TN366 2001064097激光粒度仪光电探测器自动对中系统=Automaticcentering systems of photodetector in laser particlesize analyzers[刊,中]/张晓辉,陈兴梧(天津大学精仪学院.天津(300072))∥2000年青年光学学术讨论会暨院士报告会....TN366 2001064097激光粒度仪光电探测器自动对中系统=Automaticcentering systems of photodetector in laser particlesize analyzers[刊,中]/张晓辉,陈兴梧(天津大学精仪学院.天津(300072))∥2000年青年光学学术讨论会暨院士报告会.—广东深圳,2000.10.展开更多
The distribution and characteristics of nonmetallic micro-inclusions of GCr15 bearing steel were explored through metallographic area method in virtue of tracer method and electronic microscope.The results show that t...The distribution and characteristics of nonmetallic micro-inclusions of GCr15 bearing steel were explored through metallographic area method in virtue of tracer method and electronic microscope.The results show that the micro-inclusions,of which the average value is 0.032%,are mainly the compounds formed via the adsorption/aggregation of multielement deoxidized compounds and secondarily deoxidized products on tundish liquid level.The micro-inclusions of diameters from 0 to 5 μm are 92.5% in total,which basically determines the characteristics of inclusions distribution in casting slab.The inclusions of diameters more than 10 μm only account for less than 1% in total,which have little influence on steel quality.The relationship between equilibrium compositions of the first deoxidation products and molten steel compositions was also calculated based on thermodynamic theory.展开更多
文摘TN366 2001064097激光粒度仪光电探测器自动对中系统=Automaticcentering systems of photodetector in laser particlesize analyzers[刊,中]/张晓辉,陈兴梧(天津大学精仪学院.天津(300072))∥2000年青年光学学术讨论会暨院士报告会.—广东深圳,2000.10.
基金Supported by Natural Science Foundation of Hebei Province (No.502265)
文摘The distribution and characteristics of nonmetallic micro-inclusions of GCr15 bearing steel were explored through metallographic area method in virtue of tracer method and electronic microscope.The results show that the micro-inclusions,of which the average value is 0.032%,are mainly the compounds formed via the adsorption/aggregation of multielement deoxidized compounds and secondarily deoxidized products on tundish liquid level.The micro-inclusions of diameters from 0 to 5 μm are 92.5% in total,which basically determines the characteristics of inclusions distribution in casting slab.The inclusions of diameters more than 10 μm only account for less than 1% in total,which have little influence on steel quality.The relationship between equilibrium compositions of the first deoxidation products and molten steel compositions was also calculated based on thermodynamic theory.
