A stress relief method for a thin-walled aluminum alloy impeller
An aluminum alloy impeller, thin-walled technology, applied in the field of stress removal and stress removal of thin-walled aluminum alloy impeller, can solve problems such as inconvenience, and achieve the effect of ensuring accuracy and stability
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Embodiment 1
[0035] This embodiment provides a thin-walled aluminum alloy impeller stress relief method, including the following steps:
[0036] S1 casting
[0037] The thin-walled aluminum alloy impeller of φ1200 is obtained by plaster casting.
[0038] S2 buried sand cooling
[0039] After the casting is completed, remove the outer mold and keep the plaster mold, bury the casting at 450°C in a quartz sand pit and cool slowly, the sand covering thickness is 100mm, cool down in the sand pit for 24 hours, and the surface drops from 450°C to room temperature. The casting takes about 8 hours in the air, the cooling speed is slowed down by sand cooling, and the casting stress caused by the cooling shrinkage is slowed down; in addition, the casting is made of plaster casting, which has good thermal insulation performance. After the casting is placed in the sand pit, the reduction The cooling rate difference between the inner and outer surfaces of the casting is eliminated, and the local stres...
Embodiment 2
[0053] This embodiment provides a thin-walled aluminum alloy impeller stress relief method, including the following steps:
[0054] S1 casting
[0055] The thin-walled aluminum alloy impeller of φ1000 is obtained by plaster casting.
[0056] S2 buried sand cooling
[0057] After the casting is completed, remove the outer mold and keep the plaster mold, bury the casting at 450°C in a quartz sand sand pit and cool slowly, the sand covering thickness is 90mm, and the surface is cooled from 450°C to room temperature in the sand pit for 22 hours, while the same working condition Under this condition, the casting takes about 7 hours in the air.
[0058] S3 heat treatment
[0059] Solution treatment: After cleaning the gypsum of the cooled impeller casting, keep the casting at 535°C for 10 hours;
[0060] Quenching: After solid solution, it falls into the 60°C quenching medium, and the quenching water transfer time is 15S.
[0061] S4 high temperature vibration aging
[0062] T...
Embodiment 3
[0071] This embodiment provides a thin-walled aluminum alloy impeller stress relief method, including the following steps:
[0072] S1 casting
[0073] The thin-walled aluminum alloy impeller of φ800 is obtained by plaster casting.
[0074] S2 buried sand cooling
[0075] After the casting is completed, remove the outer mold and keep the plaster mold, bury the casting at 400°C in a quartz sand pit and cool slowly, the sand covering thickness is 80mm, cool down in the sand pit for 20 hours, and the surface drops from 400°C to room temperature. Under this condition, the casting takes about 7 hours in the air.
[0076] S3 heat treatment
[0077] Solution treatment: After cleaning the cooled impeller casting gypsum, keep the workpiece at 530°C for 12 hours;
[0078] Quenching: After solid solution, it falls into the 80°C quenching medium, and the quenching water transfer time is 20S.
[0079] S4 high temperature vibration aging
[0080] The quenched castings were aged at 160...
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Abstract
Description
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Application Information
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