WO2024124798A1 - Preparation device and method for 3d printing titanium alloy powder with fluidity - Google Patents

Preparation device and method for 3d printing titanium alloy powder with fluidity Download PDF

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WO2024124798A1
WO2024124798A1 PCT/CN2023/094749 CN2023094749W WO2024124798A1 WO 2024124798 A1 WO2024124798 A1 WO 2024124798A1 CN 2023094749 W CN2023094749 W CN 2023094749W WO 2024124798 A1 WO2024124798 A1 WO 2024124798A1
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Prior art keywords
turbine classifier
powder
titanium alloy
level
alloy powder
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PCT/CN2023/094749
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French (fr)
Chinese (zh)
Inventor
谢波
刘永胜
吴旺
刘芯宇
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成都先进金属材料产业技术研究院股份有限公司
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Publication of WO2024124798A1 publication Critical patent/WO2024124798A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0896—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid particle transport, separation: process and apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the invention belongs to the field of aerosol powder making and powder screening, and specifically relates to a device and method for preparing fluid 3D printing titanium alloy powder.
  • 3D printing technology has the advantages of high precision, short cycle, material saving, and the ability to prepare complex one-piece parts. It has become the latest research focus at home and abroad.
  • metal laser 3D printing metal powder is the material basis for rapid prototyping of printed parts. The morphology, fluidity, oxygen content, bulk density, and particle size of metal powder directly determine the final performance of 3D printed parts.
  • Metal laser 3D printing is divided into powder spreading printing and powder feeding printing. The current mainstream method is powder spreading printing. Powder spreading printing requires metal powder to have good fluidity. The better the fluidity of the powder, the more uniform the powder spreading. Powder with good fluidity can not only improve the dimensional accuracy and surface quality of 3D printed products, but also improve the uniformity and density of the molded parts, which can shorten the processing time.
  • Printing powder is generally prepared by atomization.
  • the basic principle of atomization is to use high-speed airflow to scour liquid metal into small droplets and then solidify them into powder.
  • the powder prepared by this method is generally normally distributed, with a particle size distribution range of 0 to 300 ⁇ m.
  • ultrafine powder with a particle size of -15 ⁇ m will inevitably be produced, and the ultrafine powder will be adsorbed on the surface of other powders, affecting the fluidity of the powder.
  • the powder will inevitably come into contact with the air during the transfer, screening, packaging, and storage process.
  • the moisture in the air will make the powder surface moist, affecting the fluidity of the powder. Poor powder fluidity will affect the thickness and uniformity of the powder.
  • the oxygen in the air will oxidize the powder surface and increase the oxygen content of the powder.
  • the above problems will lead to incomplete sintering of the powder and low bonding strength during the printing process, and the performance of the resulting prints will not meet the standards.
  • Chinese patent: CN110420854A a method for screening 3D printing powder, uses an airflow classifier to screen the aerosolized powder, removes the ultrafine powder with a particle size of -15 ⁇ m, and obtains a powder with a particle size in the range of 15 to 250 ⁇ m; uses a glove box to ultrasonically screen the powder with a particle size in the range of 15 to 250 ⁇ m, and obtains a printing powder with a particle size in the range of 15 to 45 ⁇ m; and encapsulates the printing powder with a particle size in the range of 15 to 45 ⁇ m.
  • the present invention continuously screens the aerosolized powder, and removes the ultrafine powder and large-particle powder in the powder in turn; by controlling the speed and air intake of the airflow classifier wind wheel, the ultrasonic frequency and screening time of the ultrasonic vibration screening machine, the amount of ultrafine powder is effectively reduced, and by controlling the water content, oxygen content and other parameters of the glove box, the humidity and oxygen increase of the printing powder are effectively reduced, and the vacuum packaging is prevented by the inflatable packaging to prevent the powder from agglomerating and sticking, which affects the fluidity of the powder.
  • the first aspect of the present invention provides a device for improving the fluidity of 3D printed titanium alloy powder.
  • the device process of the present invention is simple and has the advantages of high screening efficiency and low oxygen content, so that the prepared titanium alloy powder has good fluidity.
  • a preparation device for 3D printing titanium alloy powder with fluidity comprising: a feeding bin, a spiral feeder, a first-level turbine classifier, a first-level powder collecting tank group, a second-level turbine classifier, a second-level powder collecting tank group, an oxygen content sensor, a dust collector, an induced draft fan and a cold dryer;
  • the feeding bin is connected to the spiral feeder
  • the spiral feeder is connected to the first-level turbine classifier
  • the upper part of the first-level turbine classifier is connected to the second-level turbine classifier
  • the lower part of the first-level turbine classifier is connected to the first-level powder collecting tank group
  • the upper part of the second-level turbine classifier is connected to the dust collector
  • the lower part of the second-level turbine classifier is connected to the second-level powder collecting tank group
  • the dust collector is connected to the induced draft fan
  • the induced draft fan is connected to the spiral feeder
  • the oxygen content sensor is arranged between the second-level turbine classifier and the dust collector
  • the cold dryer is
  • the screw feeder is connected to the first-stage turbine classifier via an inclined feeding pipe.
  • the cross-sectional sealing gap of the first-stage turbine classifier is 5 mm, and the blade inclination angle of the first-stage classifying wheel of the first-stage turbine classifier is 25°-30°.
  • the cross-sectional sealing gap of the two-stage turbine classifier is 2.5 mm, and the blade inclination angle of the two-stage classifier wheel of the two-stage turbine classifier is 15°-20°.
  • the second aspect of the present invention provides a method for preparing 3D printing titanium alloy powder with fluidity.
  • the present invention is an efficient, low-cost and safe powder screening and post-processing method.
  • the preparation method of the present invention comprises the following technical scheme:
  • a method for preparing a 3D printing titanium alloy powder with fluidity comprising the preparation device described above, the preparation method comprising the following steps:
  • S300 Turn on the cold dryer, turn on the first-stage classifying wheel of the first-stage turbine classifier, turn on the second-stage classifying wheel of the second-stage turbine classifier, and turn on the screw feeder;
  • the inert gas is high-purity argon gas with a purity greater than 99.99%.
  • the inert gas inflation pressure is 0.2-0.3Mpa.
  • the exhaust pressure of the induced draft fan is 0.25-0.35 MPa
  • the air inlet speed is 8-10 m/s
  • the air volume is 1200-1500 m 3 /h.
