CAJ | 학술논문

采用理论分析结合生产经验的方法，确定马钢特钢GCr15轴承钢的精炼渣组分、钢中[ Ti]和[ N]含量上限以及真空循环时间和浇铸前软吹时间等关键工艺参数，实现对钢中非金属夹杂物的有效控制，成功试制了 T[ O]＜5ppm、D类夹杂评级≤1．0级和DS类夹杂物≤1．0级的高品质GCr15轴承钢。由于凝固偏析的作用，在[ Ti]和[ N]含量较低的条件下，不能避免凝固过程中析出TiN类夹杂。
채용이론분석결합생산경험적방법，학정마강특강GCr15축승강적정련사조분、강중[ Ti]화[ N]함량상한이급진공순배시간화요주전연취시간등관건공예삼수，실현대강중비금속협잡물적유효공제，성공시제료 T[ O]＜5ppm、D류협잡평급≤1．0급화DS류협잡물≤1．0급적고품질GCr15축승강。유우응고편석적작용，재[ Ti]화[ N]함량교저적조건하，불능피면응고과정중석출TiN류협잡。
The key process parameters for bearing steel GCr15 of Masteel was formulated such as the composition of refining slag, upper limit of [ Ti] and [ N] in liquid steel, cycling time in vacuum, time of soft blowing before casting and so on.The non-metal inclusion was controlled effectively.The high quality bearing steel was trial-produced successfully, quality standard of which follow as:T[ O]<5ppm, D-inclusions rating≤1.0, DS-inclusions rating≤0.5.As the effect of segregation, inclu-sion of TiN was separated out inevitably during solidification, when the content of [ Ti] and [ N] was lower.