为分析转炉烟罩冷却水管早期失效原因,用金相显微镜,扫描电镜,X射线衍射仪等对失效水管进行了检验和分析,结果表明,水管外壁的孔洞是内壁扩展到外壁的热疲劳裂纹,疲劳裂纹是在高温和交变热应力状态下发生的氧腐蚀造成的。
The optical microscope,scanning electron microscope and X-ray diffractometer were used to find out the failure reason of the water pipes in the converter hood.The result showed that the holes on the pipes were caused by the thermal fatigue cracks,which were created under the condition of the high temperature and the alternating thermal stress.
参考文献
| [1] | GB5310-2008高压锅炉用无缝钢管[S].北京:中国标准出版社,2008. |
| [2] | 陈吉刚;梁锋;丁玉华.锅炉管的失效和防止措施(二)[J].热力发电,1992(02):59. |
| [3] | 宋志坤;刘伟;何庆复 .金属材料疲劳寿命的定量研究方法[J].机械工程材料,1999,23(05):4. |
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