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Eight metal elements property of industrial aluminum | | industry information
eight metal elements affected the property of industrial aluminum industrial aluminum eight elements are: the performance of vanadium, calcium, lead, tin, bismuth, antimony and beryllium and sodium metal elements, based on the purposes of finished aluminium coil is different in joining in the process of the impurity element due to the lower melting point, structure with aluminum compounds are also different, so for the influence of industrial aluminum performance is different also. 1, metal elements: copper element is an alloy of copper is an important element, the influence of solid solution strengthening effect to a certain extent, moreover aging precipitation CuAl2 has a significant limitation of reinforcement effect. Copper content in the aluminium plate usually in 2. 5% - 5%, the copper content in 4% ~ 6. 8% strengthening effect is best, so hard big department of industrial aluminum copper content in the range. 2, the metal elements: the effect of silicon Al - Mg2Si Mg2Si alloy phase diagram rich aluminum alloy balance sector in the largest aluminum solubility of 1. 85%, and with the decrease of temperature and reduction is small, the deformation of industrial aluminum, silicon alone in aluminum limited to welding material, silicon also has certain reinforcement to aluminum. 3, metal elements: the effect of magnesium magnesium is significant for the strengthening of the aluminum, 1% increase magnesium, higher tensile strength about deep far 34 mpa. If the join of less than 1% of manganese, could be reinforcement. So after add manganese can decrease the content of magnesium, and at the same time can reduce the hot cracking tendency, and manganese can also make Mg5Al8 compound average precipitation, to improve the corrosion resistance and welding function. 4, metal elements: the effects of manganese manganese in maximum solubility of solid solution of 1. 82%. Alloy strength increased with the increase of solubility and manganese content is 0. 8%, the elongation reaches maximum value. Al- Mn alloy length of age hardening alloy, namely, strengthening heat treatment. 5, the metal elements: the influence of zinc Al - Zinc alloy system equilibrium phase diagram of rich aluminum department 275 zinc solubility in the aluminum to 31. 6%, and in 125 when its solubility is down to 5. 6%. Zinc in aluminium alone, under the precondition of deformation and strength of industrial aluminum limited progress, at the same time there is stress corrosion cracking, tendency, thus limits its application. 6, the metal elements: the influence of iron and silicon iron in Al - Cu- Mg- Ni- Fe in the forging industry aluminum, silicon in Al - Mg- In Al - Si is wrought aluminium Si electrode and aluminum silicon alloy forging, all of the alloy elements and in its industrial aluminum, silicon and iron is a common impurity elements, have significant effects on function of alloy. They mainly exist in FeCl3 and free silicon. When the silicon is greater than the iron to form beta FeSiAl3( Or Fe2Si2Al9) Phase, while the iron is greater than the silicon, the formation of alpha Fe2SiAl8( Or Fe3Si2Al12) 。 When not at that time, proportion of iron and silicon can cause cracking formation of castings, cast aluminum fe content will make the casting produces too brittle. 7, the metal elements: the influence of boron and titanium titanium is commonly used to add elements in industrial aluminum profile, with Al - Ti or Al - Ti- B alloy form to join in the middle. Titanium and aluminum form TiAl2 phase, core, becomes crystallization of spontaneous ACTS as refinement of forging and weld tissue. Al- Department of Ti alloy package in response, the critical content of titanium is about 0. 15%, if the presence of boron is to slow down to zero. 01%. 8, the metal elements: the influence of chromium and strontium chrome formed in aluminum plate ( CrFe) Al7 and ( CrMn) Al12 intermetallic compounds, such as the way of recrystallization nucleation and growth process, the alloy has certain reinforcement, also improve alloy toughness and reduce the stress corrosion cracking sensitivity. But the venue increased quenching sensitivity, the anodic oxidation film yellow, adding amount of chromium in industrial aluminium profile is generally not more than 0. 35%, and decreases with the increase of the transition elements in the alloy, and strontium to squeeze in industrial aluminum adding 0. 015% ~ 0. 03% strontium, beta in the ingot AlFeSi phase into han glyph of alpha AlFeSi phase, reduced the ingot 60% ~ 70%, average time progress function of material mechanics and plastic machining; Improve the product surface coarse degree. For high silicon ( 10% ~ 13%) Deformation of industrial aluminum adding 0. 02% ~ 0. 07% strontium element, can make the crystal to reduce to a minimum, at the beginning of mechanical function is also obvious progress, tensile strength б b improved from 233 mpa to 236 mpa, yield strength б 0. 2 from 204 mpa to 210 mpa, the elongation б 5 increased from 9% to 12%. The hypereutectic Al - Adding strontium Si alloy, can reduce the particle size of primary silicon, improve the function of plastic processing, can be hot rolling and cold rolling smoothly.