20G无缝钢管开裂原因  

Cracking reason of 20G seamless steel pipe

作　　者：杨文静 薛俊鹏 樊孝文 温娟[2] 蔡双雨 YANG Wenjing;XUE Junpeng;FAN Xiaowen;WEN Juan;CAI Shuangyu(ANGONG Corrosion Testing Laboratory Technology(Wuxi)Co.,Ltd.,Wuxi 214028,China;Technical Research Institute of Shougang Group Co.,Ltd.,Beijing 100041,China;National Center for Materials Service Safety,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]安工腐蚀检测实验室科技(无锡)有限公司,无锡214028 [2]首钢技术研究院,北京100041 [3]北京科技大学国家材料服役安全科学中心,北京100083

出　　处：《理化检验（物理分册）》2022年第12期47-50,76,共5页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：某20G无缝钢管在服役一段时间后发生开裂,采用化学成分分析、硬度测试、金相检验、扫描电镜和能谱分析等方法分析其开裂原因。结果表明:该20G无缝钢管内表面发生严重脱碳,且脱碳原因与穿孔和连轧工艺有关。A 20G seamless steel pipe cracked after a period of service. The cracking reasons were analyzed by means of chemical composition analysis, hardness test, metallographic examination, electron microscope scanning and energy spectrum analysis. The results show that serious decarburization occured on the inner surface of the 20G seamless steel tube, and the decarburization reason was related to the piercing and continuous rolling process.

关 键 词：20G无缝钢管 腐蚀 脱碳 开裂 

分 类 号：TB31[一般工业技术—材料科学与工程] TG115.2[金属学及工艺—物理冶金]