Effects of Two Heat Treatment Processes on Mechanical Properties and Corrosion Resistance of N07718 Nickel-Based Alloy

• Published in: Cai liao bao hu Vol. 57; no. 1; pp. 188 - 195
• Main Author: LI Liangqing, CHENG Wenjia, ZHONG Chongdi, SHI Shengkai, LIN Xueqiang
• Format: Journal Article
• Language: Chinese
• Published: Editorial Department of Materials Protection 01.01.2024
• Subjects: n07718|δ precipitate phase|toughness and plasticity|corrosion resistance|heat treatment process
• ISSN: 1001-1560
• DOI: 10.16577/j.issn.1001-1560.2024.0024

To investigate the effects of different heat treatment processes on the mechanical properties and corrosion resistance of nickel-based alloys，comparative tests of mechanical properties such as tension and low-temperature impact of N07718 materials with two kinds of different solid solution aging holding times were conducted using a universal tensile testing machine and a pendulum impact testing machine.At the same time，high-temperature and high-pressure H2 S/CO2 corrosion electrochemical testing equipment was used to conduct high-temperature and high-pressure electrochemical testing on the materials after two kinds of heat treatment processes.The results showed that the solid solution holding time greatly influenced the toughness and plasticity of the N07718 material but had a minor effect on its corrosion resistance.The reasons for the differences in toughness and plasticity between the two N07718 materials were analyzed through thermal field emission scanning electron microscopy (FE-SEM) and energy-dispersi