焊管2024，Vol.47Issue(2)：102-108,7.DOI:10.19291/j.cnki.1001-3938.2024.02.015
工业纯钛换热管胀管开裂失效分析及预防措施
Failure Analysis and Prevention Measures of Expansion Tube Cracking of Industrial Pure Titanium Heat Exchanger Tube
摘要
Abstract
Reason has been analyzed on the cracking and the failure of TA2 pure titanium thin-walled tubes that occur during the expansion process in the manufacturing of the tube heat exchanger.By locating the fracture location of failed tubes,observing macroscopic fracture surfaces,testing characteristic areas such as EBSD,SEM,and microstructure,causes of tube failure and the mechanism of crack were explored,and the process and influencing factors of crack were analyzed.The results indicate that the failure of the thin-walled titanium tube is due to the original defect at the head of the tube that was not completely removed during the rolling stage of the finished product,resulting in subsequent expansion of the tube crack and even penetration cracking.Although the longitudinal rolling lines on the inner wall of the tube are much smaller than the standard requirements,the subsequent stress deformation of the pipe and should be eliminated as much as possible.The effective preventive measures and suggestions have been proposed for the subsequent safety production and use.关键词
TA2管材/断口形貌/失效模式/裂纹分析Key words
TA2 tube/fracture morphology/failure mode/crack analysis分类
矿业与冶金引用本文复制引用
任利娜,齐亮,杨健,苗壮,李刚,文周锋,李旭升..工业纯钛换热管胀管开裂失效分析及预防措施[J].焊管,2024,47(2):102-108,7.基金项目
陕西省重点研发计划重点产业创新链——工业领域"航空液压管路系统高可靠性连接技术"(项目编号2020ZDLGY01-07). （项目编号2020ZDLGY01-07）
