Ti-5Ta-30Nb-8Zr合金粉床电子束3D打印分区熔化扫描成形工艺研究

Study on Partition Melting Scanning Forming Process of Selective Electron Beam Melting with Ti-5Ta-30Nb-8Zr alloy

以球形Ti-5Ta-30Nb-8Zr合金粉末为原料,开展了粉床电子束3D打印技术制备钛合金样品的工艺研究。通过分区成形工艺控制,在一次成形中完成多种熔化电流或多种扫描速度的并行实验,快速获得该合金粉末在不同熔化工艺下的成形样品。粉床电子束3D打印成形Ti-5Ta-30Nb-8Zr合金的最佳工艺参数为熔化电流20 m A,扫描速度800 mm/s。在该工艺条件下,加工出的钛合金样品致密度高、内部缺陷少、组织均匀。与传统实验方法相比,分区控制成形技术的研究效率提高150%,可大幅降低研发成本。

Ti-5 Ta-30 Nb-8 Zr alloy was manufactured from spherical metal powder by electron beam 3 D printing. Through the partition melting scanning forming process,various melting currents or multiple scanning speeds wer completed in one experiment,and the formed samples of the alloy under different processes were quickly obtained. The optimum process parameters for the electron beam 3 D printing forming Ti-5 Ta-30 Nb-8 Zr alloy are 20 m A（ melting current） and 800 mm/s（ scanning speed）. Under this process,the titanium alloy samples have high density,less defects and uniform structure.Compared with the traditional experimental methods,the efficiency of partition melting scanning forming process is improved by 150%,which greatly reduces the research costs.