X100抗大变形管线钢焊接热影响区的显微组织与冲击功
发布时间：2019-06-20 16:43
【摘要】：采用部分再结晶区加速冷却的方法获得了X100抗大变形管线钢,利用焊接热模拟技术制备了不同热影响区试样并研究了其冲击功和显微组织。结果表明:X100抗大变形管线钢具有较强的极限应变能力,其组织为粒状贝氏体和多边形铁素体;模拟热影响区试样的冲击功随热循环峰值温度的升高而下降,当峰值温度为1 300℃时,冲击功为247.9J,比母材的降低了17.3%,冲击断裂方式也从韧性断裂转为解理断裂;热循环峰值温度升高使热影响区组织发生再结晶,并且晶粒粗化,降低了其韧性。
[Abstract]:In this paper, X100 anti-deformation pipeline steel was obtained by means of accelerated cooling of partial recrystallization zone, and different heat-affected zone samples were prepared by welding thermal simulation technique and its impact and microstructure were studied. The results show that the X100 anti-deformation pipeline steel has strong ultimate strain capacity, and its structure is granular bainite and polygonal ferrite. The impact power of the sample in the simulated heat affected zone decreases with the increase of the peak temperature of the thermal cycle, and when the peak temperature is 1 300 鈩，
本文编号：2503371
[Abstract]:In this paper, X100 anti-deformation pipeline steel was obtained by means of accelerated cooling of partial recrystallization zone, and different heat-affected zone samples were prepared by welding thermal simulation technique and its impact and microstructure were studied. The results show that the X100 anti-deformation pipeline steel has strong ultimate strain capacity, and its structure is granular bainite and polygonal ferrite. The impact power of the sample in the simulated heat affected zone decreases with the increase of the peak temperature of the thermal cycle, and when the peak temperature is 1 300 鈩，
本文编号：2503371
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