Development and microstructure characterization of BG110E high-strength expansion pipe

作     者：DONG Xiaoming ZHANG Zhonghua GAO Zhan DONG Xiaoming;ZHANG Zhonghua;GAO Zhan

作者机构：Research InstituteBaoshan Iron&Steel Co.Ltd.Shanghai 201999China State Key Laboratory of Oil and Gas EquipmentShanghai 201999China 

出 版 物：《Baosteel Technical Research》 (宝钢技术研究（英文版）)

年 卷 期：2024年第18卷第1期

页      面：37-42页

学科分类：0820[工学-石油与天然气工程] 082001[工学-油气井工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：retained austenite two-phase zone heat treatment medium manganese steel 

摘      要：The BG110E high-strength expansion pipe was developed using medium manganese steel and subjected to a two-phase zone heat treatment *** properties and microstructure analysis results have proven that the BG110E expansion pipe exhibits uniform elongation of more than 19%.Moreover,after undergoing expan-sion deformation,its strength,toughness,and plasticity are found to meet the stringent requirements of the P110 *** microstructure of this high-strength expansion pipe,which has a strength of 110 ksi(1 ksi=6.895 MPa),consists of tempered martensite,ferrite,retained austenite,and granular *** propotion of retained austenite reaches up to 12%,ensuring high plasticity and the occurrence of the transformation-induced plasticity effect during the deformation ***,it enhances the coordinated deformation ability between different phases,which significantly improves the internal yield pressure of the BG110E high-strength expansion pipe in turn.