核电站用核级08X18H10T不锈钢管的国产化  

Domestic Manufacturing of Nuclear-Grade Austenitic Stainless Steel Pipes 08X18H10T Used in Nuclear Power Station

作　　者：郑越 马可腾 崔岚 张跃[2] 马小军 

机构地区：[1]中国核电工程有限公司,北京100840 [2]环境保护部核与辐射安全中心,北京100082 [3]中兴能源装备股份有限公司,南通226126

出　　处：《机械工程材料》2014年第2期39-43,共5页Materials For Mechanical Engineering

摘　　要：为对核电站原始设计用核级08X18H10T奥氏体不锈钢管采用国产TP321钢管进行替代,分析了国产TP321钢的化学成分、制造工艺以及热处理工艺对TP321钢管室温和350℃拉伸性能、显微组织、晶粒度以及抗晶间腐蚀性能的影响,确定了合适的成分与工艺。结果表明:调整后工艺是在TP321钢制造过程中增大坯料尺寸并在原有工艺的基础上增加一道冷轧、中间热处理和一道冷拔,然后在1 100℃固溶保温11min;工艺调整后制备的TP321钢管室温抗拉强度可由原有工艺的540MPa提高到556MPa,350℃屈服强度由170MPa提高到250MPa,晶粒度达4.5级;通过控制TP321钢的化学成分使国产TP321钢管既能满足ASME的规定,同时也能达到对08X18H10T钢力学性能的要求,实现此不锈钢管的国产化。In order to realize the domestic manufacturing of nuclear-grade austenitic stainless steel pipes TP321 instead of 08X18H10T steel used in the original design for guclear power station. The effects of chemical composition, manufacturing process and heat treatment on tensile properties at room temperature and 350 ℃, microstructure, grain size and anti-intergranular corrosion property of the TP321 steel were analyzed to find a suitable chemical composition and technique. The results show that the modified process which used blank with big dimension, and added a path of cold-rolling, one middle heat treatment and one cold-drawn process based on the original process, and then solution treatment at 1 100 ℃ for 11 rain was set up. The tensile strength at room temperature of TP321 steel prepared by the modified process increased from the original process of 540 MPa to 556 MPa the yield strength increased from 170 MPa to 250 MPa; the grain size was 4. 5. By controlling the chemical composition, the domestic TP321 steel can both meet the requirements of ASME and reached the mechanical properties of 08X18H10T steel, and finally realized the domestic manufacturing of nuclear-grade austenitic stainless steel pipes.

关 键 词：TP321钢 化学成分 制造工艺 力学性能 

分 类 号：TG306[金属学及工艺—金属压力加工]