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Al-Mg-Si alloy plate and manufacturing method thereof

A technology of al-mg-si and alloy plates, which is applied in the field of aluminum alloy plates and its manufacturing, can solve problems such as low strength, failure to meet the requirements of automobile factories, and low strength increments

Inactive Publication Date: 2020-06-09
BAOSHAN IRON & STEEL CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0007] In the prior art, although adding Sn to the Al-Mg-Si alloy can obtain a certain effect of delaying the natural aging effect, there are few studies on the improvement effect of the long-term (180 days and above) natural aging stability of the aluminum plate, and After the aluminum plate is baked, the strength increment is not high, and the yield strength is low after baking, which cannot meet the requirements of the automobile factory for higher strength aluminum alloys

Method used

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  • Al-Mg-Si alloy plate and manufacturing method thereof
  • Al-Mg-Si alloy plate and manufacturing method thereof
  • Al-Mg-Si alloy plate and manufacturing method thereof

Examples

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Embodiment 1-6 and comparative example 1-2

[0066] Table 1 lists the mass percentage (wt%) of each chemical element in the Al-Mg-Si alloy sheets of Examples 1-6 and Comparative Examples 1-2.

[0067] Table 1. (wt%, the balance is Al and other unavoidable impurity elements except Cr and Zn)

[0068]

[0069] The manufacturing method of the Al-Mg-Si alloy plate of embodiment 1-6 and comparative example 1-2 is as follows (concrete process parameter is listed in table 2-1, table 2-2 and table 2-3):

[0070] (1) Melting and casting: According to the ratio of the chemical elements listed in Table 1, alloying elements and refiners are added to the industrial aluminum melt for smelting, wherein the alloying elements can be added by adding Al-Si master alloy, pure Cu, Al -Mn master alloy or Mn agent, pure Mg is added to the industrial aluminum melt, and the semi-continuous casting method is selected to rapidly cool from the liquidus temperature to the solidus temperature at a cooling rate of not less than 100°C per minute, an...

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Abstract

The invention discloses an Al-Mg-Si alloy plate. The plate comprises the chemical elements including, by mass, 0.4%-1.0% of Mg, 0.6%-1.2% of Si, 0.05%-0.15% of Sn, 0.05%-0.15% of Ti, 0-0.2% of Cu, 0-0.5% of Mn, smaller than or equal to 0.5% of Fe and the balance Al and other inevitable impurity elements. The invention further discloses a manufacturing method of the Al-Mg-Si alloy plate. The methodcomprises the steps including (1) casting; (2) homogenizing heat treatment; (3) hot rolling; (4) cold rolling; (5) solution treatment; (6) preageing treatment; and (7) pre-baking treatment with the heating temperature at 190-240 DEG C and the heat preservation time of 1-3 min. The Al-Mg-Si alloy plate provided by the invention has the long-term natural ageing stability and high baking hardening performance and formability.

Description

technical field [0001] The invention relates to an aluminum alloy plate and a manufacturing method thereof, in particular to an Al-Mg-Si alloy plate and a manufacturing method thereof. Background technique [0002] Energy saving and emission reduction has become one of the important goals of the development of the automobile industry, and automobile lightweight is the main direction to achieve this goal. Studies have shown that a 10% reduction in vehicle weight can increase fuel efficiency by (6-8)%. If a medium-sized car (1500Kg) reduces 350Kg, the exhaust gas of this car can be reduced by at least about 5250Kg within the service life. Aluminum alloy has become the first choice for automotive lightweight materials due to its light weight, wear and corrosion resistance, high specific strength, good impact resistance, easy coloring and recycling, among which Al- Mg-Si series aluminum alloys have good bake hardening properties (compared to Al-Mg series aluminum alloys) and g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C21/08C22C1/03C22F1/05
CPCC22C1/026C22C1/03C22C21/02C22C21/08C22F1/05
Inventor 曾渝杨兵苑锡妮冯伟骏
Owner BAOSHAN IRON & STEEL CO LTD
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