Powder filling method of beryllium material forming blank for CETR

Abstract

The invention discloses a powder filling method of a beryllium material forming blank for a CETR. The method includes the steps that 1, a required beryllium powder filling amount is calculated; 2, materials are prepared and loaded into a feeder of a closed feeding device, and the feeder is sealed; 3, a first vibrating motor is started to drive the feeder to vibrate so as to feed beryllium powder into a sheath connected with the feeder in a sealed mode; and 4, a second vibrating motor is started, the vibrating frequency of a vibrating platform is adjusted, and the beryllium powder in the sheathis compacted by vibration, wherein when the filling amount of the beryllium powder is 90-100%, the vibrating frequency is adjusted to 0-80 Hz, when the filling amount of the beryllium powder is 70-90%, the vibrating frequency is adjusted to 80-120 Hz, and when the filling amount of the beryllium powder is 0-70%, the vibrating frequency is adjusted to 120-180 Hz. By means of the method, the tap density and uniformity of the beryllium powder filling the sheath are guaranteed, the compaction performance requirements can be met, and the powder filling efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal metallurgy, and in particular relates to a powder loading method for a beryllium material forming blank for a CETR reactor. Background technique [0002] Beryllium is a rare metal with remarkable comprehensive physical, thermal and mechanical properties, and is widely used in various fields such as aerospace. Both beryllium and beryllium compounds are toxic. The toxicity of beryllium is mainly caused by the infection of beryllium on the respiratory organs and the dermatitis caused by direct skin contact. The protection against beryllium should be strengthened during the manufacturing process of beryllium products. In the manufacturing and processing technology of metal materials, powder metallurgy is one of the important manufacturing methods. Powder metallurgy is a technology that transforms powder materials with a certain particle size, shape and bulk density into materials with high s...

AI Technical Summary

Problems solved by technology

Beryllium powder has poor fluidity and low bulk density, and the tap density of the powder will directly affect the quality of the compact, especially for expensive and toxic powders such as beryllium powder. After the powder is filled into the bag, it is hand-tamped, so there are deficiencies: 1. Fill the beryllium powder into the bag and tamp it to a certain filling density. The filling density of the powder cannot meet the performance requirements of the compact; 2. The fluidity of the beryllium powder is poor, resulting in poor uniformity of the powder after compaction, because the size uniformity and straightness of the compact depend on the uniformity of the powder filling, which affects the size of the compact Uniformity and straightness; 3. The tamping process is a non-airtight operation, and inclusions are easy to occur in the powder, which will affect the performance and material stability of the formed blank

In particular, the maximum size of beryllium products for Φ300~700mmCETR reactors reaches 700mm, which requires a large amount of raw material powder, and the powder filling time is too long and the production efficiency is low

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