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Heat treatment method for high-strength large-size aluminum alloy thick-wall ring part with controllable elongation

A heat treatment method and technology of aluminum alloy, applied in the field of heat treatment of aluminum alloy thick-walled rings, can solve the problems of ring wall thickness, low alloy strength, large size, etc., and achieve the effect of improving strength, toughness and high strength

Inactive Publication Date: 2015-12-23
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing large-scale aluminum alloy thick-walled rings are large in size, thick in ring walls, and the θ" phase formed by insufficient cooling rate in the core during quenching causes the S' phase content to decrease, which in turn leads to To solve the problem of low alloy strength, a high-strength and controllable elongation heat treatment method for large aluminum alloy thick-walled rings is provided

Method used

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  • Heat treatment method for high-strength large-size aluminum alloy thick-wall ring part with controllable elongation
  • Heat treatment method for high-strength large-size aluminum alloy thick-wall ring part with controllable elongation
  • Heat treatment method for high-strength large-size aluminum alloy thick-wall ring part with controllable elongation

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specific Embodiment approach 1

[0016] Specific implementation mode 1: In this implementation mode, the high-strength controllable elongation heat treatment method for large-scale aluminum alloy thick-walled rings is implemented according to the following steps:

[0017] 1. Use wire cutting to cut the 2A14 aluminum alloy thick-walled ring, then put it into a box-type resistance furnace, keep it warm at a temperature of 490-500°C for 1.8-2.5 hours, take out the 2A14 aluminum alloy thick-walled ring and quickly transfer it to 50 Quenching treatment is carried out in hot water at ~70°C to obtain aluminum alloy thick-walled rings after solid solution quenching;

[0018] 2. Use a three-roll rolling mill to carry out repeated hot-rolling treatment on the ring inner wall of the aluminum alloy thick-walled ring after solid solution quenching by means of ring rolling. 280°C, the rolling deformation per pass is 30% to 40%, and the hot-rolled aluminum alloy wall ring is obtained by rolling;

[0019] 3. Put the hot-rol...

specific Embodiment approach 2

[0022] Embodiment 2: This embodiment differs from Embodiment 1 in that the wall thickness of the 2A14 aluminum alloy thick-walled ring described in step 1 is 190-210 mm. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0023] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the outer diameter of the 2A14 aluminum alloy thick-walled ring described in step 1 is 1800-2000 mm. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a heat treatment method for an aluminum alloy thick-wall ring part, in particular to a heat treatment method for a high-strength large-size aluminum alloy thick-wall ring part with controllable elongation and aims at solving the problem that a thick-wall ring part is low in alloy strength. The heat treatment method comprises the steps of cutting a 2A14 aluminum alloy thick-wall ring part, preserving the temperature at 490-500 DEG C, conducting quenching treatment and solid solution, and obtaining the aluminum alloy thick-wall ring part; 2, adopting a three-roll mill for conducting hot rolling on the aluminum alloy thick-wall ring part; 3, then conducting cold rolling treatment on the aluminum alloy thick-wall ring part obtained after the hot rolling; 4, conducting aging treatment for 2-5 hours at the temperature of 150-200 DEG C. According to the method, the formation of a theta'' phase is inhibited through a cold deformation method, the aging process is controlled so that the core portion of an aluminum alloy thick-wall ring can have high strength, the tensile strength of the aluminum alloy thick-wall ring part obtained after the heat treatment reaches 480 MPa, the yield strength reaches 460 MPa, and the elongation of the aluminum alloy thick-wall ring part is controllable within a certain range.

Description

technical field [0001] The invention relates to a heat treatment method for an aluminum alloy thick-walled ring. Background technique [0002] 2A14 aluminum alloy is a commonly used structural material in the aerospace industry. It has high strength, good forging performance, heat resistance, and good weldability. It is widely used in aerospace industry, rubber and plastic mold manufacturing and other fields. The large frames and rings have been widely used. After the alloy is processed by annealing, quenching, aging and other processes, the aluminum alloy will have many excellent working properties. The strengthening mechanism of 2A14 aluminum alloy is to dissolve θ equally, and then cool rapidly, so that the equilibrium phase in the alloy has no time to precipitate, so as to obtain a supersaturated solid solution, and then perform aging treatment on the alloy in the solid solution state, and precipitate phases in the alloy during the aging process , dispersed on the matr...

Claims

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Application Information

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IPC IPC(8): C22F1/04
Inventor 孟祥龙高智勇吴冶衣晓洋蔡伟
Owner HARBIN INST OF TECH
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