Beryllium-aluminum alloy sheet and manufacturing method thereof

A beryllium aluminum alloy and plate technology, which is applied in the field of beryllium aluminum alloy plate and its preparation, can solve the problems that beryllium and aluminum are difficult to mix uniformly, difficult to scale production, and the prospect of industrialization is not optimistic, and the as-cast structure of the alloy can be refined. , the effect of improving the plastic deformation ability of the alloy

Active Publication Date: 2015-09-30
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

Although this method is the most economical, it is difficult to mix beryllium and aluminum evenly in actual operation, and it

Method used

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  • Beryllium-aluminum alloy sheet and manufacturing method thereof
  • Beryllium-aluminum alloy sheet and manufacturing method thereof
  • Beryllium-aluminum alloy sheet and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0059] The preparation method is as follows:

[0060] (1) Ingredients, weigh 1.24kg of metal beryllium block and 0.76kg of metal aluminum ingot; put the prepared raw materials into an alumina crucible and place them in a resistance furnace for melting, control the melting temperature to 1300°C and melt for 15 minutes to obtain alloy melt.

[0061] (2) Cool down the alloy melt to 1145°C and keep it warm for 10min.

[0062] (3) Quickly and smoothly pour the heat-preserved alloy melt into a graphite mold with an alumina coating that has been preheated to 600°C, and at the same time turn on the alternating rotating magnetic field, control the input current to 100A and the stirring frequency to 10Hz , to obtain a beryllium aluminum alloy ingot.

[0063] (4) The surface scale of the beryllium-aluminum alloy ingot is removed by turning to obtain a beryllium-aluminum alloy billet.

[0064] (5) Heating the beryllium aluminum alloy billet to 600°C in a box-type resistance furnace.

...

example 2

[0071] The preparation method is as follows:

[0072] (1) Ingredients, weighing 1.24kg of metal beryllium block and 0.76kg of metal aluminum ingot; putting the prepared raw materials into an alumina crucible and melting in a resistance furnace, controlling the melting temperature to be 1280°C and melting for 10 minutes to obtain alloy melt.

[0073] (2) Cool down the alloy melt to 1148°C and keep it warm for 15min.

[0074] (3) Quickly and smoothly pour the heat-preserved alloy melt into a graphite mold with an alumina coating that has been preheated to 500°C, and at the same time turn on the alternating rotating electromagnetic field, control the input current to 80A and the stirring frequency to 15Hz , to obtain a beryllium aluminum alloy ingot.

[0075] (4) The surface scale of the beryllium-aluminum alloy ingot is removed by turning to obtain a beryllium-aluminum alloy billet.

[0076] (5) Heating the beryllium-aluminum alloy billet to 380° C. in a box-type resistance f...

example 3

[0086] The preparation method is as follows:

[0087](1) Ingredients, weigh 1.55 kg of metal beryllium block and 0.95 kg of metal aluminum ingot; put the prepared raw materials into a beryllium oxide crucible and place them in a resistance furnace for melting, control the melting temperature to be 1300° C. and melt for 18 minutes to obtain alloy melt.

[0088] (2) Cool down the alloy melt to 1150°C and keep it warm for 18min.

[0089] (3) Quickly and smoothly pour the heat-preserved alloy melt into a graphite mold with an alumina coating that has been preheated to 550°C, and at the same time turn on the traveling wave magnetic field, control the input current to 100A and the stirring frequency to 30Hz, Obtain beryllium aluminum alloy ingot.

[0090] (4) The surface scale of the beryllium-aluminum alloy ingot is removed by turning to obtain a beryllium-aluminum alloy billet.

[0091] (5) Heating the beryllium aluminum alloy billet to 500°C in a box-type resistance furnace. ...

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Abstract

The invention discloses a beryllium-aluminum alloy sheet and a manufacturing method thereof. The manufacturing method comprises the sequential steps of manufacturing beryllium-aluminum alloy cast ingots, performing hot-pressing preforming on the beryllium-aluminum alloy cast ingots and performing hot-rolling forming on beryllium-aluminum alloy ingot blanks so that the beryllium-aluminum alloy sheet can be obtained. In the step of manufacturing the beryllium-aluminum alloy cast ingots, near-liquidus electromagnetic casting is adopted for manufacturing the beryllium-aluminum alloy cast ingots. The manufacturing method is a composite processing method combining near-liquidus electromagnetic casting, solid-state hot-pressing preforming and precision rolling. Near-liquidus electromagnetic casting is adopted in the step of manufacturing the beryllium-aluminum alloy cast ingots, formation of small and uniform non-dendritic structures is facilitated, and refining of alloy as-cast structures of beryllium-aluminum alloy is facilitated. Alloy dendritic structures of the cast ingots are further fragmented through hot-pressing performing, and the plastic deformation capacity of the alloy is improved. Finally, the sheet of the required thickness is obtained through a precision rolling method, and both the mechanical property and the composition of the produced beryllium-aluminum alloy sheet meet the requirements.

Description

technical field [0001] The invention relates to the technical field of alloys and their processing, more specifically, the invention relates to a beryllium-aluminum alloy plate and a preparation method thereof. Background technique [0002] Beryllium aluminum alloy combines the high modulus of elasticity of metal beryllium with the high toughness and ease of processing of metal aluminum. It is a unique light (density 25% lower than aluminum), rigid (specific stiffness is aluminum, titanium, steel, 4 times that of magnesium), high damping and high stability (the thermal expansion coefficient is 50% lower than that of aluminum), it is considered to be "an important material from laboratory to engineering application in the 21st century", in the field of defense and aerospace with broadly application foreground. [0003] There are three main production processes of beryllium aluminum alloy: powder metallurgy, casting and forging (extrusion) forming. The microstructures of all...

Claims

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Application Information

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IPC IPC(8): B22D27/02B22D21/00B21C37/02
Inventor 王晶王震宏周运洪陆喜龙波鲍永新
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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