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一、前言 近二十年来,世界不锈钢产量大约增加了五倍,年产量约1200多万吨。其中奥氏体钢的产量约占70～80％(包括日本、美国西欧等国家)。1Cr18Ni9Ti产量仅占奥氏体不锈钢的1～2％。而在我国却占到80％。钢中含钛,难免会增加TiN夹杂,会出现抛光性差、焊接件易呈现刀状腐蚀、粘度大、流动性差等缺陷且对极大地提高不锈钢产量的连铸工艺的采用也是不利的。随着炉外精炼技术的普及,可使钢中的碳含量降到很低的水平,这样再用钛稳定钢中碳已不仅
I. Introduction In the recent two decades, the output of stainless steel in the world has increased by about five times and the annual output has been about 12 million tons. Austenitic steel production accounts for about 70-80% (including Japan, the United States and Western Europe and other countries). 1Cr18Ni9Ti output only accounts for 1 ~ 2% of austenitic stainless steel. In our country it accounts for 80%. Titanium steel, will inevitably increase the TiN inclusions, there will be poor polishing, welding parts prone to knife-like corrosion, viscosity, poor flow and other defects and greatly improve the production of stainless steel continuous casting process is also unfavorable. With the popularity of furnace refining technology, the carbon content in steel can be reduced to a very low level, so re-use titanium to stabilize the carbon steel has not only