Polished Hastelloy 276

Nickel-based alloy was developed in the late 1930s, and the United Kingdom first produced nickel-based alloy Nimonic75(Ni-20Cr-0.4Ti) in 1941. In order to improve the creep strength, Nimonic 80(Ni-20Cr-2.5Ti-1.3Al) was prepared by adding Al. The United States in the mid-1940s, Russia in the late 1940s, and China in the mid-1950s have also developed nickel-based alloys. The development of nickel-based alloys includes two aspects, namely, the improvement of alloy composition and the innovation of production technology. In the early 1950s, the development of vacuum smelting technology created conditions for refining nickel-based alloys containing high Al and Ti, which led to a substantial increase in alloy strength and use temperature. In the late 1950s, due to the increase in the working temperature of the turbine blade, the alloy is required to have a higher high temperature strength, but the strength of the alloy is high, it is difficult to deform, or even can not deform, so the precision casting technology is used to develop a series of casting alloys with good high temperature strength. In the mid-1960s, directional crystallization and single crystal superalloys with better properties were developed, as well as powder metallurgy superalloys.