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The definition of aluminum alloy extrusion ratio

by:AAG     2020-11-07


the definition of aluminum alloy extrusion ratio. Extrusion ratio extrusionratio aluminum extrusion ratio calculation formula is used for aluminum alloy in the production of aluminum extrusion deformation size parameters, also called extrusion coefficient, said: squeeze squeeze than extrusionratio aluminum extrusion ratio calculation formula is used for aluminum alloy in the production of aluminum extrusion deformation size parameters, also called extrusion coefficient, says: before extrusion products total cross sectional area was/extrusion products after total cross sectional area was, therefore, extrusion ratio and the deformation degree has the following: 1, when other things being equal, when the extrusion ratio increases, the metal flow will increase the difficulty of die hole degree, extrusion pressure also increases, 2, when the other conditions at the same time, the increase of extrusion ratio, extrusion of the outer metal ingot billet increased flow resistance is to die, so make internal and external metal flow velocity difference increases, aluminum profile 3, after the extrusion ratio increases to a certain degree, shearing deformation into the inside, aluminum profile deformation to the uniform direction transformation, studies have shown that when extrusion deformation degree, 85% ~ 90%, the rate of total aluminum profile extrusion metal flow evenly, mechanical properties of the products inside and outside layer, tend to be uniform, the choice of the extrusion ratio and alloy type, extrusion method, product performance, extrusion machine, extrusion cylinder diameter and length of ingot factors, if the value is chosen too large, squeeze the opportunities & other arising from excessive extrusion; Stuffy car & throughout; , make the extrusion process can not be normal, even damage the tool, affect productivity, if the value is chosen too small, the ability of extrusion equipment cannot be fully used, is unfavorable to obtain uniform microstructure and property of products, extrusion than general shall meet the following requirements: a extrusion rods, profiles: 8 a 12 rolling, drawing, and forging blank: 5
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