基于原位观察的H13钢中液析碳化物高温行为研究

发布时间：2018-05-19 00:09

  本文选题：液析碳化物 + 显微偏析　； 参考：《工程科学学报》2017年08期

【摘要】：使用原位观察方法研究了不同凝固条件H13钢铸锭样品中液析碳化物的高温行为.实验发现连铸锭及电渣锭两种样品在所研究的枝晶间存在明显的合金元素偏析,其中Cr、Mo、V、C的偏析较为明显,液析碳化物存在于凝固枝晶间偏析最严重的区域,成分为V、Mo、Cr、Ti的液析碳化物.连铸锭及电渣锭两种样品分别在1200℃及1250℃围绕液析碳化物周围出现局部液相,理论计算的局部液相出现温度与实验观察到的接近;随着温度的升高,局部液相范围扩大,与电渣锭相比,加热至相同温度时,连铸锭液析碳化物周围的局部液相范围更大.液析碳化物周围局部液相的出现加快了枝晶间合金元素的扩散,对液析碳化物的高温行为具有重要影响.
[Abstract]:In situ observation method was used to study the high temperature behavior of liquid carbides in ingot samples of H13 steel under different solidification conditions. It was found that the alloy element segregation was obvious between the dendrite and the electroslag ingot. The segregation of Cr _ (Mo) O _ (V) C was obvious, and the liquid carbide existed in the region where the segregation between the dendrites was the most serious. The composition is the liquid carbides of V _ (Mo) Mo _ (Cr) Ti. Two kinds of samples, continuous ingot and electroslag ingot, appeared local liquid phase around 1200 鈩，

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