WANG Hongming
,
LI Guirong
,
DING Zhentao
,
DAI Qixun
,
LI Bo
钢铁研究学报(英文版)
To avoid slag sticking on the ladle immersion cover during the LATS refining and alloying process, the effect of Al2O3 on the melting point of the ladle slag was studied and the additives including CaF2, B2O3, Li2O, and CaO were used to decrease the melting point of the ladle slag. The melting point was measured using the hemisphere method. The results show that the addition of Al2O3 to the ladle slag increases the melting point. The fluxing action is not remarkable if only CaF2 or CaO is used as the additive. The fluxing action of the composite additive obtained by the mixing of CaO and CaF2 in the mass proportion of wCaO∶wCaF2=2∶1 is preferred. The fluxing action of B2O3 is also notable. When the B2O3 content in mass percent is in the range from 2% to 10%, the corresponding melting point is 1 380 ℃ to 1 290 ℃. The fluxing action of Li2O is the most remarkable. When the Li2O content is up to 5%, the melting point of the slag is lower than 1 300 ℃.
关键词:
LATS refining;ladle slag;melting point;additive;immersion cover
LI Guirong
,
WANG Hongming
,
DAI Qixun
,
ZHAO Yutao
,
LI Jingsheng
钢铁研究学报(英文版)
The flux agents in common mould fluxes were fluoride and sodium oxide, which would do great harm to environments. B2O3 was selected as flux. The physical properties of B2O3containing mould fluxes were studied. The corresponding physical properties of 3791%CaO4309%SiO25%Al2O35%MgO2%Li2O7%B2O3 mould fluxes were as follows: the melting point was 909 ℃, the flowing temperature was 1 160 ℃, the viscosity and surface tension at 1 300 ℃ were 04 Pa·s and 032 N/m respectively, which could meet the demands for certain kinds of steels for mould fluxes in continuous casting.
关键词:
B2O3containing mould flux;fluoridefree flux;harmless flux;physical property
WANG Hongming
,
LI Guirong
,
LI Bo
,
et al
钢铁研究学报(英文版)
B2O3 is selected as fluxing agent of CaO-based ladle refining slag to decrease the melting temperature as well as to improve the speed of slag forming and the refining efficiency. The effects of B2O3 on the melting temperature of two series of refining slags including the low basicity slags (the mass ratio of CaO/SiO2 is 3~4) and the high basicity slags (the mass ratio of CaO/SiO2 is 5~8.75) were investigated. The slag melting temperature was measured using the hemisphere method. The results indicate that the fluxing action of B2O3 is better than that of CaF2 and Al2O3. For the CaO-based refining slag with low basicity, the melting temperature is decreased effectively when B2O3 is used to substitute for equal mass of CaF2, Al2O3 and SiO2, respectively. For the CaO-based refining slag with high basicity, when CaF2 is substituted with B2O3, the melting temperature can be decreased remarkably. Especially, when the mass ratios of CaO/Al2O3 and CaO/SiO2 are in range of 1.1~4.0 and 5.25~8.0, respectively, the slag melting temperature is lower than 1300℃. Therefore, the B2O3-containing refining slags with high ratios of CaO/Al2O3 and CaO/SiO2 have ultralow melting temperature. As a result, not only the slag forming speed but also the capabilities of desulfurizing, dephosphorizing and absorbing deoxidation products are expected to be improved.
关键词:
Fluoride-free slag;Boron oxide;CaO-based refining slag;Melting temperature;Basicity
王尧
,
董威
,
马文
物理测试
doi:10.3969/j.issn.1001-0777.2006.02.011
依据磁性测量冲击法基本原理,提出了一种将多元回归分析法用于磁性测量的新方法.本文着重讲述了如何使用MATLAB语言实现基于多元回归分析法下的磁性测量GUI界面.实践证明,该程序充分利用了MATLAB函数库,所编辑的GUI界面形象直观,操作方便,可快速精确地处理磁测数据,保存并显示计算结果,同时还可实现多个用户界面间的嵌套调用.大大缩短了计算时间,效果很好.
