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首页> 外文期刊>ISIJ international >Improved Slags for ESR Processing of High-Carbon Chromium Bearing Steel
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Improved Slags for ESR Processing of High-Carbon Chromium Bearing Steel

机译：用于高碳铬轴承钢的ESR处理的改进渣

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Freckles severely affect the quality of high-carbon chromium bearing steel ingots produced by electro-slag remelting (ESR). With conventional slags, reducing the melt rate of the electrode can prevent freckle formation, but severe surface defects can still occur. In order to design an appropriate slag for control of segregation and also improve the surface quality of the ingots, the melting temperature, heat transfer properties, and viscosity of several synthetic slags based on the system CaF_(2)–CaO–Al_(2)O_(3)–MgO were evaluated. As a consequence of the laboratory investigation, a slag with 50% CaF_(2) and a CaO/Al_(2)O_(3) ratio of 1.5, was selected as a candidate for validation on ESR production facilities based on the following package of attractive properties: low melting temperature, low break temperature, low viscosity and high thermal conductivity. Following evaluation of the selected slag formulation on full-scale plant trials, HSLA steel ingots were produced that were free from freckles and exhibited good surface quality.
机译：雀斑会严重影响通过电渣重熔（ESR）生产的高碳铬轴承钢锭的质量。对于传统的炉渣，降低电极的熔化速率可以防止形成雀斑，但是仍然会出现严重的表面缺陷。为了设计合适的炉渣以控制偏析，并改善铸锭的表面质量，熔融温度，传热性能和基于CaF_（2）–CaO–Al_（2）系统的几种合成炉渣的粘度评估了O_（3）–MgO。作为实验室研究的结果，基于以下软件包，选择了具有50％CaF_（2）和CaO / Al_（2）O_（3）比为1.5的炉渣作为ESR生产设备验证的候选材料。吸引人的特性：低熔点，低断裂温度，低粘度和高导热性。在全面的工厂试验中对选定的矿渣配方进行评估后，生产出不含雀斑且具有良好表面质量的HSLA钢锭。

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