材料科学与工程学报2026，Vol.44Issue(2)：177-187,210,12.DOI:10.14136/j.cnki.issn1673-2812.2026.02.002
油气田极端工况下等通道角挤压高锰钢微观结构与力学性能的温度效应
Temperature Effect on Microstructure and Mechanical Properties of ECAP High Manganese Steel Under Extreme Operating Conditions in Oil and Gas Fields
摘要
Abstract
In response to extreme working conditions such as high temperatures and high pressures,low temperature gathering and transportation,and acid corrosion in oil and gas fields,traditional pipe materials(carbon steel,low-alloy steel)suffer from strength toughness imbalance and insufficient corrosion resistance,this study successfully prepared twinning induced plasticity(TWIP)steel with a chemical composition of Fe-25Mn-1.66Si-1.23Al,and subjected it to severe plastic deformation(SPD)through equal channel angular pressing(ECAP)at room temperature and 300℃.Different characterization methods were used to analyze its microstructure,and tensile tests were conducted before and after ECAP to test mechanical properties.The results show that after ECAP,the grains of TWIP steel are elongated,especially at room temperature,where the grain size decreases sharply.Transmission electronic microscopy(TEM)analysis confirmed the presence of twinning under all ECAP extrusion conditions.However,after multiple ECAP processes at room temperature and higher temperatures,it is more likely to induce complex secondary twinning morphology.One ECAP at room temperature will result in equal strain effects for two passes at 300℃.The strain hardening behavior is analyzed through the ln(dσ/dε)-lnσ plot,and the results show that annealed samples have relatively high strain hardening ability,while the strain hardening performance of ECAP treated samples gradually decrease with the increase of the total strain applied by ECAP.关键词
TWIP钢/等通道挤压/温度效应/孪晶/力学性能Key words
TWIP steel/ECAP/Temperature effect/Twins/Mechanical behavior分类
矿业与冶金引用本文复制引用
王雷,廖正东,安维杰,李丹,王卉..油气田极端工况下等通道角挤压高锰钢微观结构与力学性能的温度效应[J].材料科学与工程学报,2026,44(2):177-187,210,12.基金项目
国家自然科学基金项目(12102340) （12102340）
陕西高校青年创新团队建设项目(陕教函2023-997-29) （陕教函2023-997-29）
西安石油大学青年科研创新团队项目(2019QNKYCXTD14) （2019QNKYCXTD14）
东北大学轧制技术及连轧自动化国家重点实验室开放基金项目(2022RALKFKT009) （2022RALKFKT009）
清华大学高端装备界面科学与技术全国重点实验室开放基金项目(SKLTKF22B10) （SKLTKF22B10）
河南省冲击与工程结构灾害动力学国际联合实验室开放基金项目(LDIDES-KF2022-02-02-02) （LDIDES-KF2022-02-02-02）
西安交通大学金属材料强度国家重点实验室项目(20242605) （20242605）
