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首页> 外文期刊>JFE technical report >High Performance Steel Plates for Bridge Construction -High Strength Steel Plates with Excellent Weldability Realizing Advanced Design for Rationalized Fabrication of Bridges-
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High Performance Steel Plates for Bridge Construction -High Strength Steel Plates with Excellent Weldability Realizing Advanced Design for Rationalized Fabrication of Bridges-

机译：桥梁施工用高性能钢板-焊接性优异的高强度钢板，实现了桥梁的合理设计的先进设计-

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摘要

A new YP500 MPa grade high strength steel plate was developed to meet the requirements of BHS500 (BHS: bridge high performance steel). Microstructure control of extremely-low carbon bainite steel by thermo-mechanical controlled rolling anal, controlled cooling by the Super-OLAC were applied to realize production of an as-rolled (non-heat-treated) high yield point steel with low PCM by an on-line process. The developed steel satisfied the required mechanical properties and showed satisfactory toughness after cold working and no deterioration in mechanical properties after the line-heating process. The maximum hardness of the heat affected zone (HAT) was less than 280 points in Vickers hardness (HV) under small heat input conditions such as arc-strike, showing excellent welding hardening resistance, and no cracking occurred in the y-groove weld cracking test, indicating that preheating is not required for welding. Evaluation of butt welded joints produced by electro gas welding (EGW) and submerged arc welding (SAW) also revealed that the developed steel plate has good weldability.
机译：为了满足BHS500（BHS：桥梁高性能钢）的要求，开发了一种新的YP500 MPa级高强度钢板。通过热机械控制的轧制肛门控制极低碳贝氏体钢的组织，通过Super-OLAC进行控制冷却，以实现通过低PCM的轧制（非热处理）低PCM高屈服点钢的生产。在线过程。所开发的钢满足了所需的机械性能，并且在冷加工后显示出令人满意的韧性，并且在线加热过程后机械性能没有降低。在较小的热输入条件下，例如在敲打电弧的情况下，热影响区（HAT）的最大硬度小于维氏硬度（HV）的280点，显示出极好的焊接硬化性，并且在y型槽焊接裂纹中没有出现裂纹测试，表明焊接不需要预热。对通过电气焊（EGW）和埋弧焊（SAW）制成的对接焊缝的评估也表明，开发的钢板具有良好的可焊性。

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