Special powder materials near net shape manufacturing technology and application2

6. Catalog of main intellectual property rights, standards and specifications

Main intellectual property certification directory

7. Main Completers

First person to complete the project: Qu Xuehui, professor, working unit: University of Science and Technology Beijing. He is the proposer of the overall idea, academic ideas, theoretical and technical system of the project, as well as the organizer and implementer of key technology research and industrial application. Made significant contributions to innovation points 1-4. Invented new binders and forming and efficient degreasing processes suitable for different powder material systems. A two-phase collaborative motion model of "powder-binder" was established, and it was found that the "specific gravity difference" is the essential reason for the separation of the two phases. Increasing the interaction between the two phases can reduce the phenomenon of two-phase separation. For the first time, chaos theory was applied to the study of the injection molding process, clarifying the uncertainty mechanism of defect generation. A variety of new binders have been invented for different powders, which can effectively solve the problems of powder filling uniformity, shape retention of formed blanks, residual carbon or oxygenation, defects and dimensional accuracy control.

Second person who completed the project: Qin Mingli, working unit: University of Science and Technology Beijing. Participated in proposing the academic ideas, technical routes, and experimental plans of this project, presided over the basic and applied research on "near net shape manufacturing technology of high-performance special powder materials", and assisted in the implementation of technology transfer and application demonstration. Mainly participate in the research work of innovation points 1, 2 and 3. A new method for preparing spherical tungsten powder by combining dispersion classification and plasma spheroidization was invented. Based on the principles of surface energy and lattice distortion-enhanced sintering and structure activation sintering, a new process for metal tungsten and iron-based soft magnetic enhanced sintering was established; the principle of liquid phase sintering and degreasing carbon residue "deoxidation" was comprehensively used to solve the problem of high aluminum nitride The problems of densification, grain boundary phase quantity control and lattice purification. The sintering density of metallic tungsten and iron-based soft magnetic alloy products has been increased to more than 95%, the electron bombardment resistance of tungsten electrodes has been significantly improved, the maximum magnetic permeability of iron-based soft magnetic products has increased by 3-5 times, and the thermal properties of aluminum nitride The conductivity is as high as 248W·m-1·K-1.

3rd completer: Zhang Lin, professor, working unit: University of Science and Technology Beijing. Mainly participate in the research work of innovation points 2 and 3. Responsible for the research and product development of common key technologies in injection molding. In Innovation Point 1, "Established the reaction system and process for the synthesis of refractory metal and non-oxide ceramic powder by solution combustion, and the new technology of "air flow dispersion classification-plasma spheroidization" powder modification", and in Innovation Point 3, "Aimed at Regarding the problem of difficulty in sintering and densifying the degreased billet, based on the principles of fine-grain strengthened sintering and structural activation sintering, a new strengthened sintering process of metal tungsten and iron-based soft magnetic alloys was established.

The 4th completer: Wu Haoyang, lecturer, working unit: University of Science and Technology Beijing. Mainly participate in the research work of innovation points 1 and 3. Responsible for the research on new technologies for the preparation and modification of nearly spherical fine special powders and the development of injection molded products. The reaction system and process for solution combustion synthesis of refractory metal and non-oxide ceramic powder were established to prepare nanometer nearly spherical aluminum nitride powder with good dispersion and high sintering activity. A binder system based on polymer functional groups was developed to solve problems such as feed filling uniformity, shape retention, carbon residue or oxygenation, and defect control. Reduce product defects, degreasing and sintering deformation

Fifth completion person: Chongjin Lee, deputy general manager, working unit: Harber Industrial Ltd. Mainly involved in research work on innovation points 4, 2 and 3. It focuses on the development of near-net-shape macro-preparation technology for high-performance special powder materials, and owns relevant patent rights for key production equipment such as high-efficiency degreasing furnaces and sintering furnaces. It has established online inspection and monitoring of product size and appearance quality based on machine vision. An industrial production line for injection molding was established; the problem of applying new binders and soft magnetic alloy reinforced sintering technology to industrial production was overcome.

The 6th completer: Zhong Wei, working unit: Shanghai Fuchi High-Tech Co., Ltd. Mainly involved in research work on innovation points 4, 2 and 3. Responsible for promoting the construction of injection molding automated industrial production lines. A product inspection strategy based on machine vision was established, and software and hardware systems for online monitoring of size and appearance quality and dynamic grabbing, assembly and sorting of industrial robots were developed to achieve fully automated production. Overcame the problem of applying new binder and tungsten-based alloy strengthened sintering technology to industrial production.

8. Description of cooperative relationship between completers

The joint applicants for this project include University of Science and Technology Beijing, Harber Industrial Ltd., and Shanghai Fuchi High-Tech Co., Ltd. The following is a brief description of the cooperation relationship between the completers.

First person to complete the project: Qu Xuehui, who took the lead in conducting research on powder injection molding technology in my country in 2000. He is the proposer of the overall idea, academic ideas, and theoretical and technical systems of the project, and is also the organizer and implementer of key technology research and industrial application. . The main technical backbone of the leadership team of the first implementer. The second and third implementers jointly applied for 56 invention patents, jointly published 66 SCI papers, jointly identified 4 results, jointly applied for and won 2 Ministry of Education Technology Invention Awards, and the Nonferrous Metals Association 2 technological invention awards. In 2010, the first and fourth completers signed a cooperation agreement on the industrialization of powder injection molding technology on behalf of the University of Science and Technology Beijing and Harber Industrial Ltd. In 2015, the first and fifth completers signed a strategic partnership agreement with Shanghai Fuchi High-Tech Co., Ltd. on behalf of the University of Science and Technology Beijing.

The second completer: Qin Mingli, presided over the basic and applied research on "near net shape manufacturing technology of high-performance special powder materials", and assisted the first completer in implementing technology transfer and application demonstration. Together with the first person to complete the project, he jointly undertook and completed 2 national “973” plan projects, 2 national “863” plan projects, and 2 supporting projects for the population.

The third person who completed the project: Zhang Lin, is responsible for the research and product development of common key technologies in injection molding. Together with the first and second finishers, we jointly undertook and completed one national “863” plan project and two supporting projects for the population. Cooperated with the fifth person to develop metal fan blades for laptops, and jointly applied for and won the product award at the World Powder Metallurgy Conference.

The 4th completer: Wu Haoyang, responsible for the research on new technologies for the preparation and modification of nearly spherical fine special powders and the development of injection molded products. Together with the 2nd completer, he applied for a National Natural Science Foundation of China project. Cooperated with the 2nd and 6th completers to develop a mobile phone flip camera housing, jointly applied for and won the product award at the World Powder Metallurgy Conference.

The fifth person to complete the project: Chongjin Lee, focusing on the development of near-net-shape macro-preparation technology for high-performance special powder materials. Worked with the 1st, 2nd and 3rd completers to promote the industrialization of near net shape manufacturing technology, solved key issues such as process matching, parameter optimization and automated production in the industrialization process, and established a high-performance composite metal injection molding technology production line.

The 6th completer: Zhong Wei, the master tutor is the 1st completer. Cooperating with the first and second completers, he is responsible for promoting the construction of injection molding automated industrial production lines, and is the first to try to apply machine vision-based online inspection and monitoring technology of product size and appearance quality to injection molding industrial production.