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Comprehensive utilization method of powder by-products generated in spray forming process and product application

A spray forming and by-product technology, which is applied in the field of material preparation, can solve storage problems, reduce spray forming efficiency and material utilization, and pollute the environment, and achieve the effects of fewer processes, high raw material utilization, and low preparation costs

Active Publication Date: 2020-11-13
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the industrial production process, it was found that since the spray forming technology includes two main processes of atomization powder making and deposition into billets, although most of the atomized metal molten droplets are deposited on the substrate to form dense billets or parts, However, there are a small amount of molten metal droplets that are not deposited on the substrate, but instead solidify to form individual powder particles
The generation of this extra powder particles not only reduces the spray forming efficiency and material utilization rate, but also with the accumulation of time, the increase of its amount faces storage problems and pollutes the environment

Method used

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  • Comprehensive utilization method of powder by-products generated in spray forming process and product application
  • Comprehensive utilization method of powder by-products generated in spray forming process and product application

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preparation example Construction

[0033] According to the preparation method of the present invention, the powder by-product produced in the process of spray forming 7055 aluminum alloy is used as raw material (powder morphology and particle size such as figure 1 c-e), its chemical composition meets the composition standard of 7055 aluminum alloy. From figure 1 The morphology of the powder by-products of c can be seen that the powder by-products produced during the spray-forming 7055 aluminum alloy process are significantly different from the commercially available standard 7055 aluminum alloy powders, that is, the fine particles are solidified together or solidified in the Powder cells are formed on the surface of large particles. Subsequently, put the weighed 7055 aluminum alloy powder into the steel mold cavity, and vibrate the mold sleeve to spread the powder in the mold cavity. Then, carry out press forming under the pressure of 400MPa by hydraulic press, make 7055 aluminum alloy green body. Finally,...

Embodiment 2

[0042] For example: using the powder by-products produced in the process of spray forming Al25Si4CuMg alloy as raw material to prepare high-performance Al25Si4CuMg alloy by hot pressing and sintering;

[0043] According to the preparation method of the present invention, the powder by-product produced in the spray forming Al25Si4CuMg alloy process is a raw material (powder appearance such as Figure 4 ), its chemical composition conforms to the composition standard of Al25Si4CuMg alloy. Put the weighed Al25Si4CuMg alloy powder into the steel mold cavity, and vibrate the mold cover to spread the powder in the mold cavity. Then, it is press-formed by a hydraulic press under a pressure of 400MPa to obtain an Al25Si4CuMg alloy green body. Finally, the green body is packed in a graphite mold and sintered and densified in a vacuum hot-press furnace. When the vacuum is pumped to 1×10 -2 When the temperature is 5°C / min, start heating at 5°C / min. When the sintering temperature is 68...

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Abstract

The invention provides a comprehensive utilization method of powder by-products generated in the spray forming process. The method comprises the steps that powder by-products are pressed, formed and sintered directly; the powder by-products mainly from extra powder generated in the spray forming green part preparation process, and are named as powder by-products in order to differ from a spray forming green part; according to the pressing forming, a hydraulic single column press or a four-column hydraulic press is adopted for loading the powder by-products into a steel mold to be formed, and agreen body is prepared; according to sintering, a vacuum hot pressing furnace is adopted for performing sintering densification, an alloy is prepared, and therefore the powder by-products are comprehensively utilized. According to the comprehensive utilization method of powder by-products generated in the spray forming process, the preparation technological process is short, the cost is low, operation is easy, convenient and flexible, the prepared materials have the structure and performance advantages of being fine in grain, uniform in structure, free of segregation and high in strength. Themethod can effectively achieve comprehensive utilization of powder by-products, the material utilization rate is increased, and the certain economic benefits are obtained.

Description

technical field [0001] The invention relates to a comprehensive utilization method of powder by-products produced in the spray forming process and the application of the products, belonging to the technical field of material preparation. Background technique [0002] Powder metallurgy is an industrial technology for producing metal powder or using metal powder (or a mixture of metal powder and non-metal powder) as raw material, forming and sintering to produce metal materials, composite materials and various types of products. Powder metallurgy technology has been widely used in transportation, machinery, electronics, aerospace, weapons, biology, new energy, information and nuclear industries, and has become one of the most dynamic branches of new material science. Powder metallurgy technology has a series of advantages such as significant energy saving, material saving, excellent performance, high product precision and good stability, and is very suitable for mass productio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/14B22F3/115
CPCB22F3/115B22F3/14
Inventor 马运柱王涛黄宇峰刘文胜刘超伍镭颜焕元赵心阅杨伦
Owner CENT SOUTH UNIV
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