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Gutiérrez Salas, Christian Marín - One of the best experts on this subject based on the ideXlab platform.
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Efecto de la temperatura de recocido sobre la resistencia al impacto y dureza de una fundición Nodular astm a536 en la obtención de una fundición Nodular ferrítica
Universidad Nacional de Trujillo, 2018Co-Authors: Fabián Guzmán, Tony Alexander, Gutiérrez Salas, Christian MarínAbstract:En la presente investigación se estudió el efecto de la temperatura de recocido en una fundición Nodular ASTM A536 sobre la dureza, resistencia al impacto y microestructura en la obtención de una fundición Nodular ferrítica. Para tal propósito se utilizó barras cuadradas de 15 mm x 15 mm x 200 mm de longitud suministrados por Fundición Laminar SAC – Lima, de donde se maquinaron las probetas para el ensayo de dureza según la norma ASTM E-140 y para el ensayo de impacto según norma ASTM E23-98, los cuales fueron recocidos a las temperaturas de 800, 850, 900, 950 y 1000°C por un tiempo de 25 horas con enfriamiento lento dentro del horno. Los resultados muestran que al incrementar la temperatura de recocido la dureza disminuye desde 198.40 HB para suministro (25°C) hasta 114.80 HB para 1000°C de temperatura de recocido, y la resistencia al impacto (J) aumenta según se incrementa la temperatura de recocido desde 53.90 J para suministro (25°C) hasta 124.20 J para 1000°C. Esto debido a la descomposición de la austenita en ferrita que va aumentando según se incrementa la temperatura de recocido, siendo la transformación completa o total de la austenita en ferrita en las condiciones de estudio desde 900°C, a partir de la cual se obtuvo una fundición Nodular ferrítica y que los nódulos de grafito (Gn) son estables a cualquier temperatura de recocido en estudio. Se concluye que la temperatura de recocido afecta significativamente la dureza, resistencia al impacto y microestructura, y que la temperatura mínima para la obtención de una fundición Nodular ferrítica en las condiciones de estudio es 900°C. Los resultados obtenidos han sido contrastados con un análisis estadístico con un nivel de confianza del 95%.TesisIn the present investigation, the effect of the annealing temperature in a Nodular Cast Iron ASTM A536 on the hardness, impact resistance and microstructure in obtaining a ferritic Nodular Cast Iron was studied. For this purpose we used square bars of 15 mm x 15 mm x 200 mm in length supplied by Fundición Laminar SAC - Lima, where the specimens were machined for the hardness test according to the ASTM E- 140 standard and for the impact test according to ASTM E23-98, which were annealed at temperatures of 800, 850, 900, 950 and 1000 ° C for a time of 25 hours with slow cooling inside the oven. The results show that when the annealing temperature is increased, the hardness decreases from 198.40 HB for supply (25°C) to 114.80 HB for 1000°C annealing temperature, and the impact resistance (J) increases as the temperature increases. annealed from 53.90 J for supply (25°C) up to 124.20 J for 1000°C. This is due to the decomposition of austenite in ferrite that increases as the annealing temperature increases, being the total or total transformation of austenite in ferrite under the study conditions from 900°C, from which a ferritic Nodular Cast Iron and that the graphite nodules (Gn) are stable at any annealing temperature under study. It is concluded that the annealing temperature significantly affects the hardness, impact resistance and microstructure, and that the minimum temperature for obtaining a ferritic Nodular Cast Iron in the study conditions is 900°C. The results obtained have been contrasted with a statistical analysis with a confidence level of 95%
Vaquez Heredia Richar - One of the best experts on this subject based on the ideXlab platform.
