The effects of Mg addition on the formation of nonmetallic inclusions and solidification structure of Ti-sta- bilized ultra-pure ferritie stainless steels were investigated by experimentally casting ingots with differ...The effects of Mg addition on the formation of nonmetallic inclusions and solidification structure of Ti-sta- bilized ultra-pure ferritie stainless steels were investigated by experimentally casting ingots with different composi tions. Thermodynamic analyses on the formation of complex inclusions after adding Mg into steels were carried out combined with the scanning electron microscopy energy dispersive spectrometry （SEM EDS） analysis. And the EDS analysis showed that in steel samples with Mg addition, a new spinel crystal phase combined with AI2O3- TiOx formed. It was also found that after Mg addition, the proportions of equiaxed grain zone of 409L, 4003, 439 and 443NT steels increased from 10.2%, 21.8%, 13.4% and 18.6% to 84.3%, 92.3%, 91.1% and 100.0%, respec tively. Since the planar disregistry between spinel and TiN is 5. 1%0, spinel could promote the precipitation of TiN and increase the number density of TiN inclusions in steel melts. The mechanism of solidification structure refinement after adding Mg into steels supposed that the complex inclusions of spinel and TiN in high number density enhanced columnar-to-equiaxed transition, since the planer disregistry between δ phase and spinel is 1.4 %.展开更多
随着现代医疗事业的发展,对医院信息化程度的要求越来越高。提出一种基于三层C/S结构的医院信息系统设计方案,结合某医院的具体情况,设计出各子系统,并将医院的各种医疗信息和管理信息纳入到统一的信息化平台中。系统采用PowerBuilder和...随着现代医疗事业的发展,对医院信息化程度的要求越来越高。提出一种基于三层C/S结构的医院信息系统设计方案,结合某医院的具体情况,设计出各子系统,并将医院的各种医疗信息和管理信息纳入到统一的信息化平台中。系统采用PowerBuilder和SQL Server 2000数据库进行开发。运行结果表明,该设计加强了医院的管理,方便了患者的就医,提高了工作效率,对医院的发展起到了很大的促进作用。展开更多
文摘The effects of Mg addition on the formation of nonmetallic inclusions and solidification structure of Ti-sta- bilized ultra-pure ferritie stainless steels were investigated by experimentally casting ingots with different composi tions. Thermodynamic analyses on the formation of complex inclusions after adding Mg into steels were carried out combined with the scanning electron microscopy energy dispersive spectrometry （SEM EDS） analysis. And the EDS analysis showed that in steel samples with Mg addition, a new spinel crystal phase combined with AI2O3- TiOx formed. It was also found that after Mg addition, the proportions of equiaxed grain zone of 409L, 4003, 439 and 443NT steels increased from 10.2%, 21.8%, 13.4% and 18.6% to 84.3%, 92.3%, 91.1% and 100.0%, respec tively. Since the planar disregistry between spinel and TiN is 5. 1%0, spinel could promote the precipitation of TiN and increase the number density of TiN inclusions in steel melts. The mechanism of solidification structure refinement after adding Mg into steels supposed that the complex inclusions of spinel and TiN in high number density enhanced columnar-to-equiaxed transition, since the planer disregistry between δ phase and spinel is 1.4 %.
文摘随着现代医疗事业的发展,对医院信息化程度的要求越来越高。提出一种基于三层C/S结构的医院信息系统设计方案,结合某医院的具体情况,设计出各子系统,并将医院的各种医疗信息和管理信息纳入到统一的信息化平台中。系统采用PowerBuilder和SQL Server 2000数据库进行开发。运行结果表明,该设计加强了医院的管理,方便了患者的就医,提高了工作效率,对医院的发展起到了很大的促进作用。
