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首页> 外文期刊>ISIJ international >Effect of Shear Stress on Heat Transfer Behavior of Non-Newtonian Mold Fluxes for Peritectic Steels Slab Casting
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Effect of Shear Stress on Heat Transfer Behavior of Non-Newtonian Mold Fluxes for Peritectic Steels Slab Casting

机译：剪切应力对晶钢砌块铸造非牛顿霉菌助熔剂传热行为的影响

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摘要

A new mold flux based on non-Newtonian fluid for the peritectic steels casting was prepared. The heat transfer behavior and lubrication property of this non-Newtonian mold flux were examined by heat flux simulator, ultraviolet-visible-near-infrared spectrometer (UV-Vis/NIR), Raman spectroscopy, SEM, and confo-cal laser scanning microscopy (CLSM), and the results were compared with the conventional mold flux used in peritectic steels casting. The results showed that the heat transfer property of liquid layer of N1 slag was reduced through the destruction of silicate network structure by shear stress. Compared with the data obtained under static and stirring conditions, the q_(max) and degree of polymerization (DOP) of N1 slag were reduced from 0.921 MW/m~2, 0.728 to 0.716 MW/m~2, 0.583, respectively. However, the shear stress has no effect on the heat transfer property of liquid layer of N0 slag. Second, the heat transfer properties of solid slag layer of N0 and N1 slag were all inhibited through increasing the crystallization rate, crystallization fraction, and slag film thickness by shear stress. While, under stirring condition, the slag film thickness and t_2 of N1 slag was lower than that of N0 slag. Third, the heat transfer behavior of air gap layer of N0 and N1 slag were all controlled by shear stress. The surface roughness (Ra) and shedding time of N0 and N1 slag with agitation were increased to 54.49 um, 61 s and 52.87 um, 59 s, respectively. Finally, the break temperature of N1 slag was 9 K lower than that of N0 slag.
机译：制备了基于非牛顿液体用于覆膜铸造的新型霉菌。通过热通量模拟器，紫外 - 可见近红外光谱仪（UV-VIS / NIR），拉曼光谱，SEM和CONFO-CAL激光扫描显微镜检查该非牛顿霉菌通量的传热行为和润滑性能CLSM），并将结果与​​晶钢铸造中使用的常规模具通量进行比较。结果表明，通过剪切应力破坏硅酸盐网络结构的液体层的液体层的传热性。与静态和搅拌条件下获得的数据相比，N1渣的Q_（最大）和聚合（DOP）分别从0.921mW / m〜2，0.728至0.716mW / m〜2,0.583中减少。然而，剪切应力对N0炉渣的液体层的传热性没有影响。其次，通过通过剪切应力增加结晶速率，结晶馏分和渣膜厚度，全部抑制了N0和N1渣的固体渣层的传热性质。虽然在搅拌条件下，N1渣的炉渣膜厚度和T_2低于N0渣的熔渣膜厚度和T_2。第三，通过剪切应力来控制N0和N1渣的气隙层的传热行为。 N0和N1炉渣的表面粗糙度（RA）和脱落时间伴搅拌至54.49μm，61秒和52.87μm，59s。最后，N1炉渣的断裂温度比N0渣的5 k。

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  • 来源
    《ISIJ international》 |2020年第6期|1179-1187|共9页
  • 作者

    Shaopeng GU; Guanghua WEN; Junli GUO; Zhe WANG; Ping TANG; Qiang LIU;

  • 作者单位

    College of Materials Science and Engineering Chongqing University Chongqing 400044 P. R. China Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials Chongqing University Chongqing 400044 P. R. China;

    College of Materials Science and Engineering Chongqing University Chongqing 400044 P. R. China Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials Chongqing University Chongqing 400044 P. R. China;

    College of Materials Science and Engineering Chongqing University Chongqing 400044 P. R. China Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials Chongqing University Chongqing 400044 P. R. China;

    College of Materials Science and Engineering Chongqing University Chongqing 400044 P. R. China Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials Chongqing University Chongqing 400044 P. R. China;

    College of Materials Science and Engineering Chongqing University Chongqing 400044 P. R. China Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials Chongqing University Chongqing 400044 P. R. China;

    College of Materials Science and Engineering Chongqing University Chongqing 400044 P. R. China Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials Chongqing University Chongqing 400044 P. R. China The State Key Laboratory of Mechanical Transmission College of Materials Science and Engineering Chongqing University Chongqing 400044 P. R. China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    non-Newtonian slag; heat transfer performance; shear stress; peritectic steels casting; crystallization;

    机译：非牛顿渣;传热性能;剪切应力;涂钢铸造;结晶;

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