Additive manufacturing (AM) using PBF (powder bed fusion) is widely applied in industry with many advantages but also some drawbacks such as productivity rates and limited dimensions. Future implementations of AM will require a re-design of components in order to reserve AM for the particular complex geometries, to join AM subassemblies or to connect with conventional components. It brings the aspect of weldability of AM parts in the picture. This study is investigating the weldability of AM 316L components using common welding processes such as manual GTAW. Bead-on-plate tests were started as a first step to examine weldability. After satisfactory results, two AM pipe components were fabricated (PBF) in the same built to be welded to conventional 316L parts. One AM pipe component was used to characterize the mechanical properties while the other test coupon was welded to conventional pipe by manual GTAW. The test welds were submitted to a mechanical and corrosion testing program including creep rupture testing. It was decided to start the weldability analysis in the worst condition, i.e., As Build/As Welded (AB/AW) without any heat treatment nor post-processing. Based upon the results obtained for the conditions tested, it could be concluded that AM (PBF) components are weldable.

使用PBF（粉末床熔合）的增材制造（AM）具有许多优点，但也有许多缺点，例如生产率和有限的尺寸，在工业上得到了广泛应用。AM的未来实现将需要重新设计组件，以便为特定的复杂几何体保留AM，加入AM子组件或与常规组件连接。它在图片中带来了AM零件的可焊接性方面。这项研究正在研究使用常规焊接工艺（例如手动GTAW）对AM 316L部件的可焊性。作为测试可焊性的第一步，开始了板上焊道测试。获得令人满意的结果后，在同一建筑物中制造了两个AM管组件（PBF），可以焊接到常规316L零件上。一个AM管组件用于表征机械性能，而另一块测试试样通过手动GTAW焊接到常规管上。测试焊缝已提交机械和腐蚀测试程序，包括蠕变断裂测试。决定在最恶劣的条件下开始进行可焊性分析，即未经任何热处理或后处理的原始/焊接状态（AB / AW）。根据在测试条件下获得的结果，可以得出结论：AM（PBF）组件是可焊接的。