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CN106756498A 一种在大线能量焊接用钢中添加镁的方法 有权

一种在大线能量焊接用钢中添加镁的方法
摘要：
一种在大线能量焊接用钢中添加镁的方法，属于焊接钢技术领域。连铸前分别在中间包中或者结晶器内喂入Mg‑Si‑Fe合金丝，所述的合金丝中的Mg‑Si‑Fe合金质量占Mg‑Si‑Fe合金质量与外皮质量之和的百分数为10‑50％。所述的Mg‑Si‑Fe合金中的Mg质量百分数为10‑45％，Si质量百分数为10‑50％，余量为Fe及不可避免的杂质。所述合金丝中的Mg‑Si‑Fe为高温化学反应生成的合金颗粒，粒度为0‑3mm。所述Mg‑Si‑Fe合金丝的加入量需要和中间包或结晶器的过钢量相匹配，合金丝的Mg和钢的质量百分比为0.0005％‑0.005％。所述Mg‑Si‑Fe合金丝在中间包的喂入速度为15‑60m/min，在结晶器内的喂入速度为15‑90m/min。优点在于，镁收得率高，生产成本低，操作工艺简单。
摘要（英）：

The invention discloses a method for adding magnesium in steel for large-linear-energy welding and belongs to the technical field of welded steel. Before continuous casting, Mg-Si-Fe alloy wires are fed into a tundish or a crystallizer, and the Mg-Si-Fe alloy mass in the alloy wires accounts for 10-50% of the sum of the Mg-Si-Fe alloy mass and the sheath mass. The mass percentage of Mg in a Mg-Si-Fe alloy is 10-45%, the mass percentage of Si in the Mg-Si-Fe alloy is 10-50%, and the balance is Fe and inevitable impurities. Mg-Si-Fe in the alloy wires is alloy particles generated through a high temperature chemical reaction, and the particle size is 0-3 mm. The adding amount of the Mg-Si-Fe alloy wires needs to be matched with the total amount of steel of the tundish or the crystallizer, the mass percentage of Mg of the alloy wires and steel is 0.0005%-0.005%. The feeding-in speed of the Mg-Si-Fe alloy wires in the tundish is 15-60 m/min, and the feeding-in speed of the Mg-Si-Fe alloy wires in the crystallizer is 15-90 m/min. The method has the beneficial effects of being high in magnesium yield, low in production cost and simple in operation process.

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