A technological table of a steel gathers various technological data as well as a series of diagrams that allow the manufacturer and the user to obtain the desirable properties in order to guarantee the commissioning of said steel. Therefore, the technological table is a complement to the classification table that classifies steels according to their chemical composition and the Standard that indicates the minimum characteristics that must be obtained with a previously established treatment. The determination of the different data that make up this table is simple and is within the reach of any laboratory or a small metallurgical industry. It should be remembered that technological data are usually indicative, given the different behavior of different castings of the same type of steel and the normal limitations of the test methods, only a statistical study will be able to reflect the rea...

A technological table of a steel gathers various technological data as well as a series of diagrams that allow the manufacturer and the user to obtain the desirable properties in order to guarantee the commissioning of said steel. Therefore, the technological table is a complement to the classification table that classifies steels according to their chemical composition and the Standard that indicates the minimum characteristics that must be obtained with a previously established treatment. The determination of the different data that make up this table is simple and is within the reach of any laboratory or a small metallurgical industry. It should be remembered that technological data are usually indicative, given the different behavior of different castings of the same type of steel and the normal limitations of the test methods, only a statistical study will be able to reflect the rea...

NCs have many unique behaviors that are not seen in volume level materials. The objective of the study is to know the effects of the transformation of phases with respect to the orientation and speed in the copper nanowire deformed by traction. Due to the need to better understand the deformation mechanisms through simulations and the molecular dynamics method with the potentials of the EAM type, we evaluate the phase transformation in the direct correlation between the stress-strain curve, and the percentage of the abundance of pairs. In the elastic region in a range of 60% to 80% of atoms they are forming FCC structures, about 10% to 20% the HCp structure, the formation of the BCC structure is minimal and the percentage of other formations are in a range of 20% to 40%, affected by speed and orientation as a result, the greatest modulus of elasticity is 100 GPa and yield strength of 9.0...

NCs have many unique behaviors that are not seen in volume level materials. The objective of the study is to know the effects of the transformation of phases with respect to the orientation and speed in the copper nanowire deformed by traction. Due to the need to better understand the deformation mechanisms through simulations and the molecular dynamics method with the potentials of the EAM type, we evaluate the phase transformation in the direct correlation between the stress-strain curve, and the percentage of the abundance of pairs. In the elastic region in a range of 60% to 80% of atoms they are forming FCC structures, about 10% to 20% the HCp structure, the formation of the BCC structure is minimal and the percentage of other formations are in a range of 20% to 40%, affected by speed and orientation as a result, the greatest modulus of elasticity is 100 GPa and yield strength of 9.0...

Recientemente, con el rápido avance de la nanociencia y la nanotecnología, los nanocables metálicos han recibido atención adicional entre los investigadores debido a sus propiedades únicas tales como mecánicas, eléctricas, ópticas así como por sus potenciales aplicaciones en diferentes campos de la ciencia y tecnología. Los NCs tienen muchos comportamientos únicos que no se ven en los materiales a granel, cuyas propiedades y funcionalidades del material tienden a diferir cuando sus dimensiones se reducen al tamaño nanométrico. Debido a las dificultades experimentales en el estudio de las propiedades mecánicas de los nanocables y la necesidad de comprender mejor los mecanismos de deformación plástica, la simulación numérica es de mucha utilidad e importancia. El objetivo principal del estudio fue caracterizar los nanocables de Cu, Ag y Au. Las simulaciones se realizaron ...

The research is done to materials that have already failed the corrosion that comes from leading domestic drinking water installations. In this first part of a zinc alloy, Zamak is studied, used as a stopper in a galvanized "T". The material has worked as a sacrificial anode to protect the steel for 4 years. Exfoliating how corrosion occurs in the material.

La investigación es realizada a materiales que han fallado y a la corrosión que proviene de las instalaciones domésticas que conducen agua potable. En esta primera parte se estudia una aleación de zinc, Zamak, usada como tapón en una "T" galvanizada. El material ha trabajado como ánodo de sacrificio protegiendo al acero durante 4 años. La forma de corrosión exfoliante se presenta en el material.

In some cases it is easy to extract the gold present in an ore by conventional methods cyanidation heap , but in others, the results are very poor and may have originated in mineralogical intergrowths in atomic or sub - atomic size , presence of elements cianicidas and content of fine materials , our research is aimed at finding alternative precious metal , causing severe losses in the tailings gold . work is to show in what circumstances must bind the mineral to solve the problem when a solution presents interesting gold ore fines content and clay materials that are compact when wet and does not allow the cyanide used as a solvent , have mass reach reagent consumption, % moisture : contact with the poor percolation of leaching solutions , characteristic of a good binder machines used to bind minerals, determine the most appropriate economic binder and technically , the different effects...

The present investigation has determined the average measure of grain size, including a Jeffries planimetric procedure in materials such as SAE 1010 carbon steel, and AISI 316 stainless steel. Likewise, the digital camera incorporated into the metallographic microscope, has enabled the application of image analysis for the study of the microstructure of materials.

