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氮气保护铝挤压已在硬铝和软铝合金生产中得到广泛应用。氮气保护铝挤压具有以下优点:减少氧化物粘屑,提高挤压产品表面质量;增加模具寿命,延长坯锭长度;减少修模次数;在不降低表面质量的同时增加挤压速度。自七十年代初期以来,气体产品公司已率先使用液氮作为高纯惰性气体源保护铝挤压。液氮作为一种可靠的惰性气体源,其典型氧含量不到百万分之十。当液氮汽化后通入挤压机内模具区域时,氮气取代了空气,极大
Nitrogen gas protection Aluminum extrusion has been widely used in the production of duralumin and soft aluminum alloys. Nitrogen gas protection aluminum extrusion has the following advantages: Reduce the oxide dandruff and improve the surface quality of extruded products; increase mold life, to extend the length of billet; reduce the number of repair mode; Since the early 1970s, Gas Products has pioneered the use of liquid nitrogen as a source of high purity inert gas to protect aluminum extrusion. Liquid nitrogen, as a reliable source of inert gas, has a typical oxygen content of less than ten parts per million. When liquid nitrogen vaporized into the mold area of the extruder, nitrogen replaced the air, great