  • the preset value is 120-150 ppm.
  • the classification frequency of the first-stage classification wheel is 8-10 Hz
  • the classification frequency of the second-stage classification wheel is 16-18 Hz.
  • the present invention has the following advantages:
  • the device process of the present invention is simple, and has the advantages of high screening efficiency and low oxygen content, so that the prepared titanium alloy powder has good fluidity.
  • the present invention is an efficient, low-cost and safe powder screening and post-processing method.
  • the method of the present invention achieves efficient separation by controlling the air volume and flow rate of the induced draft fan, and the parameters and frequency of the primary and secondary classifying wheels; by controlling the appropriate argon temperature, the powder oxidation and combustion caused by too high argon temperature and the powder agglomeration caused by too low argon temperature are avoided, and the powder obtained by screening has good fluidity and low oxygen content; at the same time, the operation is simple, only one feeding is required, and the contact between the existing screening device and the air during each process transfer is avoided, which reduces the oxygen content in the powder, improves the purity of the alloy powder, and improves the efficiency of post-screening processing. It is very suitable for industrial continuous production, with small dust emissions and basically no leakage, and little harm to humans and the environment. Compared with the existing traditional methods, it has great advantages.
  • FIG1 is a schematic structural diagram of a device for preparing a 3D printing titanium alloy powder with fluidity according to an embodiment of the present invention
  • FIG2 is a first diagram of particle size distribution of titanium alloy powder in an embodiment of the present invention.
  • FIG3 is a second particle size distribution diagram of the titanium alloy powder in an embodiment of the present invention.
  • 1-feeding bin 2-screw feeder, 3-first-stage turbine classifier, 4-first-stage powder collecting tank group, 5-second-stage turbine classifier, 6-second-stage powder collecting tank group, 7-oxygen content sensor, 8-dust collector, 9-induced draft fan, 10-cold dryer, 11-differential distribution, 12-cumulative distribution.
  • this embodiment provides a preparation device for 3D printing titanium alloy powder with fluidity, comprising: a feeding bin 1, a screw feeder 2, a first-level turbine classifier 3, a first-level powder collecting tank group 4, a second-level turbine classifier 5, a second-level powder collecting tank group 6, an oxygen content sensor 7, a dust collector 8, an induced draft fan 9 and a cold dryer 10;
  • the feeding bin 1 is connected to the screw feeder 2
  • the screw feeder 2 is connected to the first-level turbine classifier 3
  • the upper part of the first-level turbine classifier 3 is connected to the second-level turbine classifier 5, and the first-level turbine classifier
  • the lower part of the machine 3 is connected to the first-level powder collecting tank group 4, the upper part of the second-level turbine classifier 5 is connected to the dust collector 8, the lower part of the second-level turbine classifier 5 is connected to the second-level powder collecting tank group 6,
  • the dust collector 8 is connected to the induced draft fan 9, and the induced draft fan 9 is connected to the screw feeder 2;
  • the screw feeder 2 is connected to the first-stage turbine classifier 3 via an inclined feeding pipe.
  • the cross-sectional sealing gap of the first-stage turbine classifier 3 is 5 mm, and the blade inclination angle of the first-stage classifying wheel of the first-stage turbine classifier 3 is 25°-30°.
  • the cross-sectional sealing gap of the two-stage turbine classifier is 2.5 mm, and the blade inclination angle of the two-stage classifier wheel of the two-stage turbine classifier 5 is 15°-20°.
  • a temperature sensor is provided on the pipe connecting the primary turbine classifier 3 and the secondary turbine classifier 5.
  • the temperature sensor can provide a reference for the refrigeration temperature of the cold dryer 10, which has the advantage of saving energy.
  • This embodiment provides a method for preparing a 3D printing titanium alloy powder with fluidity, including the preparation device described above, and the preparation method includes the following steps:
  • the inert gas is high-purity argon gas with a purity greater than 99.99%.
  • the inert gas inflation pressure is 0.2-0.3Mpa.
  • the exhaust air pressure of the induced draft fan 9 is 0.25-0.35 MPa
  • the air inlet speed is 8-10 m/s
  • the air volume is 1200-1500 m 3 /h.
  • the preset value is 120-150 ppm.
  • the classification frequency of the first-stage classification wheel is 8-10 Hz
  • the classification frequency of the second-stage classification wheel is 16-18 Hz.
  • Example 1 The device of Example 1 and the method of Example 2 are included, the powder collecting tank of titanium alloy powder prepared by aerosolization is connected to the feeding bin 1, the air in the preparation device is replaced with argon, the lower butterfly valve of the powder collecting tank is opened, the powder enters the feeding bin 1, and the valve of the feeding bin 1 is closed.
  • the pressure of the argon is 0.2Mpa
  • the outlet pressure of the induced draft fan 9 is set to 0.3Mpa
  • the air inlet speed is 10m/s
  • the air volume is 1400m3 /h
  • the exhaust and air supply stop is set to the oxygen content of 150ppm, that is, when the oxygen content is higher than 150ppm, argon is passed into the preparation device, and when the oxygen content is lower than 150ppm, argon is stopped from passing into the preparation device.
  • this cooling temperature is the cooling temperature set under the process conditions of this embodiment.
  • Turn on the first-stage turbine classifier wheel, and the classifying frequency of the first-stage turbine classifier 3 is 10Hz.
  • Turn on the second-stage turbine classifier wheel, and the classifying frequency of the second-stage turbine classifier 5 is 18Hz.
  • the feeding speed of the screw feeder 2 is 60kg/h, and start the classification of the powder
  • powder is collected by the secondary powder collecting tank group 6 to obtain titanium alloy powder.
  • the particle size D10 of the obtained titanium alloy powder is 21.51 ⁇ m, D50 is 35.77 ⁇ m, and D90 is 56.12 ⁇ m; as shown in Figure 2, the differential distribution 11 and the cumulative distribution 12 are respectively shown in the figure.
  • the fluidity of the titanium alloy powder is 28 s/50 g, and the oxygen content is 720 ppm, which meets the requirements of laser 3D printing for 15-53 ⁇ m powder.
  • Example 1 The device of Example 1 and the method of Example 2 are included, the powder collecting tank of titanium alloy powder prepared by atomization is connected to the feeding bin 1, the air in the preparation device is replaced with argon, the lower butterfly valve of the powder collecting tank is opened, the powder enters the feeding bin 1, and the valve of the feeding bin 1 is closed.
