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Effect of Chemical Composition on Oxide Transformation and MnS Precipitation Upon Oxide Particles in Fe-Cr Alloy by Heat Treatment

机译:热处理对化学成分对Fe-Cr合金中氧化物颗粒氧化物转变和MnS析出的影响

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摘要

The transformation of nonmetallic inclusions and the change of MnS precipitation ratio on oxide particles during heat treatment were studied by using Fe-10%Cr alloy containing different Si and S content in the present study. The phenomenon of oxide transformation in alloy in this research was characterized according to Si content. When the Si content was lower, the typical inclusions changed from MnO ? SiO2 type to MnO·Cr2O3 type by heat treatment. In the case of high S concentration, the obvious MnS area in inclusions was observed after heat treatment. It was more favorable for MnS precipitation as the S content was improved from approximately 20×l 0'6 to 60×10'6. The MnS precipitation ratio on oxide particles was higher on MnO· SiO2 type than MnO-Cr2O3 type oxide particles. Besides, the ratio on the two kinds of oxides increased with increasing the time for heat treatment at 1473K as a whole. The theoretical Mn content at which MnS can precipitate agrees well with the experimental results.
机译:利用含Si和S含量不同的Fe-10%Cr合金,研究了热处理过程中非金属夹杂物的转变以及MnS在氧化物颗粒上的析出率的变化。根据Si含量对合金中氧化物的转变现象进行了表征。当Si含量较低时,典型的夹杂物由MnO 2变为MnO 2。通过热处理将SiO2型转变为MnO·Cr2O3型。在高S浓度的情况下,热处理后观察到夹杂物中有明显的MnS面积。由于S含量从大约20×l 0'6提高到60×10'6,因此对于MnS沉淀更为有利。 MnO·SiO2型氧化物上的MnS析出率高于MnO-Cr2O3型氧化物。另外,两种氧化物的比例总体上随着热处理时间的增加而增加,为1473K。 MnS析出的理论Mn含量与实验结果吻合良好。

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