材料期刊网

Measurement of the liquid scintillator nonlinear energy response to electron

ZHANG Fei-Hong , YU Bo-Xiang , HU Wei , YANG Ma-Sheng , CAO Guo-Fu , CAO Jun , ZHOU Li

中国物理C doi:10.1088/1674-1137/39/1/016003

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Measurement of the fluorescence quantum yield of bis-MSB

DING Xue-Feng , WEN Liang-Jian , ZHOU Xiang , DING Ya-Yun , YE Xing-Chen , ZHOU Li , LIU Meng-Chao

中国物理C doi:10.1088/1674-1137/39/12/126001

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Simulation and performance study of ceramic THGEM

YAN Jia-Qing , XIE Yu-Guang , HU Tao , LU Jun-Guang , ZHOU Li , QU Guo-Pu , CAI Xiao

中国物理C doi:10.1088/1674-1137/39/6/066001

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Fatigue Behavior of High Speed Steel Roll Materials for Hot Rolling by Laser Impacting

ZHOU Li , SUN Dale , LIU Changsheng , WU Qiong

钢铁研究学报(英文版)

The fatigue behavior of high speed steel (HSS) roll materials for hot rolling was researched under watercooling conditions by laser impacting. The microstructure of HSS sample and the morphologies of fatigue samples were observed by scanning electron microscope. The phase structure was detected by XRD. The morphology of situ oxide scale was observed by optical microscope, and the expansion coefficient was measured by TGA. The experiment results indicate that the cracks come into being at the carbidematrix interface, but there are no cracks in the matrix after many times of laser impacting treatment, for the situ sample taken from the fractured roll surface, big carbides are more sensitive to the fatigue, and peel off prior to small ones. The relevant fatigue mechanisms are also discussed.

关键词: high speed steel;fatigue;laser impacting;stress concentration;carbide

Slag for Decopperization and Sulphur Control in Molten Steel

WANG Jianjun , GUO Shangxing , ZHOU Li , LI Qiang

钢铁研究学报(英文版)

Decopperization in molten steel with FeSNa2S slag was investigated in the laboratory. It was found that with an increase in FeS content of the FeSNa2S slag, the decopperization ratio increased. The decopperization ratio could reach the maximum of 716% in hot metal. The decopperization ratio was closely related to the carbon content, and the higher the carbon content, the higher was the decopperization ratio. Sulphur addition was found in the process of decopperization, and the increase in sulphur content of molten steel was about 02%-042%. However, by adding 30%-50% of BaO to the FeSNa2S slag, the addition of sulfur content in molten steel could be reduced by about 50%. The finer slag system composition was FeS∶Na2S∶BaO=40∶20∶40.

关键词: molten steel;decopperization;FeS