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Method for improving heat treatment performance of 2219 aluminium alloy thin-walled curved part

A technology of curved surface parts and aluminum alloys, which is applied in the field of improving the heat treatment performance of 2219 aluminum alloy thin-walled curved surface parts, can solve the problems that cannot meet the structural strength requirements of storage tanks, and achieve the effects of pressure forming, tensile strength and yield strength improvement

Inactive Publication Date: 2016-04-20
SICHUAN AEROSPACE LONG MARCH EQUIP MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] It can be seen from the above table that compared with LD10 aluminum alloy melon petals, the tensile strength and yield strength that 2219 aluminum alloy can achieve are obviously lower, which cannot meet the structural strength requirements of the storage tank.

Method used

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  • Method for improving heat treatment performance of 2219 aluminium alloy thin-walled curved part

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Embodiment 1

[0017] A method for improving the heat treatment performance of 2219 aluminum alloy thin-walled curved surface parts, comprising the following steps: the 2219 aluminum alloy annealed melon petal raw material plate is clamped on the quenching heat treatment fixture as a whole, put into the furnace at a temperature of 530 ° C in a salt bath furnace, and quenched The transfer time is not more than 15s. The plate is molded on a 2200T press within 2 hours after it is released from the furnace. After forming, the allowance is cut. After the cutting is completed, it enters the air circulation furnace for artificial aging. The performance parameters of the processed parts are as follows: tensile strength Strength σb≥421MPa, yield strength σ0.2≥323MPa, elongation δ≥10.6%.

Embodiment 2

[0019] A method for improving the heat treatment performance of 2219 aluminum alloy thin-walled curved surface parts, comprising the following steps: the 2219 aluminum alloy annealed melon petal raw material plate is clamped on the quenching heat treatment fixture as a whole, put into the furnace at a temperature of 535 ° C in a salt bath furnace, and quenched The transfer time is not more than 15s. The plate is molded on a 2200T press within 2 hours after it is released from the furnace. After forming, the allowance is cut. After the cutting is completed, it enters the air circulation furnace for artificial aging. The performance parameters of the processed parts are as follows: tensile strength Strength σb≥436MPa, yield strength σ0.2≥365MPa, elongation δ≥10.9%.

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Abstract

The invention discloses a method for improving the heat treatment performance of a 2219 aluminium alloy thin-walled curved part, and belongs to the field of heat treatment of workpieces. The method comprises the following steps: after being fed and cleaned, an annealed plate is quenched, wherein the quenching temperature is 530-540 DEG C, and the quenching transferring time is less than or equal to 15 s; and within 2 h after quenching, the annealed plate is die-formed, and after being forming correcting is completed, the annealed plate is aged. In the method, heat treatment and pressure forming are combined, so that the pressure forming property, the tensile strength and the yield strength of the raw material, namely the annealed 2219 aluminium alloy thin-walled curved part are remarkably improved, the tensile strength sigma b of the annealed 2219 aluminium alloy thin-walled curved part is higher than or equal to 420 MPa, the yield strength sigma 0.2 of the annealed 2219 aluminium alloy thin-walled curved part is higher than or equal to 320 MPa, and the elongation delta of the annealed 2219 aluminium alloy thin-walled curved part is higher than or equal to 10.

Description

technical field [0001] The invention relates to the field of workpiece heat treatment, in particular to a method for improving the heat treatment performance of 2219 aluminum alloy thin-walled curved surface parts. Background technique [0002] In the fields of national defense, aviation and aerospace, the structural parts of the propellant storage tank were mainly made of LD10 aluminum alloy. After aging, the tensile strength σb≥435MPa, and the yield strength σ0.2≥370MPa. [0003] In recent years, with the development of aerospace models, 2219 aluminum alloy has also become the material of choice for tank structural parts. After forming and quenching aging, the tensile strength of this type of aluminum alloy is σb≥350MPa, and the yield strength is σ0.2≥235MPa. See the table below for specific comparison: 2A14 in the table is LD10 aluminum alloy, [0004] [0005] It can be seen from the above table that compared with LD10 aluminum alloy melon petals, the tensile streng...

Claims

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Application Information

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IPC IPC(8): C22F1/04
CPCC22F1/04C22F1/002
Inventor 陶明清贺爱国何顺周洪跃忠王凤婷王博
Owner SICHUAN AEROSPACE LONG MARCH EQUIP MFG CO LTD
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