公开(公告)号：US20130152740A1

公开(公告)日：2013-06-20

申请号：US13606500

申请日：2012-09-07

申请人： Weng-Sing Hwang ,  Jian-Xun Fu ,  Yen-Hao Su ,  Muh-Jung Lu

发明人： Weng-Sing Hwang ,  Jian-Xun Fu ,  Yen-Hao Su ,  Muh-Jung Lu

IPC分类号： C21C7/064 ,  C21C7/06

CPC分类号： C21C7/06 ,  C21C7/064

摘要： A metallurgical method for refining grains of steel includes adding aluminum into molten steel obtained from a secondary refining process. Aluminum reacts with oxygen and sulfur in the molten steel to reduce the total oxygen content in the molten steel to 15-120 ppm, to reduce a sulfur content in the molten steel to 15-150 ppm, and to produce aluminum oxide, obtaining cleaner molten steel. Magnesium is added into the cleaner molten steel and reacts with oxygen, sulfur, and aluminum oxide in the cleaner molten steel to reduce the total oxygen content in the molten steel to 10-60 ppm, to reduce the sulfur content in the molten steel to 5-100 ppm, and to produce inclusions including magnesium oxide, magnesium sulfide, and magnesium-aluminum spinel. Precipitates of the inclusions can serve as crystalline cores in a subsequent crystallization process to obtain fine-grained steel.

摘要翻译： 用于精炼钢的晶粒的冶金方法包括将铝加入从二次精炼工艺获得的钢水中。 铝与钢水中的氧和硫反应，将钢水中的总氧含量降至15-120ppm，将钢水中的硫含量降低至15-150ppm，生成氧化铝，得到更清洁的熔融 钢。 将镁加入到清洁的钢水中，并与清洁钢水中的氧，硫和氧化铝反应，将钢水中的总氧含量降至10-60ppm，将钢水中的硫含量降至5 -100ppm，并且产生包括氧化镁，硫化镁和镁 - 铝尖晶石的夹杂物。 在随后的结晶过程中，夹杂物的析出物可以用作晶核，以获得细晶粒的钢。