关键词:
冲击法
,
磁性测量
,
多元回归分析
,
MATLAB
,
GUI界面
吴燕燕
,
贺锋涛
,
孙林军
液晶与显示
doi:10.3788/YJYXS20122703.0338
μC/GUI在具有图形界面的嵌入式产品中得到了广泛应用,文章以LPC214X为嵌入式硬件开发平台,介绍了用于嵌入式应用的图形支持软件——μC/GUI,概括了它的功能及特色,对其移植进行了重点研究,实现了μC/GUI接口函数及配置文件的移植,并给出了具体的实现步骤和需要修改的源代码.
关键词:
嵌入式系统
,
μC/GUI
,
液晶显示
,
LPC214X
杨立身
,
张安伟
,
王磊
,
魏兰
液晶与显示
doi:10.3788/YJYXS20153002.0290
为了解决μC/GUI 中文字库占用空间大与 MCU 内部存储空间有限的矛盾，实现μC/GUI 对中文更全面完整的支持，对μC/GUI 外置汉字字库的实现方法进行研究，提出了将汉字字库存储于外置 spi flash 芯片的解决方案。首先对汉字存储相关的数据结构进行研究，编写 spi flash 芯片驱动程序，之后利用 PC 串口编写软件和串口中断处理函数将字库文件写入到外置 flash 芯片中。然后在中文字库成功写入 flash 芯片内部的基础上，对μC/GUI 中与字符显示相关的内核函数进行修改，完成对所有显示字符属性的判断，从而实现μC/GUI 对外部中文字库的支持。试验结果表明，外置字库中的汉字成功地在液晶屏上显示出来。存储于外置 spi flash 芯片中的字库能被μC/GUI 正常的调用和显示。外置spi flash 字库节省了 MCU 内部有限的存储空间，具有较好的通用性和灵活性。
关键词:
μC/GUI
,
图形界面
,
spi flash
,
外置字库
杨立身
,
张安伟
,
王磊
,
刘康
液晶与显示
doi:10.3788/YJYXS20142906.0950
为了创建一个高效、直观、支持多任务的嵌入式图像开发平台，建立了基于μC/OS_II、μC/GUI、STM32、ILI9320液晶屏的嵌入式实验环境，对μC/OS_II 和μC/GUI 的整合移植方法进行研究，并针对μC/GUI 的中文支持欠缺和屏幕刷新率低等不足进行优化.研究了μC/OS_II、μC/GUI 的组织架构，针对μC/OS_II 与 CPU 任务切换密切相关的文件进行改写，同时在μC/OS_II 成功移植的基础上对μC/GUI 进行进一步的移植操作，包括修改与μC/OS_II 相关的文件，改写μC/GUI 底层与 LCD 驱动密切联系的函数.在μC/GUI 成功移植的基础上对其字库文件进行改写，加入中文字库；对μC/GUI 的画点、画线、矩形填充函数进行修改，提高液晶屏的屏幕刷新效率.实验结果表明，所创建的4个任务切换正常，中文正常显示，同时像素填充率由之前的996080/s 上升到优化后的1629060/s.μC/OS_II 与μC/GUI 能正常地协同工作，优化带来了μC/GUI 性能的提升.
关键词:
μC/OS_II
,
μC/GUI
,
整合
,
优化
张传胜
液晶与显示
doi:10.3788/YJYXS20132802.0250
针对目前人机交互界面越来越复杂的应用需求,利用FPGA器件,设计了一种基于SOPC技术的触控显示GUI系统.系统使用FPGA器件驱动液晶屏和触控板,并内建SOPC软核处理器运行GUI图像接口软件模块,在使用时只需将显示的界面图像放到FLASH存储器中,利用一个串口与上位MCU相连接即可.相对于传统方法设计时间长,通用性差的缺点,本设计具有开发简单,界面美观的特点和极好的适用性.
关键词:
FPGA
,
GUI
,
触摸屏
