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据西德《金属学》杂志1964年10期报导,热挤压铝和铝合金时对毛料和挤压筒内壁给予润滑到目前尚不很普遍。在某些情况下只有对挤压模孔周围给予润滑,这样也能防止铝粘在挤压模沟槽上,因此制品也获得一个良好的表面。对此作了多次试验表明,挤压时给予润滑,对于生产变形复杂、壁较薄的铝合金挤压制品是可能的。但是,如果对组织的均匀性和机械性能要求特别高,又采用无润滑挤压,结果出现一些很明显的缺陷。这些缺陷基本上与下面的原因有关:挤压时挤压筒内壁粗糙、无润滑,结果使毛料的表面区粘到挤压简内壁上,甚至表面区被向前推进的挤压垫刮去,直至卷到毛料内部。
According to the West German “Metals” magazine in 1964 10 reported that hot extrusion of aluminum and aluminum alloy to the wool and the inner wall to squeeze cylinder lubrication is not yet widespread. In some cases only the periphery of the extrusion die hole is lubricated, which also prevents the aluminum from adhering to the extrusion die channel, so that the article also achieves a good surface finish. Several tests on this have shown that it is possible to produce lubrications during extrusion which is possible for the production of aluminum alloy extruded products with complex deformations and thin walls. However, if the organization’s uniformity and mechanical properties are particularly high, the use of non-lubricated extrusion results in some obvious drawbacks. These defects are basically related to the following reasons: extrusion squeeze tube wall rough, no lubrication, the result of the wool surface area stick to the extrusion wall, and even the surface area is pushed forward squeeze the scraping pad, Until rolled into the wool inside.