The current study has determined that the materials from brass to bismuth, 1.11%, 1.46% and 2.48% respectively, have the following characteristics: the brass to bismuth material drawing, uniform round bar of 19 mm which microstructure is formed by α + β, shows inclusions of bismuth in the grain limits and in the same grain. The grain deformation is smaller on the surface, and it becomes bigger as it reaches the center. The mechanical properties of the 19 mm drawing material, I and II are bigger than the established by the ASTM B 16/B 16M, being the HRB hardness higher than the established by the norm. Also the material is wrought to obtain pieces for gas valves. The machinability index of the brass’s drawing materials that contains bismuth between 1.0 and 2.5% should be in a range from 85 and 90

The research project: Martensitic precipitation in AISI 304 stainless steel-corrosion cracking has determined that the material tested under different compressive loads, the austenite phase producing deformed martensite phase, which is magnetic. The accelerated corrosion test deformed martensite material having a solution of magnesium chloride in boiling 42% produces a type of corrosion transgranular.

The Project of Investigation called: Evaluation of the magnetic phase in Stainless steel AISI 304, worked in cold and its recovery by Heat Treatment has determined that the material of testing submitted to loads by compression is magnetized, which increasing its hardness and transforming partially the austenitic structure in martensitic. The material of transformed structure was submitted to heat treatment to 700 oC and 800 oC respectively which origins the recovery of the structure.

The Project of Investigation called: Evaluation of the magnetic phase in Stainless steel AISI 304, worked in cold and its recovery by Heat Treatment has determined that the material of testing submitted to loads by compression is magnetized, which increasing its hardness and transforming partially the austenitic structure in martensitic. The material of transformed structure was submitted to heat treatment to 700 oC and 800 oC respectively which origins the recovery of the structure.

The current study has determined that the materials from brass to bismuth, 1.11%, 1.46% and 2.48% respectively, have the following characteristics: the brass to bismuth material drawing, uniform round bar of 19 mm which microstructure is formed by α + β, shows inclusions of bismuth in the grain limits and in the same grain. The grain deformation is smaller on the surface, and it becomes bigger as it reaches the center. The mechanical properties of the 19 mm drawing material, I and II are bigger than the established by the ASTM B 16/B 16M, being the HRB hardness higher than the established by the norm. Also the material is wrought to obtain pieces for gas valves. The machinability index of the brass’s drawing materials that contains bismuth between 1.0 and 2.5% should be in a range from 85 and 90

The research project: Martensitic precipitation in AISI 304 stainless steel-corrosion cracking has determined that the material tested under different compressive loads, the austenite phase producing deformed martensite phase, which is magnetic. The accelerated corrosion test deformed martensite material having a solution of magnesium chloride in boiling 42% produces a type of corrosion transgranular.

In some cases it is easy to extract the gold present in an ore by conventional methods cyanidation heap , but in others, the results are very poor and may have originated in mineralogical intergrowths in atomic or sub - atomic size , presence of elements cianicidas and content of fine materials , our research is aimed at finding alternative precious metal , causing severe losses in the tailings gold . work is to show in what circumstances must bind the mineral to solve the problem when a solution presents interesting gold ore fines content and clay materials that are compact when wet and does not allow the cyanide used as a solvent , have mass reach reagent consumption, % moisture : contact with the poor percolation of leaching solutions , characteristic of a good binder machines used to bind minerals, determine the most appropriate economic binder and technically , the different effects...

The present investigation has determined the average measure of grain size, including a Jeffries planimetric procedure in materials such as SAE 1010 carbon steel, and AISI 316 stainless steel. Likewise, the digital camera incorporated into the metallographic microscope, has enabled the application of image analysis for the study of the microstructure of materials.

The influence of the moisture and sodium bentonite in the qualite moulding was tested; however one of the mixes was much better, which is the following: Sodium bentonite 7%, Water 4%, Silica sand 87%, ( AFS grain fineness 52). The physical properties of the molding sand was:permeability 235, green compresion, lb/in2 13,1. Cast nickel aluminium bronce Cu3 was tested: Tensile strength, kg/mm2 88,13, Yield strength, kg/mm2 28,3, Elongation in 2 inch, % 10, Metallography: etchant, amonium persulfate. Showing light a phase, eutectoide a + g2 and k phase.

The influence of the moisture and sodium bentonite in the qualite moulding was tested; however one of the mixes was much better, which is the following: Sodium bentonite 7%, Water 4%, Silica sand 87%, ( AFS grain fineness 52). The physical properties of the molding sand was:permeability 235, green compresion, lb/in2 13,1. Cast nickel aluminium bronce Cu3 was tested: Tensile strength, kg/mm2 88,13, Yield strength, kg/mm2 28,3, Elongation in 2 inch, % 10, Metallography: etchant, amonium persulfate. Showing light a phase, eutectoide a + g2 and k phase.

The present research work influences micro-alloys in the bronze alloy, studies the classification bronze Cu1, Cu2, Cu3 and Cu4, defines the structures to the molten state of the materials used in the manufacture of propellers for use in the naval industry . Chemical compositions, metallographic structures, limitations of chemical elements in mechanical properties, as well as limitations of chemical elements in welding processes are defined. The alloy tested, a bronze cast aluminum corresponds to the classification of the complex polyphasic aluminum subgroup 3 or Cu3 classification, NiAl bronze, has an average tensile strength of 64.86 kg / mm2, and an elongation in two inches of 24, 5, the metallographic structure phases are observed: a, a + g2 and k. The corrosion test with the Potentiostat PS4 equipment indicates a corrosion density of 0.38 mA / cm2, the activity in synthetic seawater ...