<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1993-8012</journal-id>
<journal-title><![CDATA[Minería y Geología]]></journal-title>
<abbrev-journal-title><![CDATA[Min. Geol.]]></abbrev-journal-title>
<issn>1993-8012</issn>
<publisher>
<publisher-name><![CDATA[EDUM. Universidad de Moa]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1993-80122019000100140</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Microestructura del hierro fundido gris FG 24 sometido a tratamiento térmico]]></article-title>
<article-title xml:lang="en"><![CDATA[Microstructure of gray cast iron FG 24 subjected to heat treatment]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguirre-Breffe]]></surname>
<given-names><![CDATA[Yoel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fernández-Columbié]]></surname>
<given-names><![CDATA[Tomás]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-González]]></surname>
<given-names><![CDATA[Isnel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castillo-Matos]]></surname>
<given-names><![CDATA[Ramón]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Izaguirre-Bonilla]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Empresa Importadora y Abastecedora del Níquel, CEXNi  ]]></institution>
<addr-line><![CDATA[Moa Holguín]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Superior Minero Metalúrgico de Moa  ]]></institution>
<addr-line><![CDATA[ Holguín]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2019</year>
</pub-date>
<volume>35</volume>
<numero>1</numero>
<fpage>140</fpage>
<lpage>159</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S1993-80122019000100140&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S1993-80122019000100140&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S1993-80122019000100140&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Se realizó la caracterización microestructural de las transformaciones que ocurren en el hierro gris FG 24 sometido a tratamiento térmico. Seis muestras de la aleación fueron recocidas durante tiempos distintos (2 h y 3 h), a una misma temperatura (740 oC), con enfriamiento en el horno. En ambos tratamientos se obtuvieron microestructuras de hojuelas de grafito laminar en una matriz de ferrita, con tamaño número 4 del grafito para el tratamiento a dos horas y tamaño número 3 para el de tres horas. Se evidenció que se mantiene la distribución tipo A del grafito para ambos tratamientos. En los perfiles de dureza, esta propiedad varía desde 230 HB para la muestra patrón, hasta 160 HB para el mayor tiempo de permanencia en el horno.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The microstructural characterization of the transformations that occur in gray iron FG 24 subjected to thermal treatment was carried out. Six samples of the alloy were annealed at the same temperature (740 °C) but for different times (2 hours in one treatment and 3 hours in the other), with furnace cooling. Microstructures of lamellar graphite flakes were obtained in both treatments in a ferrite matrix, with size 4 of graphite for two hours treatment and size 3 for three hours treatment. It was evidenced that type A distribution of the graphite is maintained in both cases. This property varied in the hardness profiles from 230 HB for the standard sample, to 160 HB for the longest residence time in the furnace.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[hierro gris]]></kwd>
<kwd lng="es"><![CDATA[microestructura]]></kwd>
<kwd lng="es"><![CDATA[recocido]]></kwd>
<kwd lng="es"><![CDATA[grafito laminar]]></kwd>
<kwd lng="es"><![CDATA[ferrita]]></kwd>
<kwd lng="en"><![CDATA[gray iron]]></kwd>
<kwd lng="en"><![CDATA[microstructure]]></kwd>
<kwd lng="en"><![CDATA[annealing]]></kwd>
<kwd lng="en"><![CDATA[lamellar graphite]]></kwd>
<kwd lng="en"><![CDATA[ferrite]]></kwd>
</kwd-group>
</article-meta>
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