喷瓷管道基体的金属组织及性能  

Metal Organization and Performance of Base Material of Spraying Porcelain Pipe

作　　者：王勇[1] 韩涛[2] 

机构地区：[1]天津大学,天津市300072 [2]石油大学,山东省东营市257062

出　　处：《石油工程建设》1999年第4期6-8,共3页Petroleum Engineering Construction

摘　　要：对喷瓷管道基体金属试验研究表明，喷瓷前后基体金属的组织和性能基本无变化，但断口形貌不同，原基体金属的拉伸断口为纯韧窝状，喷瓷后为韧窝＋微区解理断裂，且局部存在二次裂纹。经过焊接热循环作用后，基体金属的组织和性能发生显著的变化，峰温达７００℃时，基体金属中产生了大量晶间裂纹。The base metal' s microstructure and performance of sprayed porcelain pipe are studied. The results show that there are no obvious variations in the microstructure and mechanical performances, but has difference in their fracture: the one without porcelain coating is dimple rupture, the other with porcelain coating is dimple rupture with a little cleavage fracture. After welding cycling, the base metal's microstructure and performance change markedly. At peak temperature 700℃, there are lots of cracks along the grain boundary.

关 键 词：管道 喷涂陶瓷 金属组织 性能 热模拟 

分 类 号：TG174.453[金属学及工艺—金属表面处理]