摘要
通过化学成分分析、宏观与微观检验、腐蚀产物分析等方法,对316L不锈钢人孔盖板发生爆裂的原因进行了分析。结果表明:人孔盖板爆裂是由应力腐蚀引起的。造成应力腐蚀的原因是采用冷冲压成型的球形人孔盖板具有较大的残余拉应力,而其工作环境中也存在周期性变化的工作应力。
The bursting reason of manhole cover of 316L stainless steel was analyzed by means of chemical composition analysis, macro and micro examination, corrosion product analysis. The results showed that manhole cover bursted due to stress corrosion. The reason of stress corrosion was that there would be strong residual stress in hemispherical manhole cover by cold pressing, while stress with cyclical change also existed in the working condition.
出处
《理化检验（物理分册）》
CAS
2012年第3期197-199,205,共4页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
关键词
不锈钢
人孔盖板
应力腐蚀
真空制盐
stainless steel
manhole cover
stress corrosion
vacuum salt production