  • the pressure of the argon is 0.3Mpa
  • the outlet pressure of the induced draft fan 9 is set to 0.35Mpa
  • the air inlet speed is 8m/s
  • the air volume is 1200m3 /h
  • the exhaust and air supply stop is set to the oxygen content of 120ppm, that is, when the oxygen content is higher than 120ppm, argon is passed into the preparation device, and when the oxygen content is lower than 120ppm, argon is stopped from passing into the preparation device.
  • this cooling temperature is the cooling temperature set under the process conditions of this embodiment.
  • Turn on the first-stage turbine classifier wheel, and the classifying frequency of the first-stage turbine classifier 3 is 9Hz.
  • Turn on the second-stage turbine classifier wheel, and the classifying frequency of the second-stage turbine classifier 5 is 16Hz.
  • the feeding speed of the screw feeder 2 is 70 kg/h, and start the classification of the powder
  • powder is collected by the secondary powder collecting tank group 6 to obtain titanium alloy powder.
  • the particle size D10 of the obtained titanium alloy powder is 16.14 ⁇ m, D50 is 32.51 ⁇ m, and D90 is 46.43 ⁇ m; as shown in Figure 3, the differential distribution 11 and the cumulative distribution 12 are respectively shown in the figure.
  • the fluidity of the titanium alloy powder is 34 s/50 g, and the oxygen content is 762 ppm, which meets the requirements of laser 3D printing for 15-45 ⁇ m powder.

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Abstract

A preparation device and method for 3D printing titanium alloy powder with fluidity. In the preparation device, a feeding bin (1) is connected to a screw feeder (2) the screw feeder (2) is connected to a first-stage turbine classifier (3), an upper part of the first-stage turbine classifier (3) is connected to a second-stage turbine classifier (5), a lower part of the first-stage turbine classifier (3) is connected to a first-stage powder-collecting tank group (4), an upper part of the second-stage turbine classifier (5) is connected to a dust collector (8), a lower part of the second-stage turbine classifier (5) is connected to a second-stage powder-collecting tank group (6), and the dust collector (8) is connected to an induced draft fan (9), and the induced draft fan (9) is connected to the screw feeder (2); an oxygen content sensor (7) is provided between the second-stage turbine classifier (5) and the dust collector (8); and a refrigeration dryer (10) is configured to cool air at an outlet of the induced draft fan (9).

Description

一种具有流动性的3D打印钛合金粉末的制备装置及方法A preparation device and method for 3D printing titanium alloy powder with fluidity 技术领域Technical Field
本发明属于气雾化制粉和粉末筛分领域，具体涉及一种具有流动性的3D打印钛合金粉末的制备装置及方法。The invention belongs to the field of aerosol powder making and powder screening, and specifically relates to a device and method for preparing fluid 3D printing titanium alloy powder.
背景技术Background technique
3D打印技术具有精度高、周期短、省材料、能制备复杂一体成型零件等优点，目前已经成为国内外最新关注的研究重点。对于金属激光3D打印，金属粉末是实现快速成型打印件的物质基础，金属粉末的形貌、流动性、氧含量、松装密度、粒径直接决定了3D打印件的最终性能。金属激光3D打印分为铺粉式打印和送粉式打印，目前的主流方式为铺粉式打印，铺粉打印需要金属粉末具有良好的流动性，粉末的流动性越好，铺粉越均匀，流动性好的粉末不仅可以提高3D打印制品的尺寸精度和表面质量，还可以提高成型件组织的均匀性和致密度，可缩短加工时间。3D printing technology has the advantages of high precision, short cycle, material saving, and the ability to prepare complex one-piece parts. It has become the latest research focus at home and abroad. For metal laser 3D printing, metal powder is the material basis for rapid prototyping of printed parts. The morphology, fluidity, oxygen content, bulk density, and particle size of metal powder directly determine the final performance of 3D printed parts. Metal laser 3D printing is divided into powder spreading printing and powder feeding printing. The current mainstream method is powder spreading printing. Powder spreading printing requires metal powder to have good fluidity. The better the fluidity of the powder, the more uniform the powder spreading. Powder with good fluidity can not only improve the dimensional accuracy and surface quality of 3D printed products, but also improve the uniformity and density of the molded parts, which can shorten the processing time.
打印粉末的制备一般采用气雾化制备，气雾化的基本原理是利用高速气流将液态金属冲刷破碎成小液滴后凝固成粉末，该方法制备的粉末一般为正态分布，粒度分布区间为0～300μm，在雾化过程中不可避免会产生粒度为-15μm的超细粉末，而超细粉末会吸附在其他粉末的表面，影响粉末的流动性，同时粉末在转移、筛分、封装、保存过程中不可避免会与空气接触，空气中的水分会使粉末表面潮湿，影响粉末的流动性，粉末的流动性不佳会影响铺粉的厚度和铺粉的均匀性；同时空气中的氧会使粉末表面被氧化，增加粉末的氧含量。上述问题会导致打印过程中粉末烧结不完全、结合强度低，所得的打印件性能不达标。Printing powder is generally prepared by atomization. The basic principle of atomization is to use high-speed airflow to scour liquid metal into small droplets and then solidify them into powder. The powder prepared by this method is generally normally distributed, with a particle size distribution range of 0 to 300 μm. In the atomization process, ultrafine powder with a particle size of -15 μm will inevitably be produced, and the ultrafine powder will be adsorbed on the surface of other powders, affecting the fluidity of the powder. At the same time, the powder will inevitably come into contact with the air during the transfer, screening, packaging, and storage process. The moisture in the air will make the powder surface moist, affecting the fluidity of the powder. Poor powder fluidity will affect the thickness and uniformity of the powder. At the same time, the oxygen in the air will oxidize the powder surface and increase the oxygen content of the powder. The above problems will lead to incomplete sintering of the powder and low bonding strength during the printing process, and the performance of the resulting prints will not meet the standards.
