ZHOU Jicheng TIAN Yanwen JIANG Zuoyao YANG Shaowei Shanghai Institute of Metallurgy
,
Academia Sinica
,
Shanghai
,
China.Northeast University of Technology
,
Shenyang
,
China.Jiao Tong University
,
Shanghai
,
China.
材料科学技术（英文）
The activity of MnO in blast furnace-type slags CaO-SiO_2,CaO-SiO_2-Al_2O_3 and CaO-SiO_2-Al_2O_3-MgO at 1500℃ has been measured in a graphite crucible with Ag and Sn as solvent metals.The agreement between the values of γMnO obtained from the experimental results using Ag and Sn separately as the solvent metal is excellent.The major errors in the previous studies have proved to be the failure to take into account the exchange reactions involving Si and Mn and insufficient time for the establishment of equilibrium between slag and solvent metal. A new method is suggested for determining the activities of elements in metallic solutions. The method involves the separate equilibration of two metallic alloys,one of which contains the component of interest at a known activity, with a single slag.
关键词:
blast furnace slag
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LIANG Yong LI Ruiguo Institute of Metal Research
,
Academia Sinica
,
Shenyang 110015
,
ChinaInstitute of Corrosion and Protection of Metals
,
Aademia Sinica
,
Shenyang
,
110015
,
China
材料科学技术（英文）
Recent advances in laser coating technology including laser cladding,laser surface alloying and laser vapour deposition in China are reviewed in this paper.
关键词:
laser
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QIAO Lijie LIU Rui XIAO Jimei University of Science and Technology Beijing
,
Beijing
,
China
金属学报(英文版)
The effects of stress components on nucleation sites and propagation directions of stress cor- rosion cracks in brass were investigated with specimens under mode Ⅱ and mode Ⅲ loadings. The results indicated that under mode Ⅱ loading,stress corrosion cracks nucleated on the site with maximum normal stress component and propagated along the plane perpendieular to the maximum normal stress,under mode Ⅲ loading,the stress corrosion crack was not evident on the 45°plane due to the general corrosion in aqueous solution with high NH_4OH concentra- tion,while stress corroded in aqueous solution with low NH_4OH concentration, numerous cracks with spacings of 10—150μm were found on the 45°plane with maximum normal stress and no stress corrosion cracks was observed on the plane with maximum shear stress.
关键词:
stress corrosion cracking
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