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Technological process of controlling initial phase in metastable-phase fined aluminium ingot

A technology of phase-refining aluminum and a process method, applied in the field of aluminum alloy processing, can solve the problems of unsatisfactory refining effect of coarse crystalline phase and poor surface quality, and achieve controllable refining effect, good refining effect and application range. wide effect

Inactive Publication Date: 2005-03-16
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, due to defects such as poor surface quality in the thin strip casting and rolling method, traditional hot-rolled billets are still required to produce high-quality aluminum foil products; and the conventional homogenization treatment is not ideal for refining the coarse crystal phase

Method used

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Experimental program
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Effect test

Embodiment

[0013] In the embodiment of the present invention, the alloy system is AA1235, and its chemical composition is shown in Table 1. The Fe content is adjusted between 0.38-0.46 wt%, and the Si content is adjusted between 0.10-0.13 wt%.

[0014] Cu

Mg

mn

Fe+Si

Zn

Ti

V

other

Al

no greater than

single

total

not less than

0.05

0.05

0.05

0.65

0.01

0.03

0.05

0.03

99.35

[0015] The ingot of 480×1060×4500mm is cast by semi-continuous casting process, the casting speed is 60mm / min, the casting temperature is 740°C, and the casting water pressure is 0.2MPa. The ingots were homogenized at 560°C for 13 hours and then hot-rolled. The starting temperature of hot rough rolling is higher than 480°C, and the finishing temperature of hot finishing rolling is higher than 220°C. The hot finish rolling thickness is 4.5mm. The hot finish rolling billet is cold-rolled ...

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Abstract

The present invention is a technological process of controlling initial phase in metastable phase fined aluminium ingot. By utilziing the different phase change reaction and relevant products of initial phase in high temperature zone and middle temperature phase, and through selecting proper heat treatment temperature and time, the phase change reaction is controlled to fine the initial phase, and thus to control the quality of crude aluminium foil. The said method proposes an initial phase fining way from phase formation, heredity and transformation, has wide adaptability and good and controllable fining, effect, and is suitable for industrial production.

Description

Technical field [0001] The invention belongs to the technical field of aluminum alloy processing, and in particular relates to a process method for controlling metastable phases and refining primary phases of aluminum ingots. Background technique [0002] 1××× alloy is the main material for producing high-quality double-zero aluminum foil. At present, the measurement indicators of high-quality double-zero aluminum foil at home and abroad mainly include three aspects: 1) pinhole rate; 2) yield rate; 3) coil weight (number of broken tapes). In order to improve the quality of aluminum foil, the aluminum foil industry is currently focusing on the upgrading and improvement of production equipment and processing technology. Because the thickness of the foil is very thin, during the rolling process, when the thickness of the wool is less than or close to the size of the compound in it, it is easy to produce pinholes at the coarse compound, and even cause the strip to break. After...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/04
Inventor 潘复生张静汤爱涛丁培道
Owner CHONGQING UNIV
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