Forging method of high-strength 6A02 forged pieces used for special temperature control equipment

Abstract

The invention provides a forging method of high-strength 6A02 forged pieces used for special temperature control equipment. Adopted forging deformation modes comprise the steps that when the thicknessof one forged piece which needs to be obtained is less than that of a preset forged piece and the height-diameter ratio of a corresponding ingot is in an optimal height-diameter ratio range, upsetting is directly conducted; when the thickness of one forged piece which needs to be obtained is less than that of the preset forged piece and the height-diameter ratio of the corresponding ingot is lessthan the minimum value of the optimal height-diameter ratio range, the corresponding ingot is drawn out until the height-diameter ratio of the corresponding ingot is in the optimal height-diameter ratio range, and then upsetting is conducted; when the thickness of one forged piece which needs to be obtained is larger than or equal to that of the preset forged piece, upsetting, drawing out and upsetting are conducted in sequence. According to the forging method, the different forging deformation modes are chosen according to the different thicknesses of the forged pieces and the different height-diameter ratios of the ingots, so that it is guaranteed that microscopic coarse grains of the forged pieces do not exist, the performance of the forged pieces is way beyond the longitudinal standards, the redundancy is large and steady, the performance of the forged piece structures is improved, and the qualification ratio of the performance of the 6A02 forged pieces is improved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy processing, more specifically, to a forging method of high-strength 6A02 forgings for special temperature control equipment. Background technique [0002] 6A02 aluminum alloy refers to wrought aluminum with the grade of 6A02, which is mainly used in the manufacture of aviation equipment, daily necessities, doors and windows for construction, etc. High-strength 6A02 aluminum alloy forgings are used for special air-conditioning centrifugal compressors of Zhuhai Gree Electric Appliances Co., Ltd. There are 31 kinds of high-strength 6A02 forgings for special temperature control equipment. The minimum thickness of the forgings is 40mm, the maximum thickness is 160mm, the minimum outer diameter is Φ180, and the largest outer diameter is Φ530. High yield strength up to 245MPa. [0003] However, according to the original conventional production process, the pass rate of this type of forging produ...

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Problems solved by technology

[0003] However, the pass rate of this type of forging produced according to the original conventional production process is low, and the unqualified rate of yield strength and elongation is about 30%.

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