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应用有机电解液低温电解及放射性测量方法,测定了普通铸铁及高纯Fe-C-Si合金中的合金化Ce量及石墨中的Ce量,石墨中的Ce量大都略高于或相近于基体中的Ce量,在Ce含量相同的情况下,铸铁中的合金化Ce量比钢中多。涂层法自射线照相结果表明:Ce在片状石墨中呈均匀分布,而在球状石墨中的分布却是多样的。开花状石墨中的Ce多于片状石墨及球状石墨中的Ce.球状石墨周围的铁素体及珠光体是贫Ce.远离球状石墨的珠光体及莱氏体是富Ce.初生奥氏体枝晶转变形成的珠光体和蜂窝状莱氏体都含有较少的Ce,而板状渗碳体型莱氏体含Ce较多.Ce明显富集于共晶时最后凝固的区域。球状石墨的形成主要取决于原铁水中的反球化剂(硫)含量,它的影响比球化剂的残留量或合金化量的作用更大。
The method of low temperature electrolysis and radioactive measurement of organic electrolyte was used to determine the amount of Ce and the amount of Ce in graphite in ordinary cast iron and high purity Fe-C-Si alloy. The amount of Ce in graphite was mostly higher or similar to that of matrix In the amount of Ce, in the case of the same Ce content, cast iron in the amount of alloying Ce than steel. The radiographic results of the coating method show that: Ce is uniformly distributed in the flake graphite, while the distribution in the spherical graphite is varied. Ce in flowering graphite is more than Ce in flake graphite and spherical graphite. The ferrite and pearlite around spherical graphite are lean Ce. The pearlite and ledeburite far from the spherical graphite are rich in Ce. Primary austenite The pearlite and honeycomb ledeburite formed by dendrite transformation contained less Ce, while the plate-like cementite-type ledeburite contained more Ce, which was obviously enriched in the final solidified region during eutectic. The formation of spheroidal graphite mainly depends on the anti-nodularizing agent (sulfur) content in the original hot metal, and its effect is greater than that of the nodulizer or alloying.