对比，中国专利：CN110420854A，3D打印粉末的筛分方法，利用气流分级机对气雾化制备的通粉进行筛分，除去粒度为-15μm的超细粉末，得到粒度在15～250μm区间段的粉末；利用手套箱对上述粒度在15～250μm区间段的粉末进行超声波筛分，得到粒度在15～45μm区间段的打印粉末；对粒度在15～45μm区间段的打印粉末进行封装。本发明通过对气雾化制备的通粉进行连续筛分，依次将通粉中的超细粉末、大粒度粉末去除；通过控制气流分级机风轮的转速和进气量、超声波震动筛分机的超声波频率和筛分时间，有效降低了超细粉末的数量，并通过对手套箱的水含量、氧含量等参数进行控制，有效降低了打印粉末的湿度和增氧量，通过充气包装避免真空包装使得粉末结块、粘连，影响粉末的流动性。In contrast, Chinese patent: CN110420854A, a method for screening 3D printing powder, uses an airflow classifier to screen the aerosolized powder, removes the ultrafine powder with a particle size of -15μm, and obtains a powder with a particle size in the range of 15 to 250μm; uses a glove box to ultrasonically screen the powder with a particle size in the range of 15 to 250μm, and obtains a printing powder with a particle size in the range of 15 to 45μm; and encapsulates the printing powder with a particle size in the range of 15 to 45μm. The present invention continuously screens the aerosolized powder, and removes the ultrafine powder and large-particle powder in the powder in turn; by controlling the speed and air intake of the airflow classifier wind wheel, the ultrasonic frequency and screening time of the ultrasonic vibration screening machine, the amount of ultrafine powder is effectively reduced, and by controlling the water content, oxygen content and other parameters of the glove box, the humidity and oxygen increase of the printing powder are effectively reduced, and the vacuum packaging is prevented by the inflatable packaging to prevent the powder from agglomerating and sticking, which affects the fluidity of the powder.
该专利虽然控制了水、氧含量，但是粉末所赐转移，过程繁琐，而且手套箱内进行超声波筛分对手套箱使用寿命有影响，不适合规模化筛分生产。Although this patent controls the water and oxygen content, the powder transfer process is cumbersome, and ultrasonic screening in the glove box affects the service life of the glove box, which is not suitable for large-scale screening production.
有鉴于此，特提出本发明。In view of this, the present invention is proposed.
发明内容Summary of the invention
为了解决现有技术中存在的技术问题，本发明第一方面提供了一种提高3D打印钛合金粉末流动性的装置，本发明的装置过程简单，具有筛分效率高、氧含量低的优点，使制得的钛合金粉末流动性好。In order to solve the technical problems existing in the prior art, the first aspect of the present invention provides a device for improving the fluidity of 3D printed titanium alloy powder. The device process of the present invention is simple and has the advantages of high screening efficiency and low oxygen content, so that the prepared titanium alloy powder has good fluidity.
本发明的制备装置包括下述技术方案：The preparation device of the present invention comprises the following technical solutions:
一种具有流动性的3D打印钛合金粉末的制备装置，包括：加料仓、螺旋加料机、一级涡轮分级机、一级收粉罐组、二级涡轮分级机、二级收粉罐组、氧含量传感器、除尘器、引风机和冷干机；所述加料仓连接所述螺旋加料机，所述螺旋加料机连接所述一级涡轮分级机，所述一级涡轮分级机的上部连接所述二级涡轮分级机，所述一级涡轮分级机的下部连接所述一级收粉罐组，所述二级涡轮分级机的上部连接所述除尘器，所述二级涡轮分级机的下部连接所述二级收粉罐组所述除尘器连接所述引风机，所述引风机连接所述螺旋加料机；所述氧含量传感器设置在二级涡轮分级机与所述除尘器之间；所述冷干机用于冷却所述引风机出口的气体。A preparation device for 3D printing titanium alloy powder with fluidity, comprising: a feeding bin, a spiral feeder, a first-level turbine classifier, a first-level powder collecting tank group, a second-level turbine classifier, a second-level powder collecting tank group, an oxygen content sensor, a dust collector, an induced draft fan and a cold dryer; the feeding bin is connected to the spiral feeder, the spiral feeder is connected to the first-level turbine classifier, the upper part of the first-level turbine classifier is connected to the second-level turbine classifier, the lower part of the first-level turbine classifier is connected to the first-level powder collecting tank group, the upper part of the second-level turbine classifier is connected to the dust collector, the lower part of the second-level turbine classifier is connected to the second-level powder collecting tank group, the dust collector is connected to the induced draft fan, and the induced draft fan is connected to the spiral feeder; the oxygen content sensor is arranged between the second-level turbine classifier and the dust collector; the cold dryer is used to cool the gas at the outlet of the induced draft fan.
优选的，所述螺旋加料机通过倾斜的送料管道连接所述一级涡轮分级机。Preferably, the screw feeder is connected to the first-stage turbine classifier via an inclined feeding pipe.
优选的，所述一级涡轮分级机的断面密封间隙为5mm，所述一级涡轮分级机的一级分级轮的叶片倾斜角度为25°-30°。Preferably, the cross-sectional sealing gap of the first-stage turbine classifier is 5 mm, and the blade inclination angle of the first-stage classifying wheel of the first-stage turbine classifier is 25°-30°.
优选的，所述二级涡轮分级的断面密封间隙为2.5mm，所述二级涡轮分级机的二级分级轮的叶片倾斜角度为15°-20°。Preferably, the cross-sectional sealing gap of the two-stage turbine classifier is 2.5 mm, and the blade inclination angle of the two-stage classifier wheel of the two-stage turbine classifier is 15°-20°.
本发明第二方面提供了一种具有流动性的3D打印钛合金粉末的制备方法，本发明是一种高效、低成本、安全的粉末筛分及后处理方法。The second aspect of the present invention provides a method for preparing 3D printing titanium alloy powder with fluidity. The present invention is an efficient, low-cost and safe powder screening and post-processing method.
