摘要
利用化学分析，金相、ＳＥＭ、ＳＡＭ和ＥＳＣＡ等技术对１８－８型不锈钢制成的催化裂化装置膨胀节波纹管的失效原因进行了调查．结果表明：大约有８０％的波纹管是由Ｃｌ－引起的ＳＣＣ所致．不规范的安装引起的残余拉应力水平是确定波纹管安全运行寿命的关键因素，采用消除应力退火、表面改性。
In the paper the analysis results of 29 failed 18\|8SS bellows for catalytic cracking device were summerized. The analysis was performed by means of various techniques including chemical analysis, metallography, SEM,SAM and ESCA. The results showed that near by 80% of the bellow failures resulted from stress corrosion crack (SCC) due to chlorine ion; The magnitude of residual stress resulted from improper design and installation, which limiled strongly the lifetime of the bellows service. The protective measures such as annealing for stress-relieving, surface modification and application of new alloy(FN) have been taken and outstanding economical benefit has been obtained.\=
出处
《腐蚀科学与防护技术》
CAS
CSCD
1999年第4期237-240,共4页
Corrosion Science and Protection Technology
