钢管2024，Vol.53Issue(3)：84-88,5.DOI:10.19938/j.steelpipe.1001-2311.2024.3.84.88
34CrMo4气瓶管内表面缺陷成因分析
Analysis of Original Factors for Inner Surface Defect of 34CrMo4 Gas Cylinder Pipe
许胜 1王洪海 1陈冬 1董西岳1
作者信息
- 1. 德新钢管(中国)有限公司,江苏无锡 214177
- 折叠
摘要
Abstract
Inner surface defects like pit and micro-crack are found with the Φ457 mm×20.8 mm 34CrMo4 hot-rolled gas cylinder pipe after being hot-expanded,cold drawn,and inner surface ground and polished.And the original factors of the said defects are revealed by means of taking chemical composition analysis,micro and macro inspections,metallog-raphic analysis,and energy spectrum analysis of the defective pipe sample.It is regarded via the analyses that the defect shapes are different and distributed in random;beside the iron oxide,the pipe contains a lot of chemical elements like Ca,Mg and Si etc.,and there is slag inclusion in the inner surface defective part;considering the decarbonization ph-enomenon existing around the defect and there are oxidized pots,it is determined that the said slag inclusion is originated from the deoxidation products as developed during the steel-making process.Accordngly it is suggested to strictly control the melting and casting process parameters during the making process of the steel billet so as to ensure the billet cleanness and improve the billet quality.关键词
气瓶管/夹渣/氧化圆点/能谱分析Key words
gas cylinder pipe/slag inclusion/oxidized pots/energy spectrum analysis引用本文复制引用
许胜,王洪海,陈冬,董西岳..34CrMo4气瓶管内表面缺陷成因分析[J].钢管,2024,53(3):84-88,5.