本发明的制备方法包括下述技术方案：The preparation method of the present invention comprises the following technical scheme:
一种具有流动性的3D打印钛合金粉末的制备方法，包括上述所述的制备装置，所述制备方法包括如下步骤：A method for preparing a 3D printing titanium alloy powder with fluidity, comprising the preparation device described above, the preparation method comprising the following steps:
S100：用惰性气体置制备装置内部的气体，将收粉罐固定在所述加料仓上；S100: using inert gas to displace the gas inside the preparation device, and fixing the powder collecting tank on the feeding bin;
S200：当所述制备装置内部氧含量降低到预设值以下，停止向制备装置内通惰性气体；通过雾化制粉收粉罐向所述加料仓加料；S200: When the oxygen content inside the preparation device drops below a preset value, the inert gas is stopped from being supplied to the preparation device; and the feeding bin is fed with materials through an atomizing powder collecting tank;
S300：打开冷干机，打开一级涡轮分级机的一级分级轮，打开二级涡轮分级机的二级分级轮，打开螺旋加料机；S300: Turn on the cold dryer, turn on the first-stage classifying wheel of the first-stage turbine classifier, turn on the second-stage classifying wheel of the second-stage turbine classifier, and turn on the screw feeder;
S400：通过二级收粉罐获得印钛合金粉末。S400: Get the titanium alloy powder through the secondary powder collecting tank.
优选的，所述惰性气体为纯度大于99.99％的高纯氩气。Preferably, the inert gas is high-purity argon gas with a purity greater than 99.99%.
优选的，所述惰性气体充气压力为0.2-0.3Mpa。Preferably, the inert gas inflation pressure is 0.2-0.3Mpa.
优选的，所述引风机出气压力为0.25-0.35Mpa，进风速度为8-10m/s，风量1200-1500m3/h。Preferably, the exhaust pressure of the induced draft fan is 0.25-0.35 MPa, the air inlet speed is 8-10 m/s, and the air volume is 1200-1500 m 3 /h.
优选的，所述预设值为120-150ppm。Preferably, the preset value is 120-150 ppm.
优选的，所述一级分级轮的分级频率为8-10Hz，所述二级分级轮的分级频率为16-18Hz。Preferably, the classification frequency of the first-stage classification wheel is 8-10 Hz, and the classification frequency of the second-stage classification wheel is 16-18 Hz.
采用上述技术方案，本发明包括如下优点：By adopting the above technical solution, the present invention has the following advantages:
1、本发明的装置过程简单，具有筛分效率高、氧含量低的优点，使制得的钛合金粉末流动性好。1. The device process of the present invention is simple, and has the advantages of high screening efficiency and low oxygen content, so that the prepared titanium alloy powder has good fluidity.
2、本发明是一种高效、低成本、安全的粉末筛分及后处理方法。2. The present invention is an efficient, low-cost and safe powder screening and post-processing method.
3、本发明的方法通过控制引风机的风量、流速，一级分级轮和二级分级轮的参数及频率，实现高效分离；通过控制适宜的氩气温度，避免氩气温度过高粉末氧化、燃烧，氩气温度过低粉末团聚的问题，筛分得到的粉末流动性好，氧含量低；同时操作简单，只需要一次加料，避免现有筛分装置在每道次工序转移中和空气的接触，降低了粉末中的氧含量，改善了合金粉末纯度，提高了筛分后处理效率，非常适合工业化连续生产，粉尘排放量小，基本无外泄，对人和环境的危害很小，与现有传统方法相比具有非常大的优势。3. The method of the present invention achieves efficient separation by controlling the air volume and flow rate of the induced draft fan, and the parameters and frequency of the primary and secondary classifying wheels; by controlling the appropriate argon temperature, the powder oxidation and combustion caused by too high argon temperature and the powder agglomeration caused by too low argon temperature are avoided, and the powder obtained by screening has good fluidity and low oxygen content; at the same time, the operation is simple, only one feeding is required, and the contact between the existing screening device and the air during each process transfer is avoided, which reduces the oxygen content in the powder, improves the purity of the alloy powder, and improves the efficiency of post-screening processing. It is very suitable for industrial continuous production, with small dust emissions and basically no leakage, and little harm to humans and the environment. Compared with the existing traditional methods, it has great advantages.
本发明的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本发明而了解。本发明的目的和其他优点可通过在说明书、权利要求书以及附图中所指出的结构来实现和获得。Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
图1为本发明实施例中一种具有流动性的3D打印钛合金粉末的制备装置的结构示意图；FIG1 is a schematic structural diagram of a device for preparing a 3D printing titanium alloy powder with fluidity according to an embodiment of the present invention;
图2为本发明实施例中钛合金粉末的粒度分布图一；FIG2 is a first diagram of particle size distribution of titanium alloy powder in an embodiment of the present invention;
图3为本发明实施例中钛合金粉末的粒度分布图二；FIG3 is a second particle size distribution diagram of the titanium alloy powder in an embodiment of the present invention;
附图中：1-加料仓，2-螺旋加料机，3-一级涡轮分级机，4-一级收粉罐组，5-二级涡轮分级机，6-二级收粉罐组，7-氧含量传感器，8-除尘器，9-引风机，10-冷干机，11-微分分布，12-累计分布。In the attached figure: 1-feeding bin, 2-screw feeder, 3-first-stage turbine classifier, 4-first-stage powder collecting tank group, 5-second-stage turbine classifier, 6-second-stage powder collecting tank group, 7-oxygen content sensor, 8-dust collector, 9-induced draft fan, 10-cold dryer, 11-differential distribution, 12-cumulative distribution.
具体实施方式Detailed ways
下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，旨在用于解释本发明，而不能理解为对本发明的限制。Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.
在本发明的描述中，需要说明的是，当元件被称为“固定”或“设置”另一个元件，它可以直接在另一个元件上或者间接在该另一个元件上。当一个元件被称为是“连接于”另一个元件，它可以是直接连接到另一个元件或间接连接至该另一个元件上。In the description of the present invention, it should be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
此外，术语“一”、“二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“一”、“二”的特征可以明示或者隐含地包括一个或者更多个该特征。In addition, the terms "one" and "two" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "one" or "two" may explicitly or implicitly include one or more of the feature.
