Diseño y construcción de cigüeñal, bielas y tapas de los rodamientos en fundición nodular de una bomba triplex de émbolo

Abstract

In the present titration work, the parts of a triplex pump, such as the crankshaft, connecting rods, and caps are obtained by casting, for which a study of the nodular casting is carried out, which is to be obtained by verifying the ASTM A-536, for class 80-55-06, which establishes different characterization parameters such as the chemical composition and mechanical properties of the material. To characterize the material be make tensile tests and chemical analysis obtaining in one of the extracted samples a tensile strength of 92.8 Ksi, a yield stress of 56.5ksi, and an elongation of 9%, while the chemical composition Which is obtained is 5.4% of carbon, 2.4% of silicon, 0.462% of manganese, 0.103% of phosphorus and 0.02% of sulfur, with which the alloy is checked, checking with the values of ASTM A-536. The chemical composition obtained differs with the established standard norm, this is due to the calibration of the equipment that was used. For the microstructure of the alloy, metallographic tests are carried out and is characterized by ASTM A-247, and the AFS catalog, Ductile Iron microstructures rating chart, which shows the percentage of nodularity, in this case 90% of Nodularity of the best extracted sample.