Acicular ferrite nucleation mechanism in laser-MAG hybrid welds of X100 pipeline steel

Acicular ferrite nucleation mechanism in laser-MAG hybrid welds of X100 pipeline steel
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X100管线钢激光-MAG复合焊缝针状铁素体形核机制

DOI:
10.1016/j.matlet.2021.130603
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发表时间:
2021-12
期刊:
影响因子:
3
通讯作者:
Long Chen
Long Chen
中科院分区:
材料科学3区
文献类型:
--
作者:
Xiaonan Qi;Xiaonan Wang;Hongshuang Di;Xinjunshen;Pengcheng Huan;Jingrui He;Long Chen

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研究了X100管线钢激光-MAG复合焊接过程中针状铁素体的形核机理。结果表明,焊缝中的夹杂物主要由Ti 2 O3和Al 2 O3组成,它们诱导针状铁素体形核。在包裹体附近存在贫锰区。因此,X100管线钢激光-MAG复合焊接中针状铁素体的形核机制为MDZ机制。此外,夹杂物应包含高摩尔分数的Ti 2 O3,以形成MDZ,从而诱导针状铁素体形核。
Acicular ferrite nucleation mechanism in laser-MAG hybrid welding of X100 pipeline steel is studied in this paper. The experimental results show that the inclusions are mainly composed of Ti2O3and Al2O3in the weld, which induce the nucleation of acicular ferrite. There is Mn-depleted zone (MDZ) near the inclusions. Therefore, MDZ mechanism is responsible for the acicular ferrite nucleation in the laser-MAG hybrid weld of X100 pipeline steel. In addition, inclusions should contain a high mole fraction of Ti2O3in order to form MDZ and consequentially induce acicular ferrite nucleation.
二次峰值温度对激光电弧复合焊接X100管线钢接头ICCGHAZ组织和韧性的影响
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