复合铁合金是指含有两种或多种合金元素的铁合金。使用这类铁合金可同时加入脱氧或合金化元素，对炼钢工艺有利，且能较经济合理地综合利用共生矿石资源。常用的有：锰硅、硅钙、硅锆、硅锰铝、硅锰钙和稀土硅铁等。
复合笼条转子感应电动机转子采用特殊的槽形，且槽中含有铸铝和铜铁合金两种材料。
The special slot is adopted in the rotor of the induction machine with compound cage rotor and there is two materials of casting aluminum and copper iron alloy in the slot.
综述了稀土元素的性质和在电镀铬、锡、锌、锌-镍合金、镍-铁合金以及在复合镀技术中的应用现状和前景。
Properties, application and future trend of rare earth elements in electrodeposition of chromium, tin, zinc, Zn-Ni, Ni-Fe and composite coatings are summarized.
通过预先制备带有孔隙的硼铁合金预制块，用普通浇注的方法，获得以灰铸铁为基的铸造表面复合材料。
Using a prefabricated porous ferroboron lump, a surface composite layer was made on gray cast iron matrix, with a common casting method.
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