摘要
采用超高强度钢 37SiMnCrNiMoV制造高压容器 ,在某些情况下储存会显著降低其使用性能 ,这种现象被称为储存效应 .本文以应力腐蚀破坏时间变化来衡量储存效应的强弱 .研究了储存时间与储存后除氢处理对储存效应的影响 .研究结果表明储存效应的实质是在第二类内应力诱导下由环境向材料内部渗氢并集聚到峰值应力区 ,进而在夹杂物尖端产生显微裂纹的过程 .
Super-strength steel 37SiMnGrNiMoV is widely used in aeronautics and astrospace because of the high specific strength. However the service life of its pressure vessel made of steel 37SiMnCrNiMoV will be decreased after long-term storage in air environment, the phenomenon is called storage effect. Stress corrosion crack test is used to evaluate the storage effect. Effects of storage time and hydrogen-elimination treatment after storage in the buffer solution on the stress corrosion crack time are studied. Results show that the substance of storage effect is a process, in which hydrogen from the environment is induced to material and is gathered at the stress-peak fields by second internal stress, then making the microcracks produced in the tip of the inclusions.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2001年第1期1-4,共4页
Journal of Beijing University of Aeronautics and Astronautics
