Treatment method for improving bending property of T5-state 6N01 aluminum alloy

A processing method and bending performance technology, which is applied in the processing field of improving the bending performance of T5 state 6N01 aluminum alloy, can solve the problem of high energy consumption and cost, difficulty in guaranteeing performance, difficulty in controlling the external dimensions, surface quality, internal structure and deformation of plates and profiles etc. to achieve low cost, easy operation and easy control of product quality

Active Publication Date: 2014-09-10
NANJING ZHONGCHE PUZHEN URBAN RAIL VEHICLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method improves the bending and forming performance by changing the 6N01 aluminum alloy plate and profile from the T5 state to the T4 state, but this method needs to undergo high-temperature solution treatment and aging treatment again, and the energy consumption and cost are high, and the high temperature of the aluminum alloy Solution treatment and aging treatment require special equipment. It is difficult to control the external dimensions, surface quality, internal structure and deformation of plates and profiles after treatment. It is also difficult to guarantee whether the performance after aging treatment will reach the original T5 state. Therefore, it is necessary to develop a A method of directly improving the bending properties of plates and profiles without changing the T5 state of 6N01 aluminum alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Samples processed by this program: Take out after being kept warm for 2 hours at liquid nitrogen temperature. After the temperature rises to room temperature, keep the samples at 80°C for 24 hours (usually put the samples in a heating furnace at 80°C for 24 hours. hours); the treated sample was tested for bending and mechanical properties, the strength was 273MPa, and the elongation was 16.3%. The bending radius is 12.2mm, the relative bending radius is 2.44, and the bending performance is improved compared with the untreated sample.

Embodiment 2

[0021] Samples processed by this program: Take out after being kept warm for 2 hours at the temperature of liquid nitrogen. After the temperature rises to room temperature, keep the samples at 100°C for 48 hours (generally put the samples in a heating furnace at 100°C for 48 hours. Hours); bending and mechanical performance tests were performed on the treated samples, the strength was 272MPa, and the elongation was 16.1%. The bending radius is 12.1mm, the relative bending radius is 2.42, and the bending performance is improved compared with the untreated sample.

Embodiment 3

[0023] Samples processed by this program: Take out after being kept warm for 10 hours at the temperature of liquid nitrogen, and after the temperature rises to room temperature, keep the samples at 100°C for 48 hours (usually put the samples in a heating furnace at 100°C for 48 hours. Hours); the treated sample was tested for bending and mechanical properties, the strength was 275MPa, and the elongation was 16%. The bending radius is 11.8mm, the relative bending radius is 2.36, and the bending performance is improved compared with the untreated sample.

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Abstract

The invention discloses a treatment method for improving the bending property of a T5-state 6N01 aluminum alloy. The treatment method comprises the following steps: (1) the T5-state 6N01 aluminum alloy is put in liquid nitrogen for cooling 2-24 hours, and then is taken out; and (2) after the temperature is risen to the room temperature again, the insulation treatment is performed for the T5-state 6N01 aluminum alloy in a temperature range of 80-120 DEG C. The treatment method for directly improving the bending property of plates and profiles is realized without changing the T5 state of the 6N01 aluminum alloy.

Description

technical field [0001] The invention relates to a treatment method for improving the bending performance of a T5-state 6N01 aluminum alloy, and belongs to the technical field of non-ferrous metal material processing engineering. Background technique [0002] 6N01 aluminum alloy is a new type of high-speed vehicle material developed in Japan on the basis of 6000 series alloys in the 1980s. It belongs to the Al-Mg-Si series aluminum alloy. welding performance. Widely used in high-speed trains, subway trains, double-decker trains and passenger and freight cars, it is a good material for the thin-walled hollow large-scale profiles required for the manufacture of car bodies. The usual supply state of 6N01 aluminum alloy is T5 state, that is, the state of solution treatment and incomplete artificial aging. At this time, the aluminum alloy has higher strength and certain plasticity. In the process of manufacturing the car body, the T5 state 6N01 aluminum alloy sheets and profiles...

Claims

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Application Information

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IPC IPC(8): C22F1/04
Inventor 武美妮王未徐凤林李晓东李东风云中煌
Owner NANJING ZHONGCHE PUZHEN URBAN RAIL VEHICLE CO LTD
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