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地说明，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
实施例1Example 1
如图1所示，本实施例提供了一种具有流动性的3D打印钛合金粉末的制备装置，包括：加料仓1、螺旋加料机2、一级涡轮分级机3、一级收粉罐组4、二级涡轮分级机5、二级收粉罐组6、氧含量传感器7、除尘器8、引风机9和冷干机10；所述加料仓1连接所述螺旋加料机2，所述螺旋加料机2连接所述一级涡轮分级机3，所述一级涡轮分级机3的上部连接所述二级涡轮分级机5，所述一级涡轮分级机3的下部连接所述一级收粉罐组4，所述二级涡轮分级机5的上部连接所述除尘器8，所述二级涡轮分级机5的下部连接所述二级收粉罐组6所述除尘器8连接所述引风机9，所述引风机9连接所述螺旋加料机2；所述氧含量传感器7设置在二级涡轮分级机5与所述除尘器8之间，具体的，氧含量传感器7设置在二级涡轮分级机5与除尘器8连接的管道上；所述冷干机10用于冷却所述引风机9出口的气体。As shown in FIG1 , this embodiment provides a preparation device for 3D printing titanium alloy powder with fluidity, comprising: a feeding bin 1, a screw feeder 2, a first-level turbine classifier 3, a first-level powder collecting tank group 4, a second-level turbine classifier 5, a second-level powder collecting tank group 6, an oxygen content sensor 7, a dust collector 8, an induced draft fan 9 and a cold dryer 10; the feeding bin 1 is connected to the screw feeder 2, the screw feeder 2 is connected to the first-level turbine classifier 3, the upper part of the first-level turbine classifier 3 is connected to the second-level turbine classifier 5, and the first-level turbine classifier The lower part of the machine 3 is connected to the first-level powder collecting tank group 4, the upper part of the second-level turbine classifier 5 is connected to the dust collector 8, the lower part of the second-level turbine classifier 5 is connected to the second-level powder collecting tank group 6, the dust collector 8 is connected to the induced draft fan 9, and the induced draft fan 9 is connected to the screw feeder 2; the oxygen content sensor 7 is arranged between the second-level turbine classifier 5 and the dust collector 8, specifically, the oxygen content sensor 7 is arranged on the pipeline connecting the second-level turbine classifier 5 and the dust collector 8; the cold dryer 10 is used to cool the gas at the outlet of the induced draft fan 9.
优选的，所述螺旋加料机2通过倾斜的送料管道连接所述一级涡轮分级机3。Preferably, the screw feeder 2 is connected to the first-stage turbine classifier 3 via an inclined feeding pipe.
优选的，所述一级涡轮分级机3的断面密封间隙为5mm，所述一级涡轮分级机3的一级分级轮的叶片倾斜角度为25°-30°。Preferably, the cross-sectional sealing gap of the first-stage turbine classifier 3 is 5 mm, and the blade inclination angle of the first-stage classifying wheel of the first-stage turbine classifier 3 is 25°-30°.
优选的，所述二级涡轮分级的断面密封间隙为2.5mm，所述二级涡轮分级机5的二级分级轮的叶片倾斜角度为15°-20°。Preferably, the cross-sectional sealing gap of the two-stage turbine classifier is 2.5 mm, and the blade inclination angle of the two-stage classifier wheel of the two-stage turbine classifier 5 is 15°-20°.
优选的，所述一级涡轮分级机3与二级涡轮分级机5连接的管道上设置有温度传感器。通过该温度传感器可以给冷干机10的制冷温度提供参考，具有节约能源的优点。Preferably, a temperature sensor is provided on the pipe connecting the primary turbine classifier 3 and the secondary turbine classifier 5. The temperature sensor can provide a reference for the refrigeration temperature of the cold dryer 10, which has the advantage of saving energy.
实施例2Example 2
本实施例提供了一种具有流动性的3D打印钛合金粉末的制备方法，包括上述所述的制备装置，所述制备方法包括如下步骤：This embodiment provides a method for preparing a 3D printing titanium alloy powder with fluidity, including the preparation device described above, and the preparation method includes the following steps:
S100：用惰性气体置制备装置内部的气体，将收粉罐固定在所述加料仓1上；S100: using inert gas to displace the gas inside the preparation device, and fixing the powder collecting tank on the feeding bin 1;
S200：当所述制备装置内部氧含量降低到预设值以下，停止向制备装置内通惰性气体；通过雾化制粉收粉罐向所述加料仓1加料；S200: When the oxygen content inside the preparation device drops below a preset value, the inert gas is stopped from being introduced into the preparation device; and the feeding bin 1 is fed with materials through an atomizing powder collecting tank;
S300：打开冷干机10，打开一级涡轮分级机3的一级分级轮，打开二级涡轮分级机5的二级分级轮，打开螺旋加料机2；S300: Turn on the cold dryer 10, turn on the primary classifying wheel of the primary turbine classifier 3, turn on the secondary classifying wheel of the secondary turbine classifier 5, and turn on the screw feeder 2;
S400：通过二级收粉罐获得印钛合金粉末。S400: Get the titanium alloy powder through the secondary powder collecting tank.
优选的，所述惰性气体为纯度大于99.99％的高纯氩气。Preferably, the inert gas is high-purity argon gas with a purity greater than 99.99%.
优选的，所述惰性气体充气压力为0.2-0.3Mpa。Preferably, the inert gas inflation pressure is 0.2-0.3Mpa.
优选的，所述引风机9出气压力为0.25-0.35Mpa，进风速度为8-10m/s，风量1200-1500m3/h。Preferably, the exhaust air pressure of the induced draft fan 9 is 0.25-0.35 MPa, the air inlet speed is 8-10 m/s, and the air volume is 1200-1500 m 3 /h.
优选的，所述预设值为120-150ppm。Preferably, the preset value is 120-150 ppm.
优选的，所述一级分级轮的分级频率为8-10Hz，所述二级分级轮的分级频率为16-18Hz。Preferably, the classification frequency of the first-stage classification wheel is 8-10 Hz, and the classification frequency of the second-stage classification wheel is 16-18 Hz.
实施例3Example 3
包括实施例1的装置和实施例2的方法，将气雾化制备的钛合金粉末收粉罐与加料仓1连接，用氩气置换加制备装置内的空气，将收粉罐粉末下蝶阀打开，粉末进入加料仓1，关闭加料仓1阀门。其中氩气的压力为0.2Mpa，将引风机9出气压力设置为为0.3Mpa，进风速度为10m/s，风量1400m3/h，排气补气停止设置为氧含量150ppm，即氧含量高于150ppm向制备装置内通氩气，氧含量低于150ppm停止向制备装置内通氩气。The device of Example 1 and the method of Example 2 are included, the powder collecting tank of titanium alloy powder prepared by aerosolization is connected to the feeding bin 1, the air in the preparation device is replaced with argon, the lower butterfly valve of the powder collecting tank is opened, the powder enters the feeding bin 1, and the valve of the feeding bin 1 is closed. The pressure of the argon is 0.2Mpa, the outlet pressure of the induced draft fan 9 is set to 0.3Mpa, the air inlet speed is 10m/s, the air volume is 1400m3 /h, and the exhaust and air supply stop is set to the oxygen content of 150ppm, that is, when the oxygen content is higher than 150ppm, argon is passed into the preparation device, and when the oxygen content is lower than 150ppm, argon is stopped from passing into the preparation device.
