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Cryogenic treatment method for inhibiting natural aging of aluminum alloy auto sheets

A technology of natural aging and cryogenic treatment, which is applied in the field of cryogenic treatment to suppress the natural aging of aluminum alloy automobile sheets, and can solve problems such as inhibiting the natural aging of aluminum alloy automobile sheets

Active Publication Date: 2018-02-27
CENT SOUTH UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] To sum up, the problem existing in the prior art is: in the processing process of the aluminum alloy automobile sheet in the prior art, there is no process for suppressing the natural aging of the aluminum alloy automobile sheet and improving its bake hardening ability through cryogenic treatment

Method used

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  • Cryogenic treatment method for inhibiting natural aging of aluminum alloy auto sheets
  • Cryogenic treatment method for inhibiting natural aging of aluminum alloy auto sheets
  • Cryogenic treatment method for inhibiting natural aging of aluminum alloy auto sheets

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Embodiment Construction

[0013] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0014] The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0015] Such as figure 1 As shown, the cryogenic treatment method for suppressing the natural aging of aluminum alloy automobile sheet provided by the embodiment of the present invention comprises the following steps:

[0016] S101: The 6000-series aluminum alloy automobile sheet is subjected to solution treatment at 540°C×30min, and then immediately quenched in water;

[0017] S102: Lower the temperature of the solid solution-quenched 6000 series aluminum alloy automobile plate to ab...

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Abstract

The invention belongs to the technical field of aluminum alloy auto sheet treatment technologies, and discloses a cryogenic treatment method for inhibiting natural aging of aluminum alloy auto sheets.Solution treatment is carried out on 6000-series aluminum alloy auto sheets under the condition of 540 DEG C for 30 minutes, and then the 6000-series aluminum alloy auto sheets are subjected to quenching treatment in water; firstly, the temperature of the 6000-series aluminum alloy auto sheets in the solid solution and quenching state is lowered to about minus 194 DEG C with liquid nitrogen; andthe 6000-series aluminum alloy auto sheets with the temperature lowered to minus 194 DEG C are stored in a liquid nitrogen constant temperature cabinet with the temperature of minus 80 DEG C. According to the cryogenic treatment method for inhibiting natural aging of aluminum alloy auto sheets, the cryogenic treatment amounts to carrying out natural aging under a very low temperature, the time offormation and transformation of clusters can be delayed, the number of GP areas is small, or the transformation of a GP area to a beta'' phase is delayed, the effect of inhibiting the natural aging ofauto sheets is achieved, and the toast hardening value of auto sheets is increased.

Description

technical field [0001] The invention belongs to the technical field of processing technology of aluminum alloy automobile plates, and in particular relates to a cryogenic treatment method for suppressing the natural aging of aluminum alloy automobile plates. Background technique [0002] Automobile lightweight is one of the current development directions of automobiles, especially the application of aluminum alloy sheets for automobile body is developing rapidly. The 6000 series aluminum alloy is a kind of medium-strength aluminum alloy with a series of valuable comprehensive properties such as high specific strength, good machinability, excellent welding performance and corrosion resistance, and high impact toughness. It is widely used in modern automobile technology . The composition of 6000 series aluminum alloy automotive sheet materials is generally Si: 0.75% ~ 0.10%; Fe: 0.15% ~ 0.23%; Cu: 0.005% ~ 0.30%; Mn: 0.50% ~ 0.70%; Mg: 0.5% ~ 0.7% ; Cr: 0.005% to 0.02%; Zn: ...

Claims

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Application Information

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IPC IPC(8): C22F1/04
Inventor 黄元春李莹
Owner CENT SOUTH UNIV
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