钢管2025，Vol.54Issue(1)：13-19,7.DOI:10.19938/j.steelpipe.1001-2311.2025.1.13.19
TH对大直径X80焊管粗晶热影响区组织及力学性能的影响
Influence by TH on Coarse Grain HAZ Microstructure and Mechanical Properties of Large-sized X80 Welded Pipe
陈伊祥 1王振生 1代志健 2刘春 2罗天宝 2王婷2
作者信息
- 1. 湖南科技大学机械设备健康维护重点实验室,湖南 湘潭 411201
- 2. 湖南胜利湘钢钢管有限公司,湖南 湘潭 411101
- 折叠
摘要
Abstract
The coarse grain HAZ(CGHAZ)is regarded as an area with the most weak mechanical property of the welded joint.The influence by the high temperature residence time(TH)on the CGHAZ microstructure and the mechanical properties is studied by means of the test and the digital simulation,etc.As a result,the facts as following is revealed.Along with the increase of the TH,the CGHAZ toughness is reduced,the diffusion coefficients of carbon and nitrogen atoms are increased austenite grain,and the M-A component distribution is homogenized;once the TH is about 12 s,the CGHAZ presents best comprehensive performance;thanks to the digital simulation method,the process parameters are found out suitable for TH as 12 s.The said method is used for the actual linepipe steel welding test,resulting in the overall mechanical properties of the welded joint up to the requirements as specified under the Technical Specification of the China-Russia Natural Gas Pipeline Project.Moreover the accuracies of the thermal simulation test and the digital simulation are verified,providing reference for optimization of actual welding process.关键词
焊管/粗晶热影响区/热模拟试验/高温停留时间/M-A组元/数值模拟Key words
welded pipe/CGHAZ/thermal simulation test/TH/M-A component/digital simulation引用本文复制引用
陈伊祥,王振生,代志健,刘春,罗天宝,王婷..TH对大直径X80焊管粗晶热影响区组织及力学性能的影响[J].钢管,2025,54(1):13-19,7.
