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A kind of high plasticity, high strength casting beryllium aluminum alloy and preparation method thereof

A beryllium aluminum alloy and alloy technology, which is applied in the field of non-ferrous metal alloy preparation, can solve the problems of poor plasticity, low strength, and difficult casting defects of beryllium aluminum alloy, and achieve the effects of improving plasticity, low cost, and increasing alloy hardness

Active Publication Date: 2022-04-29
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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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: the present invention provides a high plasticity, high strength casting beryllium aluminum alloy and its preparation method, which solves the problems of poor plasticity, low strength and difficult control of casting defects in the beryllium aluminum alloy prepared by conventional casting methods. existing problems

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  • A kind of high plasticity, high strength casting beryllium aluminum alloy and preparation method thereof
  • A kind of high plasticity, high strength casting beryllium aluminum alloy and preparation method thereof

Examples

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Embodiment 1

[0033] A high-plasticity, high-strength cast beryllium aluminum alloy, comprising: beryllium (Be) 60%, aluminum (Al) 38%, nickel (Ni) 1.0%, lithium (Li) 0.5%, germanium (Ge) 0.5% according to mass percentage %, and the rest are unavoidable impurities.

[0034] A method for preparing the above-mentioned beryllium aluminum alloy, comprising the following steps: vacuuming the cavity of the vacuum induction melting furnace to 2.0×10 -2 After the Pa is filled with high-purity argon gas of 0.1 standard atmospheric pressure, the prepared alloy raw materials are placed in a graphite crucible and preheated at 200°C for 10 minutes. Turn on the power to raise the temperature of the raw material to 1430°C and keep it warm for 15 minutes, then cool it down to 1380°C and keep it warm for 4 minutes, and then pour it into an ingot at 1360°C. After coming out of the furnace, the alloy ingot was homogenized and heat-treated in argon at 560°C for 24 hours, and then water-quenched at room temper...

Embodiment 2

[0040] A high-plasticity, high-strength cast beryllium aluminum alloy, comprising: beryllium (Be) 65%, aluminum (Al) 33%, nickel (Ni) 0.7%, lithium (Li) 0.3%, germanium (Ge) 1.0% by mass percentage %, and the rest are unavoidable impurities.

[0041] A method for preparing the above-mentioned beryllium-aluminum alloy, comprising the steps of: evacuating the cavity of a vacuum induction melting furnace to 1.5×10- 2After the Pa is filled with high-purity argon gas of 0.2 standard atmospheric pressure, the prepared alloy raw materials are placed in a graphite crucible and preheated at 150°C for 30 minutes. Turn on the power to raise the temperature of the raw material to 1450°C and keep it warm for 12 minutes, then cool it down to 1360°C and keep it warm for 6 minutes, and then pour it into an ingot at 1350°C. After being released from the furnace, the alloy ingot was homogenized and heat-treated in argon at 540°C for 36 hours, and then water-quenched at room temperature. Carry...

Embodiment 3

[0046] A high-plasticity, high-strength cast beryllium-aluminum alloy, composed according to mass percentage: beryllium (Be) 56%, aluminum (Al) 42%, nickel (Ni) 0.8%, lithium (Li) 0.6%, germanium (Ge) 0.6% %, and the rest are unavoidable impurities.

[0047] A method for preparing the above-mentioned beryllium-aluminum alloy, comprising the following steps: the method for preparing the above-mentioned high-strength, high-plasticity cast beryllium-aluminum alloy is as follows: evacuate the cavity of the vacuum induction melting furnace to 2.0×10- 2 After Pa, it is filled with high-purity argon gas of 0.4 standard atmospheric pressure, and the prepared alloy raw materials are placed in a graphite crucible and preheated at 180°C for 20 minutes. Turn on the power to raise the temperature of the raw material to 1400°C and keep it warm for 20 minutes, then cool it down to 1350°C and keep it warm for 8 minutes, and then pour it into an ingot at 1340°C. After coming out of the furnac...

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Abstract

The invention discloses a high-plasticity, high-strength casting beryllium aluminum alloy and a preparation method thereof. 0.7-1.0%, lithium (Li) 0.3-0.6%, germanium (Ge) 0.5-1.0%, and the rest are unavoidable impurities. By adding non-rare earth element metals to modify the microstructure of the alloy, combined with high-temperature melting, two-stage heat preservation, homogenization and hot rolling processes, the cast beryllium with a high degree of spheroidization of beryllium grains and high strength and plasticity was obtained. aluminum alloy. The alloy of the invention has relatively low cost, uniform and compact alloy structure, less casting defects, short production process, relatively low technical difficulty, alloy strength and plasticity close to or higher than powder metallurgy beryllium aluminum alloy, and has good application value.

Description

technical field [0001] The invention relates to the field of nonferrous metal alloy preparation, in particular to the field of beryllium-aluminum alloy manufacturing, and specifically relates to a high-plasticity, high-strength cast beryllium-aluminum alloy and a preparation method thereof. Background technique [0002] Beryllium aluminum alloy combines the low density and high strength of metal beryllium with the high plasticity and excellent mechanical properties of metal aluminum. It has high specific stiffness, high thermal conductivity and excellent dimensional stability, while retaining high toughness. It also has the characteristics of easy processing. It is a unique new type of lightweight high-strength alloy. It has broad application prospects in aerospace, nuclear industry and other fields. [0003] However, the mutual solid solubility between metal beryllium and aluminum is low, and the difference in melting point is large. When the alloy is solidified by conventi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C25/00C22C1/02C22F1/02C22F1/16C21D9/00B21B37/74B21B37/58B21B1/26
CPCC22C25/00C22C1/02C22F1/02C22F1/002C22F1/16C21D9/0081B21B1/26B21B37/74B21B37/58
Inventor 阳家文余良波李鱼飞陈冬王晶
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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