一、引言众所周知,钢中含有氧化物夹杂特别是点状不变形夹杂对钢的疲劳性能、耐磨性、抛光性、深冲性能十分有害,尤其在交变负荷下工作的钢制品更忌这类夹杂,业已得知这类夹杂主要是铝酸钙、氧化铝、尖晶石,而最有害的是含CaO的铝酸盐。普通碱性炉生产的钢难免不生成这类夹杂。过去为生产不含这类夹杂的钢都用酸性炉生产,瑞典即以其生产的轴承钢冠于各国,又因酸性炉要求原材料苛刻,生产效率低,后来发展了真空脱气和其他二次精炼设备,瑞典也发展了SKF—MR法来代替酸性平炉,都取得了效果。但是要设置这些设备,投资很大,不易普遍地很快采 I. INTRODUCTION It is well known that the inclusion of oxides in steel, especially the point-like non-deformation inclusions, is very harmful to the fatigue properties, abrasion resistance, polishing and deep drawability of steel, especially for steel products working under alternating load. Class inclusions, have been found that such inclusions are mainly calcium aluminate, alumina, spinel, and the most harmful is the CaO-containing aluminate. Ordinary alkaline furnace steel production will inevitably not generate such inclusions. In the past for the production of steel without such inclusions are produced using an acid furnace, that is, Sweden, its production of bearing steel crown in various countries, and because of the acidic furnace demanding raw materials, low production efficiency, and later developed a vacuum degassing and other secondary Refining equipment, Sweden has also developed the SKF-MR method to replace the acid hearth, have achieved results. However, to set up these devices, investment is very large, not easy to adopt generally quickly