refine grains, and reduce the interlamellar spacin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/02C22F1/043
Inventor 李程徐运福
Owner CHENGDU XINGYU PRECISION CASTING
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