Preparing method for ultrathin metal powder for 3D printing and soft magnetic paster integrated component

Abstract

The invention discloses a preparing method for ultrathin metal powder for a 3D printing and soft magnetic paster integrated component and relates to the technical field of manufacturing of metal powder. The preparing method comprises the following steps: (1) dosing: dosing the raw materials including metal pure iron, metal chromium, metal nickel, metal cobalt and metal silicon according to a proportion; (2) smelting: placing the well-dosed raw materials in a smelting crucible to obtain solution ingredients; (3) high pressure gas atomizing: pouring the solution ingredients into a thermal insulation crucible, wherein the molten solution flows into a high pressure vacuum gas atomizing furnace by a small hole in the bottom of the thermal insulation crucible and is subjected to impact atomizingof high pressure nitrogen gas, so as to prepare the metal powder with a particle size of 10-100 micrometers; and (4) screening and annealing: grading the metal powder according to the particle size by a spin vibration sieve, and then annealing the graded metal powder to obtain a powder material. The preparing method has the advantages of improving the performances of the metal powder and controlling the parameters of the metal powder according to needs.

Description

technical field [0001] The invention relates to the technical field of metal powder manufacturing, and more specifically relates to a preparation method of ultrafine metal powder for 3D printing and soft magnetic patch integrated components. Background technique [0002] At present, 3D printing has been widely used in industrial modeling, machinery manufacturing, military, construction, film and television, household appliances, light industry, medicine, archaeology, culture and art, sculpture, jewelry and other fields, and with the development of this technology itself, its The application field will continue to expand. Most of the high-performance alloy powder raw materials required for 3D printing and patch metal soft magnetic components have been controlled by developed countries represented by Japan and Europe for a long time. The products of domestic powder raw material suppliers no matter However, there is a large gap in performance and quality stability. Therefore, m...

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Problems solved by technology

[0002] At present, 3D printing has been widely used in industrial modeling, machinery manufacturing, military, construction, film and television, household appliances, light industry, medicine, archaeology, culture and art, sculpture, jewelry and other fields, and with the development of this technology itself, its The application field will continue to expand. Most of the high-performance alloy powder raw materials required for 3D printing and patch metal soft magnetic components have been controlled by developed countries represented by Japan and Europe for a long time. The products of domestic powder raw material suppliers no matter However, there is a large gap in performance and quality stability. Therefore, most domestic factories face the unfavorable situation that both ends are outside, which seriously hinders the healthy development of related domestic industries.

[0003] The components made of domestic metal soft magnetic materials are mainly SMD solid-state inductors and magnetic cores. After years of development, my country has made breakthrough progress in the preparation technology of metal soft magnetic components, and some product performance indicators have reached or approached the international advanced level. However, in terms of comprehensive technical performance, there is still a significant gap compared with foreign advanced levels, and there is a large gap compared with foreign products in terms of DC superposition characteristics and power loss. Overall, it is about 5 to 10 years behind. The root cause It is my country's backwardness in the preparation technology of metal soft magnetic powders. Due to the difficulty in the development of high-performance metal soft magnetic powders and the long cycle, few domestic units are willing to invest in related work, resulting in my country's high-performance iron-silicon ultrafine metals. Soft magnetic powder and devices have always needed to be imported, and there is an urgent need to develop and produce this material, and some products of this material are embargoed abroad

[0004] Domestic research on powders for 3D printing technology has not yet been carried out, such as the influence and adaptability of powder components, inclusions, and physical properties on 3D printing related technologies. Research work on powder composition design, fine particle size powder gas atomization pulverization technology, powder characteristics on product performance, etc.

Due to the limitation of powder making technology in China, it is difficult to prepare fine-grained powder, the powder yield is low, and the content of oxygen and other impurities is high. During use, the powder melting state is prone to unevenness, resulting in high oxide inclusion content and denseness in the product. The main problems of domestic alloy powders are concentrated in product quality and batch stability, including: ① Stability of powder composition (inclusion quantity, composition uniformity); ② Powder physics Performance stability (particle size distribution, powder morphology, fluidity, bulk ratio, etc.); ③ yield problem (low yield of narrow particle size powder), etc.

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