The invention provides a method for additive manufacturing of a high-strength and high-toughness laminated titanium alloy composite material, which comprises the following steps: mixing titanium alloy powder with B4C particles with different particle size grades to obtain a plurality of mismatched mixed powder; wherein the particle sizes of the B4C particles are in multiple stages of continuous gradient change; and the mixed powder passes through a multi-barrel powder feeder, additive manufacturing is carried out in a protective atmosphere environment, and the printing technology comprises the following steps that printing deposition of the first layer to the fifth layer is completed in a layer-by-layer growth mode at the preset laser power and the scanning interval corresponding to each layer from the nanometer level to the micrometer level, and the printing deposition of the fifth layer is completed at the scanning interval from the nanometer level to the micrometer level. And the printing process of the layer-by-layer growth mode is repeated until printing of the workpiece is completed. The phase composition of the particle reinforced titanium-based composite material is optimally designed, the B4C particles with different particle sizes and the titanium alloy are subjected to powder mixing operation, the uniformly mixed powder is subjected to powder feeding and printing, a target structure with the controllable grain size is obtained, and obdurability matching of the Ti-6Al-4V titanium alloy is achieved.

    本发明提供一种增材制造高强高韧叠层钛合金复合材料的方法,包括将钛合金粉末与不同粒径等级的B4C颗粒进行混合,获得多个错配的混合粉末;其中所述的B4C颗粒的粒径成连续梯度变化的多级;将混合粉末通过多筒送粉器并在保护气氛环境下进行增材制造,打印工艺包括以下过程:以逐层生长的方式,以每一层对应预设的激光功率和扫描间距分别完成第1层至第5层的打印沉积,从纳米级到微米级,重复上述逐层生长的方式的打印过程,直到完成工件的打印。本发明对颗粒增强钛基复合材料的相组成进行优化设计,通过将不同粒径尺寸的B4C颗粒与钛合金进行混粉操作,将混合均匀后的粉末进行送粉打印,获得晶粒大小可控的目标组织,实现Ti‑6Al‑4V钛合金的强韧性匹配。


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    Title :

    High-strength and high-toughness laminated titanium alloy composite material, preparation method and aircraft landing gear using same


    Additional title:

    高强高韧叠层钛合金复合材料、制备方法以及使用其的飞机起落架


    Contributors:
    DAI GUOQING (author) / GUO YANHUA (author) / SUN ZHONGGANG (author) / CHANG HUI (author)

    Publication date :

    2022-10-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    C22C Legierungen , ALLOYS / B22F Verarbeiten von Metallpulver , WORKING METALLIC POWDER / B33Y ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING , Additive (generative) Fertigung, d. h. die Herstellung von dreidimensionalen [3D] Bauteilen durch additive Abscheidung, additive Agglomeration oder additive Schichtung, z. B. durch 3D- Drucken, Stereolithografie oder selektives Lasersintern / B64C AEROPLANES , Flugzeuge



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