Selection of technological variants of argon-arc and electron-beam welding of a high-temperature nickel alloy in a thermally strengthened state

ABSTRACT

The paper clarifies the influence of TIG and EB welding variants and highly temperature-resistant nickel superalloy VG159 being in a heat-hardenable condition without post-heat treatment on mechanical properties and structure of welded joints. The research trackles the problem of short- and long-term durability at a temperature of 850 and 870°С and covers the issue of resilience. The filler materials for argon-arc welding and relevant modes for electron-beam welding are selected. They provide a high complex of mechanical properties and an appropriate structure of welded joints

KEYWORDS:

• Argon-arcwelding
• filler materials
• electronbeam welding
• welding regimes parameters
• short-term durability
• long-term durability
• structure
• resilience

Note

This work was undertaken in the framework of realization of the comprehensive direction 10.8: Fusion welding technology for new structural materials (‘Strategic directions in the development of materials and technology for their processing in the period up to 2030’) [14].