Manufacturing technology of high-strength heat-resistant aluminum alloy forge piece
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A manufacturing process, aluminum alloy technology, applied in the field of aluminum alloy ring forming and heat treatment process, can solve the problems of energy consumption, unqualified products, low radial elongation, etc., to improve heat resistance, consistent deformation, Deformation is fully uniform
Active Publication Date: 2018-11-27
JIANGSU UNIV OF TECH
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At present, the manufacturing process of 2219 aluminum alloy ring forgings in China is to perform homogenization annealing on the aluminum alloy, free forging, punching, reaming, and ring rolling after reheating, and then T852 heat treatment. Although the strength is effectively improved, it is still prone to occurrence Low radial elongation leads to unqualified products; in addition, multiple reheating is required during the molding process, resulting in huge energy consumption
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[0026] Example 1: A high-strength heat-resistant 2219 aluminum alloy forging manufacturing process is as follows:
[0027] (1) Material preparation: Cut the 2219 aluminum alloy extruded round bar of H112 state (hot-worked state) Φ300 to 590±5mm according to the weight of the process requirements, and mark the end face of the billet with a marker pen before forging to distinguish the three parts during forging Direction, get raw materials;
[0028] (2) Heating: Put the raw material obtained in step (1) into a furnace at room temperature, raise the temperature to 530±5°C for 4 hours according to the power (≤150°C / h), then cool down to 490±5°C for 2 hours, and then hold for 2 hours for forging Pre-heating, and ensure the uniformity of the furnace temperature, so that the raw materials can be evenly heated;
[0029] (3) Multi-axis forging: Forging the soaked raw materials obtained in step (2), keeping the initial forging temperature at 460-490°C and the final forging temperature ...
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Abstract
The invention discloses a manufacturing technology of a high-strength heat-resistant aluminum alloy forge piece. The manufacturing technology comprises the following steps of material preparation, heating, multi-axial forging, machining, heating, trestle broaching, heating, ring rolling, machining, annealing, solid solution hardening, cold pressing deformation, ageing and the like, wherein the ring rolling technology is divided into three temperature sections for rolling, in the first temperature section, the deformation temperature is 420-450 DEG C, the feeding speed of a core roller is 0.2-0.5 mm / s, and the deformation quantity is 20-25%; in the second temperature section, the deformation temperature is 300-340 DEG C, the feeding speed of the core roller is 0.1-0.3 mm / s, and the deformation quantity is 10%; in the third temperature section, the deformation temperature is 200-240 DEG C, the feeding speed of the core roller is 0.05-0.2 mm / s, and the deformation quantity is 10%.
Description
technical field [0001] The invention relates to a forming and heat treatment process of an aluminum alloy ring, in particular to a manufacturing process suitable for a 2219 high-strength and heat-resistant aluminum alloy ring forging. Background technique [0002] The 2000-series high-strength and high-toughness aluminum alloy has the characteristics of low density, high specific strength, good thermal strength, corrosion resistance, good processability, easy recycling, and heat treatment strengthening. It is the preferred material for lightweight aircraft and spacecraft. In recent years, with the development of aerospace technology, the demand for aluminum alloy ring forging rings has increased rapidly, and higher and higher requirements have been put forward for the consistency and stability of product structure and performance. In production, the mechanical properties of 2219 aluminum alloy forgings are unstable after forming and heat treatment, especially the radial and ...
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