理化检验-物理分册2023，Vol.59Issue(12)：1-5,11,6.DOI:10.11973/lhjy-wl202312001
HP-Nb合金转化炉管服役过程中的损伤规律
Damage law of HP-Nb alloy reformer tube in service process
摘要
Abstract
The microstructure damage and mechanical properties degradation of HP-Nb alloy reformer tubes during service were studied.The microstructure evolution and oxidation damage of reformer tubes with different service time were analyzed by optical microscope and X-ray diffractometer.At the same time,its mechanical properties at room temperature,high temperature creep properties and high temperature relaxation resistance were studied.The results show that the primary carbides of HP-Nb alloy furnace tubes were coarsened by long-term high temperature service,and a continuous network structure was formed at the grain boundary.A large number of secondary carbides were also precipitated in the crystal,and grow with the extension of service time.The initial carbide was transformed from M7C3 carbide to M23C6 carbide.Internal oxidation occurred during the service of HP-Nb alloy,and the oxide film and Cr-depleted zone under the oxide film were formed on the inner and outer surfaces of the furnace tube.After long-term service,the room temperature tensile strength,plasticity and toughness,high temperature creep performance and high temperature relaxation resistance of the furnace tube were significantly reduced.关键词
HP-Nb合金/高温蠕变/碳化物/氧化膜/显微组织Key words
HP-Nb alloy/high temperature creep/carbide/oxide film/microstructure分类
矿业与冶金引用本文复制引用
陈海见,徐辽,张波,郭景锋..HP-Nb合金转化炉管服役过程中的损伤规律[J].理化检验-物理分册,2023,59(12):1-5,11,6.基金项目
江西省教育厅科学技术研究项目(GJJ211606) （GJJ211606）
江西省自然科学基金项目(20232BAB204005) （20232BAB204005）
