冷挤压前,在钢坯上涂磷酸涂层和润滑剂的方法目前已广为使用并得到充分的报导。与硬脂酸盐基润滑剂起反应的磷酸锌涂层也可以用于冷挤压较大的铝及铝合金构件,但尚未得到足够的重视。当处理可热处理材料时,该方法特别优越。虽然操作程序基本上与处理钢所采用的相似,但有很大差异,所以应切实考虑该程序。该操作工序通常与商业和工业部门出版的有关工艺要点中所公布的一致。清理和蚀洗或酸浸除非毛坯上的油脂特别多而需要一个单独的脱脂阶段时,则应在此阶段进行清理。 Methods for applying phosphoric acid coatings and lubricants to billets are now widely used and well documented before cold extrusion. Zinc phosphate coatings that react with stearate based lubricants can also be used for cold extrusion of larger aluminum and aluminum alloy components, but have not received sufficient attention. This method is particularly advantageous when dealing with heat-treatable materials. Although the operating procedures are basically similar to those used to treat steel, they differ widely and should be carefully considered. This procedure is generally in line with the published technical points published in the commercial and industrial sectors. Cleaning and etching or acid leaching Unless a particular amount of grease is required on the blank and a separate degreasing stage is required, it should be cleaned up at this stage.