当设备内部氧含量降低到150ppm以下，停止向制备设备通入氩气，打开冷干机10，将冷却温度设置为56℃，需要说明的是，该冷却温度是属于本实施例的工艺条件下设置的冷却温度，打开一级涡轮分级轮，一级涡轮分级机3的一级分级轮的分级频率为10Hz，打开二级涡轮分级轮，二级涡轮分级机5的分级频率为18Hz。When the oxygen content inside the equipment drops below 150ppm, stop supplying argon to the preparation equipment, turn on the cold dryer 10, and set the cooling temperature to 56°C. It should be noted that this cooling temperature is the cooling temperature set under the process conditions of this embodiment. Turn on the first-stage turbine classifier wheel, and the classifying frequency of the first-stage turbine classifier 3 is 10Hz. Turn on the second-stage turbine classifier wheel, and the classifying frequency of the second-stage turbine classifier 5 is 18Hz.
打开螺旋加料机2，螺旋加料机2加料速度60kg/h，开始粉末的分级；Turn on the screw feeder 2, the feeding speed of the screw feeder 2 is 60kg/h, and start the classification of the powder;
设备运行过程中，通过二级收粉罐组6收粉，得到钛合金粉末。During the operation of the equipment, powder is collected by the secondary powder collecting tank group 6 to obtain titanium alloy powder.
得到的钛合金粉末的粒度D10为21.51μm，D50为35.77μm，D90为56.12μm；如图2所示，图中分别示出了微分分布11和累计分布12，钛合金粉末流动性为28s/50g，氧含量为720ppm，满足激光3D打印对15-53μm粉末的要求。The particle size D10 of the obtained titanium alloy powder is 21.51 μm, D50 is 35.77 μm, and D90 is 56.12 μm; as shown in Figure 2, the differential distribution 11 and the cumulative distribution 12 are respectively shown in the figure. The fluidity of the titanium alloy powder is 28 s/50 g, and the oxygen content is 720 ppm, which meets the requirements of laser 3D printing for 15-53 μm powder.
实施例4Example 4
包括实施例1的装置和实施例2的方法，将气雾化制备的钛合金粉末收粉罐与加料仓1连接，用氩气置换加制备装置内的空气，将收粉罐粉末下蝶阀打开，粉末进入加料仓1，关闭加料仓1阀门。其中氩气的压力为0.3Mpa，将引风机9出气压力设置为为0.35Mpa，进风速度为8m/s，风量1200m3/h，排气补气停止设置为氧含量120ppm，即氧含量高于120ppm向制备装置内通氩气，氧含量低于120ppm停止向制备装置内通氩气。The device of Example 1 and the method of Example 2 are included, the powder collecting tank of titanium alloy powder prepared by atomization is connected to the feeding bin 1, the air in the preparation device is replaced with argon, the lower butterfly valve of the powder collecting tank is opened, the powder enters the feeding bin 1, and the valve of the feeding bin 1 is closed. The pressure of the argon is 0.3Mpa, the outlet pressure of the induced draft fan 9 is set to 0.35Mpa, the air inlet speed is 8m/s, the air volume is 1200m3 /h, and the exhaust and air supply stop is set to the oxygen content of 120ppm, that is, when the oxygen content is higher than 120ppm, argon is passed into the preparation device, and when the oxygen content is lower than 120ppm, argon is stopped from passing into the preparation device.
当设备内部氧含量降低到120ppm以下，停止向制备设备通入氩气，打开冷干机10，将冷却温度设置为50℃，需要说明的是，该冷却温度是属于本实施例的工艺条件下设置的冷却温度，打开一级涡轮分级轮，一级涡轮分级机3的一级分级轮的分级频率为9Hz，打开二级涡轮分级轮，二级涡轮分级机5的分级频率为16Hz。When the oxygen content inside the equipment drops below 120ppm, stop supplying argon to the preparation equipment, turn on the cold dryer 10, and set the cooling temperature to 50°C. It should be noted that this cooling temperature is the cooling temperature set under the process conditions of this embodiment. Turn on the first-stage turbine classifier wheel, and the classifying frequency of the first-stage turbine classifier 3 is 9Hz. Turn on the second-stage turbine classifier wheel, and the classifying frequency of the second-stage turbine classifier 5 is 16Hz.
打开螺旋加料机2，螺旋加料机2加料速度70kg/h，开始粉末的分级；Turn on the screw feeder 2, the feeding speed of the screw feeder 2 is 70 kg/h, and start the classification of the powder;
设备运行过程中，通过二级收粉罐组6收粉，得到钛合金粉末。During the operation of the equipment, powder is collected by the secondary powder collecting tank group 6 to obtain titanium alloy powder.
得到的钛合金粉末的粒度D10为16.14μm，D50为32.51μm，D90为46.43μm；如图3所示，图中分别示出了微分分布11和累计分布12，钛合金粉末流动性为34s/50g，氧含量为762ppm，满足激光3D打印对15-45μm粉末的要求。The particle size D10 of the obtained titanium alloy powder is 16.14 μm, D50 is 32.51 μm, and D90 is 46.43 μm; as shown in Figure 3, the differential distribution 11 and the cumulative distribution 12 are respectively shown in the figure. The fluidity of the titanium alloy powder is 34 s/50 g, and the oxygen content is 762 ppm, which meets the requirements of laser 3D printing for 15-45 μm powder.
上述实施例，只是本发明的较佳实施例，并非用来限制本发明实施范围，故凡以本发明权利要求所述内容所做的等效变化，均应包括在本发明权利要求范围之内。The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all equivalent changes made to the contents described in the claims of the present invention should be included in the scope of the claims of the present invention.
尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

  1. 一种具有流动性的3D打印钛合金粉末的制备装置，其特征在于，包括：加料仓、螺旋加料机、一级涡轮分级机、一级收粉罐组、二级涡轮分级机、二级收粉罐组、氧含量传感器、除尘器、引风机和冷干机；A preparation device for 3D printing titanium alloy powder with fluidity, characterized in that it comprises: a feeding bin, a screw feeder, a first-level turbine classifier, a first-level powder collecting tank group, a second-level turbine classifier, a second-level powder collecting tank group, an oxygen content sensor, a dust collector, an induced draft fan and a cold dryer;
    所述加料仓连接所述螺旋加料机，所述螺旋加料机连接所述一级涡轮分级机，所述一级涡轮分级机的上部连接所述二级涡轮分级机，所述一级涡轮分级机的下部连接所述一级收粉罐组，所述二级涡轮分级机的上部连接所述除尘器，所述二级涡轮分级机的下部连接所述二级收粉罐组所述除尘器连接所述引风机，所述引风机连接所述螺旋加料机；The feeding bin is connected to the screw feeder, the screw feeder is connected to the first-level turbine classifier, the upper part of the first-level turbine classifier is connected to the second-level turbine classifier, the lower part of the first-level turbine classifier is connected to the first-level powder collecting tank group, the upper part of the second-level turbine classifier is connected to the dust collector, the lower part of the second-level turbine classifier is connected to the second-level powder collecting tank group, the dust collector is connected to the induced draft fan, and the induced draft fan is connected to the screw feeder;
    所述氧含量传感器设置在二级涡轮分级机与所述除尘器之间；The oxygen content sensor is arranged between the secondary turbine classifier and the dust collector;
    所述冷干机用于冷却所述引风机出口的气体。The cold dryer is used to cool the gas at the outlet of the induced draft fan.
  2. 如权利要求1所述的一种具有流动性的3D打印钛合金粉末的制备装置，其特征在于，所述螺旋加料机通过倾斜的送料管道连接所述一级涡轮分级机。The device for preparing a fluid 3D printing titanium alloy powder as described in claim 1 is characterized in that the screw feeder is connected to the primary turbine classifier through an inclined feeding pipe.
  3. 如权利要求1所述的一种具有流动性的3D打印钛合金粉末的制备装置，其特征在于，所述一级涡轮分级机的断面密封间隙为5mm，所述一级涡轮分级机的一级分级轮的叶片倾斜角度为25°-30°。A device for preparing a fluid 3D printed titanium alloy powder as described in claim 1, characterized in that the cross-sectional sealing gap of the first-stage turbine classifier is 5 mm, and the blade inclination angle of the first-stage classifying wheel of the first-stage turbine classifier is 25°-30°.
  4. 如权利要求1所述的一种具有流动性的3D打印钛合金粉末的制备装置，其特征在于，所述二级涡轮分级的断面密封间隙为2.5mm，所述二级涡轮分级机的二级分级轮的叶片倾斜角度为15°-20°。A device for preparing a fluid 3D printed titanium alloy powder as described in claim 1, characterized in that the cross-sectional sealing gap of the secondary turbine classifier is 2.5 mm, and the blade inclination angle of the secondary classifying wheel of the secondary turbine classifier is 15°-20°.
  5. 一种具有流动性的3D打印钛合金粉末的制备方法，其特征在于，包括权利要去1-4任意一项所述的制备装置，所述制备方法包括如下步骤：A method for preparing a 3D printing titanium alloy powder with fluidity, characterized in that it comprises a preparation device according to any one of claims 1 to 4, and the preparation method comprises the following steps:
    S100：用惰性气体置制备装置内部的气体，将收粉罐固定在所述加料仓上；S100: using inert gas to displace the gas inside the preparation device, and fixing the powder collecting tank on the feeding bin;
    S200：当所述制备装置内部氧含量降低到预设值以下，停止向制备装置内通惰性气体；通过雾化制粉收粉罐向所述加料仓加料； S200: When the oxygen content inside the preparation device drops below a preset value, the inert gas is stopped from being supplied to the preparation device; and the feeding bin is fed with materials through an atomizing powder collecting tank;
    S300：打开冷干机，打开一级涡轮分级机的一级分级轮，打开二级涡轮分级机的二级分级轮，打开螺旋加料机；S300: Turn on the cold dryer, turn on the first-stage classifying wheel of the first-stage turbine classifier, turn on the second-stage classifying wheel of the second-stage turbine classifier, and turn on the screw feeder;
    S400：通过二级收粉罐获得印钛合金粉末。S400: Get the titanium alloy powder through the secondary powder collecting tank.
  6. 如权利要求5所述的一种具有流动性的3D打印钛合金粉末的制备方法，其特征在于，所述惰性气体为纯度大于99.99％的高纯氩气。The method for preparing a fluid 3D printing titanium alloy powder as claimed in claim 5, characterized in that the inert gas is high-purity argon gas with a purity greater than 99.99%.
  7. 如权利要求6所述的一种具有流动性的3D打印钛合金粉末的制备方法，其特征在于，所述惰性气体充气压力为0.2-0.3Mpa。The method for preparing a fluid 3D printing titanium alloy powder as claimed in claim 6, wherein the inert gas inflation pressure is 0.2-0.3 MPa.
  8. 如权利要求5所述的一种具有流动性的3D打印钛合金粉末的制备方法，其特征在于，所述引风机出气压力为0.25-0.35Mpa，进风速度为8-10m/s，风量1200-1500m3/h。The method for preparing a 3D printing titanium alloy powder with fluidity according to claim 5 is characterized in that the exhaust pressure of the induced draft fan is 0.25-0.35 MPa, the air inlet speed is 8-10 m/s, and the air volume is 1200-1500 m 3 /h.
  9. 如权利要求5所述的一种具有流动性的3D打印钛合金粉末的制备方法，其特征在于，所述预设值为120-150ppm。The method for preparing a fluid 3D printing titanium alloy powder as claimed in claim 5, wherein the preset value is 120-150 ppm.
  10. 如权利要求5所述的一种具有流动性的3D打印钛合金粉末的制备方法，其特征在于，所述一级分级轮的分级频率为8-10Hz，所述二级分级轮的分级频率为16-18Hz。 The method for preparing a 3D printing titanium alloy powder with fluidity as described in claim 5, characterized in that the grading frequency of the first-level grading wheel is 8-10 Hz, and the grading frequency of the second-level grading wheel is 16-18 Hz.
PCT/CN2023/094749 2022-12-15 2023-06-01 Preparation device and method for 3d printing titanium alloy powder with fluidity WO2024124798A1 (en)

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