摘要
X12CrMoWVNbN10-1-1耐热钢因其优良的性能被用作超超临界蒸汽轮机转子和叶片材料,缺点是随着温度的升高,其性能迅速下降。采用真空电弧离子镀在该耐热钢表面沉积TiAlCrN/NiCrAlY涂层,研究了该涂层的表面形貌、截面形貌、成分和结合力,同时还研究了该涂层在650℃条件下的热震性能。结果表明:使用真空电弧离子镀可制备厚度为8μm的致密TiAlCrN/NiCrAlY涂层,表面成分为Ti0.51Al0.17Cr0.16N0.15。涂层的临界开裂应力LC1为25N,涂层与基体剥离的临界载荷LC2大于60N。通过沉积TiAlCrN/NiCrAlY涂层可显著提高该耐热钢的抗热震性能。
X12 CrMoWVNbN10-1-1 heat-resistant steel is used as rotor and blade material for ultra-supercritical steam turbine due to its excellent performance. The disadvantage is that its performance decreases rapidly with the increase of temperature. TiAlCrN/NiCrAlY coating was deposited on the surface of the heat-resistant steel by vacuum arc ion plating. The surface morphology, cross-section morphology, composition and adhesion of the coating were studied. The thermal shock properties of the coating at 650 ℃ were also studied. The results show that, the dense TiAlCrN/NiCrAlY coating with the thickness of 8 μm can be prepared by vacuum arc ion plating, and the surface composition is Ti0.51 Al0.17 Cr0.16 N0.15. The critical cracking stress(LC1) of the coating is 25 N, and the critical load of peeling between coating and substrate(LC2) is more than60 N. The thermal shock resistance of the steel can be improved by depositing TiAlCrN/NiCrAlY coating.
作者
张华煜
陈慧琴
尚小端
ZHANG Huayu;CHEN Huiqin;SHANG Xiaoduan(School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;School of Materials Science and Engineering,Northwestern Polytechnical University,Xi'an 710072,China)
出处
《热加工工艺》
北大核心
2019年第20期102-105,共4页
Hot Working Technology
基金
国家自然科学基金项目(51575372)
