材料期刊网

超纯铁素体不锈钢因碳、氮含量极低，较普通铁素体不锈钢拥有更优越的耐腐蚀性、韧性及焊接性，近半个世纪得到了大力发展和广泛应用。对于超纯铁素体不锈钢冶炼的核心环节—?恍飧志叮紫炔隽顺烤换⒏呓嗑换⒏咝榷ɑ刂频纫幌盗芯都际跄训悖浯未泳吨魈迳璞赣牍ひ占际跻约案ㄖ际醯确矫嫦低辰樯芰顺刻靥宀恍飧志都际醯慕胶头⒄梗詈蠖猿刻靥宀恍飧志都际醯奈蠢锤镄潞头⒄狗较蚪辛艘恍┱雇?

Ultra pure ferritic stainless steel has more advantages in the performance than the ordinary ferritic stainless steel because of ultra low carbon and nitrogen content, such as corrosion resistance, toughness and weldability etc. Such steel has therefore been applied in many fields, leading to the very rapid development over the past 50 years. The secondary refining process could be seen the most important step of the whole steel-making process for the ultra pure ferritic stainless. Firstly, some difficulties in the secondary refining were described, including the refining control of ultra purification in terms of carbon and nitrogen contents, high cleanness, stability with high efficiency. Secondly, the development and progress of the secondary refining technology for ultra pure ferritic stainless was introduced in terms of the refining equipments, metallurgical process and assistant technologies. Finally, the prospect on the development of secondary refining process was presented for ultra pure ferritic stainless in the future.