插销试验在火电厂管材焊接性评定中的应用

介绍了插销试验的特点 ,并将插销试验与斜Y坡口试验进行了比较 ,指出插销试验方法特别适合于火电厂耐热钢管材的焊接性评定。用插销试验评定了某电厂碳当量偏高的ZG2 0MnMo钢导汽管的冷裂纹敏感性。试验结果表明 :为了避免冷裂纹 ,其预热温度不得低于 2 50℃ ,采用 2 50℃× 1h紧急后热处理 ,预热温度可降低至 1 0 0℃。

相对钢材进展的焊接“三落后”问题及对策

相对现代钢铁冶金理论和钢材性能的巨大而深刻的变化,在30多a或50多a前制定的钢材碳当量计算公式和一些焊接性试验方法,已难以评价现在的钢材,而钢材洁净度和冶金理论及生产技术的创新,已使钢材的性能优于焊缝金属的性能。因此,现在评定钢材"焊接性"的方法已落后于钢材进展,焊缝金属的洁净度和韧性已落后于钢材品质的进步,焊接冶金理论已落后于现代钢铁冶金理论。本文追源溯始,论述了出现以上"三落后"问题的原因和现状,并分别提出了若干对策及建议。

Analysis and evaluation of the stability of the continuously welded rail track

As the modern railway construction continues to mature, now the laying of the continuously welded rail track has become an important part of the construction and development of the modern industry of the railway. The study and evaluation of the stability of the continuously welded rail track will better play the values and roles of the continuously welded rail track. At the same time, through the analysis of the specific factors affecting the stability of the CWR track, especially with the combination of the data simulation, we can thus carry out the more accurate the application of the continuously welded rail track. This paper will explore the construction and application background of the continuously welded rail track, and combine the cognition of the specific factors that affect the stability of the continuously welded rail track, so as to accurately analyze and evaluate the stability of the continuously welded rail track.