In order to solve the problem of cold cracks in welding of high strength steel with large thickness, austenitic stainless steel welding materials are usually selected in the industry, but there are few researches on the application of other austenitic welding materials such as nickel-based welding materials. In this paper, Metal Inertia Gas (MIG) welding was used to weld two typical nickel-based alloys (ERNiCrMo-3 and ERNiCrMo-4) with different contents of solid solution strengthening elements and 10Ni5CrMoV high-strength steel. The results showed that the welded joints of the two welding wires were well formed without obvious welding defects. In the impact toughness test, the average values of ERNiCrMo-3 and ERNiCrMo-4 welds at 73 K were 134 J and 96 J respectively, while in the impact test of other parts, ERNiCrMo-3 was also higher than ERNiCrMo-4. In the tensile test, the tensile strength of both can reach 877 MPa and 858 MPa. In terms of precipitates, ERNiCrMo-4 containing more solid solution strengthening elements precipitated more TCP phase, which reduced the impact toughness of the weld to a certain extent. In the hardness test, it also proved that the hardness of ERNiCrMo-4 weld with more brittle and hard precipitates was higher. Overall, ERNiCrMo-3 welding wire has more advantages in welding large thickness 10Ni5CrMoV steel.
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