| 摘要: |
| 针对高压长距离油气输送管线的发展带来的对高强度钢管的巨大需求,论述了X100级管线钢的研究发展状况、冶金学设计原理、力学性能,以及现场焊接性等问题。指出X100级管线钢的生产需要综合应用超纯净冶炼、控轧控冷工艺以及合理的合金设计等多方面的先进技术和措施。X100级管线钢具有优良的力学性能,下屈服强度可达690 MPa以上。采用合适的焊接工艺,可获得较好的现场焊接性和强韧性良好的焊接接头,X100级管线钢的生产以及材料标准的制定等问题还有待进一步的研究。 |
| 关键词: X100级管线钢 组织结构 延性止裂 环缝焊接 焊接性 |
| DOI： |
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| Review of X100 pipeline steel and its field weldability |
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YAN Chunyan1, LI Wushen1, FENG Lingzhi1, XUE Zhenkui2, BAI Shiwu2, LIU Fangming2
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1.School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;2.Petroleum-Gas Pipeline Research Institute of China, Langfang 065000, Hebei, China
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| Abstract: |
| In view of the ever-increasing pipeline length and operating pressure, development of high-strength linepipes has become increasingly attractive and needed.The current knowledge of X100 pipeline steel about research and development status, metallurgical principles, mechanical properties, field weldability, and so on were presented.Production of grade X100 steel requires combination of super-clean refining, thermo-mechanical controlled process, proper metallurgical design and some other advanced techniques.Excellent mechanical properties and satisfying weldability are possessed for grade X100 steel.Yield strength of X100 grade steel generally exceeds 690 MPa.High strength-toughness welded joint can be obtained through proper welding procedures.Further work is required to improve the production of X100 pipeline steel and to establish appropriate material standards. |
| Key words: X100 pipeline steel microstructure ductile fracture arrest girth welding weldability |
