论文部分内容阅读
重点考察了Ti合金化过程中影响Ti收得率的主要因素,并对比分析了Ti合金化前后夹杂物的物相变化及夹杂物的去除效果.控制氧活度a[O]<350×10-6,Al、Ti合金加入时间间隔大于3 min,可以保证Ti收得率>85%;当a[O]>350×10-6时,需控制Al、Ti合金加入时间间隔为5 min以上.相同a[O]和[Al]s情况下,延长Al、Ti加入时间间隔可以有效提高Ti收得率.RH处理过程中,钢包内当量直径>200μm的Al2O3夹杂物在5 min内基本可以上浮去除,但相同尺寸的A-Ti-O复合夹杂的去除时间要比Al2O3长1～2 min.Ti合金加入后,Al2O3夹杂物周围会形成Al-Ti-O的复合夹杂,这些夹杂物的形成降低Ti的收得率.
The main factors influencing the yield of Ti during Ti alloying were investigated emphatically and the phase changes of inclusions and the removal of inclusions before and after Ti alloying were analyzed comparatively.Controlling oxygen activity a [O] <350 × 10 -6, Al, Ti alloy is added more than 3 min, the Ti recovery rate can be guaranteed> 85%; when a [O]> 350 × 10-6, the addition time interval of Al and Ti alloy should be above 5 min In the same condition of a [O] and [Al] s, prolonging the addition time interval of Al and Ti can effectively increase the yield of Ti.Al2O3 inclusions with an equivalent diameter> 200μm in the ladle can basically be obtained within 5 min But the same size of A-Ti-O composite inclusions removal time longer than Al2O3 1 ~ 2 min.Ti alloy added, Al2O3 inclusions will be formed around the Al-Ti-O composite inclusions, these inclusions Formation reduces the yield of Ti.