高温反应炉炉管开裂的原因  

Cause for Cracking of High-temperature Reaction Furnace Tubes

作　　者：韩克甲 田延凯 张丹 李锦锦 周超 HAN Kejia;TIANYankai;ZHANG Dan;LI Jinjin;ZHOU Chao(Zibo Product Quality Inspection Research Institute,Zibo 255063,Shandong China;Internet Service Guarantee Center of Zibo City,Zibo 255000,Shandong China)

机构地区：[1]淄博市产品质量检验研究院,山东淄博255063 [2]淄博市互联网服务保障中心,山东淄博255000

出　　处：《热处理》2024年第3期44-46,共3页Heat Treatment

基　　金：国家市场监督管理总局科技计划项目项目(2021MK060)。

摘　　要：一高温反应炉的ZGCr25Ni35Nb-Ti钢炉管使用了几周后开裂.对开裂的炉管进行了宏观检查、化学成分分析、金相检验、断口分析和渗透探伤,以揭示其开裂的原因.结果发现,炉管发生了大量二次碳化物引起的晶间腐蚀,并有腐蚀裂纹,在高温高压下管壁产生腐蚀孔洞,导致炉管开断.The tubes in a high-temperature reaction furnace,made from ZGCr25Ni35Nb-Ti steel,cracked after several weeks of service.The macro check,chemical composition analysis,fracture test,and penetrant flaw detection were carried out on the cracked furnace tube to reveal the cause for their cracking.From the test results it was found that the furnace tube showed intergranular corrosion caused by a large amount of secondary carbides and corrosion cracks,and,as a result,the tube wall developed corrosion hole under high-temperature and high-pressure,thus resulting to the tube cracking.

关 键 词：反应炉炉管 晶间腐蚀 二次碳化物 

分 类 号：TG115[金属学及工艺—物理冶金]