摘要
本文针对厚度为40 mm的Q950CF钢板,深入探究其焊接抗裂性。首先运用多种先进仪器设备对母材化学成分展开精准分析,基于分析结果计算碳当量等关键指标,并结合Graville图判断其可焊性,同时借助JmatPro软件模拟母材凝固行为,开展DSC试验探究凝固相变规律,还通过高温金相显微镜观察凝固相变行为。进而按照相关标准测定其焊接CCT曲线,最后依据GB/T 32260.2—2015标准进行铁研试验,系统研究不同预热条件下试件裂纹产生情况,为Q950CF钢板在焊接工程中的应用提供理论及实践支撑。
This paper deeply explores the welding crack resistance of Q950CF steel plate with a thickness of 40 mm.First,a variety of advanced instruments and equipment are used to accurately analyze the chemical composition of the parent material.Key indicators such as carbon equivalent are calculated based on the analysis results.The weldability is evaluated with reference to the Graville diagrams.Additionally,JmatPro software is used to simulate the solidification behaviors of the parent material.DSC tests are performed to explore the law of solidification phase change,and a high-temperature metallographic microscope is used to observe the solidification phase change behaviors.The welding CCT curves are determined according to relevant standards.Finally,slit type cracking tests are carried out according to GB/T 32260.2-2015 to systematically study the crack initiation of specimens under different preheating conditions,providing theoretical and practical support for the application of Q950CF steel plates in welding engineering.
作者
原嘎嘎
YUAN Ga-ga(Electromechanical Installation Branch of Sinohydro Bureau 14 Co.,Ltd.,Kunming 650200,China)
出处
《水电站机电技术》
2025年第11期36-39,136,共5页
Mechanical & Electrical Technique of Hydropower Station
