摘要
12%Cr耐热合金钢X20CrMoV12.1是热电厂主蒸汽管线等重要部件用材。该质材的主蒸汽管道经23年长期高温负荷运行后,性能明显退化,常温下呈脆性。实验显示服役后材料的脆化是可逆的,属于逆回火脆现象。运用TEM和AES等对显微组织结构的研究显示,有害元素P在晶界的偏聚和晶界碳化物的粗化是材料性能退化和致脆的原因。
Cr heat-resistant alloy steel of X20CrMoV12.1 is used as main steam pipe and other critical components in power plants. The properties of the main steam pipe degraded greatly after service at elevated temperature for 23 years and had a tendency to embrittle in room temperature. Further investigation shows this phenomenon is typical reverse temper embrittlement (RTE) effect. The microstructure studies indicate that the segregation of harmful element P and the coarsened carbides at prior austenite boundaries result in the degradation of properties and embrittlement.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2003年第12期14-17,22,共5页
Journal of Materials Engineering
关键词
耐热合金钢
热损伤
脆性
逆回火脆现象
显微组织
磷
Cr heat-resistant alloy steel
heat damage
reverse temper embrittlement
carbide coarsening