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Efecto de la temperatura de recocido sobre la resistencia a la tracción, tensión de fluencia, ductilidad, dureza y microestructura en una fundición Nodular astm a536
Universidad Nacional de Trujillo, 2019Co-Authors: Meza Lazo, Marco Antonio, Vaquez Heredia RicharAbstract:En la presente investigación se estudió el efecto de la temperatura de recocido sobre la resistencia a la tracción, tensión de fluencia, ductilidad, dureza y microestructura de una fundición Nodular ASTM A536, por lo cual se utilizó barras de diámetro de 16 mm x 200 mm de longitud, fabricados por la empresa Fundición Laminar SAC – Lima, los cuales fueron recocidos a las temperaturas de 800, 850, 900, 950 y 1000°C por espacio de 20 horas con enfriamiento lento dentro del horno. Las probetas fueron maquinadas para el ensayo de tracción según norma ASTM E-8 y para el ensayo de dureza según norma ASTM E-140. Los resultados experimentales muestran que al incrementar la temperatura de recocido la resistencia a la tracción disminuye desde 443.40 MPa para 800°C hasta 386.70 MPa para 1000°C, la tensión de fluencia disminuye desde 325.00 MPa para 800°C hasta 281.70 MPa para 1000°C y con respecto a la ductilidad, esta aumenta desde 10.30 hasta 17.60% para 900°C y luego disminuye hasta 13.30% a 1000°C. La dureza disminuye desde 166.0 HB para 800°C hasta 123.40 HB para 1000°C debido a la descomposición de la austenita en ferrita, y que para las temperaturas de 800 y 850°C la descomposición es parcial y microestructuralmente consta de ferrita, algo de perlita y nódulos de grafito (Gn), mientras que para las temperaturas de 900, 950 y 1000°C la transformación de la austenita a ferrita es total porque microestructuralmente constan de ferrita y nódulos de grafito (Gn). Los resultados muestran también que la temperatura mínima de transformación total de la austenita a ferrita es 900°C porque a esta temperatura la fundición Nodular ASTM A536 se transforma en fundición Nodular ferrítica. Se concluye que la temperatura de recocido por 20 horas con enfriamiento lento dentro del horno afecta significativamente a la resistencia a la tracción, tensión de fluencia, ductilidad y dureza en una fundición Nodular ASTM A536, según el análisis estadístico con un 95% de confiablidadTesisIn the present investigation, the effect of the annealing temperature on the tensile strength, yield stress, ductility, hardness and microstructure of a Nodular Cast Iron ASTM A536 was studied, therefore, bars with a diameter of 16 mm x 200 mm in length were used, manufactured by the company Fundición Laminar SAC - Lima, which were annealed at temperatures of 800, 850, 900, 950 and 1000°C for 20 hours with slow cooling inside the oven. The specimens were machined for the tensile test according to ASTM E-8 and for the hardness test according to ASTM E-140. The experimental results show that when increasing the annealing temperature the tensile strength decreases from 443.40 MPa for 800°C to 386.70 MPa for 1000°C, the yield stress decreases from 325.00 MPa for 800°C to 281.70 MPa for 1000°C and with respect to ductility, this increases from 10.30 to 17.60% for 900 ° C and then decreases to 13.30% at 1000°C. The hardness decreases from 166.0 HB for 800°C to 123.40 HB for 1000°C due to the decomposition of austenite in ferrite, and that for temperatures of 800 and 850°C the decomposition is partial and microstructurally it consists of ferrite, some perlite and graphite nodules (Gn), while for temperatures of 900, 950 and 1000°C the transformation of austenite to ferrite is total because microstructurally it consists of ferrite and graphite nodules (Gn). The results also show that the minimum temperature of total transformation of austenite to ferrite is 900 ° C because at this temperature the Nodular Cast Iron ASTM A536 is transformed into ferritic Nodular Cast Iron. It is concluded that the annealing temperature for 20 hours with slow cooling inside the furnace significantly affects the tensile strength, yield stress, ductility and hardness in a Nodular Cast Iron ASTM A536, according to the statistical analysis with a 95% reliability
Migdad Migdad - One of the best experts on this subject based on the ideXlab platform.
