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Al-Cu-Mg-Ag powdered metallurgical heat-resisting aluminum alloy and preparation method thereof

A powder metallurgy, aluminum-copper-magnesium technology, which is applied in the field of aluminum-copper-magnesium-silver powder metallurgy heat-resistant aluminum alloy and its preparation, achieves the effects of less pores, high density and improved overall strength

Inactive Publication Date: 2010-09-01
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the technical deficiencies and defects of the existing aluminum-copper-magnesium-silver cast heat-resistant aluminum alloys, and propose a reasonable component ratio, simple production process, which can effectively improve the overall strength and high-temperature heat resistance of aluminum alloys Aluminum-copper-magnesium-silver powder metallurgy heat-resistant aluminum alloy with high performance and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The chemical composition of the experimental alloy is: Al-7Cu-0.8Mg-0.4Ag (mass fraction), and the alloy ingredients are 200 mesh copper powder, 100 mesh aluminum powder, 100 mesh magnesium powder, and 300 mesh silver powder. The elemental powder was protected by argon, ball milled on a ball mill at a speed of 100 rpm for 60 h, passed through a -50 mesh sieve, and then molded at room temperature with a pressure of 200 MPa. The compact was hot-pressed and sintered in a vacuum hot-pressed sintering furnace with a vacuum degree of 0.1 MPa, a sintering temperature of 580 °C, a sintering time of 10 h, and a sintering pressure of 15 MPa. The sintered sample was solid-dissolved at 520°C for 24h, quenched into water at room temperature, and then artificially aged at 210°C for 4h. The maximum compressive strength at room temperature of the alloy is ≥466MPa, and the maximum compressive strength at 300°C is ≥232MPa.

Embodiment 2

[0032] The chemical composition of the experimental alloy is: Al-4Cu-1.4Mg-1.2Ag-0.5Mn-0.25Zr-0.25Ti (mass fraction), the alloy ingredients are 100 mesh copper powder, 250 mesh aluminum powder, 100 mesh magnesium powder, 200 mesh silver powder , 100 mesh manganese powder, 100 mesh titanium powder, 100 mesh zirconium powder. The element powder was protected by argon, ball milled on a ball mill at a speed of 250 rpm for 35 hours, passed through a -50 mesh sieve, and then molded at room temperature with a pressure of 300 MPa. The compact was hot-pressed and sintered in a vacuum hot-pressed sintering furnace with a vacuum degree of 0.01MPa, a sintering temperature of 600°C, a sintering time of 7 hours, and a sintering pressure of 20MPa. The sintered samples were solid-dissolved at 530°C for 13h, quenched into water at room temperature, and then artificially aged at 180°C for 22h. The maximum compressive strength of the alloy at room temperature is ≥453MPa, and the maximum compres...

Embodiment 3

[0034] The chemical composition of the experimental alloy is: Al-4Cu-1.4Mg-1.2Ag-0.5Mn-0.5Zr-0.5Ti (mass fraction), the alloy ingredients are 100 mesh copper powder, 300 mesh aluminum powder, 200 mesh magnesium powder, 100 mesh silver powder , 100 mesh manganese powder, 100 mesh titanium powder, 100 mesh zirconium powder. The element powder was protected by argon, ball milled on a ball mill at a speed of 250 rpm for 35 hours, passed through a -50 mesh sieve, and then molded at room temperature with a pressure of 300 MPa. The compact was hot-pressed and sintered in a vacuum hot-pressed sintering furnace with a vacuum degree of 0.01MPa, a sintering temperature of 600°C, a sintering time of 7 hours, and a sintering pressure of 20MPa. The sintered sample was solid-dissolved at 530°C for 13h, quenched into oil at room temperature, and then artificially aged at 180°C for 22h. The maximum compressive strength of the alloy at room temperature is ≥462MPa, and the maximum compressive s...

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Abstract

The invention discloses an Al-Cu-Mg-Ag powdered metallurgical heat-resisting aluminum alloy and a preparation method thereof. The alloy comprises the components in percentage by weight: 4 to10 percent of Cu, 0.8 to 2.0 percent of Mg, 0.4 to 2.0 percent of Ag, 0 to 1.0 percent of Mn, 0 to 1.0 percent of Zr, 0 to 1.0 percent of Ti and the balance of Al. By adopting an element powder method, and ball milling, blank pressing, vacuum hot pressed sintering, and solid solution and aging methods, the powdered metallurgical heat-resisting aluminum alloy with fine grains is obtained; and the performance of the alloy is obviously better than that of the conventional cast Al-Cu-Mg-Ag heat-resisting aluminum alloy, and requirement of middle and high temperature structural materials on the heat-resisting aluminum alloy can be met; and industrial application can be realized, and application of the aluminum alloy in the field of the middle and high temperature structural materials is expanded.

Description

technical field [0001] The invention relates to an aluminum-copper-magnesium-silver powder metallurgy heat-resistant aluminum alloy and a preparation method thereof. The invention belongs to the technical field of high-performance medium-temperature structural metal materials and powder metallurgy. . Background technique [0002] Aluminum-copper cast aluminum alloy is a heat-treatable and strengthened aluminum alloy, which is used as a medium-temperature structural material due to its good age hardening ability and thermal stability. Typical materials of this type include ZL201 in my country and 242.0 in the United States. The main chemical composition and weight percentage of ZL201 cast aluminum alloy are: Cu4.5-5.3%, Mn 0.6-1.0%, Ti 0.15-0.35%, the rest is Al, and its room temperature tensile strength σ b 363MPa, σ at 300°C b It is 118MPa; the main chemical composition and weight percentage of 242.0 cast aluminum alloy are: Cu 3.5-4.5%, Mg 1.2-1.8%, Ni 1.7-2.3%, the re...

Claims

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Application Information

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IPC IPC(8): C22C21/12C22C1/04C22F1/057
Inventor 肖代红宋旼
Owner CENT SOUTH UNIV
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