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冶金课件7英08《冶》Ex-Secondary Refining

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冶金课件7英08《冶》Ex-Secondary RefiningPAGE 1 英08《冶金科技口译》(Ex) 7-Secondary Refining 炉外精炼 7.3 Listening –Note-taking –Interpreting 〔原文:英译汉 1〕 Formerly, steel produced in the refining processes of the converter or electric arc furnace was considered “finished” and ready to be cast and rolled. // ...

冶金课件7英08《冶》Ex-Secondary Refining
PAGE 1 英08《冶金科技口译》(Ex) 7-Secondary Refining 炉外精炼 7.3 Listening –Note-taking –Interpreting 〔原文:英译汉 1〕 Formerly, steel produced in the refining processes of the converter or electric arc furnace was considered “finished” and ready to be cast and rolled. // Nowadays, secondary refining is generally applied after the refining process. The purpose of secondary refining is to produce “clean” steel, which satisfies strict requirements of surface, internal and micro-cleanliness quality and of mechanical properties. The tasks of secondary refining are: degassing, that is, decreasing the concentration of oxygen, hydrogen and nitrogen in steel; decarburization; removing undesirable non-metallic inclusions which are primarily oxides and sulfides. 〔原文:英译汉 2〕 There can be considerable overlap in the metallurgical functions achieved by various secondary steelmaking processes. In order to determine which process to install and to perform the various metallurgical functions required for a given product mix, the steelmaker must consider the capability and flexibility of the particular process. Consideration must also be given to the other operations of the shop, the expected tonnage throughput, and the relative capital and operating costs concerning the process. 〔原文:汉译英 1〕 二次冶金通过下述方法来提高金属的质量: · 精确的合金化 · 温度与成分的均匀化及温度控制 · 脱碳 · 脱硫 · 脱磷 · 除去夹杂元素 · 脱气 · 脱氧 · 夹渣的球化作用 · 改善洁净度 · 影响凝固显微组织 也就是说,二次冶金指的是把某些炼钢步骤转移到更适合其目的的下道工序设备中进行。 二次冶金引起了炼钢 工艺 钢结构制作工艺流程车尿素生产工艺流程自动玻璃钢生产工艺2工艺纪律检查制度q345焊接工艺规程 的根本变化。// 实际上,为某种具体生产 计划 项目进度计划表范例计划下载计划下载计划下载课程教学计划下载 而制定的二次冶金法在所有的冶金工厂都正在使用,具有非常广的用途和特别强的适应性。 〔原文:汉译英 2〕 在钢的凝固过程中,只有一部分溶解气体逸出。// 这就降低了钢的工艺性能。 如果外部压力降低,溶解在金属中的气体就会逸出——就像矿泉水瓶被打开时那样。// 所有的真空法依据的都是这种现象。 除了脱气,还有一些冶金反应也在真空中进行。//这些反应包括:脱碳至非常低的含碳量,合金化,脱氧和改善洁净度。// 因此,称之为“真空冶金”比“真空脱气”更合适。// 真空处理钢水的主要优点是洁净度高,含气量低和合金公差小。 真空处理所需的容器可以再加热以防止热损失或达到特定的温度。// 真空处理与搅拌气体相结合加速和促进了冶金反应。 〔参考译文:英译汉 1〕 过去,在转炉或电弧炉精炼过程中生产的钢被称为“成品”而用于铸造和轧制。// 现在,精炼工艺之后通常进行炉外精炼。 炉外精炼的目的是生产“纯净”钢,使它能够满足对 关于同志近三年现实表现材料材料类招标技术评分表图表与交易pdf视力表打印pdf用图表说话 pdf 面、内部和显微纯净度及机械性能等方面的严格要求。 炉外精炼的任务主要是:脱气,即:减少钢中的氢气、氧气和氮气的浓度,脱碳,去除不必要的非金属夹杂物,这些夹杂物主要是氧化物和硫化物。 〔参考译文:英译汉 2〕 许多炉外精炼工艺所达到的冶金功能会相互重叠。 为了确定采取何种工艺,以及实现对给定的产品 方案 气瓶 现场处置方案 .pdf气瓶 现场处置方案 .doc见习基地管理方案.doc关于群访事件的化解方案建筑工地扬尘治理专项方案下载 所要求的不同的冶金功能,钢厂必须考虑该工艺本身的实际能力和灵活性。 另外,还必须考虑与工序有关的车间内的其他操作,所预期的生产能力、相关投资以及操作成本等。 〔参考译文:汉译英 1〕 Secondary metallurgy aims at enhancing the quality of the metal by the following methods: · Precise alloying · Homogenizing temperature and composition as well as temperature control · Decarburization · Desulphurization · Dephosphorization · Elimination of tramp elements · Degassing · Deoxidation · Spheroidization of inclusions · Improving the cleanness · Influencing the solidification microstructure That is to say, secondary metallurgy refers to the transfer of certain steelmaking steps to downstream equipment best suited for the purpose. Secondary metallurgy has led to fundamental changes in the technology of steelmaking. // In fact, secondary metallurgy processes tailored for each specific production programme are applied in all metallurgical plants. There are very many special applications and possibilities of adaptation. 〔参考译文:汉译英 2〕 Dissolved gases only partly escape while the steel solidifies. // This impoverishes the technological properties of the steel. If the external pressure is lowered, then the gas which is dissolved in the metal can escape –as when a bottle of mineral water is opened. This is the phenomenon on which all vacuum processes are based. Besides degassing, additional metallurgical reactions are carried out in the vacuum. // These include decarburization to a very low degree, alloying, deoxidation and improving the cleanness. For this reason, the term “vacuum metallurgy” is preferred to “vacuum degassing”. // The basic advantages of vacuum treating liquid steel are good cleanness, low gas content and narrow alloying tolerances. The vessels required for vacuum treatment can be additionally heated up in order to prevent heat losses or to arrive at a specific temperature. // A combination of vacuum treatment and stirring gas accelerates and promotes the metallurgical reactions.
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