摘要:
Method for the manufacturing of an Al—Mg—Si(—Cu) extrusion alloy, the alloy initially being cast to extrusion billet(s), containing in wt. % Si: 0.20-1.50 Mg: 0.25-1.50 Fe: 0.05-0.50 Cu: 0.00-1.00 Mn: 0.00-1.00 Cr: 0.00-0.50 Zn: 0.00-0.50 Ti: 0.00-0.20, and including incidental impurities and balance Al.
摘要:
Extrudeable Al-Mg-Si aluminium alloy with improved strength, corrosion resistance, crush properties and temperature stability, in particular useful in or close to the front part of vehicles. The composition of the alloy is defined within the following coordinate points of an Mg-Si diagram: a1 - a2 - a3 - a4, where in wt% a1=0.60 Mg, 0.65Si, a2=0.90Mg, 1.0Si , a3=1.05Mg ,0.75Si and a4=0.70Mg, 0.50Si and where the alloy has a non-recrystallised grain structure in the extruded profile containing in addition the following alloy components in wt%: incidental impurities up to 0.1 each and including Zn up to 0.5 with balance Al.
摘要:
Apparatus and method for filtering molten metal, in particular aluminium, including a container (1 ) with an outer shell or casing of metal and an inner thermally insulated interior cladding or wall construction made of heat resistant insulation and refractory material. A removable lid (2) provided on top of the container to keep the container sealed (air tight) during operation, the container (1) being provided with an inlet chamber (3) having an inlet opening (4) receiving metal from a metal supply launder (10) and an outlet chamber (5) with an outlet opening (6) in which a ceramic or refractory filter (7) is mounted. The inlet chamber (3) and outlet chamber (5) are provided side by side within the container (I) and being split by a partition wall (16) extending from the bottom of the container and upwardly to a preset level of the container interior height. The container (1) is connected in parallel with a metal supply launder (10) via transversal metal launder stubs (8, 9) respectively provided between the inlet (4) and outlet (6) openings of the container and the metal supply launder (10). On the other hand, the launder (10) is provided with a dam (I I) or valve device by the outlet of the container (1) and another other dam or valve device (12) between the two launder stubs (8 and 9), the inlet and outlet openings of the container being optionally further provided with closures or stoppers (13, 14) respectively enabling closing and opening of the inlet (4) and outlet (6) of the container respectively. The filtering of the metal is obtained by initially priming the ceramic filter by drawing the metal upwards through the filter by vacuum to a preset level and then maintaining the metal level in the container during the filtering operation.
标题翻译:VERFAHREN ZUR HERSTELLUNG VON PRODUKTEN MIT ELOXIERTENHOCHGLANZOBERFLÄCHENAUS EXTRUDIERTEN PROFILEN VON AL-MG-SI-ODER AL-MG-SI-CU-EXTRUSIONSLEGIERUNGEN
摘要:
Method for the manufacturing of products with anodized high gloss surfaces from extruded profiles of Al—Mg—Si or AS-Mg—Si—Cu, where the alloys initially are cast to extrusion billets), containing in wt. % Si: 0.25-1.00 Mg. 0.25-1.00 Fe: 0.00-0.15 Cu: 0.00-0.30 Mn: 0.00-0.20 Cr: 0.00-0.10 Zr: 0.00-0.10 Se: 0.00 -0.10 Zn: 0.00-0.10 Ti: 0.00-0.05., and including incidental impurities and balance A.L a) where the billet is homogenised at a holding temperature between 480° C. and 620° C. and soaked at this temperature for 0-12 hours, where after the billet is subjected to cooling from the homogenisation temperature at a rate of 150° C./h or faster, b) the billet is preheated to a temperature between 400 and 540° C. and extruded preferably to a solid shape profile and cooled rapidly down to room temperature, c) optionally artificially ageing the profile, d) deforming the profile more than 10% by a cold roiling operation, whereafter e) the profile is flash annealed with a healing time of maximum two minutes to a temperature of between 450-530° C. for not more than 5 minutes and subsequently quenched, and f) optionally the profile after flash annealing is further subjected to a cold deforming operation to remove residual stresses from cooling and adjusting dimensional tolerances, and g) the profile is finally aged.