Junta de soldadura disímil de la aleación hk – 40 y del hierro fundido 24//Dissimilar welding joints of the alloy hk - 40 and of the cast iron 24

Authors

  • Tomás Fernández‐Columbié Instituto Superior Minero Metalúrgico de Moa. Las Coloradas. Moa, Holguín
  • Isnel Rodríguez‐González Instituto Superior Minero Metalúrgico de Moa. Holguín
  • Rodney E. Correa‐Suárez Empresa Comandante Gustavo Machin Hoed De Beche. Holguín
  • Dayanis Alcántara‐Borges Instituto Superior Minero Metalúrgico de Moa. Holguín

Abstract

El objetivo del trabajo es establecer el comportamiento microestructural de una unión soldada disímil en una aleación HK 40 y el hierro fundido 24, la cual se realiza en equipo que prestan servicios en la industria del níquel y que por las características de la unión, surgen en el mismo problema de agrietamiento. Se realizó una caracterización química de ambas aleaciones, luego por el proceso de
mecanizado se prepararon un total de nueve muestras, las que fueron soldada por proceso manual por arco eléctrico, los electrodos revestidos empleados fueron el E 312–16, el UTP 65 y el Castell Xiron 244, demostrándose en el análisis microestructural y en el diagrama de Schaeffler, que la disposición de la unión con el electrodo E 312–16 provoca la aparición de estructura interdendritica con origen a la fundición blanca, siendo más favorable la unión con el electrodo UTP 65. Se le realizó el análisis de microdureza en cada unión.

Palabras claves: disímil, aleación, agrietamiento, soldadura, electrodos.
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Abstract

It is paper have the objective to establish the behaviour microstructure of an union welded dissimilar in an alloy HK 40 and the cast iron 24, which is carried out in team that you lend services in the industry of the nickel and that for the characteristics of the union, they arise in the same cracking problem. He was carried out a chemical characterization of both alloys, then for the process of
automated got ready a total of nine samples, those that were welding for process shield for electric arch (SMAW), the electrodes lined employees were the E 312 - 16, the UTP 65 and the Castell Xiron 244, being demonstrated in the analysis microstructure and in the diagram of Schaeffler that the disposition of the union with the electrode E 312 - 16 cause the appearance of structure inter dendrite
with origin to the white foundry, being more available the union with the electrode UTP 65. He was carried out the micro hardness analysis in each union.

Key words: dissimilar, alloy, cracking, welding, electrodes.

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How to Cite

1.
Fernández‐Columbié T, Rodríguez‐González I, Correa‐Suárez RE, Alcántara‐Borges D. Junta de soldadura disímil de la aleación hk – 40 y del hierro fundido 24//Dissimilar welding joints of the alloy hk - 40 and of the cast iron 24. Ing. Mec. [Internet]. 2014 May 1 [cited 2025 Sep. 13];17(2):98-107. Available from: https://ingenieriamecanica.cujae.edu.cu/index.php/revistaim/article/view/482

Issue

Vol. 17 No. 2 (2014): mayo-agosto

Section

Original article

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