共查询到18条相似文献,搜索用时 734 毫秒
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讨论了冲天炉炉后实现自动加料的方法,论述了如何利用可编程序控制器控制冲天炉炉后自动加料及软件编制。试验表明,使用可编程序控制器进行炉后加料控制,可提高加料精度,减少炉前铁水化学成分的波动,从而提高铸件质量 相似文献
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为了提高AOD炉的脱碳氧效率,减少还原用硅铁的消耗量,降低生产成本,日本新日铁公司对AOD炉进行了改造,增设了顶喷枪装置,向熔池喷吹空气,使AOD炉的脱碳氧效率在高碳范围中明显提高,硅铁单耗减少。 相似文献
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日本爱知钢公司知多厂已采用了AR—LD复合精炼工艺。此工艺流程由电炉、AOD精炼设备、钢包炉和连铸机组成。AOD精炼设备只用来预精炼耐蚀钢,然后在钢包炉和真空处理设备中进一步精炼。全套设备的技术性能如下: 电炉: 额定容量 10t 变压器功率 5MVA 相似文献
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评述了中频炉在铸钢熔炼中的基本经济指标,中频炉作为独立炼钢工序的优缺点和冶炼特殊合金方面的优越性。作为前道工序,中频炉与精炼设备如LF炉、AOD炉、VOD炉联合使用,广泛应用于铸钢生产。生产实践证明,中频炉在铸钢领域有着重要作用。 相似文献
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三、炉外非真空精炼法的发展从图1可以看出AOD、TN和SL以及LF等炉外非真空精炼法都是在上述炉外真空精炼法之后陆续开发出来的,但从表1可看到它们均以后来居上之势迅猛发展。AOD法五年内由56台增加到100多台,增长率为78.5%,TN 相似文献
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三号转炉要加料了。天车开过来,把转炉右侧加料台上的漏斗吊下来,工人们往漏斗里装满了石灰,天车又把它吊上去。几乎就是同时,加料台上的工人双手搬动导链,把漏斗下的槽子头伸到烟罩内接到炉口,然后拉开漏斗下面的挡板,石灰就顺着槽道流进炉内(参看图1、图2)。这一套加料动 相似文献
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论述了国内外不锈钢AOD精炼的过程控制系统,详细介绍了各个过程控制系统的特点,为自主设计新的AOD精炼的过程控制系统提供有用的信息. 相似文献
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Effects of non-metallic inclusions on the initiation of pitting corrosion in 11% Cr ferritic stainless steel examined by micro-droplet cell 总被引:1,自引:0,他引:1
This paper explores the effects of non-metallic inclusions (NMIs) on the initiation of pitting corrosion in type 409L stainless steels refined by the argon oxygen decarburization (AOD) and vacuum oxygen decarburization (VOD) processes. The dominant NMIs in the AOD and VOD samples were (Ti, Ca)-oxides and Ti-nitrides, respectively. In-situ electrochemical noise (EN) and micro-electrochemical analyses were conducted to investigate quantitatively the inherent effects of the NMIs on the pitting corrosion of the alloys. Pitting corrosion was initiated mostly around the (Ti, Ca)-oxides in the AOD samples, while little such corrosion occurred around the Ti-nitrides in the VOD samples. In addition, the pitting resistance of the AOD samples increased with increasing Ti content and decreasing Ca content in the (Ti, Ca)-oxides. 相似文献
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A new type of self-lubricating ceramic cutting tool material with the addition of metal coated solid lubricant powders was developed. Nickel coated CaF2 composite powders with core–shell structure were produced by electroless plating technique. The growth process of nickel coating on the solid lubricant CaF2 powders was analyzed. The as-prepared self-lubricating ceramic cutting tool material made by adding nickel coated CaF2 powders exhibited notable improvements in microstructure and mechanical properties, in comparison with the corresponding cutting tool material made by directly adding uncoated CaF2 powders. Cutting tests show that the new type of self-lubricating ceramic cutting tool has better antifriction property and wear resistance than the corresponding cutting tool. 相似文献
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采用第一原理赝势平面波法,计算了单独添加微量Sc、Zr及复合添加Sc、Zr后Al-Mg体系的能量与电子结构。结果显示:与纯Al和Al-Mg比较,Al-Sc、A1-Mg-Sc、Al3-Sc、Al-Zr、Al-Mg-Zr、Al3-Zr、Al-Sc-Zr、Al-Mg-Sc—Zr的负合金形成热与结合能增大,表明这些晶胞在Al-Mg合金体系中易形成且结构稳定;对电子态密度进一步分析发现,与单独添加Sc或Zr相比,复合添加Sc、Zr时,晶体在费米能级附近的低能区有更多的成键电子;复合添加Sc和Zr,合金体系结晶凝固时,有更多的晶粒提供非均匀形核作用的场所,因而晶粒细化的效果明显好于单独添加Sc或Zr。 相似文献