摘要
介绍TP347H、Super304H、HR3C超超临界电站锅炉材料的时效析出强化机理,并在此基础上研发出620~650℃锅炉过热器/再热器用新型奥氏体耐热钢SP2215。分析认为:以22Cr-15Ni为基的Fe-Cr-Ni新型奥氏体耐热钢SP2215,通过加入一定量的Cu、Nb、N,在基体中形成多相复合强化,并在晶界形成M_(23)C_6碳化物强化。SP2215具有高的持久强度(650℃,10~5 h∧130 MPa;700℃,10~5 h∧80 MPa)和良好的抗腐蚀/氧化性能。
Analyzed in the paper is the aging-precipitation strengthening mechanism of the material as used to make the TP347H, Super304H, and HR3C ultra supercritical boilers for power plant service, based on which, the new type SP2215 austenitic heat-resistant steel for servicing 620-650 ℃ boiler super heater/reheater is developed. It is identified via relevant analysis that adding certain amounts of Cu, Nb and N to the new type 22Cr-15Ni-based Fe-Cr-Ni SP2215 austenitic heat-resistant steel leads to producing the multi-phase composite strengthening effect, and M23C6 carbide strengthening in grain boundary. The said SP2215 steel is in possession of high creep rupture strength （650℃, 105 h〉130 MPa; 700 ℃, 10 5 h〉80 MPa）. and satisfactory corrosion/oxidation-resistance.
出处
《钢管》
CAS
2018年第1期23-29,共7页
Steel Pipe
基金
国家自然科学基金项目(编号50771011)
关键词
超超临界锅炉
新型奥氏体耐热钢
SP2215
强化机理
多相复合强化
ultra supercritical boiler
new type austenific heat-resistant steel
SP2215
strengthening mechanism
multi composite strengthening
