摘要
在全面分析已服役１０年的ＨＫ４０炉管损伤状况的基础上，研究了ＨＫ４０炉管母材和焊接接头的蠕变裂纹扩展速率，评价了这２种不同部位抗蠕变裂纹扩展的能力。结果表明在长期正常的运行中，特别是服役后期，下部炉管焊缝中的蠕变裂纹扩展比母材裂纹扩展快。
On the basis of
metallographical study of damage states of a HK40 tube which have serviced for ten years,
creep crack growth tests on its base metal and weld are carried out, the resistance of the
different parts against creep crack growth is studiedThe results show that creep crack growth of
the weldments located in the lower part of the furnace tube is faster than that of the base metal
after a long period of operation,especially in the later service period Microstructure damage and
stress concentration in the weld are two important factors contributing to faster creep crack
growth rates
出处
《石油化工设备》
CAS
1999年第3期6-10,共5页
Petro-Chemical Equipment
