YP500 N/mm2 Class High Strength Steel Plates for Offshore Structures with Excellent CTOD Properties at Welded Joints

被引：0
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作者：
Yusuke, Terazawa [1 ]
Toshitaka, Tanaka [2 ]
Shinichi, Suzuki [3 ]
机构：
[1] Steel Products Research Dept., Steel Res. Lab., JFE Steel, Japan
[2] Plate Sec., Products Design & Quality Control for Steel Products Dept., West Japan Works (Fukuyama), JFE Steel, Japan
[3] Plate Business Planning Dept., JFE Steel, Japan
来源：
JFE Technical Report | 2021年 / 26期
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摘要：
Increase of the size of offshore structure proceeds steadily, and the strength and plate thickness required for steel plates have increased. In addition, the demand for specifications with welded joint CTOD properties has also increased for the construction in cold regions. Therefore, it is necessary to achieve both high strength of the base plate and excellent HAZ toughness. JFE Steel has developed steel plates with excellent welded joint CTOD property through elaborate HAZ microstructure control utilizing microalloying technology. This developed steel has both high strength of base plate and excellent welded joint CTOD properties by applying advanced thermo-mechanical control process and making island martensite, which is an embrittlement microstructure in HAZ, harmless. In this paper, YP500 N/mm2 class steel plate of 75 mm in thickness with excellent CTOD properties is introduced. Copyright © 2021 JFE Steel Corporation. All Rights Reserved.
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页码：143 / 149
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