About this Abstract |
| Meeting |
TMS Specialty Congress 2026
|
| Symposium
|
Energy Materials 2026
|
| Presentation Title |
Microstructure Control and High-Temperature Performance Evaluation of Large-Diameter UNS N06617 Alloy Seamless Tubes for Ultra-High-Temperature Equipment |
| Author(s) |
Man Wang, Qianmin Zhao, Weinqiang Sun, Shaobing Wang, Zhu Zhou, Baoshun Wang, Cheng Su |
| On-Site Speaker (Planned) |
Man Wang |
| Abstract Scope |
As a solid-solution strengthened nickel-based superalloy, UNS N06617 alloy exhibits excellent high-temperature strength, creep resistance, oxidation resistance and microstructural stability, making it a critical candidate for advanced energy systems with the transformation of the global energy structure.
In this work, φ410×30 mm large-diameter thick-walled seamless tubes were successfully fabricated via hot extrusion, cold rolling and solution annealing. VIM+ESR dual melting, homogenization and cogging refined purity and eliminated as-cast defects. Large-tonnage hot extrusion and heavy cold reduction coupled with stepped heat treatment overcame high deformation resistance and inhomogeneity issues. The obtained tubes present uniform equiaxed grains (see figure 1) with excellent tensile properties at room temperature and 750 ℃, as well as stable stress-rupture behavior at 807 ℃ (see figure 2). The alloy tubes show outstanding compositional uniformity, thermal stability and high-temperature service performance, meeting the requirements for long-term reliable operation under complex severe conditions. |
| Proceedings Inclusion? |
Undecided |
