Quality and specification requirements for 6063 aluminium sheet

Quality and specification requirements for 6063 aluminium sheet

For rapid extrusion, the requirements for 6063 aluminium sheet are higher than for normal extrusion. The aluminium sheet must be homogenised in its entirety, with no oil or inclusions allowed. The homogeneous treatment of the alloy can improve the extrusion speed, compared with the non-homogeneous treatment of the ingot, can make the extrusion pressure reduced by about 6%-15%. For fast-cooled ingots after homogenisation, almost all of the Mg2Si is solidly soluble in the matrix, and any excess Si is also solidly soluble or present as diffusely precipitated fine masses.

Such ingots can be extruded quickly at lower temperatures and obtain excellent mechanical properties and surface brightness. Magnesium is generally controlled at around 0.5% and total Mg2Si at around 0.82%. When the silicon excess 0.01% 6063 aluminum plate mechanical properties σb about 218Mpa, has greatly exceeded the national standard performance, and excess silicon from 0.01% to 0.13%, σb can be increased to 250Mpa, that is, an increase of 14.6%.

To form a certain amount of Mg2Si, must first take into account the silicon loss caused by the content of impurities such as Fe and Mn, that is, to ensure a certain amount of excess silicon. In order to make the magnesium in 6063 alloy fully matched with silicon, the actual ingredients, must consciously make Mg: Si <1.73. excess magnesium not only weaken the strengthening effect, but also increase the cost of the product.

Let's talk again about the requirements of 6063 aluminium sheet for extrusion equipment. The extrusion machine must have a control system of equal speed extrusion and equal pressure extrusion. Recent technological advances, extrusion speed can be achieved program control or simulation program control, but also the development of isothermal extrusion process and CADEX and other new technologies.