Nickel-based superalloy for exhaust valve

Abstract

The invention discloses a nickel-based superalloy for an exhaust valve. The alloy consists of the following components in percentage by weight: 0.10 to 0.14 percent of C, 3.5 to 4.5 percent of Al, 1.5 to 2.5 percent of W, 2.0 to 4.0 percent of Mo, 13.5 to 15.5 percent of Cr, 0.4 to 0.6 percent of V, 0.10 to 0.20 percent of Zr, 0.5 to 1.5 percent of Nb, 8.0 to 12.0 percent of Fe, 2.5 to 3.5 percent of Ta, less than or equal to 0.20 percent of Cu, less than or equal to 0.8 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.015 percent of S, less than or equal to 0.3 percent of Si and the balance of Ni and inevitable impurities.

Description

technical field [0001] The invention relates to the field of alloy technology, in particular to a nickel-based superalloy for an exhaust valve. Background technique [0002] Superalloys are alloys based on Group VIIIA metals (iron, cobalt, nickel) with high room temperature and high temperature strength. It has been more than 60 years since the generation and development of superalloys. Driving its development is the demand for heat-resistant alloys for gas turbines in the aerospace industry. The development of superalloys has also led to the progress of alloy chemistry and alloy processing technology. Nickel-based superalloys have higher high-temperature strength. They are developed on the basis of Cr20Ni80 alloys, and are usually strengthened with alloy elements such as Cr, Mo, Co, Ti, Al; the main elements of Cr, Mo, Co, etc. The function is to strengthen the nickel-based solid solution, increase the recrystallization temperature of the matrix, and reduce the diffusion...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, one of the purposes of the present invention is to provide a nickel-based superalloy for exhaust valves, so as to solve the problem that the materials in the prior art cannot meet the needs