METAL ALLOYS AND POLYMERIC COMPOUNDS
some tips from our alchemists ..
CBSC aim of growth and improvement in the business of machining derive from first from the deep comprehension of chemical-physical properties of metals, and the complicate field of microscopic phenomena that happens during thermal treatments. The company is thus able to offer a good variety of metal alloys and polymeric compounds, giving also useful advices to Technical Offices about the various possibilities of usage of different alloys, in order to obtain the very optimal solution.
steel
Steel alloys used at CB come from Motorsportsector and aerospace and naval industries. Applications are various, with respect to project requirements, but generally these alloys are suitable for high load resistance, impact and fatigue resistance. Thus they result as the best compromise between mechanical resistance ad toughness. We offer as well many thermal treatments available for the many different alloys, which consist in modifications under heating of the molecular structure, resulting in variations of mechanical properties. TT has to be defined with the maximum accuracy since they consist in a compromise between improving/worsening of combination of physical properties. Can be divided in two big categories with respect to a phase transformation in the alloy or not.
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titanium
Ti alloys are well known for their high corrosion resistance and high rate mechanical resistance/weight. They present lightness, hardness, and low density. However these alloys are not easy machinable by CNC workstations, resulting similar by this point of view to stainless steels. The high melting point if Ti element inside the alloy confers good refractory properties. Titanium is resistance as the steel but 40% lighter, and 60% heavier than aluminum but with doubled resistance, resulting in alloys suitable for impact and fatigue resistance too. This material creates a layer of passive oxide if exposed to air at ambient temperature, layer which decreases its ductility and makes it inert from heavily corrosive agents.
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aluminum
Aluminum is a lightweight but resistant metal, with a specific weight equal to the third of steel’s one. Presents excellent corrosion resistance and life duration. Its look silver-grey is due to a thin oxide layer which rapidly takes place if this material is exposed to air, and which prevents the corrosion stopping the oxygen transition from surface toward the core. In order to increase mechanical properties, this element is put in solution with other elements called “alligants”, creating a very wide range of different alloys, grouped in the so called Series. The common points of each one are: low melting temperature, low density, very high electricity and thermal conductivity, Al content inside alloy of over 70%.
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Polymeric compounds
In industrial and mechanical application are commonly used the semi-crystalline polymers, that consist in rigid plastics, and amorphous polymers, that consist in resins and elastomers. The microstructure, i.e. the microscopic architecture and shape of polymer, its complexity of chemical elements in compound and its branching of polymeric chains with respect to the simple linear chains, heavily influence the polymer’s features, in the specific: mechanical resistance, toughness, hardness, ductility, corrosion resistance, behavior at different steps of temperature and at continuous temperature variations, wear and impact resistance.
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