This study aims to evaluate the weldability of dissimilar welds with the Inconel 625 and the Hastelloy C-276 nickel-based alloys deposited on ASTM A36 and AISI 1045 carbon steel plates. The welds were carried out by the GMAW process and evaluated by the Trans-Varestraint test. The test results were statistically evaluated, and Fusion Zone solidification processes were simulated in JMatPro software using several dilution levels. The analysis of variance (ANOVA) test results showed that the two different base metals did not affect the weldability of Inconel 625. However, the Hastelloy C-276 alloy showed a significant drop in weldability with the AISI 1045 steel compared to the ASTM A36. The results of the Hastelloy C-276 as the filler metal and the AISI 1045 steel as the base metal showed greater susceptibility to solidification cracking than all the other pairs tested, according to the Trans-Varestraint test. Moreover, the ANOVA test results indicated that the different heat input levels did not influence the sets’ weldability; this was probably because there was only a tiny variation in the dilution levels. The solidification process simulation indicates that higher dilution levels promote the precipitation of a larger secondary phase fraction.

本研究旨在评估沉积在 ASTM A36 和 AISI 1045 碳钢板上的 Inconel 625 和 Hastelloy C-276 镍基合金的异种焊缝的可焊性。焊缝采用 GMAW 工艺进行，并通过 Trans-Varestraint 测试进行评估。对测试结果进行统计评估，并在 JMatPro 软件中使用多种稀释水平模拟融合区凝固过程。方差分析 (ANOVA) 测试结果表明，两种不同的母材不会影响 Inconel 625 的可焊性。然而，与 ASTM A36 相比，Hastelloy C-276 合金与 AISI 1045 钢的可焊性显着下降。根据 Trans-Varestraint 测试，Hastelloy C-276 作为填充金属和 AISI 1045 钢作为母材的结果表明，与所有其他测试对相比，更容易发生凝固开裂。此外，ANOVA 测试结果表明，不同的热输入水平不会影响套件的可焊性；这可能是因为稀释水平只有很小的变化。凝固过程模拟表明，较高的稀释水平促进较大的第二相部分的沉淀。