“…Ni20Mn6 high-alloy steel, a precision alloy defined in national standard GB/T 37797-2019, is a functional alloy with controllable thermal expansion properties, low thermal conductivity, and high plasticity [ 1 ]. Its unique properties of high dimensional stability, high temperature resistance, and corrosion resistance mean it has an irreplaceable position in niche areas, such as ocean engineering, environmental engineering, astronaut, and aerospace engineering.…”