15MnNbVR压力容器用钢焊接性实验研究.pdf

上半月出版 15MnNbVR压力容器用钢焊接性实验研究 杨国辉-，2．王艾伦1 (1．中南大学机电工程学院，湖南长沙410083；2．湖南工学院机械工程系，湖南衡阳421002) 摘要：针对武钢新研制的压力容器用钢15MnNbVR的焊接性进行了实验研究，采用热影响区最高硬度试验、斜Y 型坡口裂纹试验测试了该钢对冷裂纹的敏感性，进行了焊接线能量对焊接接头力学性能影响、焊后热处理温度对焊接接头 力学性能影响、低温系列冲击、断裂韧性等试验。结果表明，15MnNbVR钢具有优良的焊接性，焊接接头热裂倾向和再热裂 纹敏感性小，焊前预热温度到125℃以上时，产生冷裂纹的可能性较小，低温系列冲击韧性受焊接线能量影响程度不大，具 有与母材相当水平的断裂韧性。该钢是制造高参数压力容器、大型储罐和水电站压力钢管等理想材料。 关键词：15龇VR钢；焊接性；压力容器用钢 中图分类号：TGl42．41；TG406文献标识码：A on ofPressureVesselSteel15MnNbVR Weldability ExperimentalStudy YANGGuohuiL2．、7l，ANGAilunl MechanicalandElectrical ofMechanical (1．Co／／egeof EngineeringofCSU咖h410083，China,2．Department Institute 421 002，China) Engineering,HunanofTechnology,Hengyang iron Cowas Abstract：The of vesselsteel15MnNbVR Wuhanandsteel weldabilitypressure developedby 1 to crackwascarriedout thetestofmaximumhardnessofHAZ ofsteel5MnNbVRcold investigated．Thesensitivity by and crack．The of and treatmentOilthemechanical were effects heat Y—groove weldinginput post-heat properties researched．Theoflow andfracture ofweldedWascarriedout．Theresults experimentstemperatureimpact toughness joint showthat 15MnNbVRhasexcellent weldedhassmall ofthermalcrackand steel weldability．Thejoint tendency sensitivity of crack．Thecoldcrack not when isabove125℃．The heat has appear temperature input reheating may preheat welding