Even though the buildup rate of laser powder bed fusion processes (LPBF) has steadily increased in recent years by using more and more powerful laser systems, the production of large-volume parts is still extremely cost-intensive. Joining of an additively manufactured complex part to a high-volume part made of conventional material is a promising technology to enhance economics. Today, constructors have to select the most economical joining process with respect to the individual field of application. The aim of this research was to investigate the hybrid joint properties of LBPF and conventionally casted 18MAR300 nickel maraging steel depending on the manufacturing process and the heat treatment condition. Therefore, the microstructure and the strength of the hybrid joints manufactured by LPBF or vacuum brazing were examined and compared to solid material and joints of similar material. It was found that the vacuum-brazed hybrid joints using a 50.8-μm-thick AuNi18 foil provide a high tensile strength of 904 MPa which is sufficient for a broad field of application. Furthermore, the additively manufactured hybrid samples offered with 1998 MPa a tensile strength more than twice as high but showed a considerable impact of buildup failures to the strength in general.

尽管近年来通过使用越来越强大的激光系统稳步提高了激光粉末床熔合工艺（LPBF）的堆积率，但大批量零件的生产仍然非常耗费成本。将增材制造的复杂零件连接到由常规材料制成的大批量零件上，是提高经济性的一项有前途的技术。如今，建设者必须针对各个应用领域选择最经济的连接过程。这项研究的目的是研究LBPF和常规铸造的18MAR300镍马氏体时效钢的混合接头性能，具体取决于制造工艺和热处理条件。所以，检查了由LPBF或真空钎焊制造的混合接头的微观结构和强度，并将其与固体材料和类似材料的接头进行了比较。发现使用厚度为50.8μm的AuNi18箔的真空钎焊混合接头可提供904 MPa的高拉伸强度，这足以满足广泛的应用领域。此外，增材制造的混合样品的抗拉强度为1998 MPa，高出两倍以上，但累积强度对强度的影响却很大。