Manufacturing parts cast iron covers a very large field of machinery industry. These materials are iron-carbon alloys, with high percentages of carbon and designated under the name of foundries as this is the industrial process of manufacture thereof. The highest percentage of carbon makes the melting temperature of these is less than that of the steels and also a greater flow of liquid material is achieved which allows the filling of smaller thickness pieces of complex shapes and have improved castability . Moreover, the lower melting temperature allows the metal-mold interaction is less aggressive and thus can obtain a better surface quality parts. Its low cost, and this excellent castability, have led to extensive development of these alloys in applications such as engine blocks, shirts piston, gears, valve bodies, auto parts and many other parts for industrial use. The choice of mate...

The aluminum bronzes are cooper based alloys which contains generally from 8.0% to 12.0% of aluminum. When you add elements such as iron, nickel and manganese along with the phase alpha (α) which is rich in copper and the eutectoid alpha/ gamma2 (α/γ2), it appears precipitations whose nature depends on the elements added quantity, with slow cooling in the sand’s molds (50 ºC/min), are presented alpha.beta´ (α.β´) or alpha, beta´. gamma2 (α, β´.γ2) which because of the different shapes that the precipitations have, they are simplified in k1, k2, k3, k4. For the fusion, it is required a greater care because of its tendency to absorb hydrogen, they respond to heat treatments of quenching and tempering reaching a hardness between 90 Brinell (56 RcB) and 390 Brinell (42 Rc C) always that the k phases are dissolved or uniformly distributed in the main phase.

This research refers to the grey iron lamellar graphite casting and nodular cast iron casting. Both contain variable percentages of copper to a maximum of 4%, cooled in sand molds in which the apparent solubility of copper is limited, to obtain wear-resistant castings, improving the hardenability of gray cast iron and nodular cast iron by the effect of stabilizing the austenite.

This research refers to the grey iron lamellar graphite casting and nodular cast iron casting. Both contain variable percentages of copper to a maximum of 4%, cooled in sand molds in which the apparent solubility of copper is limited, to obtain wear-resistant castings, improving the hardenability of gray cast iron and nodular cast iron by the effect of stabilizing the austenite.

The aluminum bronzes are cooper based alloys which contains generally from 8.0% to 12.0% of aluminum. When you add elements such as iron, nickel and manganese along with the phase alpha (α) which is rich in copper and the eutectoid alpha/ gamma2 (α/γ2), it appears precipitations whose nature depends on the elements added quantity, with slow cooling in the sand’s molds (50 ºC/min), are presented alpha.beta´ (α.β´) or alpha, beta´. gamma2 (α, β´.γ2) which because of the different shapes that the precipitations have, they are simplified in k1, k2, k3, k4. For the fusion, it is required a greater care because of its tendency to absorb hydrogen, they respond to heat treatments of quenching and tempering reaching a hardness between 90 Brinell (56 RcB) and 390 Brinell (42 Rc C) always that the k phases are dissolved or uniformly distributed in the main phase.

Manufacturing parts cast iron covers a very large field of machinery industry. These materials are iron-carbon alloys, with high percentages of carbon and designated under the name of foundries as this is the industrial process of manufacture thereof. The highest percentage of carbon makes the melting temperature of these is less than that of the steels and also a greater flow of liquid material is achieved which allows the filling of smaller thickness pieces of complex shapes and have improved castability . Moreover, the lower melting temperature allows the metal-mold interaction is less aggressive and thus can obtain a better surface quality parts. Its low cost, and this excellent castability, have led to extensive development of these alloys in applications such as engine blocks, shirts piston, gears, valve bodies, auto parts and many other parts for industrial use. The choice of mate...

The high resistance brass belongs to the copper-zinc alloys, which contains elements such as iron, aluminum, manganese and nickel, other elements in very small percentage in such a way that they do not affect the acquired properties and in which manganese increases the solubility of iron, improving mechanical properties and, along with nickel, its resistance to corrosion. The presence of aluminum and iron allow them to be heat treated, the objective of this work is to establish the conditions of heat treatment and its influence on physical, mechanical and corrosion properties.

The high resistance brass belongs to the copper-zinc alloys, which contains elements such as iron, aluminum, manganese and nickel, other elements in very small percentage in such a way that they do not affect the acquired properties and in which manganese increases the solubility of iron, improving mechanical properties and, along with nickel, its resistance to corrosion. The presence of aluminum and iron allow them to be heat treated, the objective of this work is to establish the conditions of heat treatment and its influence on physical, mechanical and corrosion properties.

Polymetallic sulfide ores are found in abundance in nature and especially in our country, hence the great importance of studying their behavior in the differential flotation. There are ores that are very amenable to flotation and there are also other complex minerals that have a very complicated flotation because of different factors, the most difficult ones are those with natural activation of sphalerite and iron sulphides due to soluble salts that the mineral can have as a result of the presence of metal ions from different metals, mainly copper. The copper, lead and zinc ore that was studied did not show difficulties during the selective flotation; the quality and the separation efficiency of concentrates can be improved with more time and more stages of flotation cleaning. We defined the theoretical concepts of the selective flotation and made the mineralogical and chemical study of ...

Polymetallic sulfide ores are found in abundance in nature and especially in our country, hence the great importance of studying their behavior in the differential flotation. There are ores that are very amenable to flotation and there are also other complex minerals that have a very complicated flotation because of different factors, the most difficult ones are those with natural activation of sphalerite and iron sulphides due to soluble salts that the mineral can have as a result of the presence of metal ions from different metals, mainly copper. The copper, lead and zinc ore that was studied did not show difficulties during the selective flotation; the quality and the separation efficiency of concentrates can be improved with more time and more stages of flotation cleaning. We defined the theoretical concepts of the selective flotation and made the mineralogical and chemical study of ...