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通过热力学计算及试验分析,系统研究了不同含量的Ti对Si-Mn脱氧FeNi42合金中夹杂物数量、组成、形貌和尺寸分布的影响,利用扫描电镜和图像分析仪对试样中的夹杂物进行了检测。结果表明,当合金中钛含量较低时,夹杂物的中心部分是析出温度较高的Al-Ti-Mn复合氧化物,向外依次是锰硅酸盐和少量的MnS。随着钛含量的增加,夹杂物中钛含量逐渐增多,而Mn、Si等元素的含量逐渐减小。Ti的加入使合金中夹杂物的数量增多,尺寸减小,且呈均匀弥散分布。
Through the thermodynamic calculation and experimental analysis, the influence of different content of Ti on the number, composition, morphology and size distribution of inclusions in Si-Mn deoxidized FeNi42 alloy was systematically investigated. The inclusions in the sample were analyzed by SEM and image analyzer Tested. The results show that when the content of titanium in alloy is low, the center of inclusions is Al-Ti-Mn composite oxide with higher precipitation temperature, followed by manganese silicate and a small amount of MnS. With the increase of titanium content, the content of titanium in inclusions gradually increased, while the content of Mn, Si and other elements gradually decreased. The addition of Ti increases the number of inclusions in the alloy, decreases in size and uniformly disperses.