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Effect of Two Kinds of Refiners on the Solidification Structure and Property of Invar Alloy

机译：两种炼油厂对Invar合金凝固结构和性质的影响

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The solidification structure of two 500g cylindrical ingots of Fe-36Ni invar alloy,which were melted in a carbon tube furnace and cast adding Ce and Zr-Ti refiners respectively,were investigated.The results show that the grain size became smaller.With the increase of refiner content,the ratio of equiaxed grains of ingot increased and the equiaxed grain size decreased.As for the 100kg flat ingot,which was melted in a vacuum induction furnace and cast with Ce and Zr-Ti refiners respectively,the situation was different slightly.When adding Ce the dendritic grain diameter of the flat ingot became finer and the equiaxed grain ratio remained low; however,the mechanical property deteriorated.While adding Zr-Ti complex refiners,the solidification structure of the alloy was improved dramatically.Therefore,the mechanical properties at room temperature of as-cast flat ingots were improved.Furthermore,its high temperature ductility range expanded and the expansion coefficient of its hot-rolling plate remained almost the same.
机译：研究了在碳管炉中熔化的两种500g圆柱形锭的凝固结构，分别在碳管炉中熔化并分别浇铸Ce和Zr-Ti refiners。结果表明晶粒尺寸变小。随着增加的精磨机含量，铸锭的等轴晶粒的比例增加，等轴晶粒尺寸降低。对于100kg平锭，其分别在真空感应炉中熔化并分别用CE和Zr-Ti炼油厂熔化，略有不同当添加CE时，平锭的树突晶粒直径变细，等轴晶比例仍然低;然而，机械性能劣化。加入Zr-Ti复合物的炼油厂，该合金的凝固结构显着提高。因此，改善了室温的机械性能。加热，其高温延展性范围扩大它的热轧板的膨胀系数几乎相同。

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