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Analisa Permukaan Patahan Spesimen Uji Impak Besi Cor Nodular Dengan Variasi Kandungan Magnesium 0,0307%, 0,0336% dan 0,0351%
2020Co-Authors: Migdad MigdadAbstract:Nodular Cast Iron is a type of round Cast Iron graphite. Magnesium (Mg) is the element most often used in the world of the Casting industry as a graphite rounder because it is more profitable than other elements. This study aims to determine the effect of Nodular Cast Iron magnesium (Mg) variation on the microstructure, Mg composition, phase configuration, graphite and its matrix. This study uses FCD as a starting material which is then melted in the melting furnace. The process of forming a round-shaped Cast Iron is carried out with an open ladel system, which is a variation of 50 grams, 100 grams, and 200 grams of FeSiMg which is placed at the base of a 15 kg capacity ladder just before the liquid Iron is poured in ladels. Based on the results of the study, data analysis and the results of the discussion on the Surface Analysis of the Nodular Cast Iron Impact Test with Variations in Magnesium Content (Mg) of 50 grams, 100 grams, 200 grams, the more FeSiMg additions, the magnesium (Mg) content increases from specimen 1 (Mg) 0.0307%), specimen 2 (0.0336%) and specimen 3 (0.0351%). Keywords: Nodular Cast Iron, SEM, Micro Photo, Impac
Setyawan, Ardiyan Aji - One of the best experts on this subject based on the ideXlab platform.
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Pengaruh Variasi Kandungan Magnesium (Mg) dalam Proses Pembuatan Besi Cor Nodular terhadap Kekerasan
2019Co-Authors: Setyawan, Ardiyan AjiAbstract:Nodular Cast Iron is a gray Cast Iron with the process of adding magnesium alloy (Mg) or cerium (Ce) so that it transforms the shape of the graphite flakes into rounded (nodules).The purpose of this study is to determine the influence of magnesium content on microstructure and hardness of Nodular Cast Iron. The research was conducted using the material of Nodular Cast Iron which is melted in the induction furnace, this study uses the main ingredient FCD as the starting ingredient.The process of forming a spherical graphite Cast Iron is carried out by using the open Ladel system, the addition of FeSiMg weighing 50 grams, 100 grams, 150 grams, and 200 grams are placed on the base of Ladel with a capacity of 15 kg shortly before the liquid Iron were poured into the Ladel Pouring.The results showed that increasing elements of magnesium (Mg) will result graphite granules were tended to be smaller and increased perlit areas. The smallest hardness value 210,59 BHN occurs in specimens 1 Raw material FCD with magnesium composition 0,0296% Mg and the largest hardness value of 296,64 BHN occurs in specimen 5 with magnesium composition of 0,0351% Mg
Romandhani, Aditya Brori - One of the best experts on this subject based on the ideXlab platform.
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Pengaruh Variasi Kandungan Magnesium (Mg) dalam Proses Pembuatan Besi Cor Nodular terhadap Ketahanan Aus
2019Co-Authors: Romandhani, Aditya BroriAbstract:Nodular Cast Iron is one type of Cast Iron whose graphite is round. Magnesium (Mg) is the material most often used by the Casting industry as a graphite forming material because it is more profitable than other materials. This study aims to determine the effect of magnesium (Mg) content to microstructure and wear resistance of Nodular Cast Iron. The study was used FCD as the starting material which was then smelted in the induction furnace. The process of forming round graphite Cast Iron is carried out by using an open ladel system, variations in the addition of FeSiMg by 50 grams, 100 grams, 150 grams, and 200 grams was placed under 15 kg capacity ladel just before the molten Iron is poured into the ladel. The results showed that the increasing percentage of magnesium (Mg) in Nodular Cast Iron produced the graphite granules which tended to be more rounded with uniform graphite grain size and tended to shrink, in addition there was an increase in pearlite area and reduced ferrite area. while based on wear testing with the ogoshi method the highest wear value 1,318 × 10-5 mm3/kg.m occurred in specimen 1 raw material FCD and the lowest wear value was 8.837 × 10-6 mm3/kg.m occurred in specimen 5
