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on the idea of core scale logging, by comprehensively analyzing the lithology, physical properties and fracture development characteristics of coal seam roof and floor using logging data, the five evaluation.... The comprehensive evaluation model of sealing ability of coal seam roof and floor was established, and the calculated evaluation indexes were used to quantitatively evaluate the sealing ability of coal......
J. Cent. South Univ. (2020) 27: 1224-1234 DOI: https://doi.org/10.1007/s11771-020-4362-6 Corrosion behavior and electrochemical property of Q235A steel in treated water containing halide ions (F... of Q235A steel. Key words: simulated water; halide anions (F-, Cl-); Q235A steel; corrosion behavior; electrochemical property Cite this article as: WANG Yun-yan, LUO Yong-jian, XU Hui, XIAO Hai-juan......
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Sound insulation property of Al-Si closed-cell aluminum foam bare board material YU Hai-jun(尉海军)1, YAO Guang-chun(姚广春)1, WANG Xiao-lin(王晓林)2, LI Bing(李 兵)1, YIN Yao(尹 銚)2, LIU Ke(刘 克)2 1. School...). It is found that sound reduction index(R) is small under low frequencies, large under high frequencies and is controlled by different mechanisms. The sound insulation property basically conforms......
reduction index (Rw) is gotten to be about 43 dB according to international evaluation criterion of sound insulation material [20]. 4 Conclusions 1) The sound absorption property of closed-cell... Sound absorption and insulation property of closed-cell aluminum foam YU Hai-jun(尉海军)1, LI Bing(李 兵)1, YAO Guang-chun(姚广春)1, WANG Xiao-lin(王晓林)2, LUO Hong-jie(罗洪杰)1, LIU Yi-han(刘宜汉)1 1......
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MICROSTRUCTURE EVALUATION OF SEMI-SOLID STEELMATERIALS IN ROLLING PROCESS AND THERESULTING MECHANICAL PROPERTIES W.M.Mao1,R.B.Song1,A.M.Zhao1,J.L.Sun1,Y.L.Kang1 (1.School of Materials Science... temperature. The globular solid particles don''t present plastic deformation unless high solid fraction. At the same time, the mechanics property of workpiece is pretty good while the semi-solid slurry......
J. Cent. South Univ. (2018) 25: 1306-1316 DOI: https://doi.org/10.1007/s11771-018-3827-3 Surface property variations in flotation performance of calcite particles under different grinding patterns... patterns, which is the main cause of the flotation performance variation. Key words: calcite; surface property; grinding patterns; high-pressure grinding rolls; flotation performance Cite this article......
钢材含碳量电磁无损检测方法孙亚飞1,李力1(1.广东省珠海市广东科学技术职业学院机械与电子工程学院)摘 要:钢材含碳量在线无损检测技术在钢铁工业精确过程控制中起着至关重要的作用.电磁方法广泛应用于离线钢材含碳量的无损检测,但多数传统方法只是利用了电磁特性对含碳量敏感的特点,而忽视了电磁特性对温度敏感的特点.最近,利用电磁计算技术的多物理场软测量方法克服了这一缺点,取得了良好的效果.本文介绍采用涡流法,Barkhausen噪声法,宏观磁性能法和感应加热法4种钢铁材料中含碳量电磁无损检测方法的基本原理,阐述它们的研......