铝对含钛微合金钢成分控制及夹杂物形成的影响

自主设计了不同Al含量的含钛微合金钢，采用火花源光电直读光谱仪检测了每炉钢的化学成分，分析了Al含量对试验钢中O和Ti含量的影响规律；利用OM、SEM观察了试验钢夹杂物形貌并进行了能谱分析，研究了Al含量对试验钢夹杂物形成的影响规律。研究结果表明：随着Al含量的增加，钢中Ti氧化物夹杂逐渐减少，Ti主要以TiN及TiC的形式存在，收得率得到提高；当Al质量分数大于0.033 7%时，Ti的收得率均高于90%；当Al质量分数控制在0.033 7%~0.060 6%时，脱氧效果较好，并可降低夹杂物数量、减小夹杂物的尺寸。

Effect of aluminum on composition control and inclusion formation of microalloyed steel containing titanium

Microalloyed steels containing titanium with different Al contents were designed independently, and the chemical composition of each furnace steel was detected by spark source photoelectric direct reading spectrometer. The influence of Al, O and Ti contents in the tested steel was analyzed. Optical microscope (OM) and scanning electron microscope (SEM) were used to observe the morphology of inclusions, and energy spectrum analysis was carried out to study the influence of Al content on the formation of inclusions. The results show that with the increase of Al content, Ti oxide inclusions in steel gradually decrease.Ti mainly exists in the form of TiN and TiC, and the rendimiento of Ti was increased. When Al content was higher than 0.033 7%, the rendimiento of Ti was higher than 90%.When the Al content was controlled at 0.033 7%-0.060 6%, the de-oxidation effect was good, and the number and size of inclusions were reduced.