Thermo-mechanical treatment method for toughening high-performance wrought rare earth aluminum alloy

A deformation heat treatment, aluminum alloy technology, applied in the field of alloys, can solve the problems of low cost, high cost, poor toughness, etc., and achieve the effects of making up for the loss of alloy strength, increasing alloy elongation, and increasing recrystallization ratio.

Inactive Publication Date: 2020-04-03
SHANDONG NANSHAN ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention aims at the problems that existing high-performance deformed rare-earth aluminum alloys have poor toughness, and the processes for improving toughness such as extrusion, rolling and stamping are complex, long-period, and costly, so that it is difficult to realize mass production, etc. Provide a low-cost, short-cycle toughening method

Method used

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  • Thermo-mechanical treatment method for toughening high-performance wrought rare earth aluminum alloy
  • Thermo-mechanical treatment method for toughening high-performance wrought rare earth aluminum alloy
  • Thermo-mechanical treatment method for toughening high-performance wrought rare earth aluminum alloy

Examples

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Effect test

Embodiment 1

[0030] Select an ingot with the composition of Al-0.6Mg-0.7Si-0.2Er, cut it to make a cylindrical sample with a diameter of 100mm and a height of 500mm, and then perform homogenization treatment, that is, place the sample in a tubular heat treatment furnace In the furnace, the temperature was raised to 560°C with the furnace, kept for 10 hours, and then quenched in water at room temperature. Then put the homogenized cylindrical sample into a tubular heat treatment furnace, preheat it at 490°C for 4 hours, then place it in room temperature water for quenching, and cut the preheated cylindrical sample into a diameter of 97 mm and a height of After forming a cylindrical sample of 495mm, place it in the ingot barrel of a press and heat it for 8 minutes to an extrusion temperature of 510°C, perform hot extrusion deformation treatment at an extrusion speed of 1mm / s and an extrusion ratio of 10:1, and obtain a rod with a diameter of 31mm . The bar is processed into a tensile test ba...

Embodiment 2

[0032] Select an ingot with the composition of Al-0.6Mg-0.7Si-0.3Er, cut it to make a cylindrical sample with a diameter of 100mm and a height of 500mm, and then perform homogenization treatment, that is, place the sample in a tubular heat treatment furnace In the furnace, the temperature was raised to 580°C with the furnace, kept for 8 hours, and then quenched in water at room temperature. Then put the homogenized cylindrical sample into a tubular heat treatment furnace, preheat it at 510°C for 2 hours, then place it in room temperature water for quenching, and cut the preheated cylindrical sample into a diameter of 97 mm and a height of After forming a cylindrical sample of 495mm, place it in the ingot barrel of a press and heat it for 8 minutes to an extrusion temperature of 510°C, then perform hot extrusion deformation treatment at an extrusion speed of 1mm / s and an extrusion ratio of 10:1 to obtain a rod with a diameter of 31mm material. The bar is processed into a tensi...

Embodiment 3

[0034] The steps are the same as in Example 1, except that the alloy is changed to Al-0.6Mg-0.7Si-0.4Er alloy. Its yield strength is 376MPa, tensile strength is 440MPa, and elongation is 10.8%.

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Abstract

The invention provides a thermo-mechanical treatment method for toughening a high-performance wrought rare earth aluminum alloy, and mainly relates to the technical field of alloys. The thermo-mechanical treatment method for toughening the high-performance wrought rare earth aluminum alloy is characterized in that the aluminum alloy comprises 0.6wt%-0.7wt% of magnesium, 0.6wt%-0.7wt% of silicon, 0wt%-0.8wt% of erbium and the balance of aluminum and inevitable impurities. The heat treatment method comprises the steps of (1) homogenizing heat treatment; (2) preheating treatment; and (3) hot extrusion deformation treatment. The beneficial effects of the invention are that related elements are selected, the wrought rare earth aluminum alloy mainly containing high-solid-solubility elements (Er,Mg, Si and the like) is subjected to preheating treatment and hot extrusion treatment, the elongation of the alloy is remarkably improved on the premise that the yield strength and the tensile strength of the alloy are not reduced, and the current situation that the existing conventional rare earth aluminum alloy is high in strength and low in toughness is improved.

Description

technical field [0001] The invention mainly relates to the field of alloy technology, in particular to a deformation heat treatment method for high-performance deformed rare-earth aluminum alloy toughening. Background technique [0002] Metal aluminum and aluminum alloys have excellent castability, specific stiffness, specific strength, good machinability and high damping coefficient, and have excellent electromagnetic shielding performance, and have great application potential in the fields of automobiles, aviation, electronics, etc. It has become one of the new green materials in the 21st century that manufacturers in the automobile, aircraft and other industries around the world are competing to research and develop. However, the strength of traditional aluminum alloys is not high, which severely limits the application of aluminum alloys. Therefore, the development of high-strength aluminum alloys is of great significance. At present, the use of rare earths to improve th...

Claims

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Application Information

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IPC IPC(8): C22F1/043B21C23/08
CPCB21C23/08C22F1/002C22F1/043
Inventor 隋来智程仁寨隋信磊马旭肖栋郑卓阳王丹任伟才付凯
Owner SHANDONG NANSHAN ALUMINUM
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