This study investigates the effect of a built-up sequence on the hot-cracking resistivity of dissimilar clads. Dissimilar clads of Inconel 52 and austenitic stainless steel (STS) 308L were produced using submerged arc-welding of the carbon steel. Hot-cracking occurred near the fusion boundary when the STS 308L was cladded to the buffer layer of Inconel 52 (STS 308L/Inconel 52 clad). Causative factors were identified as: (i) the wide transition zone in the interface between the dissimilar clads, and (ii) the eutectic-type Laves phase having a high level of S and P contents and a continuous geometry of thin films formed along the grain boundary. Hot cracks did not appear when Inconel 52 was cladded to the buffer layer of 308L stainless steel (Inconel 52/STS 308L clad). Hot-cracking resistivity was significantly improved by forming δ-ferrite in the interfacial boundary for the Inconel 52/STS 308 L clad.

这项研究调查了建立的序列对不同覆层的热裂电阻率的影响。使用碳钢的埋弧焊生产了Inconel 52和奥氏体不锈钢（STS）308L不同的包层。当将STS 308L包覆到Inconel 52的缓冲层（STS 308L / Inconel 52包覆层）附近时，在熔合边界附近发生热裂纹。导致因素被确定为：（i）互不相同的复层之间的界面处的过渡区较宽；（ii）具有高含量的S和P含量的共晶型Laves相，以及沿其形成的连续的薄膜几何形状晶界。当将Inconel 52覆层到308L不锈钢的缓冲层（Inconel 52 / STS 308L覆层）上时，没有出现热裂纹。