product news/產品新聞
Gray and Ductile Iron Treatment 灰铁和球铁的处理
Post-furnace gray iron is normally either tapped into a
ladle and subsequently cast or, especially in high volume foundries, taken from the melting unit to a holding furnace. A critical issue in holding metal is ensuring nucleation levels do not fall, leaving “dead” iron. Te use of Preseed precon- ditioner during melting (or in the case of cupola melting, as the metal enters the holding furnace) will ensure nuclei last a long time with very little fade. For ductile iron, the selection of the right nodularizer is critical. Te use of MgFeSi alloys is the optimum means for magnesium recovery, nucleation and flexibility, particularly as every foundry is different in terms of raw materials, melting conditions, ladle design, temperatures, molding media and casting modulus. A MgFeSi treatment alloy needs to be selected to suit these
criteria. Elkem produces more than 100 different chemistries of alloy to suit these variables. Te Lamet nodularizer range, for example, has both in-the-mold alloys and ladle-grade alloys. Te current trend in iron casting facilities is to use low Mg containing Lamet alloys with an effective cover material, such as Topseed to maximize Mg recovery with low reactivity. Lamet nodularizer is specially designed to minimize shrinkage. Te low reactivity means the nodularization process has
only a small effect on nucleation leading to more stable iron with higher levels of nuclei. Tis makes the iron more respon- sive to inoculation and less prone to shrinkage. For more information, contact your local Elkem representa- tive or visit
www.elkem.com/foundry.
炉后处理的灰铁铸件通常是加入到浇包内部后再 浇注铸件，或者是从熔化设备转至保温炉处理，尤其 是对于产量大的铸造厂。在处理金属液的过程中一个 重要因素就是要确保孕育水平不衰退，不留下无效铸 件。在熔炼过程中（或者在冲天炉熔炼中，作为金属 进入保温炉）使用Preseed处理剂将确保衰退非常小 的长效孕育。
对于球铁，选择正确的球化剂对于铸造工艺是决 定性的。对于每个铸造厂镁回收、形核和机动性的 不同，尤其是每个铸造厂由于原材料、熔化条件、浇 包设计、温度、造型介质以及铸件模数的差异，使用 MgFeSi合金毋庸置疑是最适宜的工艺。 MgFeSi处理合金需要适合这些准则来选择。埃肯 公司制造了超过100种不同成分的合金以适应这些变 化。比如，Lamet球化剂的范围，有型内法处理的 合金和不同浇包级别的合金。球铁铸件现在的趋势 是使用镁含量低的Lamet合金，配合有效的覆盖材 料，比如最快速度下以低反应性使镁的作用效果最 大。Lamet球化剂对于控制缩松特别有效。 低反应性意味着球化过程对成核仅有很小的影 响，导致有更高的成核率的更稳定的球铁件。这样使 铸铁对于孕育更敏感同时减小缩松倾向。
One of the World’s Largest Shot Blast Systems PJSC Energomashspetsstal (EMSS) foundry, Krama-
全球最大的抛丸清理设备 乌克兰Kramatorsk 市PJSC
torsk, Ukraine, specializes in casting very large, heavy and complex components. Considering the high value of the castings, they are subject to comprehensive quality controls including the specified surface cleanliness. For this reason, castings with dimensions up to 40 x 23 x 16 ft. (12 x 7x 5m) and weights up to 250 metric tons can undergo an intensive blast cleaning process. Te new blast cleaning system, one of the biggest shot blast machines in the world, was designed by Rösler Oberflächentechnik GmbH, Untermerzbach, Germany, to fit precisely into the available space at the customer’s premises. EMSS’s iron and steel casting facilities have been manu-
facturing castings and forgings for the heavy, energy gener- ating and nuclear industries as well as for marine and traffic engineering since 1964. Te company specializes in com- ponents such as steam and hydro turbine housings, steam turbine rotors, hydro rotors, trusses, ring gears, screw blades and hubs, support rollers for hot and cold rolling mills and die fixing blocks. Because of function, size and weight, these
Energomashspetsstal（EMSS）铸造厂，专业从事大 尺寸、重型并且结构复杂的铸造零部件的生产。为了提 高铸件的附加值，他们更严格的进行全面的质量控制， 包括铸件表面清洁度。因此，需要对尺寸为40×23×16 英尺（12 x 7x 5米），重达250吨的铸件进行更仔细的 喷丸清理。新定制的抛丸清理设备，是世界上最大的抛 丸设备之一，由德国Untermerzbach市Rösler Ober- flächentechnik有限公司设计，能够精确的利用客户现 场的可用空间。
EMSS公司的铸铁和铸钢车间自1964年以来为重型 装备、能源电力和核工业以及船舶和交通工程行业生产 铸件和锻件。公司的专业产品有蒸汽和水轮机轴承座、 汽轮机转子、水电转子、桁架、齿轮环、螺旋叶片和轮 轴，冷热轧机支持辊，以及模具固定块。由于产品特殊
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FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION June 2014
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