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1.前言自七十年代末八十年代初,国外一些发达国家如德国、意大利、法国、日本和美国等兴起一种简单易行而又行之有效的炉外精炼技术—合金芯线技术。我所自1983年开始了这项技术的研究,并相继开发研制了合金芯线的成型设备—包芯机及往钢水中加入这种合金芯绒的喂线机。我国许多钢厂已采用了该设备,通过往钢包中加入实芯铝线、稀土和合金芯线,达到脱S、脱O、改变钢中夹杂物形态、提高钢质量的目的。众所周知,铝是对钢的终脱氧,晶粒度、夹杂物和时效特性有重大影响的金属元素。然而,在连铸生产
1. Introduction Since the late seventies and early eighties, some developed countries such as Germany, Italy, France, Japan and the United States emerged a simple and effective outside refining technology - alloy core technology. Since 1983, I have started the research of this technology, and have successively developed the forming equipment of alloy core wire - the core-making machine and the wire feeder which adds this alloy cord into the molten steel. Many steel mills in our country have adopted the equipment, by adding solid aluminum wire, rare earth and alloy core wire to the ladle to achieve the purpose of removing S and removing O, changing the shape of inclusions in the steel and improving the steel quality. It is well-known that aluminum is a metal element that has a significant effect on the ultimate deoxidation, grain size, inclusions and aging properties of the steel. However, in continuous casting production