通过扫描电子显微镜(scan electron microscopy, SEM)、光学显微镜和电化学工作站分析研究晶界工程(grain boundary engineering, GBE) 工艺对Incoloy 800 合金的耐蚀性能和力学性能的影响. Incoloy 800 合金在980 ℃ 固溶处理15 min, 冷轧5% 后在980 ℃退火15 min, 其耐晶间腐蚀能力和临界点蚀电位均显著提高, 抗拉强度和σ0.2 略有提高, 断后伸长率则变化不大.
This work investigates the effect of grain boundary engineering (GBE) on the corrosion resistance and mechanical properties of Incoloy 800 alloy by scan electron microscopy (SEM), optical microscopy and electrochemical workstation. The resistance to intergranular corrosion and critical pitting potential of Incoloy 800 alloy are improved significantly after specimens are solution treated at 980 ℃ for 15 min, followed by 5% rolling reduction and then annealed at 980 ℃ for 15 min. The tensile strength and σ0.2 increase slightly, while the elongation rate changes little.
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