【摘要】：采用部分再結晶區(qū)加速冷卻的方法獲得了X100抗大變形管線鋼,利用焊接熱模擬技術制備了不同熱影響區(qū)試樣并研究了其沖擊功和顯微組織。結果表明:X100抗大變形管線鋼具有較強的極限應變能力,其組織為粒狀貝氏體和多邊形鐵素體;模擬熱影響區(qū)試樣的沖擊功隨熱循環(huán)峰值溫度的升高而下降,當峰值溫度為1 300℃時,沖擊功為247.9J,比母材的降低了17.3%,沖擊斷裂方式也從韌性斷裂轉為解理斷裂;熱循環(huán)峰值溫度升高使熱影響區(qū)組織發(fā)生再結晶,并且晶粒粗化,降低了其韌性。
[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，

本文編號：2503371