High-quality aluminum alloy for semiconductor and preparation method of high-quality aluminum alloy

Abstract

The invention relates to a preparation method of a high-quality aluminum alloy for a semiconductor. The preparation method comprises the following steps of: step 1, obtaining an aluminum alloy cast ingot by adopting a semi-continuous casting process; 2, homogenizing the aluminum alloy cast ingot by adopting a multi-stage homogenizing heat treatment process; 3, carrying out cryogenic treatment on the homogenized aluminum alloy cast ingot; 4, after the cryogenic treatment, subjecting the aluminum alloy cast ingot to low-forging-frequency, high-forging-ratio and intermediate stress relief annealing iterative forging; and 5, sequentially carrying out high-temperature short-time solid solution treatment, finishing and low-temperature long-time aging treatment on the forged piece obtained in thestep 4 to obtain the high-quality aluminum alloy for the semiconductor. By means of the method, dynamic recovery, dynamic recrystallization and sub-dynamic recrystallization of an alloy structure inthe forging deformation process are well restrained, the grain refinement effect on the structure is remarkable, the performance is excellent, the plasticity level is better, and the machining performance is excellent.

Description

technical field

[0001] The invention relates to the technical field of pressure processing of nonferrous metals, in particular to a high-quality aluminum alloy for semiconductors and a preparation method thereof. Background technique

[0002] The invention relates to a high-quality aluminum alloy for semiconductors belonging to the Al-Mg-Si series alloy. Due to its good processing performance, excellent welding performance and corrosion resistance performance, this series of alloys is widely used in aerospace, rail transit, automobile industry, electronic information and other fields have been widely used.

[0003] High-quality aluminum alloy refers to an aluminum alloy with no metallurgical defects, fine and uniform alloy structure, and good performance. With the rapid improvement of the comprehensive technology level of the semiconductor industry, the demand for high-quality aluminum alloys has increased rapidly. However, the same type of domestic aluminum alloy products ...