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High-plasticity and high-strength cast beryllium-aluminum alloy and preparation method thereof

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

Active Publication Date: 2021-10-15
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • High-plasticity and high-strength cast beryllium-aluminum alloy and preparation method thereof
  • High-plasticity and high-strength cast 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 and high-strength cast beryllium-aluminum alloy and a preparation method thereof. The high-plasticity and high-strength cast beryllium-aluminum alloy comprises the following components of: in percentage by weight, 56%-65% of beryllium (Be), 33%-42% of aluminum (Al), 0.7%-1.0% of nickel (Ni), 0.3%-0.6% of lithium (Li), 0.5%-1.0% of germanium (Ge) and the balance inevitable impurities. The cast beryllium aluminum alloy which is high in beryllium grain spheroidization degree and has high strength and plasticity is obtained by adding non-rare earth element metal to modify the microstructure of the alloy and combining the procedures of high-temperature smelting, two-stage heat preservation, homogenization and hot rolling. The alloy prepared through the method is relatively low in cost, uniform and compact in structure, few in casting defects, short in production process flow, relatively low in technical difficulty, close to or higher than powder metallurgy beryllium-aluminum alloy in strength and plasticity, and good in 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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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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